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US Patent: 2,580,247
Cam actuated wrench
Patentees:
Raymond Gaston Secondi (exact or similar names) - Paris, France
Jean Vacheron (exact or similar names) - Maison-Alfort, France

USPTO Classifications:
81/128, 81/53.2

Tool Categories:
specialty tools : stud extractors

Assignees:
Raymond Gaston Secondi - Paris, France
Jean Vacheron - Maison-Alfort, France
Charles Henry Harrison - Paris, France
Robert André Boizard - Paris, France

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: May 19, 1950
Granted: Dec. 25, 1951

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Description:
This stud extractor was especially intended for removing boiler staybolts.

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