US1928218A - Lifting type of valve tool - Google Patents

Description

Sept- 1933- A. E. CHURCH 1,928,218

LIFTING TYPE OF VALVE TOOL Filed May 27, 1932 2 Sheets-$heet 2 55 47 45 jg 2 j? Z7 .59 f7 6! 5- 12 54 58A Wz/avrua A. E. CHURCH 4 7' TU NEW Patented Sept. 26, 1933 LIFTIN G TYPE or VALVE 'rooL Arthur E. Church, Portland, Oreg. Application May 27, 1932. Serial No. 613,879

7 Claims.

This invention relates generally to tools for repairing internal combustion engines, and particularly to a lifting type of valve tool.

The main object of this invention is the production of a highly efficient and universal form of valve lifting tool. V

The second object is to produce a valve lifting tool whose jaws move in approximate parallelism at all times.

The third object is to provide the jaws with a slight divergence to off-set lost motion due to clearances in the parts and thereby prevent the accidental slipping of the jaws with relation to the work. I

The fourth object is to provide a valve lifting tool having great leverage and at the same time capable of operating in various portions of a wide range of positions. 1

The fifth object is to produce a valve lifter of the type referred to in which the jaws are interchangeable and off-set in varying degrees for the purpose of making it possible to adapt the tool to a widerange of working requirements.

The sixth object is to provide a tool capable of use in connection with the removing of the tappet assembly. The seventh object is to provide a valve lifter capable of reaching partsordinarily inaccessible. The eighth object is to provide a valve lifter having a wide range of interchangeable jaws adapting the device to use in'connection with anyof the present-day styles of internal combustion engines, as well as other designs not yet on the market. t

The ninth object is to produce a tool which will be found useful in elongating or'compressing helicalsprings in cylindrical or in tapering form. The tenth object is toprovide a unique form of ratchet mechanism adapted to hold the setting of the tool in any one we large number of closely spaced positions, thereby giving theoperator unliinited choice in the setting of the tool and also providing the maximum amount of leverage or mechanical advantage at the moment of greatest 7 showing the tool in a closed position at thecommencement of the spring compressing operation.

Fig.2 is" a longitudinal section through the device showing the parts in position at the completicfi of the spring compressing operation.

Fig. 3 is a section taken along the line 33 in Fig. 1.

Fig. 4 is holder.

Fig. 5 is a perspective view of one of the duplicate upper links. I

Fig. 6 is aperspectiveview of one form of jaw. Fig. '7 is a fragmentary view showing the use of a cam shaft as a support for one of the jaws.

Fig. 8 is a perspective view of the ratchet operating spring.

Fig.9 is a section Fig. 2. g g

Fig. 10 is a section taken along the line 1010 in Fig. 2.

. Fig. 11 is a section taken along the line 11-11 in Fig. 2. r t

Fig. 12 is an end elevation taken along the line 12-12 in Fig. 1.

Fig. 13 is an enlarged section along the line 13 13'in Fig. 10.

Fig. 14 is a perspective view of the device. .S'imilar numbers of reference refer to similar parts throughout the several views.

The device is, of course, usable in any position but for the sake of convenience the terms upper and lower will be employed in its description. Referring in detail to the drawings, there is shown a lower handle member 20 which is channel-shaped in cross section and which is provided a perspective view of the upper jaw taken along the line 99 inwith an enlarged end 21 which serves as a holder for a lower jaw 22, whose shank 23 is adapted to slip into the holder 21 which shank is provided with the inturned lugs 24 whose inner edges 25 are spaced from each other.

Mounted within the jaw holder 21 is a springurged latch 26 which is adapted to engage the inturned mg 2'7 of the jaw' 22 when it is pushed into the holder 21 and serves to retain the jaw in position. The jaw 22 is provided with a slot 28 on its shank 23, which, slot is for clearance purposes.

'The work-engaging end of the jaw 22 is also providedwith a slot 29 adapted to receive the stem 30 of the valve 31 whose tappet 32 rests on the cam 33; The positions of the valve spring 34, the washer '35 and key 36 are also indicated.

Although only one form of jaw 22 has been described in detail, it must be understood that a variety of sizes of these jaws is required to take care of the different conditions encountered in the use of the tool. Certain of the jaws are also offset (asshown in Figs. 2 and 14) for reasons which will be explained later. The amount of off-set also varies in the different jaws, and these jaws are reversible in their respective holders, giving a wide range of relationships between the working faces 3'7 of the lower jaw 22 and the corresponding faces of a similar upper jaw 38.

The upper jaw 38 is shown in Fig. 4 and it also has a channel-shaped end 39 and is provided with inturned lugs 40 which are in turn provided with the extensions 41 whose adjacent faces 42 are spaced from each other. The end 43 of the .upper jaw 38 is somewhat narrower than is the jaw holding portion 39 and is provided with the coaxial holes 44. Against the inner sides 45 of the upper jaw holder 38 are placed the links 46 shown in Fig. 5. Each link 46 is provided with a slot 47, a side notch 48 and a shouldered portion 49. The end of the link nearest the shouldered portion 49 is provided with a hole 50. The opposite end of the link 46 is provided with a tapped hole 51 adapt-v ed to receive the threaded portion of the flat head screw 52 which occupies the countersunk hole 44. The off-set portion 49 engages the lug 40.

A pair of links 53 which are similar to the links 46 are placed insideof the lower jaw holder 21 directly below the links 46. Against the inner side of each link 53 is placed one portion 54 of a slidable frame whose forward end 55 is perforated to receive a transverse pin 56 to which is hinged one end of a lever 57 which intersects with a similar lever 58 and is hinged thereto by means of a pin 59. The pin 59 is approximately mid-way between the ends of the levers 5'7 and 58. The levers 5'7 and 58, for the sake of convenience, each have two pieces which, in the former lever, are in contact with each other and pass between the pieces of the lever 58 (as shown in Fig. 11)

The lower end of the lever 58 is provided with a pin 60 which passes through the hole 50 in the forward end of the link 53. The upper end of the lever 57 is provided with a pin 61 which-passes through the hole 50 in the link 46. The upper end of the lever 58 is provided witha pin 62 which is slidably mounted in the slot 4'7 of the link 46.

The slide members 54'are each provided with a slot 63 neartheir middle portion through which passes a rivet 64 which also passes through the holes 51 in the lower links 53. It will be understood, of course, that it will be unnecessary to tap the holes 51 in the lower links 53, although they are tapped in the upper. links 46, as stated. 1 Also mounted on the rivet 64 is an arm 65 whose upper end is provided with a pin 66 which forms the fulcrum for the upper hand lever'67 whose up-turned end 68 is connected to the pin 62.

It will be seen that a downward movement of the lever 67 will cause a spreading movement of the links 46 and 53 and their attached jaw holders 21 and 39. In other words, the rearmost ends of the levers 5'7 and 58 move longitudinally with reference to the links 46 and 53. Thelon'gitudinal movement of the lever 58 accommodates itself to the movement of the" bent end 68 and the longitudinal movement of the lever 57 is employed to actuate the sliding portions 54 which carries a transverse pin 69, on which pin are mounted a plurality of pawls '70 whose points 71 vary slightly in length from the center of the pin 69. On the end of the lower handle 20 are secured a plurality of stepped plates '72 which are held in position by means of the screw 73.

i Between thesliding portions 54 is'secured a spring holder'74 whose end '75 is turned backwardly to clamp a multiple spring '76 (as shown in Fig. 8) there being as many arms to the spring 76 as thereare pawls 70. The spring holder 74 also acts as'a stop for all of the pawls limiting the upward movement of the points 71. A release bar 77 is pivoted under the lower side of the arm 65 and its forward end '78 extends to the under side of the pawl '70 between their points '71 and the pin 69. The bar '77 is provided with a projection 79 which extends through an opening 80 in the handle 20. Y

The purpose of this construction is to permit the jaws 22 to be moved apart in response to a pressure on the handles 20 and 67 and to be held in a desired position until released therefrom by a pressure of the finger on the projection 79 which would disengage the pawls 70 from the for- 'ward faces 81 of the stepped plates 72.

previously stated, this angularity is sufiicient to insure against the possibility of the jaws becoming disengaged from the work due to necessary clearances between the jaws and their respective holes.

In Fig. '7 is shown an off-set jaw 83 which is in position between a pair of nuts 84 placed on a bolt 85, which bolt 85 is provided with a foot 86 adapted to rest on the surface of the cam 33. The bolt 85, together with the nuts 84 and foot 86, from an accessory for the tool greatly extending its'field of usefulness.

The operation of the device is as follows: Assuming that the operator desires to lift a valve spring for the purpose of removing the key 36 it is first necessary to place the tool in the position shown in Fig. 1, assuming of course that the proper pair of jaws 22 has been selected, the lower one of which passes around the stem 30 and rests on the guide 87, and the upper jaw 22 passes around the stem 30 and engages the under side of the washer 35, the operator has merely to apply pressure to the handles 20 and 67 which causes the jaws 22 to move apart (as shown in Fig. 2) and to be held in this position by the pawls '70 until it is'desired to release same. This is accomplished by merely disengaging the pawls 70, as stated.

If it is desired to apply the tool to a different size or kind of valve assembly but of the type shown in Fig. 1, the operator merely selects the appropriate jaws 22, first removing the one being replaced by releasing the'latch 26 and then withdrawing'the jaw from its holder, and then substituting the desired jaw bypushing it into place which automatically latches same in position.

For the purpose of convenience the latch 26 is attached to its respective link 46 or. 53 as the case maybe.

I claim: V

1; A valve tool of the lifting type consisting of a pair of parallelly'movable jaw holders, a pair of intersecting cross levers mounted between said jaw holders, a jaw mounted in each jaw holder, the end of each cross lever nearest a jaw being hingedly attached to its respective jaw holder, the opposite end of one of said-cross levers being slidably attached to its respective jaw holder and the corresponding opposite end of the second cross lever having attached thereto a slidable frame, a handle forming a guide for said slidable frame and a part of its respective jaw holder, a toggle'lever between the two jaw holders, and a hand lever for actuating said toggle lever together with a ratchet for determining the relative positions of said handle and sliding frame. 7

2. A valve lifter comprising an elwigated handle having a ratchet held slide at one end' and a jaw holding socket at the other end thereof, an upper jaw holder socket disposed adjacent to the socket on said handle, a pair of pivotally intersecting cross links having their forward ends hinged to said jaw holders and one of their rearward ends hinged to said slide and the other rearward end slidably attached to the rearward end of said upper jaw, a link hinged to an intermediate point of said elongated handle, an upper lever fulcrumed at a lower intermediate point to the upper end of said link and having its forward end hinged to the end of said cross link which slides in said upper jaw holder, and valve spring-engaging jaws having shanks mounted within said jaw holding sockets.

3. A valve lifter having a pair of parallel jaw holding sockets one of which has a handle forming an extension of one end thereof, a ratchet held slide guided by said handle, a pair of pivotally connected cross links disposed between said jaw holder and having their forward ends hinged to the forward ends of said jaw holders, a pair of toggle levers disposed between said jaw holders, and an upper handle forming a part of one of said toggle levers.

4. The substance of claim 3, and reversible off-set jaws mounted in said jaw holder.

5. A valve lifter comprising a pair of parallel jaw holders one of which has a handle forming an extension thereof, a ratchet held slide in said handle, each of said jaw holders having a one of said links having its rearward end hinged to. the. forward end of said slide and the other rearward end slidably joined to the rear end of the opposite jaw holder by means of a pin, a pair of toggle levers joining said pin and the rear end of the lower side links near the junction of said lower handle and its jaw holder, and a hand lever for operating said toggle.

6. In a valve lifter, a jaw holder comprising a channel-shaped socket the opposite sides of which converge at an intermediate point to form a narrower channel at one end thereof, the sides of the wide end of said channel having inturned lugs spaced from each other and forming a partial closure for the open side of the channel, a pair of parallel spaced side links within the narrow portion of said channel extending under said inturned lugs, and a jaw having a forked shank slidably occupying the wide portions of said channel on opposite sides of said links.

7. The substance of claim 6, and means for holding said jaw against sliding movement within its holder.

ARTHUR E. CHURCH.

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