US1598754A - Spring compressor - Google Patents

Description

Jfz'c;

A rnay.

N. SULENTIC SPRING COMPRESSOR Original Filed Oct. 26, 1925 Patented Sept. 7, 1926.

PATENT OFFICE.

NICHOLAS SULENTIC,

OF WATERLOO, IOWA.

SPRING- COMPRESSOR.

Original application filed October 26, 1923, Serial No. 670,810. Divided and this application led December 3, 1924,

My invention relates to improvements in spring, compressors, and the object of my improvement is to supply a device having clamping or compressing elements for compressing springs mounted on valve-stems, in which one element is resilientlybifurcated to permit it to be yieldingly removably seated about a valve-stem ladjacent a spring to be engaged by it and compressed b-etween it and the opposed clamping element, the firstmentioned element having its coacting resilient forks shaped with opposed stop members suitable to prevent accidental lateral displacement of the said element when so seated about the valve-stem.

The subject-matter of this application which is intended to disclose the above improvement is a division of my previous application Serial No. 670,810, filed October 26, 1923.

The device of this application is illustrated in the accompanying drawings, in which Fig. 1 is an elevation of my said improved spring compressor as in operation holding a coiled spring under compression upon a valve-stem, to clear and permit the extract-ion of a terminal key or stop-pin therein, the dotted lines showing the open position of one of the clamping elements thereof. Fig. 2 is a fragmental upper plan view of the other clamping element with its pair of resilient members seated around the valve-stem and releasably interlocked therewith against sidewise removal.

The numeral 1 denotes a U-shaped frame made of a flat bar and having on one terminal arm a pair of resilient forks whose flat shanks 20 are secured to opposite faces thereof by rivets 21. As shown in Fig. 2, the Shanks 20 are shaped with concave forks 22, and the forks 22 have in the same transverse plane like fiat arcuate projections 23, their opposed inner edges concave toward each other to providey a circular opening therebetween which is slightly larger in diameter than the valve-stein 26 to be embraced thereby. rhesc concave inner edges of the parts 23 at their terminations approach at a less distance than the diameter of the valve-stem 26, thus providing stops which prevent sidewise displacements in either of opposite lateral directions of said valve-stem, unless sufficient manually exerted force is brought to Serial No. 753,713.

spread the forks 22 apart to thus cause them A coiled compression-spring 27 is mountedaround said valve-stem and is engaged between saidblock part 24 and a key or pin 28 inserted through a transverse aperture near the opposite end of the stem.

Because of the small clearance afforded in the assembled structures, it is difiicult to extract the pin 28 when it is desired to remove the valve-head 25 and stem 26, the spring 27 being in the way of the tools, so the device illustrated or any other equivalent thereto may be used to easily compress the spring while upon the valve-stem so that clearance is given the extracting tool to operate upon the pin 28.

ln the device illustrated the other terminal member of the U-shaped frame 1 has a boxing 2 secured thereon by rivets 6 or other means, and this boxing has spaced parts 4 connected by bolts or rivets 5 the interspace 10 of which has a longitudinal passage to receive a slidable rack-bar 12 with aA pointed terminal 13 opposed to the center of the forks 22. The interspace 1U is widened to receive and seat a small pinion 9 whose teeth mesh with the teeth of said rackbar 12, and the shaft of said pinion ex teriorly of this boxing has mounted thereon a handled crank 11 for rotating it, A transverse passage is provided in said boxing to seat a slide pawl 7 which may terminally engage roots of teeth on the rack-bar to lock the same in a desired position in th-e boxing. This pawl is limited in movement outwardly bv means of a stop-pin fixed in the frame 1.

he boxing has aweb 2 and a terminal clamping part 19 with centering stud 18. On the other end of the rack-bar 12 is mounted rigidly by a groovedpart la-.and rivets 15 a clamping-member 16 having a conical centering stud 17 opposed to the other centering stud 18. The clamping-members 16 and 19 are employed to re-compress a spring 27 after the latter has been removed from the valve-stem 26 to permit it to be then taken in any suitable clip device and While under compression re-mounted on said Vvalve-stem before the pin 28 is reinserted.

As indicated bythe full linesin the drawing at Fig. l, the sprinw. 27 is placed in compression between the clamping-members 124-13 and 22-23 by rotating the pinion 9 appropriately, when the terminal 13 is engaged with the center of the valve-head 25 and the resilient forks 22 caused to Vreceive and embrace the rvalve-lstern, with the arcuate flanges 28 engaging the spring 27. Any sudden slip cannot dislodge the. fork parts 23 from aboutthe stein 26, so that the device thus is keptv convenient-ly in operative position relative to the valve-stein until the pin 28 is removed. l ,Y

Having described my invention, what l claim as new, and desire to secureby Letters Patent, is

l. A spring compressor, comprising rigid clamping means slidably connect-ed 'to be movedl to and from each other, one means containing resilient arms having terminal flat circularly yarcuate transversely spaced forks which resiliently claspan end part of a coiled spring between them and have in the saine transverse plan-e opposed flanges to vsaidv seat, a rack reciprocably mounted also in said: seat and in mesh with'said pinion, a

clamping member on one end of said raclg, a rigid U-shaped frame having one ,end connected to said housing, and having its other end opposed/to the other end of said rack, and provided with flat spacedspring furcations, said furca-tions being circularly larcuate to yieldingly encircle a coiled spring and an axially disposed valve-stein therein, said furcations having arcuate inwardly dis,- posed flanges to closely encircle the valvestein, and the furcations being adapted to yieldingly clasp between them the spring while-theflatter is under compression.

In testimony whereof I affix my signature.

Nici-rotas suLnNTio.

Images