US2311956A

US2311956A - Valve tool

Info

Publication number: US2311956A
Application number: US398759A
Authority: US
Inventors: Andrew E Miller
Original assignee: Individual
Current assignee: Individual
Priority date: 1941-06-19
Filing date: 1941-06-19
Publication date: 1943-02-23
Anticipated expiration: 1960-02-23

Description

Feb. 23, 1943. A. E. MILLER 2,311,956

VALVE TOOL Filqd June 19, 1941 Patented Feb. 23, 1943 UNETED STATES ear r; r

4 Claims.

This invention refers to the valve mechanism of internal combustion engines and the like, and more particularly to a tool or device for manipulating valve heads and stems, so they may be readily assembled, inspected or repaired. It has among its objects to provide a tool adapted to be quickly installed on the body of an engine and adjusted to control the valve heads and stems therein; to have such tool portable, light, simple in construction and arranged to utilize parts or portions of the engine for its attachment thereto; and to have its attachment arrangements and mechanism for handling and use on the complete set of valve heads and stems of poly-cylinder engine by a single individual, without requiring undue strength or effort. Another object is to provide arrangements for adjusting its placement to suit the tension of the engine parts or their positions.

Other objects will become apparent as the invention is more fully set forth.

' The matter of removing or replacing valve heads and stems of a conventional internal combustion engines, in the customary manner, requires considerable effort, careful manipulation, and involves danger to the operator. The tension of the various springs acting on each of the stems is substantial. For four and six cylinder engines, the valve heads and stems are eight and twelve respectively and are proportionally increased in total tension. The operator is unable to handle more than one valve head at a time, and this is usually done in an inconvenient and tedious manner. This invention consists of a tool or device that enables the user to attach it in a few moments on the engine. Then with the manipulation of a handle and the tightening of a few parts to set it properly in place, in control of the valve heads and stems, ready to permit any desired work to be done thereon, without further attention to the tool or device. The device overcomes the tension of the springs readily and pushes the heads and stems down to suit the work to be done on them. The engine may be rotated to bring different values in various positions without affecting the efficacy of the device or requiring any change or adjustment therein. The tool is kept in place, during the whole process of fixing the engine, and when the work is done may be quickly removed.

In the drawing which illustrates an embodiment of this invention:

Figure 1 is a view in perspective of a valve holding tool embodying this invention.

Figure 2 is a side elevation of the valve holding tool; shown mounted on an engine block.

Figure 3 is an end elevation of a. modified form of the tool, using an angle frame.

Figure 4 is an end elevation of another modified form of this invention; using resilient material.

Figure 5 is another modification using a flat plate frame with an integral handle.

Similar reference characters refer to the same parts throughout the drawing.

In the drawing, 1 represents an engine block partly broken away to show the attachment of and use with of a valve holding tool 2. This tool or device consists in the preferred form of construction for the same, of a channel or other conventional angle-iron piece 3 having its flanges 4 pending downwardly, and with lugs 5 at the sides. These lugs are provided with holes 01. slots 6 which enable the lugs to fit on conventional studs 1 threaded into the bolt holes 8 of the engine block. There are a number of these bolt holes that are available for use distributed over the face of the engine block, but for this purpose, those near the front and back portions are preferred. When the lugs are in place the long hexagon nuts 9 are threaded on to fasten the channel in place, over the valve heads ill and stems H projecting from same into the engine valve openings I2 and passages l3 on to the operating cams I4. The usual springs 15, with the pins I6 and Washers I! are also included.

A suitable number of coil springs l8, attached to the under side of the channel by clips l9 punched out from the latter and bent over the wire to hold them securely in place. Their position between the flanges 4 keeps them guided and prevents their buckling up when under pressure from the valve heads, when the device is being used practically. The springs are longer than the flanges and are tensioned sufliciently to bear hard on the valve heads which they align with respectively. Yet not so hard as to prevent the valves being raised off their seats 20, when the crank shaft is turned. The tension of the springs I8 is intended to become neutral in resistance, so the operator can fix them, grind the seats or perform any other work in their connection. In order to place the channel on and align its springs I8 with the heads of the valve and place the nuts 9 in position to be screwed down, without difficulty, a lever arm 2| is provided. This lever arm has a slot 22 in its central portion to allow a holding stud 23 to hold it and also allow a longitudinal movement and a rotary travel. Then end portion 24 is arranged with an L-shaped jaw 25 adaptable for engagement with the head of a bolt 26 or other suitable part of the engine that will afford a fulcrum for the handle to give the necessary leverage to force down the channel against the block face. The lever is preferably installed near one end, so that the channel can be started on the studs at the other, and when sufiiciently mounted so it will stay on that end, then pressed down at the other end against the resistance offered by the springs. This has the efiect of making the channel react as a lever itself with the studs holding it as a fulcrum.

When the channel is held down properly, with its springs pressing on the valve heads so the pressure of the valve springs reacting on the stems and heads is overcome, the pin or other arrangement in the stem cooperating with them; may be removed easily, and the stem and valve loosened ready to be taken out. valve stems are loosened, the channel is taken oif the studs and the valve parts lifted out, and the grinding process proceeded with. The position of the cams on. the cam shaft makes it necessary to rotate the crank to bring each valve head up, so the device can. exert the pressure of its respective coil spring on it, and thereby loosen. the stem and permit the pin to be removed. When this is done the valve head and stem is ready to be taken out, whenv the channel is moved off the block. The pressure exerted by the springs. of the device is not great enough to prevent. the valves to. be raised, but.

isin excess. of the springs of the stems so as toneutralize thev latter.

The nuts 9 are made long to allow the wrench usedto work same. more readily. They extend above thechannel to the wrench. Studs are used in this example, as they are convenient to employ for the purpose and aiford a practicalprojection on whichto work the device and get the desired reactive resistance to the springs tending to raise the channel.

Figure 3 indicates a. modified construction where the angle member 43 is used in place of the channel described previously. In this case the lever arm can be run through slots 44 in the apex of the angle.

Figure 4 utilizes a flatmetal bar 50, and avoids the use of lugs for the studs to connect to.

Figure 5 utilizes a resilient material 60, in place of the coil or other type of spring, and for some instances where the device would be more suitable or. economical. be. of rubberorsimilar plastic cementedonto the bar rigidly. The form-of the member. 50 is shownas aflat plate, for reasons of simplicity. Fig.5- has an. integral handle 5l in place of the leverZi for exertingforceto mass the device I, on the last. pair of bolts.

While several forms. of the invention are. indicatedin. the drawing. anddescribed in the speci- When all the The material may a engine, and a handle fication, it is not desired to limit this application to such constructions or in any other way, otherwise than limited by the scope indicated, as it is appreciated that other structures could be made using the same principles and coming Within the interpretation of the claims.

Having thus described the invention, what is claimed is:

1. A valve tool of the class described comprising in combination, an angle piece having holes therein adapted to pass over studs mounted on the body of a conventional internal combustion engine, springs secured to the angle piece and operating between the flanges thereof and proiecting, said springs being adapted to resiliently contact the valve heads of the said engine simultaneously, nuts adjustable on the studs for holding and impressing the angle piece thereon, and keeping pressure on the valve heads, and means for facilitating the removal or placement of the angle piece and springs against the said valve heads said means being attached to the angle piece and. adapted to operate on the upper portion. of the body.

2. A valve tool. of the. class described, comprising in combination, a member having holes therein for mounting the same on predeterminedexternal portions of an internal combustion engine, springs attached to the-member adapted to align. with the valve heads of engine, when.

predetermined external pormounted. on said tions to contact the same, and permit the valve heads with. their stems to be'operated on and neutralized.

3. Avalve holding device comprising in combination, a rigid member adapted to align over the. valve heads and stems of an internal combustion engine, resilient elements mounted onthe member arranged to align with the valve heads and exertpressure thereon when: in position over same, means attachable toone of the holding bolts of the block for adjustably securing the member and elements in place and permittingthe valve heads and stems to be neutralized so they may be loosened from the engine.

4. A valve head and stem holder comprising incombination a frame having attachments thereon. for adjustably securing it to an internal combustion engine, a plurality of resilient mem bers fastened to the frame adapted to engage the upper surface of the valve heads and neu'- tralize their normal tension to permit detachment of, the valve heads and stems from the extending from the frame having a slot adapted to slip under a projectingportion on the upper portion of the engine away from the. valve mechanism and heads for providing leverage. for the forcing of the frame and members towards the engine while attaching same thereto.

ANDREW E. MILLER.