US1718120A - Valve lifter - Google Patents

Description

S. J. DENTON June 18, 1929.

VALVE LIFTER INVENTOR.

ATTORNEY 2 Sheets-Sheet Filed June 4, 1928 .s lll Y Ju`n`e 18, 1929. s, BENTON 1,718,120

VALVE LIFTER Filed June 4, 1928 2 Sheets-Sheet 2 Patented June 18, 1929.

uNrrED STATES SHERMAN J. DENTON, OF LA JUNTA, COLORADO.

VALVE LIFTER.

Application filed .Tune 4, 1928;

This invention relates to valve-lifters of the type used on engines of motor vehicles to remove the valves thereof for renewal, adjustment or repair, by releasing them from the pressure of their springs.

It is an object of the invention to provide a tool of the above stated character which in the operative movement of a pair of hand levers compresses the .spring by pressure exerted upon an end` thereof through the separation of cooperative jaws with which the levers are associated. Another object of the invention resides in providing a novel and practical means lfor the operative connection of the levers of the tool with one another and with shank-members upon which the jaws proper are detachably mounted. A further object resides in the provision of a novel means for locking the jaws in place on their shanks without the use of bolts or screws, and independent of other parts of the tool, and still another object' is found in the provision of novel and eiiicient means for locking the levers together whereby to secure the jaws ,in their separated positions. l

rlhe above and other objects mostly relating to details of constructionand the arrangement of the parts of which the tool is composed, will be fully brought out in the course of the following description with reference to the accompanying drawings.

In the drawings in the several `views of which like parts are similarly designated,

Figure l represents a sectional elevation of the tool; Y

Figure 2, a fragmentary elevation similar to Figure l, showing the jaw-members of the tool in the position in which they are closed together prior to their operative movement,

Figure 3, a partially sectional. top-view of one of the shank-members and the therewith rection of either of the arrows A in vFigure l Figure 4,' a section taken on the line l-4, Figure l;

Figure 5, a transverse line 5-5, Figure l;

Figure 6, a section on the line 6 6, Figure l;

Figure 7, a perspective view of one of the jaw-members of the tool, and

Figure 8, an elevation of the tool in its operative condition with relation vto the section along the Serial N'o. 282,804.

hereinafter be more fully-explained, are pvotally connected with crossed-. lever members 8 and 9 as at 7. The levers are pivoted together at 10 and one of the levers is composed of two members 8'a and 8c pivoted together at a point coincident with the pivot point 7 of the respective jaw-member. The long arms of the lever which constitute the operating handles of the tool are further connected by alink l2pivoted at both ends, that provides a fulcrum for thelong-member 8 of the jointed lever 8, additional to and cooperative with the fulcrum l0 of itsshorter member 8c with the other lever 9.

Pivoted links 13 connect the eXtreme ends of the short arms of the levers with the shank members, and -cooperate with the pivots-7 at the ends of the shanks to support the Shanks and maintain them in substantially parallel relation to each other. n

The links move in longitudinal slots 14 of the shanks which, as well as the levers, are preferably made of channel-section. s In the construction shown in the drawings, the links are pivoted at their outer ends to lugs on strips l5 which are riveted to the shank-members at opposite sidesY of their slots. This, however, is a merc feature of convenience in manufacture and the links may be otherwise pivoted on the shanks if so' desired.

The jaw-members 6 of the tool hereinbefore referred to, consist, as best shown in Figure 7, of a flanged blade of channel section, arovided in its outer-1 portion with a slot (ia to admitthe tappet and valve stem of the engine in the operation of the tool and having at its opposite end, a recess 6c.

,The recessed end of the blade at which it is attached to the respective shank, has slideways formed by iianges 6d extending inwardly from the sides thereof and the flanges are provided `withnotches 6h in alinement with similar notches Gf formed in opposite edges of the recess 6. The pairs of alined notches are the means by which the jaws are attached to their shanks as will now be described.l

The outer or free ends of the Shanks are ilanged to provide reenforcing ribs slidingly itted within the slideways of the aws. In.-

termediate of these ribs is a locking member cooperating with the notches at either side of the jaw to secure the latter in place. The locking member comprises a dog 1G pivoted at 17 by means of a short lug 1Ga movably fitted in a. notch at the end of the shankmember. The dog has a fiat body portion normally lying upon the inside of the shank and it is held in its normal position by a coiled spring 18 on a headed stud 19 extending through an opening in the said body portion of the dog and riveted in an aperture of the shank.

The dog has two detents 16c at right angles to its body portion, that project through slots in the shank for their engagement in the notches of the portion of the jaw' lying against the outer surface of the shank, and the dog has intermediate of its detente a lip 16d projecting outwardly through the beforementioned slot 14 of the shank to provide means for disengaging the detents from the jaw by finger-pressure.

It will be seen that by these means the jaws are readily locked in place on their respective shanks by merely sliding them onto the outer ends thereof, that they may be unlocked and removed by pressure upon the lips of the dogs; that owing to the provision of two pairs of notches at opposite sides of the jaws, the latter may be reversed if so desired, and that jaws of different sizes and proportions may interchangeably be applied to the tool, for the compression of springs on valves of varying forms and proportions. f

The element by which the levers are locked together in order to hold the jaws apart at any distance to which they were moved by pressure upon the long arms of the levers, comprises two bell-crank shaped locking members 20 lying side by side and fulcrumed to move about a common axis preferably provided by the same pin 21 that constitutes the pivotal connection between the link 12 and the jointed lever o. The bell cranks having ratchet teeth QOfL cooperating with a transverse pin 22 in the channel of the lever 9 and their teeth are staggered with relation to each other so that the levers may be locked together at distances apart determined by the engagement of the ratchet teeth with the pin at fractions of their interdental spaces.

Coiled springs 23 fastened at the ends of the short arms of the bell-cranks 2O extend longitudinally within the channel of the member 8a of the jointed lever` 8 and are connected at their opposite ends to lugs 211 on themember to yieldingly maintain the toothed arms of the bell cranks in engagement with the pin 22.

Triggers 25 pivoted on the lever member 9 at 26, have finger-humps 25a projecting through slots of the member, with the object of moving them into engagement with the respective ratchet-bars 20 for the purpose of disengaging the toothed arms thereof from the locking-pin when it is desired to move the leversl of the tool apart after the operation of compressing the valve-spring is completed.

The locking bars 2O are guided in a yoke 27 fastened in the channel of the lever-mem.- ber 9. The yoke reenforces the portion of the member at which the locking pin 22 and the pivot pin 26 of the releasing trigger are fastened thereto7 and it furthermore functions as a stop to limit the movement of the levers to a determinate distance apart when the levers are pressed together in the operation of the tool.

rihe long arms of the levers 8 and 9 are thus prevented from engaging one another and all danger of injury. to the hand of the operator by catching the flesh between the levers, is avoided.

Having` thus described the mechanical construction of the tool, its operation and advantages will be apparent. The jaws applied at the ends of the jaw-members are automatically locked in place, by the springpressed dogs independent of any other part of the tool, and they are readily unlocked for removal, by disengaging the dogs from their notches by finger' pressure upon the projecting lips of the same.

The tool is applied to the spring 28 of the valve-mounting illustrated in Figure 8, by inserting the points of their jaws conjointly in the space between an end of the spring and a relatively fixed part as for example the end of the tappet 29.

The levers 8 and 9 of the tool are now pressed together with the result that the jaws 6 are separatedand the spring is compressed against the shoulder provided by a part 30 of the element of the engine on which the valve is mounted.

The locking element of the tool secures the jaws at distances apart determined by the distances between the teeth of the two locking members and after the valve-spring has been compressed, the cross pin 31 on the valve stem 32 upon which it normally bears through the intermediary of a washer 33,

ments of its parts, reside in theseparative movement of the jaws when the lever-members of the tool are pressed together, the substantially constant parallel position of the jaws during their operative movement, and the increasing leverage exerted upon the tools by the jointed construction ot onevof the lever-members and the two'fulcra provided for the conjointy movement of its 1 prising crossed leversV having Vshort armsV and long arms at opposite sides ot the fnlcrum, one of the levers being jointed, jawcarrying members pivoted on the long arms of the levers, the pivot ot one ot' the members being coincident with the joint ot the jointed lever, pivoted links connect-ing the jaw-carrying members with the short arms of the levers, and a pivoted link between the long arms of the levers.

3. A tool of the character'described comprising two levers one of which is composed of two jointed members of dissimilar lengths, the' short member of the jointed lever and the other lever being ulcrumed in crossed relation to each other, a pivoted link between the long member of the jointed lever and the other lever, j aw-carrying members pivoted on the levers, and pivoted links between the short member of the jointed lever and the corresponding arm of the other lever.

fi. A tool of the character described comprising two levers one of which is composed of two jointed members of dissimilar lengths, the short member et' the jointed lever and the other lever being tulcrumed in crossed relation to each other, a pivoted link between. the long member of the jointed lever and the other lever, aw-carrying members pivoted on the levers, the pivot of one of the jaw-carrying members being coincident with the joint of the jointed lever, and pivoted links between the short member of `the jointed lever and the corresponding arm of the other lever.

5. In a tool of the character described, crossed levers having long arms and short arms at opposite sides ot their fnlcrum, aws connected with the short arms ot the levers, and a locking element comprising a toothed bar pivoted on the long arm of One of the levers and extending away from the fulcrum, entirely within the space between the long arms of the levers, and a pin on the other lever engaged by the bar.

6. In a tool of the character described, crossed levers having` long arms and short arms at opposite sides of their fulcr'um, jaws connected with the short arms ofthe levers, and a locking element comprising a toothed bar pivoted on the long arm of one ot the levers and extending away from the fnlcrum, entirely within the space between the long arms of the levers, a pin on the other lever engaged by the bar, and aspring to yieldingly maintain said engagement.

7. In a tool or" the character described, crossed levers having long arms and short arms at opposite sides of their ulcrum, jaws connected with the short arms ot the levers, and a locking element comprising a toothed bar pivoted on the long arm ot one of the levers and extending entirely within the space between the long arms ot the levers, a pin on the other lever engaged by the bar, and a spring to yieldingly maintain said engagement.

8. In a tool of the character described, rossed levers having long arms and short arms at opposite sides ot their; tulcrum, jaws co-nnected with the short arms of the levers, and a locking element comprising a bell-crank pivoted on the long arm of one of the. levers and having a toothed arm extending in the lspace between the long arms vof the j levers, a spring extending lengthwise with relation to the `longarm of one of the levers in connection with v.the short arm of the bell crank, and a pin on the other lever, engaged by the toothed arm of the bell crank.

9. A tool of the character described comprising crossed levers having short arms and long arms at opposite sides oi their ulcrum, one of the levers being joint-ed, jaw-carrying members pivoted on the long arms of the levers, pivoted links connecting the jaw-carrying members with the short arms of the levers, a pivoted link between the long arms of the levers, a toothed locking-bar pivoted on the long arm of the jointed lever at a point coincident with the joint thereof, and a pin on the othcrlevcr engaged by the locking bar.

l0. A tool of the character described comprising crossed levers, and a locking element comprising two ratchet bars independently movable about a common pivot on one of the levers, their teeth being staggered with relation to each other, and a pin on the other lever engaged by the ratchet bars.

11. A tool of the character described comprising crossed levers having short arms and long arms at opposite sides of their fulcrum, and a locking element comprising a toothed bar pivoted on one ot the levers and extendllO ing entirely within the space between the long arms of the levers; a pin on the other lever engaged by the bar, said other lever having a slot, and a trigger on the last mentioned lever, extending through said slot and adapted to disengage the bar from t-he pm. v

12. A tool of the character described comprising crossed levers having short arms and long arms at opposite sides oi' their fulcrum, and a locking element comprising a toothed bar pivoted on one of the levers and extending entirely within the space between the long arms of the levers, a pin on the other lever engaged' by the bar, and a pivoted trigger on the last mentioned lever, adapted to disengage the bar Jfrom the pin.

13. A tool of the character described comprising crossed levers havino' short arms and long arms at opposite sides of their fulcrum, a locking bar pivoted on one of the levers and extending away from the fulcrum withing the space between the long arms of the levers, and a pin on the other lever, engaged by the locking-bar, the bar having ratchet teeth the shoulders of which face away from its pivot to engage the pin.

14. In a tool of the character described, a shank-member, a jawmember having notched slide ways to admit an end of the shank; member, and a spring-urged dog on the shank-member adapted to automatically engage in the notches of the aw-member at a determinate point of a sliding motion oi one detents to automatically engage in the notches of the jaw-member at a determinate point in a sliding motion of one member relative to the other.

1G. In a tool of the character described, a shank-member having apertures, a pivoted spring-pressed dog having ratchet teeth projecting through said apertures, and a jawmember having slide-ways' to admit an end of the shank-member, and having notches at edges of the slide-ways to admit the teeth of the dog.

17. In a tool ot the character described, a shank-member having apertures, a pivoted spring-pressed. dog having ratchet teeth projecting through apertures of the shank* member and a lip projecting through another aperture o't' the same, and a jaw-inember having slide-ways to admit an end of the shank-member, and having notches Vat edges of the slide-ways to admit the teeth of the dog.

18. In a tool of the character described. a

shank-member, a jaw-member having slide- SHERMAN J. DEN'ION.

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