US 4,901,608 AGranted

Adjustable angle ratchet wrench

OwnerJames Shiehinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

The invention relates to an adjustable angle ratchet wrench. A ratchet wrench head is provided with a toothed protrusion. The handle has a forked end to receive the protrusion and the head and handle are hinged about a bolt therethrough. Between the tines of the fork is also disposed a gear having two different size diameters. This gear is provided on the shaft of a button which is spring loaded. In the normal position the large gear engages with the teeth of the protrusion on the head and the smaller gear engages with an inwardly toothed section of one tine of the fork such that the wrench head and handle are held rigid. When the button is depressed, the smaller gear disengages from the handle and the wrench head and handle are free to rotate through an angle of approximately 180 degrees with respect to each other. When the button is released, the spring loaded returns the gear to the normal position and the handle is fixed again.

An adjustable angle ratchet wrench comprising:

(a) a wrench head including a rectangular protrusion extending outwardly from a side thereof disposed perpendicular to a drive shaft, the protrusion being provided with a semi-cylindrical first gear at one end thereof and a central cylindrical passageway;
(b) a handle including a fork defined by a pair of tines forming a Y-shaped opening sized for receiving the protrusion therein, each tine being substantially rectangular in shape and terminating in an end having a semi-cylindrical shape;
(c) a first cylindrical bore extending through the tines and including a threaded section in one tine and a stepped section in the other tine, and a bolt extending through the cylindrical bore and the central cylindrical passageway of the protrusion, the bolt being disposed in threaded engagement with the threaded section;
(d) a second cylindrical bore extending through the tines and including an outer section and toothed section in one tine, and a larger diameter inner cylindrical opening and a smaller diameter outer cylindrical opening in the other tine;
(e) a second gear provided with teeth on its outer surface and including a set of larger first teeth engageable with the first gear and a set of smaller second teeth engageable with the toothed section, the second gear further including a central rectangular bore and a cylindrical passage;
(f) a button including a cylindrical head portion, a reduced diameter cylindrical section, a rectangular section and a cylindrical shaft, the rectangular section being disposed within the central rectangular bore of the second gear and the cylindrical shaft being received through the cylindrical passage of the second gear, and a spring surrounding the cylindrical shaft and seated within the inner cylindrical opening of the tine, and means for securing the button to the tines;
(g) the wrench head being hinged to the handle for pivotal movement about the bolt during engagement of the first gear and the first teeth of the second gear, the second teeth of the second gear being urged by the spring into engagement with the toothed section of the tine so that the second gear may be disposed in rigid engagement with the handle and secure the wrench head in a rigid fixed position with respect to the handle;
and
(h) whereby when the button is depressed against the spring, the smaller second teeth of the second gear is released from engagement with the toothed section of the tine, thereby permitting the wrench head to freely pivot with respect to the handle through an angle of approximately 180.degree. C. about the bolt.

6 more elements

Abstract

Claims2