US1726958A - Valve-spring-lifting tool - Google Patents

Description

Sept. 3, 1929. F. s. JOCHUMSEN 1,726,958

VALVE SPRING LIFTING TOOL Filed July 24, 1928 7 5, ZNVENTOR Patented Sept. 3, 1929.

UNITED STATES FREDERICK S. JOCHUMSEN, OF PITTSBURGH, PENNSYLVANIA.

VALVE-SPRING-LIFTING TOOL.

Application filed July 24,

My invention relates to tools employed for lifting or compressing the springs of the valves of internal combustion engines and the like, so that the spring abutment pins may be removed from the valve stem to permit the valve to be lifted out.

My present purpose is to provide a tool which will accomplish the operation of compressing the valve springs and holding them retracted, for the removal or insertion of the abutment pins, with greater speed and convenience.

In general my improved tool is of the following construction. I provide a bent bar whose one end, hereinafter termed the lower end is bent at substantially right angles and provided with a fork which straddles the valve stem and bears against the spring washer; a head mounted on the bar and having pivotally connected thereto parallel links Whose outer ends carry a pin member which bears on the head of the valve; an eccentric roller rotatable on an axis fixed relative to the head and working between said parallel links, and means for manually rotating the roller.

I provide. means for adjusting the head along the-bar so as to accommodate the tool to different sizes and designs of engines.

I also provide means for preventing rotary movement between the head and the bar, thereby maintaining the proper alinement between the pin member and the forks.

Other novel features of construction and arrangement of parts will appear from the following description.

In the accompanying drawings, wherein I have illustrated a practical embodiment of the principles of my invention, Fig. 1 is a side elevation showing my tool applied ready to compress the valve spring.

Fig. 2 is a similar view showing the spring compressed.

Fig. 3 is a top plan view of the tool.

Referring to the drawings, 1 represents a valve seat in which is seated a valve 2 having its stem 3 extending across the chamber 4 and through a hole in the inner or back wall 5 of the chamber.

The valve is held in the seat in the usual manner, by a helical spring 6 coiled about the stem 3, one end of the spring bearing against the wall 5 and the other end against a washer 7 riding on 55 bearing against the abutment pin 8 which is the valve stem and 1928. Serial No. 295,113.

driven into a hole through the stem 8. I

My improved tool is of the following construction.

The bar 9 is provided with one end, which I term the lower end, bent at substantially right angles to the body of the bar and provided at its extremity with the twin fingers or fork 10 which straddles the stem 3 and fits against the outer or lower face of the washer 7.

The body or vertical portion of the bar 9 has slidably mounted thereon the head or bracket 11 which is prevented from rotating relative to the bar, as by its lip 12 which engages a longitudinal slot 13 in the bar.

The bar is provided with transversely disposed holes 14 at spaced intervals and the head 11 is provided with a pair of registering holes.

The head is adjusted to the proper height to suit the purpose and the pin 15 is inserted through the holes in the head and the bar, thus fixing the head in position on the bar.

16 and 17 represent upper and lower pairs of parallel links having their one ends pivotally connected to the head 11 and having their other ends pivotally connected to the pin member 18 whose lower end is tapered to engage the head of the valve 2 which is usually provided with a shallow socket 19 for this purpose.

20 represents a pair of parallel bars whose one ends are rigidly fixed to the head 11, and which extend outwardly between the upper and lower pairs of parallel links.

Between the bars 20 is mounted the roller 21 rigidly and eccentrically mounted on an axle 22 which is journaled in said bars 20. One end of the axle is provided with the hand crank 23.

The roller 21 is provided with a central perimetral lip 24 which fits between the members of the pairs of parallel links and on either side of such lip with an annular bearing surface 25 which bears on the parallel bars as shown in the drawings.

WVhen the eccentric roller is retracted as shown in Fig 1, the tool may be positioned as shown in Fig. 1 with its fork 10 straddling the stem 3 and beneath the washer 7 and the pin member 18 in contact with or just above the head of the valve.

By then rotating the eccentric roller into the position shown in Fig. 2, with the cam extending diametrically thrown as shown, the lower end of the bar 9 will be raised, causing the fork 10 to compress the spring 6 and lifting the washer off the abutment pin 8, so that the latter may be driven out and the valve lifted out.

l Vhen the valve is to be installed, it is first put in position, the spring 6 and the washer 7 mounted on the stem, and my tool is then employed to compress the spring and lift the washer so that the abutment pin may be put in place.

The tool is then retracted and removed and the spring expands to press the washer against the abutment pin.

it will be noted that, due to the parallel link connection between the head 11 and the pin member 18, the movement of the latter is'always parallel with the axis of the links connection to the head and also in alinement with the axis of the valve and its stem.

It is evident that my improved tool is convenient and easy to operate. It is quickly adjustable to suit any engine and valve arrangement. It is powerful and quick acting, but Contains no parts subject to material wear or likely to become broken or impaired.

its simpleconstruction enables it to be manufactured and sold at a relatively small price.

It is compact and may be stored in a small space.

What I desire to claim is 1. A valve-spring lifting tool comprising a'bar having one end bent and provided with a fork to straddle the valve stem and engage the spring-washer, a head mounted on the bar, spaced parallel links pivotally connected atone end to the head, a pin member pivotally mounted on the other ends of the links and arranged to engage the head of the valve, an eccentric roller mounted on an axis fixed relative to the head and interposed between the spaced parallel links to vary their angularity relative to the head, and means for rotating said roller.

2. A valvespring lifting tool comprising a bar having one end bent and provided with a fork to straddle the valve stem and engage the spring-washer, a head mounted on the bar, spaced parallel links pivotally connected at one end to the head, a pin member pivotally mounted on the other ends of the links and arranged to engage the head of the valve, an eccentric roller mounted on an axis fixed relative to the head and interposed between the spaced parallel links to vary their angularity relative to the head, means for rotating said roller, and means for adjusting the position of the head along the bar.

A valve-spring lifting tool comprising a bar having one end bent and provided with a fork to straddle the valve stem and engage the spring-washer, a head mounted on the bar, two pairs of twin parallel links pivotally attached at one end to the head, a pin member pivotally mounted on the other end of the links and arranged to engage the head of the valve, an eccentric roller mounted on an axis fixed relative to the head and positioned between and in engagement with said pairs of parallel links, and means for rotating said roller.

4. A valve-spring lifting tool comprising a bar having one end bent and provided with a fork to straddle the valve stem and engage the spring-washer, a head mounted on the bar, two pairs of twin parallel links pivotally attached at one end to the head, a pin member pivotally mounted on the other end of the links and arranged to engage the head of the valve, an eccentric roller mounted on an axis fixed relative to the head and positioned between and in engagement with said pairs of parallel links, means for rotating said roller, said head being slidable on said bar, and means for fixing the head relative to said bar.

5. A valve-spring lifting tool comprising bar having one end bent and provided with a fork to straddle the valve stem and engage the spring-washer, a head mounted on the bar, two pairs of twin parallel links pivotally attached at one end to the head, a pin member pivotally mounted on the other end of the links and arranged to engage the head of the valve, an eccentric roller mounted on an axis fixed relative to the head and positioned between and in engagement with said pairs of parallel links, said roller having a perimetral portion which enters between the members of the pairs of links, and means for rotating said roller. i 6. A valve-spring lifting tool comprising a bar having one end bent and provided with a fork to straddle the valve stem and engage the spring-washer, a head mounted on said bar, upper and lower parallel links pivotally connected at one end to the head, a pin member pivotally supported on the other end of said links and arrangedto engage the head of the valve, an eccentric roller mounted on an axis fixed relative to said head and interposed between and engaging said links, and means for rotating said roller.

7. A valve-spring lifting tool comprising a bar having one end bent and provided with a fork to straddle the valve stem and engage the spring-washer, a head mounted on said bar, upper and lower parallel links pivotally connected at one end to the head, a pin member pivotally supported on the other end of said links and arranged to engage the head of the valve, an eccentric roller-mounted on an axis fixed relative to said head and interposed between and engaging said links, and means for bar.

8. A valve-spring lifting toolcomprising a bar having one end bent and provided with a fork to straddle the valve stem and engage the spring-washer, a head mounted on said bar, upper and lower parallel links pivotally connected at one end to the head, a pin member pivotally supported on the other end of said links and arranged to engage the head of the valve, an eccentric roller mounted on an aXis fixed relative to said head and interposed between and engaging said links, means for rotating said roller, and means for preventing relative rotation between said head and said bar.

9. A valve-spring lifting tool comprising means for rotating said roller, shifting said head along said a bar having one end bent and provided with a fork to straddle the valve stem and engage the spring-Washer, a head mounted on said bar, upper and lower parallel links pivotally connected at one end to the head, a pin member pivotally supported on the other end of said links and arranged to engage the head of the valve, an eccentric roller mounted on an axis fixed relative to said head and interposed between and engaging said links, means for rotating said roller, means for preventing relative rotation between said head and said bar, and means for shifting said head along the bar.

Signed at Pittsburgh, Pa, this 20th day of July, 1928.

FREDERICK S. J OCHUMSEN.

Images