The Antique Wrench Patent Archive

Every grip the nineteenth century took on a nut

19th century plumbing tool

Two patent drawings of a hand-held pipe wrench showing a hooked jaw head with an eccentric serrated cam and claw, a square adjustable shank secured by a set-screw, and a turned wooden-style handle at the base.IMPROVEMENT IN PIPE-WRENCHESIra S. Hamilton · November 7, 1871Patent drawing showing a pipe wrench lever with a toothed end, several interchangeable curved toothed hooks, a spring ratchet-catch mechanism, and two views of the lever and hook assembled in open and closed positions.IMPROVEMENT IN PIPE-WRENCHES.Eliezer Rees Mathews · April 17, 1877Patent drawing of a combined pipe-wrench and pipe-cutter tool showing a curved hooked head with a rotary cutter and pivoting dog, a threaded shaft body, and a long handle ending in an oval knob, with a separate enlarged detail of the adjustable chamfering screw and swivel joint.IMPROVEMENT IN PIPE-WRENCHES WITH CUTTERS.John Brewer · August 20, 1878Patent drawing showing two interchangeable attachments for a handle: Fig. 1 depicts a curved cutting blade with a hooked jaw and adjusting thumb-screw, and Fig. 2 depicts a serrated wrench jaw with a similar curved handle and slot for the pivot bolt.IMPROVEMENT IN PIPE-WRENCHES WITH CUTTERS.William L. Truland · September 24, 1878