Construction for an adjustable wrench
AssigneeEmerson Electric Co.
InventorJohn A. Hermann
Life of this patent
Estimating the term…
Abstract
An improved design for an adjustable wrench and a method for making the same are disclosed. One embodiment of the disclosed wrench includes a main body which includes a handle, upper jaw, and an attachment portion such as a groove. The lower jaw of the wrench, which contains two ribs with threaded surfaces, is slipped over the attachment portion. The threaded surfaces of the ribs are made to meet with the threads on a thumbwheel, thus allowing the distance between the upper and lower jaws to be varied by turning the thumbwheel. Because the lower jaw slips over the attachment portion of the main body, the disclosed wrench can be manufactured with reduced expense. Moreover, this configuration provides for increased stability because the ribs of the lower jaw contact the thumbwheel at two points.
Claims9
An adjustable wrench, comprising:
- a main body, the main body including a handle, a first jaw, and an attachment portion;
- a second jaw, wherein the second jaw slides over the attachment portion of the main body, and wherein the second jaw contains two parallel threads facing the same direction;
- and
- a threaded thumbwheel mounted to the main body, wherein the two threads and the threaded thumbwheel are in contact such that rotation of the thumbwheel causes the second jaw to move with respect to the first jaw.
Dependencies are inferred from the claim text.