US1191658A - Valve-spring retainer. - Google Patents

Description

n. L. BROWN. v VALVE SPRING RETAINER. APPLICATION FILED MAR- 25, 19l5.

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DAVID L. BROWN, OF NEW YORK, N. Y.

VALVE-SPRING RETAINER.

Specification of Letters Patent.

Patented July 18, 1916.

Application filed March 25, 1915. Serial N0.'16,998.

T 0 all '10 kom it may concern Be it known that I, DAVID L. BROWN, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved ValveSpring Retainer, of which the following is a full, clear, and exact description.

The invention relates to spring-pressed valves of internal combustion engines and other engines, and its object is to provide a new and improved valve spring retainer arranged to permit of conveniently and quickly disconnecting the spring from the valve to allow regrinding of the valve in its seat or removal thereof for repairs or other purposes, and to hold the spring confined in compressed condition for conveniently replacing it on the valve after the repairs have been made.

In order to accomplish the desired result use is made of a support, preferably inthe form of a casing, adapted to inclose the valve. spring, the support being provided at one end with a seat for one end of the valve spring to rest on, and a retaining means in the other end of the said support for supporting the other end of the valve spring at the time the valve spring is compressed to allow removal of the usual valve stem retaining means on which bears the valve spring to normally hold the valve to its seat.

A practical embodiment of the invention is represented in the accompanying draw ing forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a sectional side elevation of the valve spring retainer as applied to a puppet valve of an internal combustion engine; Fig. 2 is a similar view of the same and showing the retaining key inserted to hold th valve spring in compressed condition on' the support; Fig. 3 is a side elevation with parts in section of the valve spring retainer after its removal from the valve and with the valve spring held compressed therein; Fig. fl: is a plan view of the same; Fig. 5 is an inverted sectional plan view of the same on the line 5-5 of Fig. 2; and

bustion engine or other engine is normall the products of combustion according towhether the valve is used as an admission valve or as an exhaust valve.

The construction so far described is of the type now generally used on internal combustion engines for automobiles and like power driven vehicles.

The valve spring retainer is constructed as follows: A support H in the form of a cylindrical casing incloses the spring C and the cup or washer D, and the upper end of the support H is provided with an inwardly extending flange H on which rests the up per end of the spring C. The top of the flange H rests on the bearing F for the valve stem F and the lower end of the support H is provided on opposite sides with key slots H for the insertion of a key 1, preferably made U shape, as plainly indicated in Figs. 5 and 6. The lower end of the support H is also provided with cutout portions H in alinement with the valve stem key E to allow of inserting or removing said key, as hereinafter more fully explained. The support H is so arranged that the key slots H are above the lower end of the spring C and the cup D at the time the valve A is seated on its seat B, as plainly indicated in Fig. 1.

When it is desired to regrind the valve A or remove the same for repairs or other purposes it is necessary to remove the spring C and for this purpose the operator returns the crank shaft of the engine a sufficient distance to cause the lifting means G to raise the stem F and with it the valve A until the under side of the cup D is above the slots H and then the key I is inserted on the said slots H as indicated in Fig. 2. The operator now further turns the engine shaft to lower the lifting means G whereby the spring C forces the cup or washer D onto the key I thus preventing further downward movement of the cup D but allowing the valve stem F to slide freely downward. When the valve is in lowermost position the key E is removed from the stem F and then the valve is removed and finally the support H with the spring C held compressed therein is removed and set aside, as shown in Fig. 3. It will be noticed that the valve A and its stem F are now completely free /'of the spring and therefore the valve when replaced can be ground in its seat, or when removed can be repaired. After the grinding or repairing has been accomplished and the valve is again in position then the casing H with the spring C held compressed therein is replaced and the key E is reinserted in the stem F and then the operator again turns the engine shaft to cause the lifting means G to raise the stem F so that the key E engages the under side of the cup or washer D and lifts the same off the retaining key I.

Then the cup D reaches this position the retaining key I is withdrawn and the valve is new again in position for closing and opening by the action of the lifting means G and its spring C. It will be noticed that by the arrangement described the spring C is compressed within the support H and is locked therein while being in a compressed state, and the support with the spring therein can be removed and set aside until the desired repairs have been made. it is understood that the support H forms a part of the valve fixture and no special tools or the like are required excepting the key I when removing the spring from the valve or replacing the same. 7

The valve spring retainer shown and described is very'simple and durable in construction and can be readily applied to the spring-pressed valve now generally used on internal combustion engines and other engines. It is understood that the spring C of each valve A of an internal combustion engine such as used on automobiles is usually located in an inaccessible place and hence such springs are very diflicult to remove whenever it is desired to regrind the valve A or remove it fro-m the engine. With the retainer shown and described the spring can be very easily removed and replaced after the repairs have been made.

It is distinctly understood that for a sixcylinder engine, for instance, having six admission and six exhaust valves, twelve retaining devices are used, one for each individual valve of which it forms a permanent part. It will also be understood that other vided at one end with a seat for one end of the valve spring to rest on, the other end of the casing being provided with a key slot, and a retaining key insertible into the said key slot at the time the valve spring is compressed and its other end is beyond the said key slot to allow this end of the spring to be seated on the said retaining key.

2. A valve spring retainer, comprising a casing inclosing the valve spring and pro vided at one end with a seat for one end of the valve spring to rest on, the other end of the casing being provided with diametrically opposite key slots and with cut-out portions for the insertion or removal of the valve stem key, and a U-shaped retaining key insertible in the said key slots and projecting into the path of the other end of the valve spring at the time the latter is compressed to allow this end of the valve spring to seat itself on the retaining key to support the compressed valve spring within the casing.

3. A valve spring retainer comprising acasing entirely inclosing the valve spring and provided at one end with a seat for one end of the spring to rest on, a key slot adjacent the other end of the casing, and a key adapted to engage the slot and support the inclosed spring while in its compressed state.

4. A valve spring retainer comprising a suitable casing permanently inclosing the spring, held in position on the engine cylinder by the pressure 'of one end of the spring on an annular bearing in one end of the casing, and having a removable key engaging slots in the other end of the casing and also on gaging the other end of the compresser spring, for the purpose of locking the spring in its compressed state within the casing.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

DAVID L. BROlVN.

l/Vitnesses THEO. G. Hos'rnn, GEORGE H. EMSLIE.

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

Washington, D. C.

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