US2527555A

US2527555A - Mechanism for removing and replacing valves

Info

Publication number: US2527555A
Application number: US647495A
Authority: US
Inventors: John W King; James J Mcnamee
Original assignee: Miles Park Machine & Tool Inc
Current assignee: Miles Park Machine & Tool Inc
Priority date: 1946-02-14
Filing date: 1946-02-14
Publication date: 1950-10-31
Anticipated expiration: 1967-10-31

Description

Oct. 31, 1950 J. w. KING ETAL 2,527,555

MECHANISM FOR REMOVING AND REPLACING VALVES Filed Feb. 14, 1946 2 Sheets-Sheet 1 INVENTOR. JOHN WKING. G a ad. BY JAMES J.MNAMEE Oct. 31, 1950 J. w. KING ETAL MECHANISM FOR REMOVING AND REPLACING VALVES Filed Feb. 14, 1946 2 Sheets-Sheet 2 INVENTOR J OHN W KING IAMESIMNAMEE g flv ta/ i atented Oct. 31 1956 UNITED STATES PATENT oF FIcE- MECHANISM FOR. REMOVING ANo REPLACING VALVES John and James J MoNamee'. Cleveland, Ohio, assignors to Miles Park Machine' t Tool- Ina, Cleveland, Ohio, avcorporation of ,Ohio

- Application February 14, 1946, Serial No. 647,495

This inventionrelates to'a mechanism for removing and replacing the intake and exhaust valves in the head of an internal combustion engine.

One' object of the invention. is to provide an improved mechanism of this. type constructed to facilitate the operation of removing or replacing one or more valves of an engine, whereby both the labor and time required are materially reduced and hence 1 enables engine repairs or service to be economically carried. out.

Another object of the invention is to provide an improved mechanism of thistype having incorporated therein a support for the valve, whereby compression of. the valve spring and release of the valve or its replacement is readily effected.

Another object of the invention is to provide an improved mechanism of this. type constructed to remove or replace both the intake and exhaust valves of any engine where these. valves are alternately disposed out of alinement without movin the engine head.

Another object of the invention is. to .provide an improved mechanismlo-f this type consisting of few parts and capable of adjustment to accommodate valves. havingseat engaging walls of different widths and/r shanks of different lengths.

Other objects of the invention will be apparent {to those skilled in the art to which our invention :relates from the following description taken in ;connection with the accompanying drawings,

wherein }Flg. 1 is a plan view of a mechanism embody-' ing our invention and an engine head in position.

Fig.2 is a section'on the line 2-2 of Fig. 1.

Fig. 3 is a fragmentary sectional view showing the operation of compressing the spring for a valve.

Fig. 4 is a fragmentary section on the line .44 of Fig.2. v

Fig. 5 is a section on the line 5-5 of Fig. 2.

Fig. 6 is a perspective view of an element employed in the assembly for each valve.

Fig. 7 is a sectional view substantially similar to Fig. 2, but showing a modified form of con- .struction.

In the drawings, A indicates an engine head 'of any suitable construction and mounting a plurality of intake valves a and related exhaust valves a. The valve removing and replacing :mechanisrn, indicated as an entirety at l, is adapted to remove or replace one or more of ixthe valves where all thereof are in alinement,

2 Claims. (01. 29 21e but, as shown, it is capable of removing or replacing one or more valves where the valves for each cylinder are disposed in the engine head A at angles to each other, without requiring the head to be moved or repositioned.

Each valveassembly is shown as consistingof a cup member B having a flange b which forms the seat for the outer end of the valve spring C, the inner end of the latter being seated on the adjacent wall of the head A. The shank a of the valve extends through the bottom wall of the member B and the inner wall of the latter .is of conical shape to accommodate a lock D which surrounds the shank a and is provided internally with a rib fitting into. an annular recess formed in the shank a As the lock D consists of two side-by-side separable elements d, d, and fit the, conical wall of the member B, the pressure of the spring C on the latter serves to maintain the elements d, d in position, but upon compression of the spring, as hereinafter set forth, these elements may be inserted in position or removed (see Fig. 3).

The mechanism l comprises the following: 2 indicates as an entirety a frame adapted to be positioned on a table, work bench or other support and consisting of side plates 2a spacedly and rigidly connected together by a pair of

rods

3, 3a, each rod being arranged adjacent corresponding ends ofthe plate 2a to provide an unobstructed spacebetween them. As shown in Fig. l, the frame 2 isof less length than that of the engine :head A, so that the latter may be supported on the plates Zaa-nd shifted endwise thereon where the valves are positioned beyond either or both plates. 4 indicates stops or abutments supported on and projecting upwardly from the plates 2a, against which the head A is positioned. 5 indicates as an entirety a linkage bodily movable endwise of the frame 2 on the frame rods 3,

- 3a, whereby the linkage maybe adjusted into alinement with each valve a, a. In the form of construction shown in Figs. 1, 2, 3, a, and '5, the linkage consists of (a) a link '6 provided at its inner end with a hub 6a" which is rotatably and slidably mounted on the rod 3a, (b) alink having a pivotal connection 1a intermediate its ends with the link Go intermediate the ends of the latter, (0) a link 8 pivotally connected to the inner end of the link land ([1) a lever 19 pivotally connected at its inner end to the link 8, the lever 9 being extended, so that its outer end portion 9a may serve as an operating handle. The outer end of the link 1 is supported on the rod .3 and is free to slide endwise thereof when the linkage is adjusted and also ride on the rod 3 at right angles thereto due to the articulation of the links I5, I, in operating the linkage 5. The link I preferably consists of a pair of spaced bars kc disposed upon opposite ends of the link 6 and inner end of the link 8. The outer ends of the bars Ia: are connected by a bolt I and their inner ends are held in position by suitable cotter pins for the pivot II which connects the bars Ia: to the link 8. Means are provided for holding each valve against downward movement while its spring is being compressed. This means consist of an abutment member carried by one of the links and arranged to engage the valve, so that the valve spring may be compressed relativ to its shank, as later set forth. To provide for the engagement of both valves for each cylinder where the valves are operable at angles to each other, the abutment member is adjustable on the adjacent link. Inthe form of construction shown, the outer end portion of the link 6 is formed with inner and outer inwardly extending recesses I2, I2a, each of which forms a seat for the inner end portion of a valve abutment member I2c. The member I2c preferably consists of a pin shaped to removably fit each recess I2, 12a, and project therefrom, whereby its outer end may serve as an abutment to engage the inner face of each valve a, a, while its spring is being compressed, as shown in Figs. 2 and 3. The abutment member I20 is positioned in one recess when one valve is to be removed or replaced and then removed and positioned in the other recess when the other valve for the adjacent cylinder is to be removed or replaced. The lever 9 is formed with an elongated opening 9?) the side walls of which engage the flange I) provided on the cup member B, so that when the lever 9 is operated to force the member B downwardly relative to the valve shank a and through it to compress the valve spring C, the locking elements d, d, can be removed 0r replaced, as shown in Fig. 3.

The pivotal connection between the link 8 and lever 9 is adjustable to adapt the linkage to engine heads which vary in height and/or valves the seat engaging walls of which vary in thickness or their shanks vary in length. To provide for this adjustment, the link 8 is provided throughout a portion of its length with screw threads Ba on which an internally threaded collar I3 is mounted. The collar I3 consists of an elongated round section I3a provided at its lower end with an annular wall I31) and at its upper end with a ring I30, which provides an annular wall spaced from the wall I3b. As shown, the round section I3a of the collar I3 projects through an opening 90 formed in the inner end of the lever B and engages the walls thereof to pivot the link 8 and lever 9 together. The opening 90 is elongated to permit free pivotal and rocking movement between the collar I3 and lever 9. BY preference, the inner wall of the collar section I3a is threaded for engagement with the screw threads 8a on the link 8 and its upper end'is extended and threaded into the adjacent end of the ring I3c, so that the section I3a and ring I30 may be connected with the section I3a within the opening 90.

I4 indicates a support mounted at its opposite ends of the plates 2a and in position below the valves a, a. The support I4 serves to support the valve or valves to be replaced While the linkage is being positioned; also, when a valve is released from the lock D in the operation of removing it, the valve is allowed to drop or gravitate onto the support I4 and stored thereon while other valves are being released for removal. The support I4 is seated in recesses I4a formed in the plates 2a, so that its upper surface is substantially flush with the top edges of the plates and the sides of the recesses maintain the support H in position.

In operation, where a valve is to be replaced or assembled in the head A, the latter is positioned on the frame 2 with the valve shank in its guide sleeve and the valve placed on support I4. The linkage 5 is moved along the frame 2 in alinement with the valve, which is then raised and the abutment member I3c engaged therewith; the valve spring C and cup member B are assembled on the valve shank (1 and the lever 8 is swung into engagement with the flange b of the member B, and forced downwardly to compress the spring C (see full lines in Fig. 3), whereupon the locking elements d, d, may be inserted in the cup member B (see Fig. 2). In removing a valve, these operations are reversed. It will be observed, in carrying out either operation, that the connection of the lever 9 with the link 8 may be adjusted along the latter so that the force applied to each spring C to compress it will be opposed by the abutment I2c substantially axially of the valve shank a as well as axially of the valve spring C. Accordingly, the operation of compressing each spring may be efiected in a quick and ready manner and danger of the spring buckling or being distorted is eliminated.

Fig. 7 illustrates a modified form of linkage, indicated as an entirety at 5', which differs from the form of construction shown in Figs. 1, 2 and 3 in that the link I is omitted, so that the link 8 is pivotally connected directly to the link 6, as shown at 62:. The linkage 5' is operated similar to that above described.

To those skilled in the art to which our invention relates many changes in construction and widely difiering embodiments and applications of the invention will suggest themselves without departing from the spirit and scope of the invention. Our disclosures and the description herein are purely illustrative and are not intended to be in any sense limiting.

What we claim is:

1. In mechanism of the class described, the combination with a frame arranged to support an engine'head and provided with a rod extending from end to end thereof and in a plane below the head, of a link provided with an inner end and an outer end, said link being rotatably and slidably mounted at its inner end on said rod for alinement with each of the valves on the head and extending transversel of said frame below the head, the outer end of said link being provided with a member arranged to engage a valve and form an abutment therefor while the adjacent valve spring is being compressed, a second link provided with a lower end and an upper end, said second link being pivotally connected at its lower end to said first mentioned link inwardly of the mounting thereof on said rod, and a lever pr'ovided'with an inner end and a handle at its outer end portion, said lever being pivotally connected at its inner end to the upper end portion of said second mentioned link, said lever intermediate its ends being formed with an opening to permit the adjacent valve shank to extend therethrough and at opposite sides of said opening said lever being arranged to engage the abutment for the outer end of the adjacent valve spring, whereby. operation of said lever downwardly about its pivot in opposition to said abutment member serves to compress the valve spring relative to the valve shank.

2. In mechanism of the class described, the combination with a frame adapted to support an engine head and provided with parallelly related spaced rods extending from end-to-end thereof in a plane, below th head, of a pair of transversely disposed links each provided with an inner end and an outer end, said links being disposed below the head and pivotally connected together intermediate their respective opposite ends, the inner end of one of said links being rotatable and slidable on one of said rods and the inner end of the other link having sliding engagement with the other rod, whereby said links may be alined with each valve in the head, the outer end portion of one of said links being provided with an abutment arranged to engage the adjacent valve while its spring is being compressed, a separate link provided with a lower end and an upper end, said separate link being pivotally connected at its lower end to the other one of said first mentioned links, and a lever provided with an inner end and an outer end, said lever being pivotally connected at its inner end REFERENCES CITED The following references are of record in the file or" this patent:

UNITED STATES PATENTS Number Name Date 1,480,513 Daniken Jan. 8, 1924 1,849,538 Bernitz Mar. 15, 1932 2,173,398 Michener et a1. Sept. 19, 1939 FOREIGN PATENTS Number Country Date Great Britain June 28, 1928