US1538727A - Device for the removal of internal-combustion engine valves - Google Patents

Description

May 19,1925. O I 1,538,727

G. J. MORGAN ET AL DEVICE FOR THE REMOVAL OF INTERNAL COMBUSTION ENGINE VALVES Original Filed Dec. 12, 1922 Patented May 19, 1925.

UNITED. STATES GEORGE JAMES MORGAN AND. arormnn MILLWARD MORGAN,

I MERTHYR TYDVIL, warns.

nnvron FOR THE REMOVAL or INTERNAL-COMBUSTION ENGINE VALVES.

Application filed December 12, 1922, Serial No. 606,537. Renewed March 10,1925.

To all whom it may concern:

Be 1t known that we, GEORGE JAMES MORGAN and RICHARD MILLWARD MORGAN,

subjects of the King of Great Britain and Ireland, and residents of Cefn Coed, near Merthyr Tydvll, county of Glamorgan, Wales, have invented a certaln new and use ful Improvement in Devices for the Removal r cotters of said valves to be quickly and safely removed, without fear of damage to fingers. Further, the device enables the cotters of two valvesto be removed, if necessary, with one setting.

Broadly speaking, our invention comprises a pair of plates constructed and adapted to be inserted in superimposed fashion between the valve spring cups or equivalents and the tappet heads, and adapted to be prized apart so that one bears against the tappet head and the other against the valve spring cups or equivalents, causing the latter to be moved up the valve stems.

The apparatus in accordance with our invention more particularly comprises two coacting plates of steel or other suitable metal, each formed with apertures, opening out of the side of the plate, said plates being adapted to be placed in superimposed fashion between the appropriate valve spring cups and tappets heads. That is tov say, one plate, (hereinafter termed the lifting plate is adapted to slide laterally on to the ends of the valve stems below the usual spring-retaining cups, so that said valve stems are received within its respective apertures, and the other plate (hereinafter referred to as the locking plate) adapted to slide laterally toa position by the side of said lifting plate, on the tappet side thereof. In action, separation of the two plates from one another causes the outer face of the lifting plate to contact 0 with the valve'spring cups, and the outer face of the locking plate to press on to the tappet heads, and since said tappets offer resistance, the valve springs are caused to be c mpressed y h r g of their re taining cups by the lifting plate. The Scotters may thenbe removedbetweenthe two plates. i I Further features ofour tion. In the drawings z- Figure 1 is a plan view of a lifting plate;

and,

Figure 2 a longitudinal section through 00-?) in Figure 1.

gigure 3 is a plan view of a locking plate:

or onrN corn), NEAR I V inventionfwill become apparent from the accompanying drawings, in ald of the following descr p- Figure 4 a longitudinal section through c-0l in Figure 3.

Figures 5 and 6 are similar viewsto Figures 1 and 2 of a modified form of lifting plate; and f Figures 7 and 8 similar views to Figures 3 and l of a modified form of locking plate.

Figure 9 is a diagrammatic view showing the application of the device.

Similar parts in the several-views are.

indicated by like letters of reference.

The apparatus comprising a lifting plate a formed at each end with anaperture a conveniently of circular shape, each of the two apertures a opening intothe same side I of the plate by the formation ofa neck (1?. A locking plate 7) is formed with an aperture b at each end, both of said apertures?) opening out to the same? side of the said plate.

The two plates are adapted to slide later ally on to the endsof'the valve stems between the valve spring cups and tappet heads as seen more clearly in reference to v Figure 9, the apertures 0. and b of the plates 0 and 1) respectively, receiving said valve stems which enter via the opening-s in the sides of the plates.

Theouter surface 0 of the lifting plate around its aperture a is adapted to contact with the valve spring cup (see Figure 9) and the outer surface of of the plate I) about its aperture 6 is adapted to contact with the tappet head, the inner edges 6 of the two plates when in position contacting with one another.

It will be followed that separation of the two plates away from one another will cause the surface d of the plate b to press down on to the tappet heads, and since said tappet heads offer resistance, the surface 0 extraction of the cotter pins.

not necessarily eX-tend completely through of the plate a, pressing against the valve spring cups, will cause saidflcups to move up the valve stems and compress the springs.

To facilitate separation of the two plates a. shallow slot f is formed in either one or both of the two meeting surfaces, and in the case where both are slotted the slot of the bottom plate is serrated, and the two slots together when the plates are in position as seen in Figure 9, forni a rectangular passage. Said passage serves for the reception of a flat key, screwdriver blade or the like, which given a halfturn, serves to bring it from its flat, to'edge )osition, c'auses separation of the two plates.

In. order to prevent the plates slipping when in use, the upper surface a of theplate a is formed with an annular recess about the aperture (4 for the reception therein of the valve spring cup. lnthe construction of lifting plate shown in Figures 1, Qand 9, said recess is of square formation, whilst in the construction shown in Figures 5 and: 6, said recess is of saucer shape. The locking plate b shown in Figures 3, land 9. is formed on its lower surface (Z about the apertures b with annular recesses 72/ adapted to receive the tappet heads, whilst the construction shown in Figures 7 and Sims no such recess.

A slot or gap i-may be formed in the lower surface of the plate a, if necessary, opposite the opening a of the aperture a and when the said plate is raised to compress the spring, said gap allows a passage for the Said gap need from the aperture of to the exterior.- v The shape of the recesses'g and h', and. of the. apertures a and b and the thickness of the plates, as well as the dimensions of the device, depends on the particular make of engine to which the device is intended to apply. y

Bhe plates are 7 preferably reduced in the said aperture is at the centre of length of the plates, equal lifting'pres'sure obtains at both ends of the We claim v 1, A valve springcompressing device c011 sistingofapair of complement-a1 separate lifting plate.

plates adapted for. superimposed insertion beneath the valve spring cups, said plates.

being so constructed that they may be pried apart by a separatetoolon implement.

2. A valve spring compressing device consisting of a pair of complemental separate plates adapted for superimposed insertion beneath the valve spring cups, said plates having matching groove portions which provide an opening forreceiving a separatetool or instrument whereby they may be pried apart.

3. A valve spring compressing device comprising a pair of normally separate but cooperating locking and liftlng plates, each formed with valve spindle receiving apertures, said plates being adapted to be assembled face to face and having means on ad'- jacent faces to receive a tool or implement whereby the locking plate may be forced down-into the tappet head while the lifting plate maybe raisedto compress the springs.

In testimony whereof the said GEORGE JAMES MORGAN has affixed his signature hereto this 29th day ofNovember 1922.

GEORGE JAMES MORGAN. In testimony whereoft'he said Rrorrauo' MILLWARDI MORGAN has attired his signature hereto this 30th day of November 1922.

RICHARD MILLWARD MORGAN.

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