B - Operations – Transporting – 25 – B
Patent
B - Operations, Transporting
25
B
81/33
B25B 23/02 (2006.01) B25B 23/10 (2006.01)
Patent
CA 1227676
34 ABSTRACT The invention is intended for use with threaded fasteners, screws, bolts and similar devices, in their almost limitless applications to assembling objects and structures. These fasteners exist in many types, each requiring a special tool bit. On many occasions screws or other fasteners must be installed or removed in locations difficult of access and of which clear view may not be obtained, also where use of two hands is not possible. This invention is particu- larly intended for these situations. The invention comprises basically a combination of a barrel (11 or 811) and collar (20 or 201), preferably made of stiff but flexible plastic, which fit over and enclose a tool for threaded fasteners, either with a fixed bit or one which can accept insertable bits. The barrel (11) pro- vides at its working or tip end a set of flexible elements (31) which act to grip screw heads and hold them registered with the tool. The barrel (11) can be fixed in place on the tool shaft by a partial turn of either form of collar (20 or 201). Collar (201) works with a spring (202) to move the barrel (11) into gripping position. A variation for jewel- ers' screwdrivers uses a miniature barrel (170) without a collar but with a spring (202).
429800
Marbourg Edgar F. Jr.
Michaels & Associates
LandOfFree
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