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US Patent: D287,928
Pivoted Jaw Wrench
Patentee:
Kiyoshi Watanabe - Sanjo, Japan

USPTO Classifications:
D8/22, D8/23

Tool Categories:
wrenches : wrench adjustment types : self-adjust wrenches

Assignees:
Top Kogyo Co., Ltd. - Niigata, Japan

Manufacturer:
Unknown

Witnesses:
non listed

Patent Dates:
Applied: Apr. 12, 1984
Granted: Jan. 27, 1987

Patent Pictures: [ 1 | 2 ]
Kiyoshi Watanabe design patent January 27, 1987
USPTO pdf tiff
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Description:
Self-adjusting pipe and nut wrench, based on the "MASTERENCH". The hook jaw has a "bump" to facilitate opening with the thumb.

The specifications cite U.S. patent nos. D184,451, 65,465, 1,885,616, 2,028,406, 2,057,899, 2,559,973, 2,645,145, and a couple of foreign patents as references.

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