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US Patent: D164,505
Self-Adjusting Wrench Or Similar Article
Patentee:
John V. Larson - Chicago, IL

USPTO Classifications:
D8/23

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
TRIG-O-MATIC TOOL CORP. - Chicago, IL

Witnesses:
none listed

Patent Dates:
Applied: Jul. 13, 1949
Granted: Sep. 11, 1951

Patent Pictures:
John V. Larson design patent September 11, 1951
USPTO pdf tiff
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Description:
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.

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