US2644227A - Spring valve jig - Google Patents

Description

July 7, 1953 Y. UNAL SPRING VALVE JIG Filed Dec. 12, 1947 INVENTRQ: Vunus Una/ m-mHmR-smm m l Patented July 7, 1953 UNITED' STATES PTEN'T:OFFICE;

SPRING VALVE JIG l Yunus Unai, Lafayetteylnd. i

Application December 12, 1947,' Serial No."791,185

1 This invention relates to means for removing compression springs from fuel and exhaust valves of internal combustion engines and for replacing the springs on said valves.

The removal of compression springs from the valve stems of the above-enumerated valves and thefreplacement of such springs on the stems of said valves are extremely diiicult jobs, for the reason that these springs are exceedingly strong and for the further reason that they lack a sufficient working area to engage and compress them. In other words, not only are these springs difficult to compress for the purpose of removing or replacing them with respect tothe valve stem, but they' are also difficult to handle and manage, so that even if a suiiiciently'strong force-Were available to compress them it' could not readily be applied to them. 'Special tools have therefore been devised to handle such valves, but none of these tools has been found to be completely satisfactory. Some of these tools cannot exert a sufficiently strong compressive force to compress the valve spring, and others of these devices which can and do exert a suiciently strong force v:for the purpose indicated, are not adapted to engage the valve spring well enough to apply their force thereto. The present device, on the other hand, is well adapted to hold the valve spring and the valve stem on which it is mounted to enable a, sufficient force to be applied kto the spring to compress it. It is accordingly the principal object of this invention to provide a valve holder of the character described, which enables a su'iciently strong force to be applied to the valve spring to compress the spring, either for removal from the valve stem or for replacement thereon. I

vvAll of the other devices known to applicant, which have as their object the holding ofvalve springs for the exertion'of a Ycompressive force thereon to remove or replace the same are designed for use in connection with a valve of a given size, and none of these devices may be used in connection with valves of different sizes. The present device, however, is adaptablev for use in connection with valves of many sizes, and it is therefore a second object of this invention to provide a device of the character described, which is adaptable for use in connection with valves of different sizes. l

Still another object of this invention is the provision of a device of the character described. which has no moving parts and with, therefore, cannot get out of order. All other devices of this general character known to applicant are 2Y provided with movable parts which very frequently do-'get outof order.

stm another object of this invention is the' provision of a device of the character described,

which may be made inexpensively for sale a`t al Y taining member; f

spring thereon is compressed to release its re- Fig. -2 is a view similarto that of VFig. l, show#` ing the'A position of the valve *stem when the yspring thereon is compressed and showingthe spring-retaining member in released positionrelative thereto;

Fig. 3 is a sectional view on the line 3-3 of 1 Fig. 1; and

Fig. 4 is a longitudinal section on the line 4-4 of Fig. 3. Y l 1 It will be seen in the drawing that the device herein'claimed includes a base l] and an upright li mounted thereon.vv A tubular or cylindrical member l2 is mounted on the upright ll, and

it will be noted that the longitudinal axis of said tubular member extends at a sharply acute angle with respect to the vertical. At the lower end of the tubular member l2 is a pair-of diametrlcally opposedflanges' I5. These flanges extend in'- wardly toward each other and their facing edges are parallel to each other.

It will be seen that the tubular member l2 is intended 'to y accommodateV a ,valveY i6, the valve stem ll extending downwardly through it. The valve is provided with a strongV compression springz which bears against a collar 2i at its upper end .and against a retaining member 22 atitslower end'.Y The retaining member'rests upon an enlargedfportion 23 at the lowermost end Y of stem I1.

In order to remove the compression spring from the valve stem, it is necessary to remove the retaining piece 22; the spring then slips over the enlarged end 23 of the valve stem.

It will be noted in Fig. 3 that the retaining member 22 is in effect a split ring having opposed iiat sides 25. The retaining member 22 is also shown to possess an elevated central portion 26 which fits into the spring. It is this raised portion that prevents the retaining member from being slipped olf the valve stem unless the compression spring is in the first instance compressed out of engagement therewith.

It will be seen in Fig. 3 that the flat sides or edges of the retaining member 22 enable it to assume a position between the flanges I5 of the 5 tubular member I2. These flanges therefore engage not the retaining ring but the spring proper. When a force is applied to the top end of the valve stem, said stem will assume the position shown in Fig?. 2. "ThspringI'Z is' not shown"- .10 in Fig. 2 forthe reason'fthat it has'beencompresed into the tubular member in which it is mounted. The flanges I5 prevent a corresponding downward movement of the spring and-.the.. retaining member 22 is thereby freed for removal, 15 as shown in Fig. 2.

When it is desired to replacethespring. o n thevalve stem, the spring is insertedv into'thetui'v bular housing I2 until it rests upon the langesri-v I5. The valve stem Il is then inserted through the ...spring and a; force Vis appliedtheretoA until.` it is brought into the position shown-in Fig-.=-2. The retaining member 22 may now be slipped on the stem I.'I above the'enlargement 23. The force may now be removed from the valve vstem and.y 25 the enlargement 23 will bring the retaining member -22 into engagement with the spring 20.y The spring is now locked-.in place.

Theiforegoing relates-to a valvewhose spring 2Ilis sufficiently large -to .engage the ianges 30 I5 of the tubular .housing- I2. .When Ya smaller valve is dealt with and its spring member is not suiiiciently large to engage flanges I5, anadapter must be used. This adapter is really a small version of tubular member I2. It is itself al tubular member-having a pairv of inwardly extending-.flanges 3| vwhich correspond. to the flanges I5 of tubular` member I2. Th outer dimensions of adapter 30 correspond to the inner dimensions of tubular member I2, and said adapter is thereby enabled to rest upon the lianges I5 when inserted into the tubular .member l2. There. is a pin 32 which is aiixed to the side of adapter SI1-and'V whichengages a slot: 33 formed in the top edgeof tubular member I2. `.When.said.pin.. is in engagement with said slot,..the.sides.of flanges :3| are. parallel to theside edges.'of anges'l5.

Toremove a spring from asmaller valve than was above referredto, said valve. is inserted intov 59 the-adapter .until its retaining member rests in the space between .theanges 3|.- The process above. described is then Arepeated andthe retaini. ing member is thereby released..

It will be understood that vthelforegoing..,de-

scribes. apreferred embodimentof this invention... and. that. modifications may be incorporated therein within the'brad spirit and .sope of the" inventionii For "example," although` 'a 'single'V adapter is shown mounted'in the tubu1ar"housr;0 ingtwofor more adaptersmaybe -"mountedtherein," one within-the other? An'-alternative"Wouldf/ be to. 'introduce-'adapters of diffrent *dimension into the tubular housing I2. The outer?dirrien-f"Ar sions of these adapters would remain constant. however, and only their inner dimensions would vary.

I claim:

1. A jig for supporting a spring valve during spring release or assembly comprising, a base adapted to rest on a Work surface, an upright on said base, a tubular housing open at each end and of a length less than the length of the spring valve'y withwhich itis to be'used'mounted on said upright with itsilflongitudinal vaxis -diverging slightly downwardly from said upright, said housing having a pair of inwardly extending flanges-.formed at its lower end, said flanges being diarnetrically opposed to each other and having parallel facing side edges, said flanges adapted to support thevalve assembly with the valve stem extendin`g`upwardly 'from said cylindrical housing.

2. A jig for supporting a spring valve during spring release :or assembly, ,comprising a base.

adapted torest. on. a work surfacewa tubularv housing open at each-'end andof a lengthless than the length of the .valve with which it is'to be used, -supported onsaid base in spacedrelation therefrom with its longitudinal axis aty a slight angle to the verticaL-:saidfA housing having` a pair of opposed .inwardly VV,extending ilagves,`

formed at its lower end, -a tubular member open .at bothends disposed. within -saidhousing and.

supported-therewithiny on said flanges, said tubular member vhavinga pair-of facing inwardly.v extending flanges at -its flower vend,- andcooperating means on said housing andl saidV tubular vmember' for separably .interengaging the same r with their flanges in register'withone another;

3. The combination of c1aim=2 whereinsaid cooperating interengaging means .on Ysaid hous.. ing and said tubular member comprise-.-slots. formed'in the upper edgeof. said housing and correspondingly located pins provided on said tubular-member adaptedto fit vwithin said-slots...

References. cited .in thelniei'of uns., patent UNITED.: s'rAfriss.imainrrs:y

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