US1463709A - Valve-spring lifter - Google Patents

Description

muy 31.; 192s, 1,463,709

F.. 1r. MARTIN v VALVE SPRING LIFTER Filed Jan. 5, 1922,

I N VEN TOR:l

TTORNEYS,

Patented .lully 3l, l923.

narran raras aan FREDERICK T. MARTIN, OF MERGN, PENNSYLVANIA, ASSIGNOI-t kOF ONE-HALF T JOHN J'. GALLAGHER, OF MER-ION, PENNSYLVANA.

VALVE-SPRNG LIFTER.

Application filed January 5, 1922. Serial 1\To.i527,073.

To all whom t may concer-a:

Be it known that l, FREDERICK T. lili-mun', a subject of Great Britain, residing in Merion, county of Montgomery, State of Pennsylvania, have invented certain new and useful lmprovements in Valve-.Spring Lifters,

of which t-he following is a specification, ref-` erence being had to the accompanying drawings.

My invention relates to tools, ordinarily known as valve spring lifters, useful in effecting the removal of poppet valves of automobile motors for cleaning, grinding', replacement or for ot-her similar purposes.

The removal of these valves, with tools heretofore available, has been an extremely tedious task firstly because of the difficulty of actuating such tools within the restricted. proportions of the valve housings, and secondly, because of the diificulty of access to the retaining pins whereby the valve springs are held in compression, on account of the presence of the tools themselves.

The main objects of my invention are to 25 overcome the various difculties just pointed out, and to malte it possible to remove a number of motor valves at the one time.

One way in which these desiderata may be secured will become readily apparent from the detailed description of a typical embodiment of my invention which follows:

ln the drawings, Fig. l is a perspective view of a valve spring lifting tool conveniently embodying my invention.

Fig. Il is a plan view of one element or part of the tool whereby the ends of the valve springs are engaged, a portion of the structure being broken away and shown in section for convenience in illustrating certain important details to better advantage.

Fig. IH is a sectional view taken as indicated by the arrows IIL-IH in Fig. ll.

Fig. lV is a section taken as indicated at IV-lV in Fig. I and showing, in plan. the details of the ratchet mechanism associated with the actuating hand lever of the tool.

Fig. V is a fragmentary sectional view showing more especially the details at the lower end of the jack screw whereby tht valve spring engaging element aforesaid it adjusted.

Fig. VI shows the manner in `which the tool is used in removing the valves of a typical internal combustion motor.

Referring first to Fig. l of the drawings. the tool as there represented, will be ob-l served to comprise an element l capable of engaging several. valve springs at one time; a gael; screw 15 whereby said element can be adjusted relative to a lined portion of the motor from which the valves are to be removed; and an actuating hand leverlG hav ing associated with it, a ratchet mechanism l? whereby the screw may be rotated in opposite directions under selective control. lllhe element l has notches 2 (in the present instance two in number) so that it may clear the stems of the valves in the course of being applied, and, in order that it may be exi tended and contracted for adaption to different valve spacings, is constructed of several relatively movable parts or sections which include a central section 3 and companionlend sections 4l, e'. T he latter sections respectively contain the notches Qf-EZ aforesaid and are appropriately recessed as at 5, 5 to accommodate and at the same time to overlap the central section so as to be supported thereby, see Fig. HI. rThe sec-` tions l, e are further cut away as at 6, 6 to clear a thickened portion 7 at one end of the section 3, and again at 8-8 to clear the.

jack screw l5. Adjustment of the sections il, l is rendered independent by provision of individual screws 9-9 which engage within a threaded bore l0 of the thickened portion 7 of the section 3. The shanks of the screws 9-9 are freely rotatable within the sections, 4, l but held against longitudinal displacement through the engagement of collars 11H11 and Cotter pins 12-12 with shoulders 12B- i3 and 14a-14 respectively of said sections.

rlhe actuating lever 16 is made in two parts 18-l9 joined by a pivot pin 2O as clearly shown in Fig. l. This construction allows vertical swinging of the part 19 to different angular positions as a' result of which manipulation in restricted quarters is greatly facilitated. rlhe part 18 of the hand lever is engaged, with capacity for independent movement, between collars 2,1-23 at the lower end of the jack screw. The collar 2l is preferably formed integral with the jack screw and its lower face is con` caved as shown at 22 in Fig. V for a purpose which will be explained later. The collar 23 is notched to serve as a ratchet wheel tlO posed cam post 30.

of the ratchet mechanism 17 previously referred to. This mechanism further includes pawls 25-26 which are pivoted to the part 18 of the hand lever 16, see Figs. and lV. Said pawls have a helical spring 27 span-ned between them so that their inwardly pro-- jecting semicircular lugs 28- 29 are yields ingly held in engagement with an inter- Said post has appropriate notches 31-32 adapted to respectively receive or accommodate said lugs. Thus when the cam post 3() is turned to the position shown in Fig. 1V by means of the handle 33 provided lor this purpose, the lug 29 slips into the recess 32 and allows the pawl 26 to become active upon the ratchet collar 23, while the pawl 25 is shifted to idle position by engagement ol its lug 28 with the concentric portion of said post. Similarly, when the handle 33 is turned clockwise to a position at right angles to that shown, the pawl Q5 is rendered active simultaneously with retraction of its companion 26.

Referring now to Fig. Vl oi' 'the drawings wherein I' have shown the manner in which the valve spring lifter is used, 35 designates a portion of an internal combustion motor with two of its adjacent poppet valves 36-37 for controlling the fuel inlet 38 and exhaust outlet 39 respectively of one of the motor cylinders. The stems oit the valves are shown as being slidably guided in bearing-s AMP-40, and are engaged from beneath by plungers Lll-ll in turn actuated by a usual type of cam shalt, not shown. The plungers l1- fil move in bearings @w+-t2 secured in place by a retention stirrup 43 fitted to a stud bolt 44k let into the motor casing. The valves 36-37 are normally held in closed position by springs l5-et5 compressed between cup flanges 46S-46 of the bearings lO--tO and cup washers 47-47 secured against displacement by retaining pins .tl-L18. In applying the valve spring liifter, the notched element 1 is engaged beneath the cup washers L7-el? and the jack screw 15 placed with its collar 21 engaged over the top end of the stud bolt 14 of the retention stirrup L18. In motors where such retention stirrups do not exist, the collar may be supported directly by the motor casing. lt adjustment of the element 1 Jfor proper adaptation of its notches 2-2 to the spacing of the valve should be found necessary, this may be effected through aid of the screws 9 9 as already understood. The ratchet mechanism 17 is next properly set and the jack screw 15 subsequently rotated by means of the hand lever 16 until the cup washers 457-47 are sui'liciently elevated, asl shown, to permit removal of the retaining pins 1S whereupon the valves may be readily withdrawn and again replaced as may be required in the course of cleaning, grinding,

or for any other purpose. Subsequent removal o1" the tool is etlected simply by reversing the ratchet mechanism and movement of the actuating or" the hand lever as before. I

It is to be particularly observed that my improved valve spring lifting tool eX- tremely compact and that its construction is such that it does not, by reason of its presence7 interfere with the accessibility oi the retaining pins 48.

Having thus described my invention, l claim:

1. A tool of the character described comprising relatively movable means for adaptation to diderent valve spacings, and means for forcibly and simultaneously moving said means subsequent to adaptation, for the purpose set forth.

2. A tool of the character described comprising an element having a multiplicity 'of notches for clearing the stems of a series of valves in being applied against the ends of the valve springs and constituted of relatively movable segments so as to be eXtensible for adaptation to diierent valve spacings; in combination with means for moving said element to simultaneously compress the va ve springs.

3. A tool for the character described comprising an element for engaging the ends of two acent valve springs at one time; constituted ot two members respectively notched to clear the stems-oll the valves and relatively slidable for adaptation to different valve spacings; in combination with means for moving said elements to simultaneously compress the valve springs.

4. A tool of the character described comprising an element for engaging the ends of two adjacent valve springs at one time, constituted of a central member, and two associated relatively slidable, side extension members respectively notched to clear the stems of the valves for adaptation to dillerent valve spacings, in combination with means operative upon the central member of the element aforesaid to effect simultaneous compression of the valve springs.

5. A tool ol tie character described comprising anelement for engaging the ends of two adjacent valve springs at one time, constituted oi" a central member, two associated rela-tively slidable, side extension members respectively notched to clear the stems of the valves, and means whereby said extension members may be independently adjusted with respect to said central member for adaptation to diilerent valve spacings; in combination with means operative upon the central member of the aforesaid element to effect simultaneous compression of the valve springs.

6, A tool of the prising an element character described comor'engagmg the ends ot' two adjacent valve springs at one time7 constituted' ot a central member, two associated reletirely slideble, side extension members respectively notched to clear the stems of the valves3 end screws whereby the extension members may be independently adjusted With respect to the central member for adeptntion to ditferent valve spacings; in oombna'ion with means operative upon the central member of the element aforesaid to etl'ect simultaneous Compression of both valve springs.

7. A tool o1- the character described comprising an element for engaging the end ot' e Valve spring; :L ack screw for moving the .aforesaid element to compress the spring; and an actuating handle for rotating the jeck screw capable of being,` swung to different angular positions in a direction perpendicular to that of rotation.

8. A tool of the character described comprising s central member,l relatively movable Work engaging members carried thereby for adaptation to different valve spacings, e threaded means Carried by the central member to move said work engaging members, and means engaging the central member to forcibly move the seme, for the purpose set forth.

ln testimony whereof, 'nave hereunto signed. my neme at Philadelphia, Pennsylvenina `this 3rd dey Jenuary 1922.

FREDERICK T, MARTIN.

Witnesses:

JAMns H. BELL, E. L. FULLERTON.

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