US1891803A

US1891803A - Valve spring lock tool

Info

Publication number: US1891803A
Application number: US589369A
Authority: US
Inventors: Falwell Wray
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-01-28
Filing date: 1932-01-28
Publication date: 1932-12-20
Anticipated expiration: 1949-12-20

Description

Dec. 20, 1932. w. FALWELL VALVE SPRING LOCK TOOL Filed Jan. 28, 1932 Patented Dec. 20, 1932 UNITED STATES PATENT orrrcs wnAYIrALwnLL, or Atrsron, MASSACHUSETTS vALvE swam Look "roo'r.

Application sea January as, 1932. Serial no. 589,369..

My present invention relates to valve spring. lock tools, and more particularly to tools foruse in holding in place the valve spring. locking member, sometimes called a 5 key, which holds the valve spring in place under tension in automobile engines and other engines of similar type in which poppet" valves are used for gas intake and eX- haust purposes.

In nearly all looking devices of this na ture there is also provided in combination with the key member, a saddle member which receives the bottom coil of the spring and at the same time prevents the key mer n- 1 ber from being displaced when the valvespring is in operating position.

Whenever it 1s necessary to grind thevalves of an engine of the class above men-1 tioned, the valve spring must be lifted witha valve spring lifting tool and the key re;

moved before the grinding work can be done. In some types of locking members, such as the one illustrated .in the accompanying drawing, the key lock member will fall out easily when the valve spring is lifted, but

the real difliculty comes inreplacing this look member when the valve is reassembled due to the small working, space present and the fact that the locking key must be held 3lli'inplace until the saddle member is seated around it.

'In my present inventionI have designed a 5: which holds the locking member, in place around the valve stem until the spring sad dle member has seated around the locking member;

Still another object is ajvalve spring lock' tool which is automatically displaced by the saddle member when the saddle member has berlome engaged around the lock member;

Other objects and novel features'compris' ing the construction andoperationof my invention will appear as the description of the same progresses.

Referring to the drawing illustrating my" invention; i

Fig. 1 is a vertical cross-section of a valve spring assembly showing the spring coinpressedand the locking member in place being held by the jaws of'the-tool; H

Fig. 2 is a cross-section taken on the line 2-2 of Fig. 1 showing the tool with the locking member in place about the valve stem 1 Fig. 3 is an inner side elevation-of one of the split halves of a locking member Fig. 4 is an inner side elevation of one of jaw portions of th t l; y v

Fig. 5is a plan'view of one of the tool'jaw spring and locking member holders I Fig. '6' is a side elevation of the spring member shown in Fig 5, particularly show ing the normal curved formation of the said spring member, and

Fig. 7 is a side elevation of a modified form of spring.

Referring more in detail to the drawingfso 10 indicates a valve stenraround which is placed a compression spring- 11., The upper end of the compression spring 11, in a ty'pia cal automobile engine, bears against an overhanging" portion of the cylinder b1eck-,:not shown in Fig. 1. The bottom ofpthe valve spring 11 is held by a saddle'member 12 through whichthe valve stem 10' passes; y

In Fig. 1 I have shown the saddle 'an'dv'alvev spring compressed upward as the-case when the valve unit is being assembled. The

saddle and valve spring being held up by means of a valve lifting tool, a portion of the upper jaw of which is indicated at 13. In 5 this position the lower end of the valve stem 10 is exposed, as shown in Fig. 1 so that the split cone locking members 14 may be placed around the annular groove 15 provided on the Valve stem 10 for the purpose.

By an examination of Fig. 1 it will be noted that the saddle member 12 is provided with an upwardly depressed chamber 16, the sides of whichare of. conical formation similar to the sides of the locking members 14 such that when the saddle member 12 is allowed to drop over the locking members 14, the members 14 cannot become dislodged from the valve stem groove 15.

My present invention is principally concerned in a tool to hold the locking members 14 in the valve stem groove 15 while the saddle member 12 is lowered over such locking members. The tool comprises a pair of oppositly opposed jaw members 17, the handle portions 18 of which are ofiset from the jaw portions and crossed in the conventional manner of a pair of pliers, a rivet 19 being provided at the cross over portion on which to pivot the jaws 17.

The jaws 17 are recessed on the inner sides adjacent the working end of the tool as indicated at 20 and adapted to conform to the conical sides of the locking members 14 with particular reference to its lowermost portion.

On the extreme end of the jaw portions 17 and adjacent their inner sides I have provided an extension portion 21 better shown in Fig. '4.

On the lower sides of the jaw members 17 I have placed a flat spring member 22 which is also recessed at 23 similar to the jawportions 17 of the tool except that the recess 23 is of a lesser diameter or radius than the recess 20. At 24 I have provided an opening through which rivets 25 may be placed for the purpose of securing the member 22 tothe jaw 17 and upon which the member 22 may pivot. The front portion of the member 22 is provided with a cap portion 26 within which the extension portion 21 of the jaws 17 may slide when the member 22 is pivoted about the rivet 25. Also on the inner side of the member 22 I have provided vertical stop-members 27.

It will be noted that the normal condition of the member 22 is curved, as shown inFig. 6, the material being composed of spring steel such that when the extension end 21 of the jaw members 17 are inserted under the cap 26 and the rivets 25 in place the lower surface of'the jaws 17 and the upper surface of the members 22 are held together by friction unless acted upon by considerable t ide force.

When it is desired to load the tool the members 22 are pushed toward each other and ahalf section of the locking member 14 is placed on the member 22, the curved side of the locking member being placed adjacent the recessed side 20 of the jaw 17 after which the members 22 are pivoted outward on the rivets 25, the result of which is to clamp the two half portions of the member 14 in the jaws 17. The members 14 may now be placed around the valve stem as shown in Fig. 1 and the saddle allowed to drop into place, the chamber 16 catching the member 14 and holding it against the valve stem just prior to displacing the jaws 17. v w

Fig. 7 illustrates a modified form of the spring member 22 as indicated by 22a. The only difference in the member 22 and 22a is that the member 22 is provided with a top cover portion on the cap portion 26 while member 22a has no such cover portion," and the spring curvatureof the member 22a is reversed from the member 22. When the member 22a is used in place of the member 22 it is unnecessary to reduce the end 21 of the member 17 as shown in Fig. 4 but such extension member may continue outward to the same limit as shown in. Fig. 4 but maintained at the same thickness as the rest of the jaw member 17. In operation either 22 or 22a will produce the same result both being held in contact against the sides of the jaws 17 by means of friction. I

Having thus described I claim as new, is: j

1. A tool for holding in place valve stem spring locking members comprising a pair of fiat bladed pliers, the inner front surfaces adapted to receive split cone lock members, spring members adapted to engage the botmy invention what tom portions of said lock members, friction means adaptedto the jaws of said pliers and sald lock members, substantially as shown and described. 1

2. A tool comprising a pair of pliers adapted to holdsplit cone valve spring locking members comprising a pair of recessed jaw members adapted to receive a portion of the sides of said split cones, spring members pivoted' to the bottom of said jaw members adapted to hold a portion of the bottom of said split cones, means for clamping said split cones in said recessed jaw members comprising flanges located on the inner sides of said spring members, means for maintaining friction between said spring members and said jaw members, said friction means comprising'cap portions located on-the end of said spring members adapted to engage over the ends of said jaws. j

3. In a valve spring locking tool, a 'pair of pliers having recessed conical inner surfaces. adapted to receive the conical sides of a split' cone valve spring locking member, pivoted spring members loc'ated'below said recessed WRAY FALWELL.