US1513160A - Spring compressor - Google Patents

Description

Get. 28, 1924. 1,513,160

E. L. DAHLQUIST sPiuNe COMPRESSOR Filed April 9, 1923 Ernesl L. Dahlquisl.

Patented Get. 28, 1924.

nannsr L. DAHLQUIST, or AUBURN, Iowa.

srnrns ooivirnnsson.

Application filled April 9, 192a. Serial Nop 630,987.

To all whom it may concern: 1

Be it known that I, ERNEST L. DAHL- UIs'r, a citizen of the United States residing at Auburn, in the county of Sac an'dState of lowa, have invented certain new and useful Improvements in Spring Compres-- sors, of which the following is a specification. 1 g i I r w This invention relates to tools, and is particularly well adapted for lifting and compressing the springs of the inlet and exhaust valves of an internal v combustion engine to allow removal of the valves and stems.

The primary 0b ect of this invention is the provision of a valve spring compressing tool which will automatically look when the spring has been sufliciently compressed and may be unlocked and opened by a very simple movement and with a, minimum.

amount of force. I 7

A further object of this invention is to provide an improved valve spring com pressing tool of few parts, eliminating the complicated locking means yet producing 'a highly efficient too], easy to operate and not susceptible of getting out of order. y

'A still furtherobject of this invention is the provisionof a tool that is strong, durable, and can undergo the rough usage yet is extremely light and cheap toymake.

Other objects of the invention will appear in the following detailed description taken in connection with the accompanying drill/V1 ing, tor ninga part of this spec fication, and.

in which drawing:

Figure ,lis a side elevationxof the i nproved valve spring compressingztool show-.

iiig the same in operative relation to, a valve s rin beforebein com ressed a fra ment. b .7 b

of an internal combustion engine being shown.

Figure is an end view of the tool in operation on a valve spring with the tool in a closed position and the spring compressed. V I 1 Figure is a vertical central section through a portion of the tool. 7

Figure at is a crosssection taken on the line 4-4 of Figure 3, looking in the direction of the arrows.

Figure 5 is a perspective detail view of the spring engaging shanks of the tool.

Figure 6 is a perspective detail view of against jaws of one ofthe.

the spring engaging jawsof the other shankof the too-l.

Referring; to the drawings in detail, where-insimilar. reference characters designate corresponding parts throughout the several views, the letter A. indicates the internal. combustion engine of the ordinary or any preferred type and B the valve; 0 is the supporting or main shank member of the improved-tool; D, theco-acting'shank and E the operating lever whereby the tool is closed and locked or opened.

The valve B includes the valve stem '7, which is normally held in a lowered posi-' tion for holding the. valve on its seatby .the compression spring 8, which is coiled around stem 7. The cup shaped spring seat 9, providedloosely on stem/Z, is held displacement by means such .asa pinorthe like. Valves-tern 7 israised in the well known manner by the push rod 10 having the adjusting nuts 11 and 12Tarranged on its iipperend for the provision of clearance. g j

, Ref rring now'to the main shank member (J, same may be formed of metal, preferably U-shaped in cross. section,' having one end any preferred 7 bifurcated to form fingersll and 14 adapted to engage the work, while the opposite end forms a convenient grip or handle 15. .A. pair of upstanding lu gs 16 and 17 carrying a transverse pin; 18 .pivotally support coacting shankD which also, carries a pair of engaging member-s l9 and 20 at. its end ada c entthe bifurcated endof shankG. These lingers are rigidly mounted onshank D by rivets, or analogous means 21 and have their engaging @lugs 22, and 23. disposed on, a.

higher planethantheishank D for the purposefof including a arge number oi spring coils when in operation.

Concerning the operating lever B; such is also preferably made of metal or strong material and issubstantially U-shaped with an elongated portion to, form ears 24 and 25 by means of which it is [pivotally mounted on shank C by a pintle 26.- Transverse pins 27 may, have an anti friction roller 28 mounted thereon to slide along under sur I face of shank D when thedevice is operat-- ing. Stop pins, 29 also carried by ears 24: and 25 serve as'a limiting element to lock and support lever E when in a completely; opened; or closed position, as shown in Figures 1 and '3.

It is to be particularly noticed that the relative distance of pins 26 and 27 and 29 away from the pivotal point 18 is of the greatest importance. In the operation and if: during the closing movement, pin 27 reaches or passes dead center and attains a position back of pin 26 while pin 29 is still further back of 27 and owing to the expanding tendency of the work 8 shank D is forced open at its engaging end and consequently closed as in direction toward shank G at its opposite end which causes pin 29 to function as a stop or looking member for the jaws of the tool. The dotted position in Figure 1 shows the tool closed or locked.

Changes in details'may be made, without departing from the spirit or scope of my invention; but,

I claim:

1. A spring compressor comprising in combination a supporting shank substantially U-shaped in cross section, a pair of up standing ears carried thereby, a co-acting shank pivotally disposed between said ears f the supporting shank, spring engaging jaws carried on the adjacent ends of the shanks, and an actuating and a locking shanks and having its arms pivotally connected to one of said shanks, a guide carried by the arms and extending between the shanks to engage the inner face of one shank, and a locking pin carried by the arms beneath the guide and adapted to engage the inner face of the other shank and limit movement of the lever.

3. In a spring compressor, the combination of a pair of coacting shanks disposed in pivoted relation to each other, an operating and locking means comprising a lever with projecting sides extended at one end to straddle both shanks and pivotally carried by one of them, a transverse bearing roller and stop pin carried intermediate the wanting shanks, the stop pin being so situated between the pivotal point and said bearing roller that the expanding tendency of the work forces said operating lever into a locked position.

a. In a spring compressor, a pair of shanks pivotally connected at a point intermediate their lengths to provide forwardly and rearwardly extending portions, one of said shanks having its forwardly extending portion provided with means for engaging and supporting a spring supporting cup,

arms carried by the forwardly extending portion of the second shank and curved outwardly to extend upon opposite sides of a spring, lugs extending upwardly from the endportions of said arms and having inturned end portions for engaging convolu-v tions of a spring at opposite sides of the spring, and actuating means cooperating with the rearwardlyextending portions of said shanks.

5. In a spring compressor, a pair of shanks movable towards and away from each other, spring cup engaging means carried by one shank, arms carried by the. other shank and shaped to extend in straddling relation to a spring, and lugs extending 'up wardly from said arms and having inwardly extending portions for engaging convolutions of the spring, at opposite sides of the spring. i I

6. A spring compressor including members movable towards and away from each other, spring cup engaging means carried byone ofsaid members,vand arms carried by the other member for straddling a spring and having lugs extending inwardly of the arms for engaging convolutions of the spring at opposite sides of the spring.

ERNEST L. DAHLQUIST.

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