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US Patent: 4,644,831
Adaptor Sleeve
Patentee:
Miriam Yang (exact or similar names) - Ta Li Hsiang, Taichung Hsien Taiwan

USPTO Classifications:
81/125, 81/439, 81/452

Tool Categories:
industrial tools : tool holders

Assignees:
None

Manufacturer:
Unknown

Witnesses:
none listed
Patent Dates:
Applied: Jul. 05, 1985
Granted: Feb. 24, 1987

Patent Pictures:
Miriam Yang patent February 24, 1987
USPTO (New site tip)
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Description:
Holder socket, with an internal "U" shaped spring retaining clip.

Known example appears on a 1/4" hex-drive flexible shaft extension for screwdriver or nut driver bits. It is marked U.S.A. PAT 4644831 ROC PAT 27181.

Cites pat. nos. 717,199, 853,930, 1,056,848, 2,158,728, 2,677,294, 3,665,791, and 3,935,762.

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