US2478881A

US2478881A - Tool for removing locking keys from brake anchor bolts

Info

Publication number: US2478881A
Application number: US740032A
Authority: US
Inventors: Carl B Wayrynen
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-04-08
Filing date: 1947-04-08
Publication date: 1949-08-09
Anticipated expiration: 1966-08-09

Description

Aug. 9, 1949. f c. B. WAYRYNEN TOOL FOR REMOVING LOCKING KEYS FROM BRAKE ANCHOR BOLTS Filed April 8, 1947 IN VEN TOR. CA RL 5. Mmy/vz/v ATTORNEY. f

Patented Aug. 9, 1949 ii odt FR nests-sat stint, f ""lfil'sim; (01.2mm

This invention relates to atool for removing locking keys nan ke i'inchor bolts of auto- Imotive vehicles makes of automobiles, trucks, and bosses the brake shoes are mounted on eccentric anchor bolts which can be rotated to adjust tl'iebaiid clearance. The shoes are held in place on the bolts by means of flat, U-shaped keys which are Lforced into circumferential grooves in the bolts It "is exceedingly i v t liesekeys, sincetheyare; it v'ely thin aird 'm c'l se to the Hi a-lie "asse"bly that they cannot be reached or gripped by conventional tools. They often become bent and distorted so that it is impossible to remove them with ordinary tools without completely demolishing the key.

The principal object of this invention is to provide an improved tool for removing and replacing these keys which will be economical to manufacture, simple in operation, and which will instantly remove any key, regardless of its condition, without damage to either the key or the bolt.

Qther objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and efficiency. These will become more apparent from the following description.

In the following detailed description of the invention, reference is had to the accompanying drawing which forms a part hereof. Like numerals refer to like parts in all views of the drawing and throughout the description.

In the drawing:

Fig. 1 is an end view of a conventional brake anchor bolt, with its locking key in place thereon;

Fig. 2 is a. side view of the head portion of the bolt and locking key of Fig. 1;

Fig. 3 is a side elevational view of the improved tool illustrating, in broken line, its operating position relative to the bolt and key of Fig. 2;

Fig. 4 is a top plan view of the improved tool; and

Fig. 5 is an end view of the tool in place on an anchor bolt, the bolt being shown in crosssection as though out on the line 55, Fig. 3.

While the invention will be found useful on any bolt having a thin, U-shaped locking key, it is more particularly designed for use on automotive brake anchor bolts. Such -a bolt is illustrated at II] on the drawing, with its U-shaped, sheet metal, locking key at II. The key slips astride a circumferential receiving groove I2 formed about the head of the bolt I I) and having wayrynen, Denver, Colo. v

II. The opening between the two ofthe ees; I'I is eghty tests; or" he dittii'iigter of 'tlfe grodvevasaaasatieiwrfeh r? nits-tire gr c 'e meieg iibrtiegis tin -5t P69 admit the b'c'iltiarid-sriazp aetiittii iatgei tb aegis the in" iece; riie I I relatively horizontally at its middle portion, and wareiyat-its tgittanl t'tranh naifrbwsatfitreisfih on his sto ies iifirtioffs. "rt rena/a the has been heretofore necessary to pry or poun it mom'piate.

The improved tool comprises two handle members, which will herein be designated for convenience an upper handle member I3 and a lower handle member I4.

The two handle members I3 and I4 are preferably rounded adjacent their extremities to provide a comfortable hand grip, and are vertically flattened adjacent their forward extremities to lie flat against each other about a hinge bolt I5 in plier-like arrangement.

The lower handle member I 4 terminates in a transversely widened, downwardly curved, hooked upper jaw I B in the bottom edge of which an upwardly curved arcuate notch I1 is formed. The radius of the notch I'l corresponds to the radius of the head of the .bolt III.

The upper handle member I4 terminates in a relatively wide, flat, horizontal lower jaw I8 which projects forwardly of the hooked upper jaw a distance substantially equal to the thickness of the key I I. A rearwardly extending notch I9 is formed in the forward extremity of the lower jaw I8. The width of the notch I9 is less than the width of the key I I but greater than the width of the head of the bolt Ill. The width of the upper jaw I6 is slightly less than the width of the notch I9 so that the former may pass downwardly into the latter.

Let us assume that the key II is in place on the bolt I0 and that it is desired to remove it with the improved tool. The jaws I6 and I8 are separated and the upper jaw I6 is rested upon the head of the bolt III, with the notch I'I receiving the head, in close proximity to the key II.

The handles I3 and I4 are now squeezed together. This brings the lower jaw I8 upwardly until the two sides of the notch I9 engage the two bulging sides of the key I I, as shown in Fig. 5. Further pressure on the handles forces the lower jaw and the key I I upwardly and the upper jaw and the bolt I0 downwardly, resulting in snap ping the key from its groove I2. The edges of the notch I9 bite into the sides of the key I I with a width corresponding to the thickness of the key such force that the key wedges therein and remains self-supporting in the notch after it has been removed from the bolt I0. Sufiicient force can be exerted on the key to force it from the slot, regardless of its condition. If the extremities of the legs of the key are bent, they will straighten out as they are forced upwardly through the groove l2.

To replace the key with the tool, it is only necessary to reverse the toolsro that the side edges of the slot I9 will engage the top of the key to force the leg portions thereof downwardly on each side of the bolt head.

In the description and claim of this invention, the handles and laws have been referred to as upper and lower, and the movements have been referred to as upward and downward. It is to be understood that these are simply terms of convenience, with reference to the particular showing on the drawing. The tool will operate efiiciently in any desired position and in any desired direction.

While a specific form of the improvement has been described and illustrated herein, it is desired to be understood that the same may be varied, within the scope of the appended claim,

without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired secured by Letters Patent i A tool for removing locking keys from brake anchor bolts comprising: a relatively wide, flat lower jaw; an upper handle member secured to and extending upwardly and rearwardly from the middle of the rear upper surface of said lower jaw; a medially located notch extending rearward from the forward edge of said lower jaw a hooked upper jaw; a relatively wide lower edge on said upper jaw positioned over and extending transversally of said notch and having less width than the latter; a lower handle member extending rearwardly and downwardly from said hooked upper jaw across said upper handle member; pivot means securing said handle members together at their intersection; and an upwardly curved arcuate notch formed in the said relatively wide lower edge of said hooked upper jaw, the axis of said arcuate notch lying in the vertical medial plane of the notch in said lower Jaw.

CARL B. WAYRYNEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS