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US Patent: 35,950
Improved Pipe-Wrench for Screwing and Unscrewing Metal Pipes
Henry F. Read - Brooklyn, NY

USPTO Classifications:

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench components : wrench jaw components


H. F. Read - Brooklyn, NY

S. J. Burr
Charles Burr

Patent Dates:
Granted: Jul. 22, 1862

Patent Pictures: [ 1 | 2 ]
Henry F. Read Pat. July 22, 1862
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The hollow handle holds a spring which acts through an internal chain and link to a toothed eccentric jaw. The spring acts to close the jaw. The jaw has a finger loop to pull it open. The proportions of the wrench are such that the smallest size would fit one-quarter through one inch pipe, the next size one inch through two inches and a half, and so on.

Corresponding British patent GB-186401747 was registered July 13, 1864.

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