US Patent: 2,791,304 - Safe Torque Driver


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US Patent: 2,791,304

Safe Torque Driver

Patentees:

Bernard R. Better (exact or similar names) - Chicago, Cook County, IL

John W. Lehde, Jr. (exact or similar names) - Chicago, Cook County, IL

USPTO Classifications:

192/56.5

Tool Categories:

metalworking machines : drilling and boring : drilling and boring tool holders

metalworking tools : tap and die holders

Assignees:

Scully-Jones & Co. - Chicago, Cook County, IL

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Feb. 05, 1954
Granted:	May 07, 1957

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Scully-Jones & Co.

Description:

Claim:

A torque driver for driving taps or other tools having a unitary resilient driving cylinder, a cylindrical driven member in the cylinder having a longitudinal driving face and a roller releasing area spaced from the said driving face, rollers positioned between the driving cylinder and the driven member adapted to drive the driven member when engaging with the driving faces and to release the driven member under predetermined torque and become free when in the releasing areas, a cage for the rollers mounted between the driving cylinder and the driven member, and ball and groove means for holding the cage in predetermined circumferential positions with respect to the driven member.