US1530168A - Spring compressor - Google Patents

Description

'March 17, 192s. 1,530,168

G.'w. GARWOOD SPRING COMPRESSOR Filed se i. 25,1923

1mm in M I position.

Patented Mar. 17, 1925.

UNITED STATES GEORGE W. GAR'WODD, OF EL'MONTE, CALIFORNIA.

SPRING GOMPRESSbRQ Application filed September 25, 1923. Serial No. 664,661.

To oiZZ-wlzom it mag concern.

Be it known that I, Gnonen lvqGi-xnwoon, a citizen of the United States, residing at El Monte, inthe county of Los Angeles and State of California, have invented new and useful Improvements in Spring Compressors, of which the following is aspecification.

My inventionrelates to valve springcompressors, and a purpose ot my invention is the provision of a spring compressor of simple, durable and efficient construction which iseasilyoperated to effect the absolute compression of a spring whereby the return o't the springto 'the valve stem of an engine is facilitated. I

Although I! have herein shown and will describe only one fOIln of spring compressor embodying my invention, it is to be understood that various changes and modi- :tications may be made herein without "departing from the spirit iofthe invention and thespirit and scope of the appended claims.

In. the accompanyinng drawings,

Fig. l is a view showing in perspective one term of spring compressor embodying my invention.

Fig. 2 is a viewlshowing in side elevation and partly in section the' compressor shown in Fig. 1 in applied position! to a support and in the act t effecting the compression of a spring.

Fig. 3 is a view similar to. Fig. 2showing the compressor in spring compressing Fig. 4 is an enlarged detailedperspective view of a valve spring with a retainingyoke in applied position thereto.

Fig. 5 is a detailed perspective view of the retaining yoke. v n

Fig. 6 is a view showing the manner in which the compressed spring is applied to a valve stem when employing the retaining yoke.

F ig. 7 is a fragmentary view showing in side elevation the spring compressor with the operatinglever andbar in their upper most positions. y g

Similar reference characters refer to similarparts in each of the several views.

Referring specifically to the drawings and particularly to Figs. 1, 2 and 3, my invention in its present embodiment comprises a base of elongated form and preferably constructed of metal, one end of the base being provided with a downwardly inclined extension 16 which is adapted to cooperate with an upwardly inclined portion 17 ota movable jaw 18. The jaw 18 also includes a portion 19 the clamping surface of which is disposed in spaced parallelism to the base 15. Ayoke 20 is secured to the base 15, and in the present instance such yoke is tormed'ofa single length of metal, such as a rod bent substantially in in the form of a U, and including an upright 21 having its lower end extended into the base 15 and'secured therein by means of a .pin 22. Therod also includes a verticahportion 23 which extends through. and beneat hthe base 15, it also being secured within the base by meansiof a pin'Qt. The

lower end of the portion 23, ispadapted to loosely receive the jaw 18, and awingnut 25 is threadedly mounted on. such portion so as to adjustably support the jaw upon the rod and to move the into clamping relation with respect to the-base 15. As shown' in Figs. 2 and 3, the base 15 and the jaw 18 engage the opposite sides of a work bench 26m other suitable support, and by manipulation of the. nut 25 the jaw 18 can be moved into clamping relation to the support 26, thereby fixedly securing the base 15 to the upper side of the support. In the clamping position of the jaw 18 the upwardly inclined portion 17 contacts with the downwardly inclined extension 16 so as to maintain the base 15 and the portion 19 in spaced parallelism. Mounted for vertical sliding movemen upon theyoke 20 is a bar 27 provided with openings to slidably receive the portions 21 V-shapedsoas to co-operate with an v up-' and 23 of the yoke, the opening receiving the wardly ,projectingstild 30 formed in the base 15 for securing a valve spring in proper position upon the base. That end of the base 15 provided with the stud 30 is formed with a supporting flange 31 which extends transversely ot the base so as to co-operate with the latter and the stud in supporting and positioning the spring so as to be properly acted upon by the jaw or head 29. 1

The bar 27 is provided adjacent the head 29 with a cam surface 32 which is adapted to be engaged by a cam 33 formed on the end oi an operating lever 34. The lever 34 is bolted or otherwise secured to a pair of arms 35 adjustably connected tojeach other by a bolt -36 and pivoted upon the yoke 20 at the point indicated at 3T. Bv an adjustment of the bolt 36the'arms can be drawn together so as to frictionally engage the yoke 20 suiiiciently to retain the arms and consequently the lever 34 in elevated or inactive position. The mounting of the lever 34 is such that it can be moved downwardly to cause the cam 33 to engage the cam surface 32 in effecting a downward movement of the bar 27.

The operation of the compressor is as follows: A valve spring, designated at 38, together with its washer 39 is positioned upon the base 15 and in surrounding relation to the stud 30, as clearly shown in Fig. 2. In order that the spring 88 may be applied, it is necessary that the bar 27 be elevated upon the yoke 20. The spring having been applied, the stud 30 operates to properly center in the spring in relation to the head 29 so that the bar 27 may now be forced downwardly by moving the lever'34 from the position shown in Fig. 2 to that shown in Fig.

With sufiicient downward pressure exerted upon the lever 34, the head 29 can be forced downwardly to efi'ect complete compression of thespring 38.

In the lowermost position. of the bar 27, as shown in Fig. 3. the tendency of the spring 38 to expand urges the head end of the bar upwardly to cause a binding between the bar and the rod 21 of the yoke 20 thereby actually preventing upward movement of the bar upon the yoke. ;As the bar is now locked against upward movement, it will be clear that the lever 34 can be swung clear of the bar without fear of the spring 38 moving to expanded position.

lVhile the spring 38 is compressed, a conventional retaining yoke, designated at 40, can be applied to the spring and washer in the mannershown in Figs. 3 and 4 so that when the bar 27 is elevated free of the spring the latter will be retained in compressed pdsition. This retaining yoke also serves to retain the spring in compressed position while the latter is being moved from the compressor and into proper position uponthe valve stem of an engine, as shown in Fig. 6. The bar 27 can be moved free of the spring 38 by exerting upward pull upon the handle 28 thereby shifting the bar longitudinally to remove the binding engagement between such bar and the rod 21. As previously explained, the opening in the bar 27 for the rod is relatively large, and for the purpose of allowing of the necessary rocking movement of the bar to effect its release with respect to the rod 21. It will be understood that after the bar 27 has been released, it is 7 then gripped centrallyof its length whereby it can be readily lifted tree of the spring.

What I claim is:

1. A spring compressor comprising in combination a spring support, a plurality of rods connected to the spring support, and a spring compressing member having two apertures and sliding loosely over said rods, the said member being adapted to compress a spring seated on the spring support and retain the spring compressed by. jamming on the rods.

2. A spring compressor comprising a plurality of rods, means to clamp the rods'to a table, a spring compressing member having apertures therethrough' sliding loosely on the rods, and a head portion on the spring compressing member adapted to engage a spring and by the reaction of the spring lever the sliding member into locking engagement with the rods.

3. A spring compressor comprising in combination a yoke having a plurality of rods. a spring compressing member having a plurality of apertures therethrough and sliding looselv on the rods. a cam surface on the compressing member. a head to engage a spring, and a lever pivoted to the yoke adapted to bear on the cam and thereby compress. the spring. the reaction of the spring on the head levering the compressing member into locking engagement with the yoke.

4. A spring compressor comprising a spring support. a yoke. a member slidable on the yoke to occupy spring compressing position and non-compressing position. and means for moving the member to spring compressing position, said member being' tormed with an opening to receive the yoke in such manner that the member is automatically and rleasably secured in spring compressing position under the pressure exerted by the spring on the member.

1 5. A spring compressor comprising a spring support. a yoke. a spring compressin member slidable on the yoke to occupy spring compressing position or non-compressing position. and manually operable means for moving the member to spring compressing position. and adapted to be removed .from said member and retained in inoperative position.

6. A spring compressor as embodied in claim 6 wherein the member is slidable on both rods of the yoke so that when moved to spring compressing position the tendency to expand of the spring which is compressed Will operate to friotiona-lly retain the member in said position.

7. A spring compressor comprising a base, a U-shaped yoke supported on the base, a spring compressing member having openings therein to slidably receive the vertical portions of the yoke, said openings being formed to allow a limited pivotal movement of the member upon the yoke, and manually operable means engageable With the member for moving the latter to spring oompressing position, the limited pivotal move ment of the member allowing a spring compressed by the member to urge the member into binding engagement with the yoke whereby the member is secured in spring compressing position.

8. A spring compressor comprising a base, adjustable means for clamping the base to a support, a yoke upstanding from the base, a spring positioning stud on the base,a bar slidably mounted on the yoke and in such manner as to allow the limited pivotal movement of the member, ahead on the member adapted to engage Within the spring to be compressed, and a lever pivotally supported on the yoke and having cam engagement With the member for moving the latter to spring compressing position;

In testimony whereof I have signed my name to this specification.

GEORGE W. GARVOOD.

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