US2365023A - Device for dislodging valve assemblies of internal-combustion engines - Google Patents

Description

A. J. TAYLOR DEVICE FOR DISLODGING VALVE-ASSEMBLES OF INTERNAL-COMBUS'IION ENGINES Filed June 14, 1945 A2 Sheets-Sheet l x AL Dec, 12, 1944. A. J. TAYLOR 2,335,023

DEVICE FOR DISLODGING VALVE-ASSEMBLIES OF INTERNAL-COMBUS'TION ENGINES 2 Sheets-Sheet 2 Filed June 14, 1943 Patented Dec. 12, 1944 BLIES GINES OF INTERNAL-COMBUSTION EN- Asa J. Taylor, Zion, Ill., assignor .to T. C..M..Man ufacturing Company, a corporation of Il1inois Application June 14, 1943, SerialNo. 490,739

3 Claims. (Cl. ZIJ-214) My invention relatesV to a device for use in` dislodging valve-assemblies as, for example, for the purpose ofrepair or substitution, from openings in internal combustion engine blocks in which they are positioned for use.V Such valveassemblies, which commonly comprise bushings ori-housings at which they iitin the openings referred to, and reciprocable valve elements in the bushings, oftentimes become so ltight in the engine blocks as to render them very diiiicult of removal, often resulting, according to the presenti day methods employed to remove them, in

`impairment of the valve-assemblies as, for example, by bending them out of shape, and requi'ring a longtime to dislodge them.

My primary object is to provide 'a device for the purpose stated which shall beof simple con struction, easy to operate, highly effective to dislodge the valve-assemblies as desired, and by a quick operation and by the use of which impairment of `the valve-assemblies is avoided. Other objects will be apparent from the following description.`

Referring to the accompanying drawings:

Figure 1 is a fragmentary view, partly in vertical sectonal elevation, ofA an internal combustion engine of the type currently used in Ford automobiles showing, in full elevation, one of the valve-assemblies thereof controlling, for eX- ample, the inlet of gas to the cylinders: this view also showing a valve-assembly-dislodging device constructed in accordance with my invention, applied to position preliminary to its operation for dislodging the valve-assembly.

Figure 2 is a section taken at the line 2`2 on Fig. l and viewed in the direction of the arrows.

Figure 3 isa fragmentary sectional view taken at the line 3-3 on Fig. 1 and viewed in the direction of the arrows.

Figure 4 is a view in vertical sectional eleva tion of the device showing, by full lines, its operative parts conditioned for operation of the device to dislodge a valve-assembly to which it may be applied.

Figure 5 is a sectionftaken atthe line Eff-5 on Fig. 4 and viewed in the direction oithe ar rows; and

Figure 6, a section taken at the line 6-6 on Fig. 4 and` viewed in the direction of` the arrows.

As a preface to a description of the construe tion of my device, reference is made to the illustrated constructionv of internal combustion engine which is of the conventional current Ford type for use in connection with` which, to disn ular-ly devised-my dislodging "device, although not with? the intention of limiting the invention toa 'device for use in` connection with such an engine.

Theengineshown'comprises a cylinder block 7, its cover, not shown, being removed and one of the Acylinders thereof beingshown at 8, 'the block 'Il havin-g gast passages with terminal seats, one of these passagesbeing shown at 9 and its seat-.at |20 and beingrecessedat Il, the recess I'I openingfthrough the top'of the cylinder block.

Theengine `shown ialso 'comprises valve-assemblies :controlling `the Ygas passages referred topthe'valve-assemblyfor the/gas passage 9 beingV representedat 1|a2 and, by way of example andixas shox/vn,` being of the construction .described in {.U. ,S..Le.tters Patent No. 2,286,695 grantedto'ame June '16, :1942.

The valve-assembly shown `comprises a bush'- ingcor :housingl Ywhich ts in an opening I4 in the cylinder block in alignment with the valve seat Ill. Thebushing `I3 has a peripheral groove I5 to receive a stirrup bracket (not shown) whichilatwise abuts the portion I6 of the Wall of the :recess I-I-whichrsurrounds the opening |54, to` preventiiaccidentaloutward displacement of thevalve-assembly in the operation of the engine; Reciprooable in the bushing I3 'is a stem ITIA carrying a valve head4 I8 for cooperation with the valve-seat I Il, the valve. head I8- being pressed against theseat i!) by a coil springv I9 surrounding the stem I'I and interposed between a shoul-` lodge itsvalve-assemblies, I have more partic- 55`l der 20 onthe lbushing I3 and an abutment 2| on thelower end of the stem I'I.

Thefstem VI` is` in alignment with a plunger 22' reciprocable in an opening 23 in the cylinder block and against which the stem Il constantly bears `under theaction` ofrthe spring I9, the plunger 22 bearing against cam mechanism carried by the cam shaft illustrated at 24.

Itinay here be stated that in accordance with myinventon it is intended the dislod-ging` device hereinafter describembe applied to operative position between the inner, end ofthe valveassembly (more Ispeicifica-lly theinner endv of the valve steml Hf),- andthe plunger 22 andA operated to. exert outward` force on the valve-assembly to dislodge it, from the opening' I4'. v

Referring nowtol theparticula-r illustrated construction of my dislodging device, it comprises a main, member 25, ani auxiliary member' 2'6, .pive otally ,connected atV lll to the lower end of the"4 main member 25; a: member 28 Imovable on the auxiliary member-326| and means for exerting force' to; spread the members 26i and 28 apart. The

members 26 and 28 terminate in ilatwise opposed portions 29 and 30, respectively, at which the device is adapted to be inserted between the valve stem |1 of the valve-assembly to be dislodged and the plunger 22 cooperating with this valve-assembly, whereupon when force is applied to spread the members 26 and 28 apart, the valveassembly will be forced to dislodged position from the opening |4.

The means shown for actuating the member 28 relative to the auxiliary member 26 are of the hydraulic type, the member being formed of a tubular section 3| screwed on the upper end of a bar section 32. Within the tubular member 3| and concentric therewith, is a tubular section 33 of much smaller diameter than the tubular section 3| and forming therewith an oil storage chamber 34. The tubular section 33 which forms a pump cylinder and is rotatably adjustable for a purpose hereinafter described, bears at its lower end at which it is circumferentially spaced from the section 3|, against the annular ange 35 of the casing 36 of a downwardly opening check valve device screwed into the upper end of the bar member 32 to be unitary therewith.

'I'he top of the chamber 34 is closed by a cover member 31 shown as fastened to the section 3| by screws 38, 39 and 4|), the tubular section 33 extending upwardly through the cover member 31 and having its upper end of reduced diameter affording an annular shoulder 4| against which the cover meanber 31 bears. Leakage along the tubular section 33 is prevented by a packing gland 42 on the cover member 31.

These hydraulic means also comprise a pumping piston 43 reciprocable in the cylinder 33 and operable by means of a lever 44 pivotally connected at 45 between its ends to the upper end of the pumping piston 43 and fulcrumed on a sliding fulcrum 46, to the upper end of a post 41 rising from, and rigidly connected with, the member 3|.

The valve device controlling the inflow of oil from the chamber 34 to the cylinder 33 and in the form of an inwardly opening check valve device is represented at 48 and the valve device which controls the discharge of oil from the cylinder 33 and which is an outwardly opening check valve device, is the valve device hereinbefore referred to, the casing of Which is represented at 36.

The valve device 48 comprises a casing 49 screwed into an opening 5|) in the side wall of the cylinder 33 and olpening at one end into the interior of this cylinder and at its other end, through a port 5|, into the storage chamber 34, and a spring-pressed ball check valve 52 controlling the inlet 5| from the chamber 34.

The valve device for controlling the discharge from the cylinder 33 comprises, in addition to the parts above described, a downwardly opening spring-pressed ball check 53 which controls the inlet 54 of the casing 36.

The side wall of the casing 36 has a port 55 which is closed by the tubular member 33 except when the latter is rotated to a predetermined position in which a port 56 in the side wall of the tubular member 33 registers with the port 55. A stop nger 51 on a ring 58 rigid with the tubular member 33 and cooperating with the screws 39 and 40, determines the selective positioning of the tubular member for registry or non-registry of the port 56 with the lport 55.

d The lower open end of the valve casing 36 opens into a passage 59 in the member 32 communicating with the interior of a nipple 60 screwed into a socket 6| in the member 32 and connected with one end of a flexible tube 62, the other end of which connects with a socket 63 in a nipple 64 having a threaded portion 65 between its ends at which the nipple is screwed into an opening 66 in a lug 61 on the member 26 and located between a pair of lugs 68 provided on the lower end of the member 32; the ends 69 and 10 of the nipple 64 being journaled in openings 1| and 12 in these lugs, the structure thus providing a desirable pivotal connection between the members 25 and 26.

The socket 63 oi the nipple 64 communicates at a port 13 in its side wall with a passage 14 in the member 26 which opens into the bottom of a cylinder 15 provided by the member 26 and in which a piston 16 forming a part of the member 28 is slidable, a spring 11 connected with the members 26 and 28 yieldingly urging the member 28 toward the member 26 to the position shown in Fig. 1 and by full lines in Fig. 4.

As will be understood, each upstroke of the piston 43 causes oil to be drawn from the chamber 34 into the cylinder 33 (the outlet check valve 53 remaining closed) and each downstroke of the piston 43, assuming the tubular member 33 to be in the rotatably adjusted position shown in Figs. 4 and 6 (in which position the ports 55 and 56 are out of registration) causes the charge sucked into the cylinder 33 through the check valve 48, to be forced into the cylinder 15, exerting lift on the piston 16 therein.

A description of a manner of using the device is as follows:

When it is desired to dislodge a valve-assembly, the operator, upon removing the cover plate from the cylinder block and removing the stirrup bracket above referred to from the groove I5, pries the valve head and stem assembly to the position shown in Fig. l, as for example by means of a screw driver inserted between the valve head I8 and the valve seat IG. The operator inserts the dislodging device, through the opening in the top of the cylinder block and positions it at its portions 29 and 30 in the space between the inner end of the valve stem |1 and the plunger 22 as shown in Fig. 1. The positions of the parts of the device as shown in Fig. 1 in which the portions 29 and 39 ilatwise engage each other are those which result from the manipulation of the tubular member 33 from a position in which the stop finger 51 is against the screw 39 (Figs. 4-6) and the ports 55 and 56 are out of registration, to a position in which the stop finger 51 is against the screw 4D (Figs. l and 2) and the ports 55 and 56 are in registration permitting the pumped liquid to ilow back to the storage chamber 34 and the member 28 to assume its lowermost vposition (Fig. 1 and the'full line position of Fig. 4)-which is the desired conditioning of the device after each dislodging operation.

Upon positioning the device between the valveassembly I2 and the plunger 22 as stated, the operator rotates the tubular section 33 counter-clockwise in Fig. 5 to the position therein shown in which the stop finger 51 engages the screw 39, thus closing the port 56 to the port 55. Then by successive operations of the piston 43 oil is forced from the storage chamber 34 into the cylinder 15 to force the piston 16 upwardly and dislodge the valve-assembly.

As will be understood if the force required to be exerted against the valve-assembly to dislodge it is greater than that required to force the spring I9 to bottomed condition, continued pumping of the oil will eventually bottom the spring and exert the necessary force to dislodge the valve-assembly.

One of the highly desirable features of the device is the application of the dislodging force to the valve-assembly along such a path that forces tending to bend a part or parts of the valve-assembling is avoided.

The feature of providing for the pivoting of the member 26 on the member 251 is also of advantage as it permits the use of the device With engines requiring for the introduction of the device into the engine block to the desired position, different angular relationships of the members 25 and 26 to each other.

'While I have illustrated and described a par to the end of thevalve stem of said assembly,

comprising, pressure applying shoes adapted for insertion in a position between the lower end of the valve stem and a relatively stationary part of the engine, one of said shoes being constructed for engagement with said relatively stationary part and the other thereof having a' plate portion for engagement under the end of the valve stem,

ticular embodiment of my invention, I do not internal combustion engine, by pressure applied means mounting said shoes for relative straightline movement for exerting force on the end of the valve stem for forcing the assembly outwardly,. and hydraulic means for causing said relative movement.

2. The combination of claim l wherein the hydraulic means comprises a piston and cylinder, and wherein the shoes are carried by the wall of the cylinder and the head of the piston respectively and the connection of the shoes to said portions includes side brace plates, the brace plates of one shoe nesting within the plates of the other shoe to provide guides against relative rotation of the piston and cylinder.

3. The combination of claim l wherein the hydraulic means comprises a piston and a cylinder, the latter formed with an auxiliary member rigid therewith and a pressure accumulating pump formed with a bar section projecting rigidly therefrom and pvotally connected to said auxiliary member.

i ASA J, TAYLOR.

Images