US2004590A - Combined valve lifter and spring compressor - Google Patents

Description

June l1, 1935. J. SUNNEN 2,004,590

COMBINED VALVE LIFTER AND SPRING COMPRESSOR /A/ vf/vroe:

Josep/i .SUN/VEN.

Patented June 11, 1935 i i 2,004,590

UNITED STATES PATENT 'oFF-HCE COllmINED VALVE LIFTER AND SPRING COMPRESSOR `oseph Sunnen, Kirkwood, Mo.

Application January 6, 1934, Serial No. 705,502 4 Claims. (Cl. Ztl-86.3)

My invention has relation to combined valve receiving thespring seat members is broken away;v lifters and spring compressors foi-use in perform- Fig. 3 is a top plan of my invention; Fig. 4 is a ing service operationson automobile engines, and cross-sectional detail taken on lthe line -44 -of it consists in the novel features of -construction Fig. vl.; Fig.r 5 is a plan view of the spring seat 5 more fully set forth in the specification and pointmembersand the end of the framereceiving said 5 ed out in the claims. members with parts in section; Fig.` 6 is avlongi- The invention ismore particularly directed to tudinal sectional detail taken on the line 6- 6 -of what may be termed the overhead type of spring Fig. 5; Fig, 7 is a cross-sectional detail taken on compressor in that it has-its support on top of the a plane indicated by the line 'l-'Jl 0f Fig- 6; and

10 motor block while compressing the spring prepar- Fis". 8 is an enlarged detail showing the inner end I0- atory to removing a valve, and is an improvement Gf the Spring Seat mempelS, parts 0f Which are in over the subject-matter of my co-pending appli- SeClJiOIlcation serial No. 671,087. Because of the manner 'Referring to the drawings. M represents a in which this type of valve lifter is operated-the motor block, the valve .V of 'which is to be reframe is necessarily formed in the shape of a moved. Asis well known in the art, the ValVe V I5- loop, or C, and is also referred to among mecannot be removed without rst disconnecting chanics as a C-type lifter. the valve springs from-the valve stem V', said Because of the wide span between the point of Spring being seated in the valveseat' or washer support and the movable seat for compressing the S Aheld securely t0` the Valve Stem V by' the spring this type of lifter heretofore has not been vlock L;r The function of the valve lifter is to raise 20 very successful on account of the diculties of the- Spring SllCieIlily S0 that the 100k Lmay be making the framefsuiciently strong without un- I'eInOVed andthereby dsenage the ValVe fI'Om due cumbrousness and excessive weight. It -is the the Spring S whereupon the VaJlVS'iS readily lfiieelv principalrobject of the present-,invention to so outof place. `My-mpl`0ved ValVC-liftel COIYlpTiSES construct the lifter frame that'it will combine a frame l, shaped in the form of the letter C, said 25- strength and rigidity with light weight, 4and at frame havingacross-section ofahollow rectangle. the same time so` arrange the operating parts The lower end of the frame I I carries' in permathat the lifter may be actuated withyconvennently xed relation an extension E' which comience and minimum'effort. Y prises a pair of spaced channel arms 2, 2` rigidly In avalve lifter of this type, which is inherentsecured togetherby rivetsS, 3 and spacers 4, 4. 30l ly bulky,A the arrangement of the parts with a The outer extremities of the channel arms 2, 2 View to convenience and lsimplicity of operation diverge to form spring seats 5, 5 and, of course, is ofthe utmost importance in order that the tool the upper -langes of the channel terminate at1v f may be practical. It is also an object of the inpoints 5, 6 just to the rear of the spring seats 351 vention to provide means for securely holding the 5,5 so as not to interfere with the reception of the I spring while compressing `the same, said means spring S on said seats. 'The spring seats 5, 5 are readily accommodating itself to springs of various adjustable to and from each other (for the pursizes. Another object of the invention is topropose of adaptingthem to various sizes of springs)v vide seat members for the spring which,` although by means ofl a screw 'i and nut for receiving the' 40 possessing some flexibility, embody means for screw, the former passing through an openingo 40' limiting the movement of the individual seat in the side of one arm 2 and the latter passing members so that the forces to which they are subthrough an opening o inthe side of the opposite jected may not permanently distort or strain arm 2. When the screw and nut are screwed tothem. Further and other advantages will be gether the seat members are drawn inwardly and 4'5 better apparent from adetailed description of the when the. screw and nut are screwed apar'tthe 4.57 invention in connection with the accompanying seat members are, of course, allowed'to separate. drawings, inwhi'ch:v A tongue 9 serving the purposev of an'abutment Figure 1 is a side elevation of my improved is xed between channel-arms `2, 2 and spotvalve lifter and spring compressor shown applied welded at points l0, I near the innerend of to amotor block which is shown in partial section, said arms, said tongue extending outwardly to al 504 and progressive positions of the operating parts point about midway between the seatsv 5, Scand being shown dotted; Fig. 2 is a viewA similar to the end of the frame I'.' It will be observe'dtdigs; 1 Fig. l except that the operating handle of the 5 andS) that the' arms 2,V 2 diverge .slightly's'o valve lifter is shown inv a series of positions 'near that the sides thereof have a gradually increasing the end of its throw, and the' portion of the frame clearance with the tongue toward theouter end 553' thereof.` The purpose of this space is to permit of a certain amount of resiliency in the individual arms 2, 2, but to limit this resiliency so that the bearing I2 will be directly in line with the 'valve V. The importance of the alinement of these parts will be apparent from whatf'oll'ows.' 4

A square threaded screw I3 is `slidably mounted in the bearing I2 and has a handle I4 xed to itsY upper end, said handle having spaced lugsl 5, l5 lon its, underv surface i6, either one of which (there being twoior convenience) may cooperate withV the frame I in holding a springS when it is to be compressed preparatory to being replaced on the valve1stem.. The screw iScarries a block il on its threaded portion, said block being internally threaded to nt the threads of the screw i3, whereby. the'positionof the block o n the screw may be adjusted by `rotating the screw in its bearing sleeve -I2 so that it may beeither advanced through or withdrawn from the block I'I.

A bell-crank lever I8 formed of similar spaced components I9;A I9 .is mounted on a pin 20adjacent to `a. tubular bearing I2, said pin traversing theA sidesof the horizontal part I ofthe frame Iyand `spaced therefrom by means of a spacing washer 2i. One arm. 22 of said bell-crank lever projects laterally forward andthe otherarm 2-3 projects downwardly, the forward arm 22 being connected by a link 24 to an ear 25 Aextending f romthe side of the block I'I. 2 6. is pivotallymounted at itsginner `end ona pin 21 traversing thehorizontal part I* of theframe I and spaced inwardly fromrthe` bell-cranklever I, tothe arm '23 of whichy the handle 1ever26 `i s:.connect`e,d by means of aconnectinglink 28 secured by apivot 29 atits inner end to the lever 26n ear thepivot pin 2 'I thereof. It will be observed` that `the relative positions of the handle 26, link Z andlever arm 23 are such that when the handle is raised preparatory `to 'operating the tool by, adownward movement of said handle the crank-portion of said levers (thatis, the respective parts between their pivots and the points at which the link 2 8isconnected) are at that point in the arc o f movement whereby a maximum amount of travel will be imparted to the link 2 8 and Aof course, th e lever arm 23.Y However, the laterally extending. arm22 of the crank I8 is above its arc of maximum travel so that while there may be a n'faximuml amount of movement imparted to the link 28 by the lever 26 there is a: minimumY movementfiinparted by thelever arm 22 to the link 2 4. Therefore, in a sense, the actuating lever 2`Ii`an`d theforce imparting lever 22 lmay be said to be in opposition. The reason for this is to equalizethe: amount of movement between the handle26 and the lever arm 22 so that throughout the greaterpart of the movement of the handle 126 the amount of movement of the block ,Il (or, what amounts to the same thing, the amount of movement of the frame I will beuniform. This is shown'fbythe dotted position in Fig., 1. VThe rstdottedlposition is approximately 45 from theffiillfposition, and the seconddotted position A vhandle lever is approximately 45 from the first dotted position, and while the operating handle is moving through these respective arcs the frame I in each instance will move a distance indicated by the dimension zr. However, for the last 45 of movement shown in Fig. 2 the point of connection between link 28 and lever 26 passes a dead center and the amount of movement of the frame will be somewhat reduced. This is one of the objects sought to be accomplished by Athe arrangement of link and lever connections adopted by me, because .near the end of the lever arm movement the 'spring S has already been considerably compressed an'd the greater amount of leverage is desirable on account of the increased resistance of thespring. During the same amount of movement from the rst dotted position shown in Fig. 2` tothe second dotted position when the operating lever 26 has reached the end of its travel the pivotal'connection 29 passes the center of its rotation (which is the pivotpin 21) and, of course, the leverfbecomes locked in this position so that it cannot accidentally bedisplaced. From the foregoing it should beapparent `tha the arrangement of the actuating parts, including the position of the handle lever 26, when said lever has been moved to itsfull extent downwardly, greatly facilitates `the operation ofthe tool by the mechanic. For instance, he may hold the frame i with his right hand, includingin his grip .the handle 26, while' his left handisg free to removethe lock L which releases the valve V so that it may be lifted out .of the block.. It should also Abe apparent that when the. lever 26 ,ap-1 proaches rits lowermost lposition the stressesv `on the tool are greatest and the forceapplied to the handle comes almost directly opposite the lower end of screw I3 (the point of anchorage), reducing toa minimum any torsional strains on the frame I. f

Having Ydescribed my .inventiom I claim:

1. In a valvelifter the combination of a handle frame, a guide nuernber-` disposed :transversely at one end of the frame, a valveengaging member slidinglymounted in-said guide for co-action withthe frame, a block adjustably mounted on said valve engaging member, l.ya bell-crank mounted on the frame in close proximityto said guide member, a handleleverpivotally mounted on the framegat a point spaced'inwardly from the bell-crank lever, a connecting link ybetween said block'and theupperzarm of the bell-crank lever, V and ag second connecting link between the lower arm ofthe bell-crank'leverand'the handle lever, the points of connection of the links vwith the respective levers being such that the -rst link will-move substantially along a verticallinefand the-second along a-horizontalline.V u 2, Ina valve lifter the combination o a handle frame, a guide member Adisposed transversely at one ,endof theframe', a valverengaging member slidingl-y mounted in saidguide for co-action with the frame, a vblock adjustably mounted onsaid valve engaging member, a bell-crank -mounted on therrame adjacent to said'guidemember, a handle Ilever pivotally mounted onthe frame at a point spaced inwardly from the'bell-crank lever, a connecting link between said block and the1upper arm of thefbellcrank lever, and a secondconnecting link between the lower Aarm of the bell-crank lever and thewhandle lever, the' of the second link and handle lever moves toward dead center.

3. In a valve lifter the combination of a handle frame, a guide member disposed transversely at one end of the frame, a valve engaging member slidingly mounted in said guide for co-action with the frame, a block adjustably mounted on said valve engaging member, a bell-crank mounted on the frame adjacent to said guide member, a handlelever pivotally mounted on the frame at a point spaced inwardly from the bell-crank lever, a connecting link between said block and one arm of the bell-crank lever, and a second connecting link between the other arm of the bell-crank lever and the handle lever, the points of connection of the links with the respective levers being such that when the first link operates at approximately 90 from the dead center of its crank, the second connecting link operates across the dead center of the handle lever arm to which it is connected.

4. In a valve lifter the combination of a handle frame, a guide member disposed transversely at one end of the frame, a valve engaging member slidingly mounted in said guide for co-action with the frame, a block adjustably mounted on said valve engaging member, a bell-crank mounted on the frame adjacent to said guide member, a handle lever pivotally mounted on the frame at a point spaced inwardly from the bellcrank lever, a connecting link between said blockv and one arm of the bell-crank lever, and a second connecting link between the other arm of the bell-crank lever and the handle lever, the points of connection of the links with the respective levers being positioned so that when the link between the two levers moves rapidly the link between the bell-crank lever and the block will move slowly.

JOSEPH SUNNEN.

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