US2632238A

US2632238A - Valve removing tool

Info

Publication number: US2632238A
Application number: US170539A
Authority: US
Inventors: Dyck David
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-06-27
Filing date: 1950-06-27
Publication date: 1953-03-24
Anticipated expiration: 1970-03-24

Description

March 24, 1953 DYCK 2,632,238

VALVE REMOVING TOOL Filed June 27, 1950 INVENTOR. DAVID DYCK BY 77km 6mm v mm AT TO D N EYS Patented Mar. 24, 1953 UNITED STATES PATENT OFFICE VALVE REMOVING TOOL David Dyck, Hudson Bay, Saskatchewan, Canada Application June 27, 1950, Serial No. 170,539

2 Claims.

vide a valve removing tool which is simple in structure and cheap to manufacture.

Other objects of this invention will become apparent from consulting the following specification in conjunction with the drawings.

In the drawings:

Figure 1 is a side elevational view with parts in section of the valve removing tool of the present invention in its contracted position as applied to a valve assembly at the beginning of its removal from a block of an internal combustion engine.

Figure 2 is a side elevational view of the tool as applied in Figure l but showing the tool in its extended position and the valve assembly at the end of its removal from a block of an internal combustion engine.

Figure 3 is an enlarged perspective view of the valve disassembling tool of the present invention, with parts broken away and in section.

Referring now more particularly to the drawings wherein like reference numerals have been used throughout the several views to designate like parts, there is shown the valve removing tool of the present invention, generally designated by the numeral [0, as applied to the valve assembly I l, which is seated in the block l2 of an internal combustion engine.

The block 12 of the internal combustion engine, which is generally illustrated as the Ford type, includes a pair of confronting bores l4, [5 which are readily accessible to the mechanic upon removal of the cover of the block l2, not shown. Disposed within the bores I4, I5 is a conventional valve assembly II which includes a bushing I6 disposed within the bore l4 and a valve stem I7 reciprocable in the bushing l6 and carrying a valve head l8 which is normally urged into seating engagement with the seat l9 by a valve spring 20, the spring being circumposed about the stem l1 between a shoulder 24 on the bushing l3 and an abutment 2| on the lower end of the stem I1.

Disposed within the bore I5 in aligned abutting relation with the stem 11 is a cam follower 25 which is reciprocated by a cam 22 carried by the cam shaft 23 of the internal combustion engine.

The aforementioned structure of the valve assembly II and the cam actuating mean is entirely conventional and forms no part of the valve disassembling tool of the present invention, which includes a pair of arms 30, 3| disposed in spaced confronting relation with respect to each other and pivotally connected together at one end thereof for movement toward and away from each other. Each of the arms 30, 3| is of like structure and includes a

shank

32, 33 having an inwardly extending

web

34, 35 carried at one end thereof, and an inwardly converging

force applyin member

36, 31 carried at the other end thereof. The free ends of the

force applying members

36, 31 are offset with respect to the main portion thereof and form bearing plates. 38, 39.

It is to be noted that the respective webs 34,

' 35 are disposed at right angles with respect to the

shanks

32, 33 and are arranged in end to end abutting relation with respect to each other, the abutting ends of the

webs

34, 35 being rounded as indicated at 40, 4|.

Disposed exteriorly of the arms 30, 3| and operatively connected thereto is an arcuate leaf spring 42, the spring having one end extending toward the web 34 of the arm 30 and secured thereto, and having the other end extending toward the web 35 of the arm 3| and secured thereto. The sprin 42 normally biases the

confrontin bearing plates

38 and 39 into abutting engagement with respect to each other.

The respective aligned

webs

34, 35, the

spaced shanks

32, 33 and the converging

force applying members

36, 31 cooperate to form an elongated longitudinally extending opening 43 in which is slidably received an actuating means, generally designated by the numeral 44 for urging the

bearing plates

38, 39 out of bearing engagement with respect to each other.

The actuating means 44 includes a plunger 45 disposed longitudinally of the arms 30, 3| and slidably received and supported in aligned spaced apertures 46, 4'! provided in the confronting ends of the

webs

34, 35 of the arms 30, 3| and in the leaf spring 43 respectively. One end of the plunger 45 is disposed exteriorly of the arms 30, 3| and the spring 43 and is provided with a finger piece 48. The other end of the plunger 45 is disposed within the opening 43 and carries a spherical ball 49 which is adapted to bear against the adjacent inner faces of t e force applying

members

36, 31. Accordingly as the plunger 45 is moved longitudinally of the opening 43, the ball 49 urge the force pp y members 36, 3'! away from each other.

Circumposed about the plunger 45 within the opening 43 is a coil spring 50, the spring having one end bearing against the adjacent inner faces of the

webs

34, 35 and having the other end bearing against the ball 49. The spring 59 normally urges the ball 49 into bearing engagement with the abutting faces of the

bearing plates

39, 39. It is to be noted that when the ball 49 is disposed intermediate the

bearing plates

38, 39, as clearly illustrated in Figures 2 and 3, forces applied normal to the plates will not urge the plates back into abutting engagement with each other. Accordingly the bearing plates will be maintained in spaced apart relation with respect to each other until the ball 49 is retracted from between the plates.

In actual use, the cam shaft '23 is rotated until resulting in the raising of the valve head l8 out of seating engagement with the valve seat l9. The valve head I8 is then held in this position, as indicated in Figure 1, while the cam 23 is being rotated to the full line position shown therein, whereupon the

bearing plates

38, 39 of the valve disassembling tool it can be inserted between the confronting ends of the valve stem H and the cam follower 2i. The cam shaft 23 is once again rotated until the lobe of the cam 22 lifts the cam follower 25. During the last named rotation an upwardly directed force is exerted on the bushing 16 through the cam follower 2l, the

bearings plates

38, 39, and the valve stem and spring. This upwardly directed force partially urges the bushing out of the bore i4.

Upon once again rotating the cam shaft 23 to the full line position shown in Figure 1, the cam follower 2| will slide downwardly and the resiliency of the coil spring 50 will urge the ball 49 into its position intermediate and bearing against the confronting faces of the

bearings plates

38, 39.

I6 is urged out of the bore [4. Accordingly the valve assembly I I can be removed with speed and "facility and be replaced and repaired.

Although only one embodiment Of the invention has been shown, numerous other modifications may be made without departing from the spirit of the invention as set forth in the appended claims.

What I claim is: 1. A Valve removing tool comprising a pair of arms arranged in spaced confronting relation, a web positioned transversely of each of said arms adjacent one end of said arms and fixedly secured thereto, said webs facing and abutting each other, a bowed leaf spring arranged longitudinally exteriorly of and straddling said webs and having its ends fixedly connected to said webs, a rod positioned longitudinally of and between said arms and having one end slidably supported in the abutting point of said webs and in said leaf spring and projecting beyond said left spring, a ball positioned between said arms and spaced from said webs and fixedly secured to said rod, a bearing plate on the other end of each of said arms, said plates facing each other and engaging said ball, a spring operatively connected to said rod for biasing said ball toward its position of engagement between said bearing plates, and a head on the projecting end of said rod abutting the leaf spring when the ball is in its position of en agement between said bearing plates.

2. A valve removing tool comprising a pair of arms arranged in spaced confronting relation, 2. web positioned transversely of each of said arms adjacent one end of said arms and fixedly secured thereto, said webs facing and abutting each other, a bowed leaf spring arranged longitudinally exteriorly of and straddling said webs and having its ends fixedly connected to said webs, a rod positioned longitudinally of and between said arms and having one end slidably supported in the abutting point of said webs and in said leaf spring and projecting beyond said leaf spring, a ball positioned between said arms and spaced from said Webs and fixedly secured to said rod, a bearing plate arranged at an angle with respect to each arm and fixedly secured adjacent the other end of said arms, said plates facing each other and engaging said ball, a spring operatively connected to said rod for biasing said ball toward its position of engagement between said bearing plates, and a head on the projecting end of said rod abutting the leaf spring when the ball is in its position of engagement between said bearing plates.

DAVID DYCK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Meyer Oct. 9, 1945