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US Patent: 2,027,534
Stud Bolt Wrench
Patentee:
Charles B. Ingersoll - Cleveland, OH

USPTO Classifications:
81/128, 81/53.2

Tool Categories:
wrenches : socket wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Aug. 05, 1933
Granted: Jan. 14, 1936

Patent Pictures:
Charles B. Ingersoll patent January 14, 1936
USPTO pdf tiff
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Description:
The outer shell has a hexagonal bore; the inner core with slots for the gripping rollers is held in the shell by a split ring. Parts of the hexagonal bore and rollers have fine teeth to provide firm grip.

F. E. Shannon - patent attorney

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