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US Patent: 1,553,623
Parallel Valve Spring Lifter
John H. McLeod - Stockton, CA

USPTO Classifications:
29/221, 81/302, 81/336, 81/349

Tool Categories:
specialty tools : valve spring tools

John H. McLeod - Stockton, CA
Fred P. Clark - Stockton, CA

Not known to have been produced

none listed

Patent Dates:
Applied: Aug. 20, 1924
Granted: Sep. 15, 1925

Patent Pictures:
John H. McLeod patent Sept. 15, 1925
USPTO pdf tiff
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The linkage between the handles and jaws keeps the jaw faces parallel. The spring-tensioned catch which maintains the setting to hold the spring in compression is not part of the patent's claims.

This patent is noted in patent no. 1,879,330.

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