US1451498A

US1451498A - Ratchet wrench

Info

Publication number: US1451498A
Application number: US491182A
Authority: US
Inventors: Gustav A Faitz
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-08-10
Filing date: 1921-08-10
Publication date: 1923-04-10
Anticipated expiration: 1940-04-10

Description

Apr. l0, 1923 G. A. FAlTz RATCHET WRENCH Filed Aug. lO, 1921 2Y sheets-sheet l v. @fm/f w 1: nw Uf Apr. 10, 1923 G., A, FAITZ RATCHET WRENCH A Fild Aug. l0, 1921 2 sheets-sheet 2 Patented pr. 10, 1923.

GUSTAV A. FAITZ, OF CHICAGO, ILLINOIS.

RATCH'ET WRENCH.

Application filed August 10, 1921. Serial No. 491,182.

To a/ZZ wimm- 't't may concern:

Be it known that. I, GUs'rAv A. FAITZ, a citizen ot the United States, and resident of Chicago, county of Cook and State of Illinois, have invented certain new and useful Improvements in Ratchet `Wrenches, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to wrenches and more particularly to those having a socket for application to the member to be rotated, and ratchet mechanism permitting a reverse movement of the' handle without corresponding movement of the socket. The object of the invention is to provide a ratchet wrench comprising only a small number of parts but capable of use without change for the application of power in either direction.

The invention is exemplified in the`struc ture to be hereinafter described and which is illustrated in the accompanying drawings, in which Fig. 1 is a plan view of the improved wrench showing only a part ott the handle;

Fig. 2 is similar to Fig. 1, but with one of the side plates of the head removed and one ot' the connecting bo-lts shown in section;

Fig. 3 is a detail view principally in central longitudnal section showing the parts of the wrench disassembled, a'nut to which the wrench socket may be applied and the connecting nuts and bolts being shown in elevation Fig. 4 is a plan view of the wrench with the parts in operative position for rotation of a nut in the direction indicated by the arrow, one of the side plates of the wrench head being partly broken away and one ot the connecting bolts being shown in section, and

Figs. 5, 6 and 7 are each similar to Fig. 2, but show modified forms of construction.

As is usual in the construction of ratchet wrenches, the improved wrench comprises a swinging handle 10, and a head generally designated 11, to which the handle 10 is pivotally attached as by a connecting bolt 16. For convenience of construction the walls of the head 10 will preferably-include a pair of side plates shown at 12 and 13, the two side plates being shown as being formed with inturned marginal flanges 26. 27 which serveto separatethe plates in all other parts of the same a suiiicient distance to receive the adjacent part of the handle 10 between them. The pivot bolt 16 accorda second bolt 17 provides both an additional connecting means and a stop for limiting the swinging movement of the handle 10, as in Fig. 4. To avoid interference with the movement of the handle by pressure of the side plates against the same, a spacingbushing 36 (Fig. 3) is preferably mounted on the pivot bolt 16 while the bolt 17 is desirably formed with a limiting shoulder 37.

The improved wrench is also construction in that it includes -a ratchet hub 20 which is centrally apertured to receive the squared stem of a bolt or nut socket 24. As usual, the ratchet hub 20 is located between the

side plates

12, 13, and its two rounded ends, as 21 project through and are journaled in the corresponding side plates,

thereby permitting the introduction of the stem 25 of the socket 24 from either side of the wrench.

In carrying out the invention, pawls, as 14 and 15, 30 and 31 or 34, are provided for actuating the ratchet hub 20 in either direction and these pawls are positioned by the movement of the handle 10. In Figs. 1 to 5 and in Fig. 7 the pawls 14, 15 or 34 are formed integral with the handle 10 while in Fig. 6 the pawls 30, 31 are Jformed together as a separate piece which is pivotally mounted on the connecting bolt 17 and the handle 10 is provided with

lugs

32, 33, at its inner end. These lugs embrace 'the said separate pawl member between them and engage the same upon movement of the handle in either direction for advancing the corresponding pawl.

Since, in every case, the positioning of the pawls is accomplished by the swinging of the handle 10, it follows that movement of the handle in the direction in which power is to be applied, as in Fig. 4, serves to advance the proper pawl, as 14, for turning the ratchet hub 20 in the desired direction. To avoid engaging the other pawl, as 15, during idle movement of the handle in the opposite direction it is only necessary to grasp the handle in such a way as to impart the said idle movement to the same without substantial turning movement of the handle on the pivot bolt 16. On the other hand, if the ingly serves to connect the side plates andv of ordinary v application of power in the said Opposite direction is desired this is readily accomwrench head upon the inside of the same and embrace the corresponding pawls 1between them. fFor the application lof power in either direction it is necessary to swing the handle upon the pivot bolt lGVagainst the resistance of the springs while the springs facilitate the making of an idle movement of the handle without turning the same upon the pivotpin 16 beyond the central position of vthe handle with respect to the wrench f head.

The construction illustrated in Fig. 7 is identical with vthat illustrated in Fig. 5 except that the pawls 84 are each formed with a series of teeth and the ratchet hub 2O is provided with correspondingly shaped f ratchet teeth.

I claim as my invention l. In a ratchet wrench, in combination, a head comprising a pair of parallel plates having inwardly projecting spacing flanges at their peripheries, a sleeve journaled between the plates, ratchet teeth formed on the sleeve, a handle pivoted between the plates, a pair of oppositely facing pawls fixed to the handle and projecting beyond the pivot of the handle to cooperate with the ratchet teeth, and springs mounted within the head reacting upon the handle for normally holding' the handle in central position.

2. In a reversible ratchet wrench, in combination, a head comprising a pair of par.- allel plates having inwardly projecting spacying flanges at their peripheries, a ratchet sleeve journaled in said plates.y ratchet teeth formed on the sleeve between the plates, said teeth having two oppositely directed sets of pawl engaging faces, a handle pivoted between the plates, a pair of pawls operated by said handle and each adapted to cooperate with one set of pawl engaging faces on said ratchet teeth for rotating said sleeve in agiven direction.

GUsTAv A. rarrz.