https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=17518&pn=286,913 Wrench Patentee: Robert W. Davis - Elmira NY Granted:1883-10-16
Manufactured by Davis Wrench Co. - Elmira NY
Assigned to Davis Wrench Co. - Elmira NY

The adjustable jaw has a pivoting gripping block. It is held in engagement by a set screw on the back side of the movable jaw. Wrench miniaturist Hilary Klein produced miniature versions of this wrench, based on an example in his collection.
This is one of 84,733 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=24565&pn=282,256 Combined Pipe Tongs and Wrench Patentee: Elbridge F. Barnes - New Haven CT Granted:1883-07-31
Manufactured by Barnes Tool Co. - New Haven CT

It resembles Barnes' January 9, 1877 patent (no. 186,099) in many respects. The main body is to be cast in one piece; the reversible jaw has a flat wrench surface on one end and pipe teeth on the other. Known examples are unmarked or have the January 9, 1877 patent marking (see that patent for more info.) Late 19th Century hardware catalog listings and a 1905 ad for the BARNES tongs shows both patent dates.
This is one of 84,733 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=17799&pn=735,289 Pipe Wrench Patentee: Karl Peterson - Jamestown NY Granted:1903-08-04
Manufactured by William Hjorth & Co. - Jamestown NY
Assigned to William Hjorth & Co. - Jamestown NY

Used in conjunction with pat. no. 573,999 for the EMPIRE pipe wrench produced by Wm. Hjorth &. Co. of Jamestown, NY. A 1904 "Iron Age" listing shows the wrench in 10", 14", and 18" sizes. Peterson went on to found Crescent Tool.
This is one of 84,733 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=42635&pn=D164,505 Self-Adjusting Wrench Or Similar Article Patentee: John V. Larson - Chicago IL Granted:1951-09-11
Manufactured by TRIG-O-MATIC TOOL CORP. - Chicago IL

Self-adjusting hook jaw wrench with a covered coil spring that closes the jaw. Patent no. 1,900,358 is cited as a reference. Larson's utility patent no. 2,645,145 covers the functional aspects. Produced and marketed as "TRIG-O-MATIC." Cited as a reference in D186,132.
This is one of 84,733 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=27925&pn=2,645,145 Adjustable Self-Closing Pipe Wrench and the Like Patentee: John V. Larson - Chicago IL Granted:1953-07-14
Manufactured by TRIG-O-MATIC TOOL CORP. - Chicago IL

The patent is to simplify the construction and improve the performance of pipe wrenches of the type represented by patent nos. 1,602,620, 1,830,033, 2,351,821, and 2,623,428. The major features are the flat spiral tension spring and the thumb *trigger* at the lower end of the movable jaw. Design patent D164,505 shows the outward physical appearance. Produced as the TRIG-O-MATIC.
This is one of 84,733 patents currently in the database at datamp.org

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