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US Patent: 1,896,645
Coupling For Socket Wrenches
Patentee:
Edward M. Pfauser (exact or similar names) - Milwaukee, WI

USPTO Classifications:
403/321, 403/324, 403/328, 81/177.85

Tool Categories:
wrenches : socket wrenches

Assignees:
Blackhawk Mfg. Co. - Milwaukee, WI

Manufacturer:
Blackhawk Mfg. Co. - Milwaukee, WI

Witnesses:
none listed

Patent Dates:
Applied: Aug. 24, 1929
Granted: Feb. 07, 1933

Reissue Information:
Reissued as RE19,093 (Feb. 27, 1934)

Patent Pictures:
Edward M. Pfauser patent February 7, 1933
USPTO (New site tip)
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Description:
BLACKHAWK "LOCK-ON." A "release button" embedded in the side of a socket to depress a socket-retaining "plunger" of the sort described in patent no. 1,927,844.

Some BLACKHAWK ratchet / socket sets cite the ultimate reissue patent number RE19,287 for this design.

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