US1982867A - Valve operating mechanism - Google Patents

Description

Dec. 4, 1934. s. E. HALL VALVE OPERATING MECHANISM Filed June 8, 1933 2 Sheets-Sheet l is HaL inventor one of the valves and a Patented Dec. 4, 1934 UNITED STATES PATENT 1,982.86? t Y VALVE OPERATING MECHANISM Stephen Edgar Hall, Concord, N. assignor of one-half to George G. Lee, Concord,- N. H.

Application June 8, 1933, SerialNo. 674,931

2 Claims. (01. 123-90) Thisinvention relates to mechanism for operating the valves of internal combustion engines.

Heretofore it has been the practice generally to utilize cams for unseating the valves, and mechanism more or less complicated has been required to operate the cams so as to cause the valves to open and close in properly timed relation. 1

It is, an object of the present invention to simplify the mechanism by eliminating the gearing heretofore employed and substituting therefor a liquid forcing means whereby the proper action of the valves can be effected. I

1 A still further object is to provide valve mechanism adaptable to all types of internalcombustion engines, the several parts being easily accessible for cleaning and other purposes.

With the foregoing and other objects in view whichwill appear as the description proceeds, the

invention consists of certain novel details of construction and combinations of parts herein after more fully ,describedand pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed. J In the accompanying drawings the. preferred form of the invention has been shown.

In said drawings: I Figure l'is a side elevation of a portion of a six cylinder. engine having the present improvements combined'therewith, two cover plates being removed to expose some of the mechanism.

Figure 2 is a vertical transverse section showing portion of the operating mechanism.

Figure 3 is an enlarged section on line 3-3, Figure 2.

Figure 4 is a section on line 44, Figure 3.

Figure 5 is a face view of the operating cam of the liquid forcing means.

Referring to the figures by characters of refer ence 1 designates the engine block which, in the present instance has six cylinders, each provided with an intake 2, an exhaust 3 and spark plug 4. Each intake has a valve 5 and a valve 6 is provided for each exhaust.

The .stem '7 of each valve has its end slidable within one end of a bore 8 and is suitably packed as at 9 to prevent leakage of liquid along the stem. Thus the end of the stem acts as a piston and the bore in which it is mounted serves as a cylinder. A spring 10 can be mounted on the stem for thrusting against a collar 11 so as to hold the valve normally upon its seat.

. The bore 8 can open through the side of the crank case 12 and it is to be understood that one of these bores is provided for every .one of the valves 5 aud o, the several bores being indicated by dotted lines at 8 in Figure 1. The "space in 60 which the springs 10 are located can be closed by removable plates 13 so that access to. the springs'and valve stems can be had readily.

Theengine shaft has been indicated at 14 and "the cranks 15 thereof are connected by rod 16 65 in the usual way to the respective pistons 17.

A worm gear 18 rotates with shaft 14 and operates a worm gear 19 on a shaft 20. These gearsare preferably timed so that two rotations of shaft 14 a will produce one rotation of shaft 20. 7

Secured to the sideof the crankcase 12 is a plate 2l having an outwardly extendedboss or enlargement 22 in which is formed a bore 23 the ends of which are counterbored as shown at 24 1 and 25. Shaft has itsend axially disposed within the bore and secured to this shaft so as to rotate within the bore 23 between the two counterbores is a cam 26 comprising a disk on each face of which is a raised portion 27 having inclined shoulders 28; These raised portions are 80 diametrically opposed although located on opposite faces of the disk. 7 i

Secured in the outer end of .the counterbore 24 is a head 29 having angular bores 30 there- 1 in each ofwhich opens atone end through. the periphery-of the head into a passage31 in plate 21 and which passage leads to one of the ports 8. The other end of each bore 30 opens through the inner face of head 29 and registers with one end of a bore 32 extending through a block 33 which is seated snugly within counterbore 24 between the inner end of said counterbore and the head 29. The block and head are held against rotation by dowels 34 and the bores 32 are regularly spaced, one of them being provided for the intake of every cylinder.

Seated in the other counterbore 25 is a head 35 having angular bores 36 each of which opens at one end through the periphery of the head and {"5 communicates with a passage 37 extending to one 100 of the bores 8. The other end of each bore 36 opens through the inner end of head 35 into a bore 38 extending through a block 39 which is seated snugly in the counterbore 25 between the inner end thereof and the head 36. The block and head are joined by dowels 40 or the like so that when the head is rotated, block 39 will move therewith. A limited annular adjustment of head 35 is permitted by the provision of short slots 41 through which clamping bolts 42 extend.

One bore 36 and its alining bore 38 is provided for the exhaust valve of each cylinder and the bores 38 are regularly spaced and positioned with their axes arranged along lines extending between the bores 32. This will be apparent by referring to Figure 3.

Mounted to reciprocate freely within each of the bores 38 is a plunger 43 and similar plungers 44 are mounted for free reciprocation within the respective bores 32. These plungers are adapted to bear against opposite facesof the. cam disk 26 and the spaces in the several bores and passages between plungers 44 and the stems of the intake valves 5 are filled with a noncompressible liquid while a similar liquid fills the bores and passages between plungers 43 and the several stems of the exhaust valves 6.

As before stated the shaft 20 will. rotate. once during two revolutions of shaft 14.' The raised faces 2'7 of cam disk 26 are located where they will actuate the plungers 43 and 44 in properly timed relation so as to force the liquid in the paths thereof against the ends of" the stems 'l to insure opening and closing of the intake and exhaust valves of the several cylinders at the proper times during the cycle of operation. The actuation of the exhaust valves can be advanced or retarded relative to the actuation of the intake valvessimply by loosening the head and rotating it and its block 3-7- in a clockwise or a counterclockwise direction. Thereafter bolts 42 can be tightened.

It is preferred that the cam rotate in liquid. l his liquid can be supplied thereto through suitably arranged ducts 45 and other ducts 45 can convey lubricant to the plungers as shown. This liquid in ducts" 45- under slight pressure will insure the proper filling of the bores 31. 36 and '37.

What is claimed is;

1. In an internal combustion engine the combination with intake and exhaust valves, of a member having bores therein, stems projecting from the valves and working withinthe respective bores to constitute pistons, a member'having a bore, spaced blocks secured within the bore, each block having bores extending therethrough, plungers mounted for reciprocation within the respective block bores, all of; the plungers being movable along parallel lines, a disk mounted for rotation between the blocks, and having opposed cam faces for wiping engagement with the plungers in the respective blocks thereby to shift the plungers longitudinally in a predetermined timed relation, means actuated by the engine for rotating the disk, heads closing the ends of the bore in said member and connected to the blocks, there being bores Within the heads for communication with the bores in the respective blocks, there being passages in the member extending from the bores in the heads to the bores in which the valve stems are seated, said passages and the bores communicating therewith constituting means for holding power transmitting fluid, each of the heads and the blocks connected thereto being adjustable annularly to adance: or retard the actuation of its plungers without cutting off communication between the bores in the head and the passages in the member.

2. aninternal combustion engine the combination with intake and exhaust valves, of a member having bores therein, stems projecting from the valves and working within the. respective bores to constitute pistons, a member having a bore, spaced blocks secured within'the bore, each block having bores extending therethrough, plungers mounted for reciprocation within the respective block bores, all. of the plungers being movable along parallel lines, a disk mounted for rotationbetween the blocks and having opposed cam faces for wipin engagement withthe plungers in the respective. blocks thereby to shift the plungers longitudinally in a predetermined timed relation, means actuated by the engine for rotating the disk, heads closing the ends of the bore in said member'and connected to the blocks, therebeingbores within the heads for communicationwith the bores in the respective blocks, there being passages in the member extending from the bores in the heads to the bores in which the valve stems are seated, said passages and the bores communicating transmitting fluid, each of the heads'an'd the block connected thereto being adjustable annularly to advance or retard the actuation of its plungers without cutting off communication between the bores in the head and the passages in the member, and means co perating with the member and each ofthe heads for securingsaid heads against rotation relative'to'the'member, said heads and their blocks constituting bearings for the shaft, o

STEPHEN EDGAR HALL;

therewith constituting means for holding power

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