US1613015A - Valve lifter - Google Patents

Description

Jah. 4, 1927. 1,613,015

- I e. 'BLUM VALVE LIFTER Filed July 24. 1925 aawahw @aawzw;

Patented Jan. 4, 1927.

STATES I GEORGE BLUM, or AKRON, IOWA.

VALVE LIFTER.

Application filed July 24, 1925.

My invention relates to a valve lifter of the tongs type, and has for its primary object to provide a valve lifter which will greatly facilitate the removal of the valve 7 pin.

Another object of my invention is to provide a valve lifter which is of simple, durable and inexpensive construction.

More specifically, my invention is embodied in a valve lifter having jaws offset to one side of the tongs portion of the lifter, and in which the Valve rod receiving slot is parallel to and spaced entirely to one side of the tongs, whereby the valve lifter may be inserted into the valve spring casing directly from the front and perpendicular to the side of the engine without obstructing access to the valve rod and valve pin.

Another object is to provide such a valve lifter having features of construction designed to render the offset aw members of suitable strength and stability.

A still further object is to provide a novel latch for the'valve lifter handles.

lVith these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claim and illustrated in the accompanying drawings, in which:

Fig. 1 is a side View of the valve lifter, parts being broken away to better illustrate the construction.

Fig. 2 is a plan view of the same. Fig. 3 is a detail sectional view, taken on the line 33 of Fig. 2, illustrating the latch. Fig. 4 is a perspective view showing the valve lifter in engagement with the valve spring.

Fig. 5 is a detail sectional view taken as indicated by the line 5-5 of Fig. 4.

Many types of valve lifters have been devised for compressing valve springs to allow removal of the valve pin when it is desired to disassociate the valve from the valve spring of an internal combustion engine, and of these the simplest, most effective and most satisfactory type has been the tongs type. The commonest form of tongs valve lifter is made of sheet metal having integrally pressed jaws formed at one end of the tongs, which are designed to engage the valve spring and push rod boss, respectively.

Serial No. 45,749.

In all of such lifters, however, the slot in the jaws is aligned with, or substantially aligned with, the handle or tongs portion of the lifter, and in using the lifter the mechanic must either insert the lifter at an angle to the face of the engine, or rotate it around the valve rod as an axis until it is disposed at such an angle in order that the valve pin may be readily grasped.

In most types of internal combustion engines the structure of the valve spring chaniber or casing is such that it is diflicult to insert the lifter at an angle, especially in the case of those valves which are situated in the extremity of the valve spring chamber compartments, of which there are generally several. In many cases the insertion of the lifter requires a certain amount of pressure, and it is much more convenient to insert the lifter directly from the front for that reason.

In most cases the valve lifter jaws do not obtain such a firm purchase against the respective objects as to insure stability against buckling of the lifter or wobbling laterally, due to the pressure of the spring which is being lifted. Therefore, while the spring is being lifted, it is desirable to have the handles of the lifter in a position where they can be most readily secured by a firm grip of the operator, which position is perpendicular to the side of the engine.

It is also unsatisfactory to attempt to rotate the lifter after the spring has been raised because of the tendency of the lifter to buckle under the pressure of the spring, and for the jaws to thereby lose their purchase.

It will be seen, therefore, that a lifter in which the tongs or handle portion does not obstruct access to the valve pin in the direc tion parallel to the handles is a decided improvement over types of lifters heretofore in use.

My improved lifter comprises an upper and lower tong member, which I will indicate by reference characters A and B, respectively. Each of the members, A and B, is formed of heavy sheet metal, having the short lever portions, 10, and the long lever portions or handles, 11.

In order to gain strength the tong members are channeled, as shown in Fig. 3, and the handle portions, 11, are rolled further lit;

near their ends into tubular form, as shown in Flg. 4.

At the ends of the short lever portions, 10, the metal of the tongs is shaped to form jaw members, 12 and 13, each of which has a depressed face, 14. Around the edges of the jaw members the metal is turned down so as to form along the straight sides of the jaw members an upstanding channeled ridge, 15, and along the curved side or projecting side thereof a channeled ridge, 16, which is.

inclined gradually from the portions, 10, of the tongs to the forward ends of the jaws.

(See Fig. 5.)

By thus inclining the ridge or head, 16, I find that a lateral support is given to the jaw member which prevents the member from bending under the strain imposed upon it by the lifting of a spring, and renders the entire structure substantial and rigid.

In the upper jaw, 12, is a valve rod ceiving slot, 17, and in the lower jaw, 13, is a somewhat larger slot, 18, to accommodate different shapes and sizes of push rods.

Each of the tong members is provided with a pair of wide, integrally-formed, spaced ears, 19, those of one tong member being inserted within those of the other, and the tongs being thus pivoted together by means of a rivet, or the like, 20.

By forming the ears, 19, of considerable width and depth and overlapping them to the extent shown in Fig. 3, the tendency of the two tong members to twist sideways under the pressure of the springs exerted against the offset jaws will be effectively opposed.

I provide a. latch member to maintain the tongs in open relation after a spring has been raised, which comprises a strip of metal, 21, having an end looped back upon itself to form the loop, 22, which is closed by means of a rivet, 23. The other end of the strip, 21, is hooked, as at 24-, to engage the lower handle member, 11. The loop, 22, is received over the upper handle member, 11, and is journaled upon the tubular portion thereof.

An intermediate hook, 25, is formed of a lip of metal struck up from the central portion of the strip, 21, and when the tongs are used to compress aspring which requires to be raised to a considerable height, the jaws may be held at a position more open than that shown in Fig. l, by means of the hook, 25.

I find that the latch is a very simple and effective method for locking the handles together. It can be readily manipulated by the same hand which grasps the handles of the tongs, the thumb being used to urge the hook in the direction indicated by the arrow, 26, and the forefinger engaged against the point of the hook, 25, serving to disengage the latch by moving it in the direction indicated by the arrow, 27, in Fig. 8.

The hooks, 25 and 2e are sufiicient to i re the necessary variation in locking positions of the lifter, and by manipulating the hook with the thumb and forefinger as described, the latching of the lifter in open position is very conveniently accomplished.

In Figs. 4 and :3 I have sho spring being lifted by the upper aw of i" lifter, the spring being shown at 2? ti valve stem at 29, the spring washer 3 and the valve )in at The jaw of 'th lifter has been inserted in a direction erpendicular to the face of the engine, the tongs portion of the lifter being disposed entirely to one side of the valve-sling, as shown, the valve stem having been retated to position where the valve pin, 31, extends parallel to the tongs of the lifter, from whence it can b readily seen auo can be drawn straight outwardly away from the engine by the fingers of the operator.

Some changes may be made in the C(;il struction and arrangement of the parts of my invention without departing from the real spirit and purpose of my im ,tion, and it is my intention to cover by my claim any modified forms of structure or use oi mechanical equivalents which may be rcasonably included within its scope.

I claim as my invention:

In a valve lifter, a pair of tongs having jaws and having handles of which one is cylindrical, and a latch comprisin a rip of sheet metal having one end ioop ed an said cylindrical handle, its other end piovided with an end hook, and having its intel-mediate portion struck outwardly to form an intermediate hook on the same side of the latch as said end hook.

Signed at Akron, in the county of Pl Y outh and State of Iowa, this 7th day of July, 1925.

GEORGE BLUivii.

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