US968858A - Adjustable ratchet-wrench. - Google Patents

Description

0. KORNBERG. ADJUSTABLE BATGHET WRENCH. APPLIOATION FILED DBo.e.19o9.

1HE NcRms PETERS co., wAsHmcoN. D4 c.

O-LE KORNBERG', 0F SUPERIOR, WISCONSIN.

ADJUSTABLE RATCHET-WRENCH.

Speccaton of Letters Patent.

Patented Aug. 3(7), 1910.

Application filed December 6, 1909. Serial No. 531,662.

To all whom it may concern.'

Be it known that I, OLE. KORNBERG, a subject of the King of Norway, residing at Superior, .in the county of Douglas and State of Visconsin, have invented certain new and useful Improvements in Adjustable Ratchet-Wrenchesg and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved adjustable ratchet wrench, and to this end, it consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a view principally ,in section, taken on the line w1 al of Fig. 2; Fig. 2 is a view in front elevation, with some parts removed and with other parts broken away; and Fig. 3 is a view principally in section on the line m3 fc3 of Fig. 1, with some parts shown in full and with other parts broken away.

rlhe numeral 1 indicates a socket, the interior walls of which are tapered to receive a pair of sliding jaws 2. The jaws 2 are held against rotation with respect to the socket 1, by means of a pair of diametrically opposite V-shaped ribs 3 integrally formed on the tapered walls of the socket 1 and each jaw 2 is provided on its tapered surface with a V-shaped groove 4 adapted to fit over and slide upon one of the ribs 3. The outwardly projecting ends of each jaw 2 are formed with cooperating half seats together forming a socket or seat 5 for engagement with the nuts. Leaf springs 6 are interposed between the two jaws 2 and yieldingly force the same apart and into close engagement with the tapered wallsof the socket 1. For the purpose of positively moving the jaws 2 back and forth within the socket 1, in order to vary the size of the nut seatI 5, a screw 7 and a cap nut 8 are provided. The screw 7 terminates at one end in a bifurcated head 9 and said head has a removable lock key 10 mounted in the two prongs thereof. The inner ends of the jaws 2 are reduced in width so as to project between the two prongs of the bifurcated head 9 and the reduced ends of the jaws 2 are fulcrumed and detachably secured'to the key 10 by means of a pair of reversely projecting hooks 11 formed at the reduced ends of the jaws 2, by cutting away the inner surface thereof. The outer end of the cap nut 8 has screw threaded engagement with the screw 7 and its inner or open end surrounds the head 9 and bears against the socket 1. As is evident, the screw 7 is held against rotation with respect to the socket 1, by means of the ribs 3 and grooves 4. By rotating the cap nut 8 with respect to the screw 7, the jaws 2 may be moved back and forth within the socket 1, to vary the size of the nut seat 5, for the purpose of taking hold of nuts of different sizes. After a nut has been engaged by the seat 5, the same may be turned by rotating the socket.

For the purpose of rotating the socket 1, a portion thereof is reduced in diameter to afford astop shoulder 12, and an annular head 13, having a long lever 14, is rota-Hm tively mounted on the reduced portion of the socket 1 and held against lateral movement with respect thereto by means of the stop shoulder 12 and a stop collar 15. The

stop collar is secured to the projecting re.

duced end portion of the socket, by screw threaded engagement, and is held against rotation, by means of a lock pin 16 which projects through the stop collar 5 and into the socket 1. The head 13 may be locked to the socket 1 rigidly, or may be rotated either to the right or the left, by means of a pair of reversely acting dogs 17 that are pivotally secured at 18 within a seat 19 formed in the head 13. A U-shaped spring 20 is mounted in the seat 19 and yieldingly presses the free ends of the dogs 17 toward each other for engagement with a series of square ratchet teeth 21 formed on that portion of the periphery of the socket 1 which underlies the head 13. A dog shifting cam 22 is pivotally mounted in the seat 19 between the dogs 17 and is provided with a laterally projecting operating stem 23 which works within a slot 24 formed in the head 13. As is evident, by operating the stem 23, the cam 22 may be shifted into engagement with either of the dogs 17 or into an intermediate position so that both of the dogs 17 will engage the ratchet teeth 21. The jaws 2 and screw 7 are locked together by means of the lock key 10 and the lock key, in turn, is held against removal by the cap nut 8 and the socket 1.

The above described device, while of simple construction and cheap to construct, is thought to be eiiicient for the purposes had in View.

llhat I claim is:

l. In a ratchet wrench, the combination with a socket and means for rotating the same, of a screw having at one end a head, al cap nut reacting between the screw and thesocket and surrounding said head, a lock keydetachably mounted in said head but held against removal therefrom by said cap nut, and a pair of jaws slidably mounted in said head for opening and closing movement-s and having cooperating half seats in their outer ends and terminating at their inner ends in hooks fulcrumed on said lock key and said jaws being held against endwise movements with respect to said screw, substantially as described.

2. In a ratchet wrench, the combination with a socket having its inner walls tapered, an operating handle rotatively mounted on said socket and a pawl and ratchet connection between said socket and said handle, of a screw having at one end a bifurcated head, a cap nut reacting between the screw and socket and surrounding said head, a lock key detachably mounted in the prongs of said head and held against removal therefrom by the cap nut, and a pair of jaws slidably mounted in said socket but held to rotate therewith and having cooperating half seats formed in their outer ends and their inner ends terminating in hooks ulcrumed on the lock key and said jaws being held against endwise movements with respect to said screw, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

OLE KORNBERG. IVit-nesses JOHN A. I-IoBE,

GUTTORM KoRNs'rAD.

Images