US1314264A

US1314264A - Valve-cage-lifting tool

Info

Publication number: US1314264A
Authority: US
Publication date: 1919-08-26
Anticipated expiration: 1936-08-26

Description

E. M. HEM PHILL.

VALVE CAGE LIFTING TOOL.

APPLICATION FILED FEB. 1. 1919.

1,314,264. Patented Aug. 26,1919.

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UNITED STATES PATENT OFFICE.

ELI M I-IElVfPI-IILL, 0F MOUNDSVILLE, WEST VIRGINIA, ASSIGN OR OF ONE-HALF TO.

G. W. MCCRACKEN, OF MOUNDSVILLE, WEST VIRGINIA.

VALVE-CAGE-LIFTING- TOOL.

Specification of Letters Patent.

Patented Aug. 26, 1919.;

Application filed February 7, 1919. Serial No. 275,578.

To all whom it may concern:

Be it known that I, ELI M. HEMPIIILL, a citizen of the United States of America, and resident of Moundsville, county of Marshall, and State of West Virginia, have invented certain new and useful Improvements in Valve-Cage-Lifting Tools; of which the following is a specification.

This invention relates to a lifter for the valve cages of internal combustion engines.

The primary object of the invention is to providea simple,'in'eXpensive and efficient tool whereby the valve cages of motors of the valve-in-head type may be readily with- A further object is to provide a tool of the character mentioned having a lifting yoke which is readily shiftable to render thebar or handle a lever of either the first or the'second class.

A still further object is to provide a device which is designed not only as a lifter for valve cages, butalso as a tool by means of which the usual rocker arm may be raised outof engagement with the cam-rod, there- 'by'to free the valve and valve-cage.

With these and other objects in view, the invention resides in the features of construction which Willhereinafter be fully describmember;

Fig. i is a vertical section of an engine cylinder of the valve-in-head type, illustrating the application of the invention as a cage lifter, with the bar employed as a lever of the first class engage the valve-spring 6.

washer 8 which is held in place by such pin or key.

To effect removal'of the valve 4 or to gain access to the interior of the cylinder 1, the valve cage 2 must be withdrawn; To preliminarily free said cage for withdrawal the usual rocker-arm 9 pivoted upon a support, as 10, must be shifted or swung from its operative position in which one end seats upon the end of the valve stem 5 and the other end upon a cam-rod 11; and then the sleeve-nut 3 must be turned out of threaded engagement withthe cylinder.

Due to accumulation of carbon and like foreign matter between the walls of the cage and the cylinder; the cage frequently becomes stuck, or so firmly cemented in its seat that it effectually resists withdrawal except under the application of extraordinary force. Various forms of tools heretofore employed to accomplish the withdrawal of such sticking or dillicultly removable cages either are inadequate for the purpose or are objectionable in that they tend to bend or otherwise injure the valve stem. The objectionable features of tools of this class are overcome by the dcvice shown in the drawings, in which the numeral 12 indicates a bar or lever which is preferably of rectangular form in cross section and which carries at one end thereof a yoke 13 designed to Said yoke. is made of a single piece of material and comprises a pair of similar oppositely disposed arms 18 which are terminated attheir ower ends by inturned beveled hooks 13 which are designed for introduction between the coils of the valve spring and which are separated a distance at least'equal to the diameter of the 'valve stem so that the latter may be received there'between, as shownin Figs. 2 and Said arms are united by'a cylindrical stem 13 which rests upon the top surface of the lever' 12 and upon which the yoke has free swinging movement with respect to said lever.

The yoke 13 is shiftably disposed in alongitudinally extending channel or slideway 14 provided between

upright lugs

15 and 16 formed on the upper face of the lever and is retained in said slideway by suitable overlying means, as by aplate'17 having its opposite ends attached to said lugs. The foremost lug 15 is located closely adjacent to the front end ofthe lever and is adapted to rcceive the stem 13 of the yoke thereagainst when the tool is used for withdrawing valve cages,with the lever employed as a lever of the first class, as shown in Fig. 4. The lug 16 is spaced from the lug 15 the distance necessary to permit theyoke to occupy proper position when the lever is employed as a lever of the second class, as shown in Fig. 5, this use beingfrequently desirable in, close places or when the position of the engine cylinder is such that free operation of the lever as'a lever of the first class is interfered with, as when the cylinder is located close to the dash of an automobile.

.In practice, when the cylinder is readily accessib1e,the yoke 13 is moved into seating relation to the lug 15 and, with the under side of the lever disposed, as shown in Fig. 4:, in seating relation to the. closely adjacent rocker arm 9 or to the support 10, as may be most convenient; The yoke is then swung into a position wherein the hooks 13 enter between two adjacent coils of the spring 6. Relatively small power applied downwardly to the outer end of said lever will result in such a force being applied to the spring and, through the latter and the intermediate parts to the valve cage 2, as will readily oyercomethe most obstinate resistance offered to the withdrawal of such cage. As. is obvious, due to the fact that the yoke is free to swingon its support, a straight vertical pull is at all times exerted in which there is no tendency to bend or otherwise distort the valve stem. V

When free movement of the tool would otherwiselbe interfered with, the yoke is movedback along the slideway 14: toward or against the lug 16, and, withthe front end of the lever fulcrumed upon the rocker-arm 9 or upon the support 10, as shown in Fig. 5, the yoke is swung into the position wherein its hooks engage the spring; whereupon elevation of the outer end of the lever will accomplish the unseating of the valve cage.

Preliminary to efiecting the withdrawal of the cage in the manner hereinbefore de-.

scribed the rocker arm 9 must of course be freed from engagement with the valve stem 5. To provide for such disengagement of the rocker arm by means of the same tool by which the valve cage is thereafter withdrawn, I rigidly mount upon the lever 12at a suitably spaced distance from the outer its'support 10 and the said outer end of the lever is'fulcrumed either upon said rocker arm or said support. A slight elevating force then applied to the free end of the tool will suffice to disengagev fromthe cam rod 11- the outer end of the rocker arm, which may then be slightly shifted .in a lateral direction to remove'said end from overlyingrelation to said cam rod, whereupon said rocker arm 1s permitted to gravltate to an incllned pOSl tion wherein its inner end is withdrawn from overlying relation to the valve cage. What is claimed is 1. A valve-cage liftingtool comprising a lever provided adjacent to one end With a longitudinal slideway, and a lifting yoke carried in said slideway, said yoke consistlng of a horizontal stem and pair. of divergent downwardly extendlng arms,;

said arms being provided with inwardly directed hook terminals, said stem being slid I ably disposed in said slideway and having pivotal relation to saidilever whereby's'aid.

yoke occupies vertical position irrespective of the position assumed bysaid lever. j

2. A valve-cage lifting tool comprising'a lever provided adjacent to one end :with a longitudinal slideway, and a. lifting yoke carried in said slideway, said yokeconsist-- ing of a horizontal stem and a pair of divergent downwardly extending arms, said arms being provided with inwardly directed hook terminals, said stem being slidable in said slideway to render said lever, accord ing to its position onthe latter, a lever of either the first or'second class.

.3. A valve-cage lifting tool comprising a lever provided adjacent. to one end with a longitudinal slideway, andga lifting yoke' carried in said slideway, said yoke consist ingtof a horizontalstem and a pair of divergent downwardly extending arms, said arms being provided with inwardly directed hook terminals, said stem being slidable in said slideway to render said lever, accord- .ing to its position on the latter, a lever of either the first or second class, said yoke be ing free to swing on said lever so that'it occupies vertical position irrespective of the inclination of said lever.

4. A valve-cage lifting tool comprising 'lever having on its upper face adjacent to one end thereof two upright lugs, one located rearward of and at a spaced distance from the other to provide an intermediate slideway, a member overlying said slideway and attached to said lugs, anda valve-spring engaging yoke movable in said slideway, said lafo yoke comprising an intermediate member and a pair of integral divergent arms, said intermediate member being seated on said lever in said slideway and having free pivotal movement on its seat, and said arms being terminated by inwardly directed hooks.

5. A valve-cage lifting tool comprising a lever having on its upper face adjacent to one end thereof two upright lugs, one located rearward of and at a spaced distance from the other to provide an intermediate slideway, a member overlying said slideway and attached to said lugs, and a valve-spring engaging yoke movable in said slideway, said yoke comprising a cylindrical intermediate member and a pair of oppositely disposed divergent downwardly inclined arms with inturned hook terminals, said intermediate member being seated on said lever in said slideway and having free pivotal movement on its seat, said lever being adapted to serve as a lever of the first class when said yoke occupies an advanced position in said slideway and as a lever of the second class when said yoke occupies a retracted position.

In testimony whereof, I aiiix my signature in presence of two subscribing witnesses.

ELI M. HEMPH'ILL. Witnesses:

EDWARD L. EMBLEN, H. I. FREY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. 0.