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US Patent: 1,361,219
Valve Spring Holder
John J. Bartenstein - Cleveland, OH

USPTO Classifications:
29/218, 433/157

Tool Categories:
specialty tools : valve spring tools

Fairmount Tool & Forging Co. - Cleveland, OH

Fairmount Tool & Forging Co. - Cleveland, OH

none listed

Patent Dates:
Applied: Jul. 01, 1918
Granted: Dec. 07, 1920

Patent Pictures: [ 1 | 2 | 3 ]
John J. Bartenstein patent Dec. 7, 1920
USPTO pdf tiff
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The structure provides controlled pressure to compress a valve spring between the jaws as shown in the patent drawings, or between one jaw and the engine block as shown in contemporary advertising.

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