US Patent: 1,608,176 - Valve Lifting Tool


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US Patent: 1,608,176

Valve Lifting Tool

Patentees:

Willis F. Hobbs (exact or similar names) - Bridgeport, Fairfield County, CT

John A. Anderson (exact or similar names) - Bridgeport, Fairfield County, CT

USPTO Classifications:

29/221

Tool Categories:

specialty tools : valve spring tools

Assignees:

Bridgeport Hardware Mfg. Co. - Bridgeport, Fairfield County, CT

Manufacturer:

Bridgeport Hardware Mfg. Co. - Bridgeport, CT

Witnesses:

none listed

Patent Dates:
Applied:	May 11, 1925
Granted:	Nov. 23, 1926

Patent Pictures: [ 1 | 2 ]

Willis F. Hobbs and John A. Anderson patent Nov. 23, 1926

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Description:

Major components of the patent are the catch to hold the jaws in adjustment, and the stamped metal parts with the jaw and handle parts being identical for both sides.

Produced as early version of the Bridgeport "BULL PUP" valve lifter, and subsequently the subject of patent infringement litigation (KULP v. BRIDGEPORT HARDWARE MFG. CORPORATION).

Improved by patent no. 1,614,300