US2578410A

US2578410A - Open-ended ratchet wrench

Info

Publication number: US2578410A
Application number: US124362A
Authority: US
Inventors: Willis J Filiatreault
Original assignee: AARON T PERBOHNER
Current assignee: AARON T PERBOHNER
Priority date: 1949-10-29
Filing date: 1949-10-29
Publication date: 1951-12-11
Anticipated expiration: 1968-12-11

Description

Patented Dec. 11, 1951 .5

OPEN-ENDED RATCHET WRENCH Willis J. Filiatreault, Chicago, Ill., assignor of one-half to Aaron T. Perbohner, Chicago, Ill.

Application October 29, 1949, Serial No 124,362

2 Claims. (Cl. 81 61) The present invention relates to improvements in ratchet wrenches, and more particularly to a novelly constructed, rugged, open-ended ratchet wrench.

Known types of ratchet wrenches, and particularly open-ended ratchet wrenches, unless made excessively bulky, are likely to become distorted or to collapse when repeatedly subjected to excessive strain. Obviously, a wrench that is bulk is limited in its use because many fittings requiring the application of an open-ended ratchet wrench are located in restricted positions on vari ous types of machinery.

It is, therefore, an object of the present invention to provide an open-ended ratchet wrench with means to prevent collapse or distortion of the head under normal conditions of use and one which is exceedingly light in weight, rugged, compact and very efficient.

Another object of the present invention is to provide anopen-ended ratchet wrench with no- I velly constructed pairs of pawls adapted to increase the useful life of said wrench.

Another object of the invention is to provide a ratchet wrench having a socket member located at each end thereof with common means slidable to disengage either one or the other of the socket members from its actuating pawls.

Other objects of the invention will appear from the following description and accompanying drawing and will be pointed out in the annexed claims.

In the accompanying drawing there has been disclosed a structure designed to carry out the various objects of the invention, but it is to be understood that the invention is not confined to the exact features shown as various changes may be made'within the scope of the claims which follow.

In the drawing:

Fig. 1 is an elevational view of an open-ended ratchet wrench embodying the features of the present invention.

Fig. 2 is a side elevational view thereof partially broken away at one end.

Fig. 3 is a planular sectional view taken substantia ly on line 3-3 of Fig. 2.

Referring to the accompanying drawing, in detail, the openended ratchet wrench illustrated consists of an elongated hollow body having a head portion II at each end and an intermediate handle portion l2 connecting said head portions. The body preferably is made up of a pair of like halves I3, each fabricated of sheet steel. Each body half consists of a flat wall portion I4 and a surrounding marginal flange I5.

The parts of the ratchet wrench mechanism provided in each head portion II of the body are substantially identical. Consequently, the following description will concern itself with the mechanism contained within one head portion only, it being understood that the description is equally applicable to the mechanism contained in the other head portion, the parts of which are identified by the same numerals.

The free end of the head portion I I is cut away to provide a slot 56. This slot extends inwardly from said end and terminates in circular openings I! provided in each of the body walls I4. The openings I1 constitute bearing surfaces for a circular socket member generally indicated at I8. Upon referring to Fig. 2, it will be observed that the socket member I8 has a peripheral ratchet I9 which is of a width corresponding substantially to the thickness of the body. As a consequence, the socket member I8 is rotatably retained in place.

The socket member is provided with a radial slot M of a width corresponding substantially to the width of the body slot Hi. When the two slots are in registering alignment, the socket member may be fitted over a pipe or the like and may be subsequently moved therealong to engage the socket member over a fitting thereon. When so positioned, the wrench is adapted to be actuated in the conventional manner'so as to rotate the socket member and the fitting engaged thereby step-by-step. Such step-by-step rotation of the socket member I8 is accomplished by providing a pair of coacting pawls '22 and 23 in association therewith.

The

pawls

22 and 23 are each provided with a matching bearing lug 24 suitably apertured to receive therethrough a sleeve 25 and rivet 26 which constitute a bearing therefor. The sleeve 25 serves as a spacer and the rivet 26 extends to the outside of each of the body halves I3 and has its projecting ends riveted thereover, as at 21, to secure the body halves in their assembled relation. Each of the pawls has leg portion 28 extending into the handle portion I2 of the body. The leg portions 28 are suitably arched inwardly toward each other, as at 29, for a purpose to be explained presently. A compression spring 3|, arranged between the leg portions 28, normally tends to urge said leg portions outwardly away from each other so as to hold the free end portions of the pawls in engagement with the peripheral ratchet l9. As best shown in Fig. 3, the pawl 22 has a pair of teeth 32, both of which jointly coact with the peripheral ratchet l9. The pawl '23 has a single tooth 33 which also coacts with the peripheral ratchet l9.

In operation, reciprocal rotation of the'wrench body in one direction will cause both

pawls

22 and 23 to be effective to rotate the socket member [8. When the body is reciprocally rotated in the other direction, both pawls'slip over'the teeth of the peripheral ratchet 19 for subsequent re-engagement therewith. The provision of two pawls in the present structure is necessary to avoid rendering the wrench inoperative when the radial slot 21 thereof is in registration with the teeth on either of said pawls. In such instances, the tooth or teeth of the other pawl are efiective to' carry the socket member into such position that'the companion pawl may again become effective. It should be noted also that the :pawl carrying the two teeth acts to pull thesocket member. Were only a single tooth provided, the pawl would disengage itself from the ratchet almost at once when such pull is exerted.

After the object engaged by thesocket member 18 has been tightened or loosened, asthe case may be, it is necessary to realign the radial slot 2| in the socket member'with the slot is in the head portion. Such reealignment is required in order to permit the wrench to be removed from the pipe over which it had initially been positioned. To this end,means is provided for rendering the

pawls

22 and 23 ineffective so that the socket member may-be rotated freely within the head portion. Accordingly, the handle portion l2 of the body contains a cam plateSA. This cam plate has a stem 35 which extends through a longitudinal slot 35 in one of the housing halves 13. The projecting end of the stem 35 carries a finger piece 3l which may be engaged for shifting .the cam plate 34 toward either head H. In

the position illustrated in Fig. 3, the cam plate is inefiective. However, upon shifting said: cam plate upwardly, as viewed in Fig. 3, the opposed flanges 38 formed on the edge of a V-shaped recess 39 coactwith the curved ends 29 of the pawls to draw them together against the action 511 of'spring 3i. When'the pawl ends 29 are-drawn together in the 'manner described, the teeth- 32 and 33 thereof are carried out of engagement with the peripheral ratchet i9 and the socket member is free to rotate.

'Although a preferred embodiment of the pres ent invention has been disclosed in the accompanying-drawing and-described hereinabove, it

is to be understood that the invention may embody various modifications in detail structure without departing from the spirit of the invention or the scope of the appended claims.

I claim:

1. In an open-ended ratchet type socket wrench including a hollow radially slotted head portion and a hollow handle on said head, a socket member journalled in the head, a peripheral ratchet on said socket member, said socket member having a radial slot extending between "the socket therein and its periphery, said radial socket slot being adapted to be aligned with the radial slot in the head, a pair of pawls journalled on a common bearing in said handle having teeth normally engaged with the ratchet,

rotatably mounted in the head portion, said socket member having asocket opening and a radial slot extending from its periphery to said socket opening, said radial slot being adapted for-alignment with the respective head slot, a peripheral ratchet on said socket member, a pair of pawls in the body to co-act with the ratchet, and a cam member slidable in the handle for engagement with the pawls to disengage both pawls'from the ratchet.

WILLIS J. FILIATREAULT.

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

UNITED STATES PATENTS Number Name Date 38,914 Richardson June 16, 1863 581,427 Olson Apr. 27, 1897 753,703 Harris Mar. 1, 1904 923,942 Brockway June 8, 1909 1,305,249 Buck June 3, 1919 1,389,200 Linde Aug. 30, 1921 1,868,840 McNaught et a1. July 26, 1932 2,353,901 Jires July 18, 1944 2,500,835 Lang Mar. 14, 1950 FOREIGN PATENTS Number Country Date 391,210 France Oct. 1908