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US Patent: 414,663
Wrench
TRIMO pipe wrench
Patentee:
John H. Vinton - Boston, MA

USPTO Classifications:
81/101

Tool Categories:
wrenches : pipe wrenches

Assignees:
Trimont Manufacturing Co. - Portland, ME

Manufacturer:
Trimont Mfg. Co. - Roxbury, MA
Trimont Mfg. Co. - Portland, ME

Witnesses:
Geo. W. Gregory
Blanche Dewar

Patent Dates:
Applied: Dec. 18, 1888
Granted: Nov. 05, 1889

Patent Pictures: [ 1 | 2 ]
John H. Vinton patent Nov. 5, 1889
USPTO pdf tiff
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Description:
Introduces a compression spring in the frame "beneath" the tail end of the movable jaw. Together with Vinton's Feb. 12, 1889 patent 397,618 and his June 18, 1889 design patent D19,168 this is the first TRIMO pipe wrench.

Corresponding British patent GB-188902419 was registered February 12, 1889.

No. 429,088 was the next stage in the evolution of TRIMO pipe wrenches.

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