US1841505A - Method and apparatus for removing oil from the crank cases of engines - Google Patents

Description

Jan, 19, 1932. E. .1. SWEETLAND 1,341,505

METHOD AND APPARATUS FOR REMOVING OIL FROM THE CRANK CASES OF ENGINES Filed Aug. 27, 1924 3 Sheets-Sheet l 7 3' 2 9 29 I 72 I 24- Z3 2 25 26% 7 F: f 6' 9 H1 ii (i INVENTOR. ,Ff/VfSTfSl VfffZfl/Vfl Jan. 19, 193 E. J. SWEETLAND 1,341,505

METHOD AND APPARATUS FOR REMOVING OIL FROM THE CRANK CASES OF ENGINES Filed Aug. 27, 1924 3 Sheets-Sheet 2 I N VEN TOR.

Jam. 19, 1932. J, SWEETLAND I 1,841,505

METHOD AND APPARATUS FOR REMOVING OIL FROM THE CRANK CASES OF ENGINES Filed Aug. 27, 1924 3 Sheets-Sheet 3 H I l .49 n i h Q J 5 EV I! 5 I 2 6; ya m 45a 45 47 4';

IN V EN TOR.

Patented Jan. 19, 1932 UNITED STATES PATENT OFFICE METHOD AND APPARATUS FOR REMOVING OIL FROM THE CRANK CASES OF ENGINES Application filed Augult 27, 1924. Serial No. 784,890.

This invention relates to an apparatus for effecting rapid removal of oil from the crallilk t e pakse of internal combustion engines or 5 In the operation of internal combustion engines and especially automotive internal combustion engines, the oil which is put into the engine rapidly deteriorates, due to the accumulation of carbon particles, road dust,

metal particles, etc., therein and to dilution from gasoline which escapes past the piston rings, so that proper care of the engine necessitates frequent drainage of the oil from the crank case, and refilling with fresh oil.

To permit draina e of the oil, the engine makers have hereto ore provided the lowest portion of the crank case with a removable drainage plug or a pet cock, through which the oil could be drained by gravity; however the inconvenience and time required to drive the car upon a rack, crawl under the car, remove the plug, wait for the somewhat viscous oil to drain out, replace the plug and then go through the same steps to flush out .25 the crank case and oil conduits with kerosene or the like has been one of the most disagreeable tasks in the care of the automobile, either when performed by the owner or at a service station.

It is one of the objects of this invention to provide a means for draining the oil from the crank case of an automobile without the necessity for crawling under the automobile or driving the same upon a rack or for waiting for the oil to drain out by gravity. An-

other object of the invention is to provide a means for draining the crank case whereby the oil which flows by gravity from the drainage opening of the crank case may be 40 quickly removed to a convenient discharge receptacle.

Another object of the invention is to provide an ejector adapted to be secured to the drainage opening at the lowest portion of the crank case of an automobile engine and to have the inlet for the com ressed fluid for operating the ejector, and the outlet for the oil discharged from the crank case by the ejector located above the crank case and preferably beneath the hood of the automobile so that connection may be readily made with the same for draining the oil from the crank case.

Another object of the invention is to provzde a system for draining and refilling the crank case of an automotive internal combustion engine whereby the oil may be drained from the crank case and forced from a point below the drainage opening into a discharge receptacle, and new oil forced in thru the drainage opening to refill the crank case.

Another object of the invention is to combine with the crank case of an internal combustion engine an ejector, so that by making suitable pressure connections with the ejector nozzle, the oil which flows into the ejector may be quickly discharged therefrom.

Another ob ect of the invention is to provide a pressure means, utilizing a source of pressure which is ordinarily available around service station,

for rapidly rethe garage or moving the 011 from the crank case of an engine.

Various other objects and advantages will appear as the description of the invention proceeds.

In the drawings which illustrate various forms of embodiment of the invention,

Figure 1 is a sectional view of the bottom of a crank case, showing one form of ejector secured to the drainage opening thereof.

Figure 2 is a diagrammatic elevation of one system for discharging and refilling a crank case embodying my invention.

Figure 3 is an elevation of an engine equipped with another form of my oil discharging apparatus.

Figure 4 is a part sectional view of a crank Bil case showing an ejector discharge mechanism formed as a part of the crank case.

Figure is a sectional view on the line 5-5 of Figure 4.

Figure 6 is a side elevation of an engine equipped with another form of embodiment of my invention.

Figure 7 is an end view of the engine shown in Figure 6 with parts thereof omitted for the sake of clearness.

Figure 8 is a detail view of one form of breather opening for use with the embodiment of the invention shown in Figures 6 and 7.

In Figure 1, the bottom 3 of the crank case 2 of an automobile internal combustion engine is provided preferably at its lowest portion with an enlarged drainage opening 4 thru which the oil in the crank case may flow when the drainage plug is removed, to drain the crank case. According to my invention, an ejector 6 is secured to the bottom of the crank case 2 in any desired manner, with the opening 7 into an ejector chamber 8 in communication with the opening 4 so as to permit the oil to flow by gravity into the ejector.

The ejector 6 is provided with a constricted opening 9 and with a nozzle 10 for compressed air or other fluid under pressure, which extends into the constricted opening 9 but is spaced therefrom, forming an annular passage 11 thru which the oil from the cham ber 8 may be drawn to discharge the same thru the outlet pipe 12 when air or other fluid under pressure is forced by the nozzle 10 thru the opening 9.

The nozzle 10 is connected with a pipe 14 which extends upward above the crank case, and is provided with bayonet slots 14a for easy connection with the ends 150: of an air hose 15, adapted to supply compressed air to the nozzle 10. The end of the pipe 12 is also extended upward to a position under the hood of the automobile and is provided with bayonet slots 12a for easy connection with the discharge and refill conduit 16. Preferably the ends 12a and 14a of the pipes 12 and 14 are brought to the same side of the engine so that all the connections for draining the oil may be made from one side. When not connected to the conduits 15 and 16, the ends of the pipes 12 and 14 may be closed with suitable caps to prevent the entrance of dust into the same.

In order to permit rapid refilling of the crank case with new oil, the pipe 16 is connected with a three-way valve 17 adapted, when in the position illustrated, to connect the pipe 16 with the conduit 18 to the discharge receptacle 19. When all the oil has been discharged from the crank case, the air to the nozzle 10 may be shut off and the stem of the valve 17 rotated to the dotted line position to connect the pipe 16 with the pipe 20, which communicates with the oil receptacle 21 containing oil under pressure, so that the oil will be forced rapidly thru the ejector 6 into the crank case.

The oil receptacle 21 is preferably made of glass and is provided with calibrations 22 thereon which read downward, so that the level of the oil will indicate directly the number of quarts or other units which have been discharged from the receptacle.

The top of the receptacle is provided with a pet cock 23 which is opened to release the pressure when the receptacle is being filled with oil from the pipe 24, which is controlled by a valve 24a. The air inlet pipe 25 for creating the pressure for forcing the oil out of the receptacle 21 is controlled by the valve 25a and extends above the normal level of the oil in the receptacle. A gauge 26 indicates the pressure in the receptacle.

In order to prevent a portion of the oil which is forced by pressure into the crank case from escaping from the top of the pipe 14, a check valve may be provided in a connection 281; between the pipe 1% and nozzle 10. A sprin 23 normally urges the valve 28 against its seal, but permits the valve to open when air under pressure is introduced into the pipe 14. lf desired, the valve and connection 28a may be omitted and the upper end of the pipe 1-l may be close in any suitable way to prevent the oil from escaping therethru when the crank case is being filled.

A plug 13 in the wall of the ejector chamber 8 permits the crank case and ejector to be drained by gravity when desired.

in the operation of the device, the air under pressure which flows from the pipe 10 thru the opening 9 works on the well-lrnown principle of an ejector to draw the oil which flows into the chamber 8 from the crank case, thru the space 11 around the nozzle 16, and discharge the same thru the pipe 12. zi lion all the oil has been discharged, the valve 17 is turned to permit the new oil in the recepta cle 21 to flow under pressure into the crank case. The entire operation of draining and refilling the crank case with the use of my apparatus and system can be completed in a small fraction of the time required under the present procedure.

W hen it is desired to omit the discharge connection 12a and discharge conduit 16, the device of Figure 3 may be used. In this embodiment of the invention, the pressure inlet 14:?) to the ejector 6a which is secured to the bottom of the crank case 2 may be provided with an ordinary valve stem connection 140, adapted to cooperate with the valve which the ordinary tire inflating hose is equipped with, to open communication between the air under pressure in the tire inflating equipment of the service station and the inlet 14b to the ejector when the valve on the tire line is pressed against the top of the pipe 145. The discharge outlet from the ejector is connected to an inverted U-shaped discharge pipe 126 which is open at its discharge end and preferably projects downward below the oil pan of the engine, so that when pressure connection is made with the pipe 145 and air or other fluid under pressure is forced thru the ejector, the oil in the crank case will be discharged from the pipe 12?; into a suitable container or upon the ground below the automobile.

In Figures 4 and 5, the ejector 6b is shown as builtinto the crank case 2a and as being adapted to discharge the oil thru the outlet 27 into a'suitable receptacle below the crank case. The ejector comprises the conduit 128 which communicates at the top with the outlet 27 and is provided with a restricted orifice 129 at the bottom into which the pressure discharge nozzle 30 projects, a pipe 31 connects with the nozzle 30 below the crank case and extends upward to a position under the hood of the automobile where it may be provided with a valve stem connection 31a for connection with a source of pressure.

The ejector is located at the lowest portion 2d of the crank case 2a so as to receive oil therefrom by gravity, and to discharge the oil thru the outlet 27. A plug 32 on the bottom of the crank case carries the nozzle 30 of the ejector and may be removed by disconnecting the union 30a, to permit cleaning and inspection of the ejector or to permit drainage of the oil by gravity from the portion 203 of the crank case. As illustrated, the ejector mechanism of Figures 4 and 5 may be formed integral with the crank case by casting or may be formed as an inverted U-tube separate from the crank case and inserted into the crank case thru a hole located above the oil level, the opening 28a between the conduit 128 and the outlet pipe 27 is located above the normal oil level to prevent the oil from flowing by gravity from the crank case.

It is to be noted in connection with Figures 3 to 5 that it is only necessary to raise the hood and press the nozzle of a tire inflating line against the connection 140 or 31a to discharge the oil from the crank case.

A further embodiment of a means for forcing the "oil from the crank case of an engine is shown in Figures 6 to 8. In this embodiment, the crank case 41 of the engine 42 is provided with a discharge pipe 43 which extends from the lowest portion 41a thru the wall of the crank case at a point above the normal level of the oil therein and outside the crank case is provided with a connection 44 for a hose or other discharge conduit.

The breather opening 45 for the crank case is provided with a central collar 46 supported from the walls of the opening by the web arms 47, and the stem 48 of the breather cap 49 extends into this collar. The collar 46 and stem 48 are provided with cooperating threads 46a and 4811 which are preferably of a relatively steep pitch and the coil spring '50 which surrounds the stem 48 is secured to the cap 49 and one of the arms 47 by the pins 51 and 51a. A handle 52 is provided for turning the breather cap, and a gasket 53 is provided around the bottom thereof to insure a tight seal with the breather opening. An adjustable safety valve 54 is provided in the cap 49 to automatically open and relieve the pressure in the crank case when it exceeds a predetermined amount.

A cap or other suitable means may be provided for closing the usual filling opening of the crank case, tomake the same substantially air tight and a pressure connection 55 is provided into the crank case.

In the operation of this embodiment of the invention, a discharge conduit is connected onto the pipe 43 and the handle 52 of the breather cap 49 is turned a quarter turn to screw the stem 48 into the collar 46 and bring the gasket 53 into fluid tight engagement with the topof the opening 45 to close the breather opening. Air or other fluid under pressure is then admitted to the crank case thru the connection 55 and as the pressure on the oil increases the oil in the crank case is quickly forced out thru the pipe 43. When all the oil has been discharged the pressure fluid thru the connection 55 is turned olf,

the handle 52 of the breather cap may be released and the spring 50 will turn the cap in the other direction to move same away from the breather opening to thus automatically open the breather and insure proper operation of the engine.

New oil may be forced into the crank case thru the pipe 43 as is illustrated in connection with Figure 2 or the crank case may be filled in the usual manner thru the filling opening.

Where it is not desired to use a detachable hose or other conduit for conveying the oil from the end of pipe 43 the pipe may be provided with a permanent extension which projects downward to discharge the oil below the engine as in the U-tube construction 12b of Figure 3.

It is pointed out that when the method herein described of rapidly removing the oil from a crank case is employed, the crank case is left cleaner and freer from sediment than is the case when drained thru aplug in the ordinary manner, because of the greater rapidity of the operation. To get the best result the engine is run prior to the drainage operation until the oilis warm and all sediment is in suspension. Then without delay the warm oil is rapidly forced out without giving the sediment an opportunity to settle again. This results in leaving the crank case cleaner than is the case when the oil is drained thru the ordinary drain opening by gravity after the delay of removing the plug.

I may use any fluid under pressure with the ejector; even water may be employed.

Under certain conditions oil, and particularly used oil previously drained from other crank cases may be used to advantage.

In compliance with the patent statutes, I have illustrated and described several preferred embodiments of my invention but it is to be understood that various modifications and changes may be made therein and that parts of the invention may be used without others without departing from the spirit of my invention or the scope of the appended claims.

I claim:

1. The combination with the crank case of the engine of an automobile, of an ejector communicating with said crank case and adapted to receive oil therefrom, a pressure fluid inlet to said ejector, a check valve in said inlet, a discharge outlet from said ejector, and means positioned beneath the hood of the automobile for permitting connection of an external source of pressure fluid and a discharge conduit to said ejector inlet and outlet respectively whereby the contents of the engine crank case may be discharged when the engine is not running.

2. In an apparatus for discharging oil from the crank case of an engine, a chamber adapted to be connected to and receive oil from a discharge opening in said crank case, an ejector connected with said chamber, a pressure inlet and a discharge outlet for said ejector, a conduit connected to said discharge outlet to convey the discharged oil to a place rempte from said chamber, a valve in said conduit, a receptacle for new oil and means to force new oil under pressure back thru said conduit and ejector into the crank case when said valve is turned to open communication betwecn said conduit and said receptacle for new oil.

3. In an apparatus for removing used oil in automotive internal combustion engines, a conduit having connection to a low point in the oil containing case of said engine, means for bringing into connection with said conduit acombination induction and eduction tube and means of causing the used oil to pass in an outward direction thru said conduit, said means comprising a conduit attached to the eduction tube and extending upwardly to a point accessible from above the crank case upon raising the motorhood and a connecting gas pressure conduit at a suitable service station adapted to be attached to said educ-.

tion conduit to displace the used lubricant.

4. The combination with the crank case of an internal combustion engine of an inverted U-shaped conduit, having an orifice in one end thereof, adjacent the lowest portion of the crank case, a discharge outlet from the crank case at the other end thereof, a pressure nozzle extending into said orifice, an inlet connection for pressure fluid .to said nozzle and means for removably connecting a pressure line from external source to said nozzle.

5. The combination with the crank case of an internal combustion engine of an oil discharge conduit, extending thru the wall P the crank case above the normal oil level, means for making the crank case fluid tight, means for'introducing fluid under pressure into said crank case to force the oil out thru said discharge conduit, and means for automatically opening the crank case to the atmosphere.

6. The combination with the crank case of an internal combustion engine of an oil dis charge conduit, extending thru the wall of the crank case above the normal oil level, means for making the crank case fluid tight, means for introducing fluid under pressure into said crank case to force the oil out thru said discharge conduit, means'for relieving the pressure in the crank case when it exceeds a predetermined amount, and means for automatically opening the crank case to the atmosphere.

7. In a system for discharging used lubricant from vehicle motors, the combination with the lubricant holding case of the vehicle motor provided with a drain opening located in the lowermost portion of said case of a discharge chamber attached below and communicating with said drain opening, of a discharge conduit attached to and carried by said chamber, a pressure inlet to said chamber, and an ejector nozzle connected to said pressure inlet and adapted to force the used lubricant from the case out of the discharge conduit.

8. In a system for discharging used lubricant from vehicle motors, the combination with the lubricant holding member of the vehicle motor provided with a drain opening located in the bottom of such member, of a drain chamber attached to and communicating therewith, a discharge conduit and a pressure inlet connection in said drain chamber, the chamber being formed as an ejector and a connecting pressure hose located at a suitable service station to be connected to the inlet connection of the ejector whereby the used oil may be quickly withdrawn from the vehicle motor.

9. In a system for discharging lubricant from the crank case of a vehicle motor, a drain chamber below said case and communicating therewith, a discharge conduit attached to the chamber adapted to communicate with an outlet thereof and extending upwardly to a point above the highest level of the liquid in the crank case and to a point acressible from above said crank case upon raising the motor hood, a pressure inlet hose extending to the inlet of said chamber from a point of ready accessibility above the crank case, and external pressure means adapted to Ill 1 extending upwardly be temporarily connected to the inlet hose to force the lubricant from the engine.

10. In a system for discharging lubricant from the crank cases of motor vehicle motors, an ejector chamber attached to and draining said crank case, discharge and inlet conduits attached to respective portions of the said chamber extending upwardly to a point above the highest-level of the liquid in the crank case and to a pointaccessible from above the crank case upon raising the motor hood, a pressure means located at a suitable service station adapted to be applied to said inlet conduit to eject the lubricant from the case and a suitable eduction hose to be applied to the discharge conduit, said eduction hose being provided with a three way cock to permit discharge of the spent lubricant and inlet of fresh lubricant.

11. In a system for discharging lubricant from the crank case of a vehicle motor, an ejector chamber draining said crank case, a discharge and an inlet conduit attached to respective portions of the ejector chamber and to a point above the highest level of the liquid in the crank case, the inlet conduit extending to a point accessible'from above the crank case upon raising of the motor hood, and a pressure hose from a suitable service station external of the vehicle adapted to be applied to the inlet conduit to rapidly eject the lubricant.

12. In an apparatus for discharging lubricant from a motor vehicle, the combination 0 a lubricant containing case, a discharge conduit secured to the said case and communicating with the same below the body of lubri cant therein, and extending to a point readily accessible above the point at which the same is secured to the containing case, said conduit being adapted to normally prevent the flow of lubricant from the said case, an inlet communicating with the interior of the said case above the normal level of lubricant within the said case, means for connecting the said inlet with a source of air under pres sure, and means for connecting the discharge pipe with a lubricant receiving container.

13. In a system for discharging lubricant from vehicle motors, the combination with the lubricant containing case of the motor vehicles provided with admin opening located in the bottom of such case, of a discharge conduit secured to the said case communicating with the said opening and extending to a point accessible from above the said opening and normally closing said drain opening to prevent the discharge of lubricant therefrom, an inlet opening above the normal lubricant level in the said case, means in open communication with the said inlet and connected with a source of air under pressure, and means connecting the said drain conduit with a lubricant receiving container.

14. In a filling station accessory, the combination of a pressure hose, means for temporarily establishing a union between one end of the said hose and an inlet in the lubricant case of a motor vehicle, a container, means for temporarily establishing communication between a drainage outlet in the lubricant containing case and the container, and means to produce a relatively higher pressure in the lubricant containing case than in the container.

15. In an apparatus for dischargin lubricant from a motor vehicle, the com ination of a lubricant containing case, a discharge conduit secured to said case to remove the lubricant therefrom, an inlet communicating with the interior of said case adapted to be connected with a source external to the engine parts of fluid under pressure to expel the lubricant from the case to a point external to said crank case.

16. The apparatus according to claim 12, wherein the case has a safety valve to prevent damage in the event of the air pressure in the case of becoming excessive.

17. In an apparatus for discharging lubricant from a motor vehicle, the combination of a lubricant containing case, a discharge conduit secured to the case and communicat ing with same in position to carry off the lubricant therein, said discharge conduit extending to a readily accessible point on the vehicle and being adapted normally to prevent flow of lubricant from said case, the case having an inlet communicating with the interior thereof, and means for connecting said inlet with a source of gaseous fluid under pressure to force the lubricant out through the discharge pipe.

18. In a system for discharging lubricant from vehicle motors, the combination with the lubricant containing case of the motor, said case being provided with a depression to which lubricant tends to drain, of a discharge conduit secured to said case communicating with said depression and extending to and discharging at a point outside the crank case, the lubricant containing case having an opening and means in communication with said opening to be connected with a source of fluid under pressure to force the lubricant in the case out thru said discharge pipe.

19. In an apparatus for removing the oil from a crank case of an internal combustion engine, said crank case being provided with a lowermost point to which the oil will drain, a tube built into said case and having its lower end extending to a point adjacent to the lowermost portion of the crank case, and having its upper end above the normal lubricant level of said case, means for creating a diference in pressure in said tube to cause the lubricant to discharge from the upper end of said tube and means to convey the discharge from said tube to a point external of the engine.

20. In an automotive internal combustion engine, of the class described, having a lubricant containing crank case, an eduction tube therein, the lower end of said tube extending into said crank case lubricant, and the upper end projecting externally of said crank case inlet, means connected to a source of superatmospheric pressure to remove the crank case lubricant from said crank case by introducing a fluid under pressure into said crank case.

21. In an apparatus for discharging lubricant from a motor vehicle, a crank case, a conduit extending below the level of the lubricant in said crank case and extending above the level of said lubricant and external of said crank case, an inlet communicating with said crank case and means to connect the inlet with a source of fluid under pressure to force the lubricant thru said conduit.

22. The combination with the crank case of an engine of an automobile of an ejector communicating with said crank case adapted to receive oil therefrom, a pressure fluid inlet to said ejector, a discharge outlet from said ejector above the normal oil level in said crank case and means ositioned beneath the hood of the automobil for permitting connection of an external source of pressure fluid and a discharge conduit to said ejector inlet and outlet respectively, whereby the contents of the engine crank case may be discharged when the engine is not running.

23. In an apparatus for discharging oil from the crank case of an engine, a chamber adapted-to be connected to and receive oil from a discharge opening in said crank case, an ejector connected with said chamber, a pressure inlet and a discharge outlet for said ejector, and a conduit connected to said discharge outlet to convey the discharged oil to a place remote from said chamber and engine.

24. In an apparatus for removing used oil in automotive internal combustion engines. a conduit having a connection to a low point in the oil containing case in said engine, means for bringing into connection with said conduit a combination induction and eduction conduit, means for causing the used oil to pass in an outward direction thru said conduit, said means comprising a conduit attached to the eduction tube and a connecting gas pressure conduit adapted to be attached to said eduction conduit to displace the used lubricant and discharge said lubricant to a place remote from the engine.

25. The combination with the crank case of an internal combustion engine of an inverted U-shaped conduit, an orifice in one end thereof, adjacent the lowest portion of the crank case, a discharge outlet from the crank case at the other end thereof, a pressure nozzle extending into said orifice, an inlet connection for pressure fluid to said nozzle, and means for removably connecting a gas pressure line from an external source to said nozzle.

26. A combination with the crank case of an internal combustion engine normally open to atmospheric pressure of an oil discharge conduit, extending thru the wall of the crank case above the normal oil level, means for making the crank case fluid tight, means for introducing fluid under pressure into said crank case for forcing the oil out thru said discharge conduit and means for opening the crank case. to the atmosphere.

combination with the crank case of an internal combustion engine normally open to atmospheric pressure of an oil discharging conduit, extending thru the wall of a crank case above the normal oil level, means for making the crank case fluid tight, means for introducing fluid under pressure into said crank case, to force the oil out thru said discharge conduit, and means for relieving the pressure in the crank case, when it exceeds a predetermined amount.

28. In a system for discharging used Inbricant from the crank case of a motor vehicle, a drain chamber below said case and communicating therewith, a discharge conduit attached to the chamber, adapted to communicate with an outlet thereof and extending upwardly to a point above the highest level of the liquid in the crank case and to a point accessible above the crank case, a pressure inlet conduit, extending to the inlet of said chamber from a point of ready accessibility above the bottom of the crank case and external pressure means adapted to be temporarily connected to said inlet conduit to force the lubricantfrom the engine to a point remote thereto.

29. In a system for discharging lubricant from the crank case of a vehicle motor, an ejector chamber draining said crank case, a discharge and an inlet conduit attached to respective portions of the ejector chamber, and extending upwardly to a point above the highest level of the lubricant in the crank case, the inlet conduit extending to an accessiblc point and a pressure hose from an external source adapted to be applied to the inlet conduit to rapidly eject the lubricant.

30. In an apparatus for discharging lubricant from a motor vehicle, a lubricant containing case, a discharge pipe secured to said case, communicating at a point within the body of lubricant therein and near the bottom thereof, and extending to a point readily accessible above the lubricant containing case, said pipe being adapted to normally prevent the flow of lubricant from said case, an inlet communicating with the interior of the said case above the normal level of lubricant withmeans for connecting said inlet in said case,

pipe secured to the said case and communicating with the same from below the body of lubricant therein, and extending to a point readily accessible above the point at whicli v the same is secured to the containing case, said pipe being adapted to normally prevent the flow of In ricant from the said case, an inlet communicating with the interior of the said case above the normal level of lubricant within the said case, means for connecting the said inlet with a source of air under pressure, and means for connecting the discharge pipe with a lubricant receiving container.

32. In a crank case for internal combustion engines comprising an oil sump, a conduit leading from said sump and extending g5 upwardly to a point above the normal oil level of said crank case, means for rendering the crank case substantially fluid tight and means carried by said crank case whereby fluid under super-atmospheric pressure may be admitted thereinto to cause the oil to flow upwardly from said sump to a point external to said crank case.

33. In a crank case for internal combustion engines comprising an oil sump, a conduit leading from said sump and extending upwardly to a point above the normal oil level of said crank case, means for rendering the crank case substantially fluid tight an means carried by said crank case whereby fluid under super-atmospheric pressure may be admitted thereinto to cause the oil to flow upwardly from said sump to a point external to said crank case, safety means associated with said crank case to prevent said superatmospheric pressure from exceeding a predetermined limit.

34. In a crank case for internal combustion engines comprising an oil sump, a conduit leading from said sump and extending upwardly to a point above the normal oil level of said crank case, means for rendering the crank case substantially fluid tight and means carried by said crank case whereby fluid under super-atmospheric pressure may be admitted thereinto to cause the oil to flow upwardly from said sump to a point external to said crank case, said means of rendering the crank case fluid tight being so constructed as to open said crank case to atmos 'herie pressure automatically when released y the operator.

35. A crank case for automotive internal combustion engines having a tube built into said case, one end of said tube being adjacent 65 to an oil sump in said case and the opposite end of said tube being located at a level above the normal oil level of said case, means of ensealing the normal vent of said case to render said case temporarilly fluid tight and means of forming a temporary union with an external source of fluid under pressure to force the oil to discharge from said sump thru said tube to a pointexternal to said case.

36. An automotive engine having an oil carrying case, said case having a low point to which oil will drain, an ejector chamber in open communication with said case, an opening to said chamber adapted to receive a connection from a source of fluid under pressure external to said engine, an eduction tube leading from said chamber adapted to discharge oil from the oil carrying case to a point external to said engine when a fluid under pressure is applied to said ejector.

37 An apparatus for rapidly removing the used lubricant from the lubricant carrying case of an automotive vehicle engine comprising a sump in said case to which the lubricant Will drain, a conduit leading from said sump to conduct the used lubricant to a point external t0 and not forming a part of said engine, a fluid pressure connection associated with said engine and adapted to be connected with a source of fluid pressure external to said engine to forcibly eject the lubricant from said sump.

38. An apparatus for rapidly removing the used lubricant from the lubricant carrying case of an automotive vehicle engine and rapidly replacing said lubricant with a fresh supply of same which comprises a sump in said case to which the contained lubricant will: drain, a discharge conduit with an opening ad acent to said sump, a fluid pressure connection associated with said engine adapted to be connected with a source of fluid pressure external to said engine to forcibly eject the lubricant from said sump thru said conduit to a point external to and not forming part of said engine and pressure means to force fresh lubricant into said lubricant carrying case thru said conduit after the used lubricant has been expelled.

39. The combination with the oil carrying case of an automotive engine having a sump to which oil will drain of an eduction conduit one end of which leads from said sump upwardly to a point above the normal oil level in the engine and then turns downwardly to lead discharged oil to a point external to said case and said engine, an opening associated with said case to receive fluid pressure from a source external to said engine, said fluid pressure acting to forcibly discharge the oil from said case thru said conduit.

40. In an apparatus for discharging lubricant from a motor vehicle, the combination of a lubricant containing case, a discharge conduit secured to said case and communicating With same below the level of lubricant therein and extending to a point readily accessible above the point at which the same is secured t0 the containing case, said conduit being, adapted normally to prevent the flow of lubricant from said case, an inlet communieating with the interior of said case, means for connecting the said inlet with the source of fluid under pressure, said discharge conduit extending outside the lubricant contain ing case.

In testimony whereof I have affixed my signature to this specification.

ERNEST J. SXVEETLAN D.

Images