Patent ID: 11890742
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 17:
18. A pipe wrench, comprising:
a head comprising an aperture;
a bore at a first end of the head and extending along a longitudinal axis of the pipe wrench;
a lower jaw coupled to a second end of the head, the lower jaw comprising a plurality of teeth that define a lower contact region;
an upper jaw partially extending through the aperture of the head, the upper jaw comprising a threaded section and a plurality of teeth that define an upper contact region;
an actuator comprising threads engaged with the threaded section of the upper jaw such that rotation of the actuator moves the upper jaw relative to the lower jaw;
an extendable handle received within the bore of the head;
a lever; and
a friction block;
wherein the lever is rotatable about a pivot between a locked position in which the extendable handle is fixed with respect to the head and an unlocked position in which the extendable handle is adjustable with respect to the head;
wherein, when the lever is in the locked position, the lever extends along the longitudinal axis of the pipe wrench and wherein, when the lever is in the unlocked position, the lever extends in a perpendicular orientation to the longitudinal axis of the pipe wrench;
wherein the head further comprises a rear surface, and the rear surface includes a recess shaped to receive the lever when the lever is in the locked position and wherein the friction block is positioned between the lever and the extendable handle;
wherein the lever applies a normal force on the friction block and the friction block distributes the normal force to the extendable handle such that the extendable handle is secured at a desired length.