US Patent: 400,380 - Improvement in Pipe Wrenches


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US Patent: 400,380

Wrench
Improvement in Pipe Wrenches

Patentees:

William C. Worthen (exact or similar names) - Boston, MA

Gurdon Pendleton, Jr. (exact or similar names) - Boston, MA

USPTO Classifications:

81/183

Tool Categories:

wrenches : pipe wrenches

Assignees:

John D. Walworth - Boston, MA

William C. Worthen - Boston, MA

Gurdon Pendleton, Jr. - Boston, MA

Manufacturer:

Not known to have been produced

Witnesses:

O. M. Shaw

E. M. Spinney

Rob't W. Matthews

Patent Dates:
Applied:	Nov. 09, 1888
Granted:	Mar. 26, 1889

Patent Pictures:

William C. Worthen and Gurdon Pendleton, Jr. patent March 26, 1889

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Description:

Improvement on patent no. 397,954. The paired rollers are linked by a curved strap so the distance between them does not change. The rollers in tapered recesses form non-marring gripping surfaces for pipe. The movable jaw adjusts by a turnbuckle type screw adjustment.

Corresponding Canadian patent no. CA-31,613 was granted June 18, 1889.