Fastening nuts with loosening assist functions

Details Fastening nuts with loosening assist functions Fastening nuts with loosening assist functions

2007-05-22

2007-05-22

Sandy, Robert J. (Department: 3677)

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Internally threaded fastener element, e.g., nut, etc.

Multipart

C411S265000

Reexamination Certificate

active

11115227

ABSTRACT:
A fastening nut includes an operation member, a female threaded member, and a control device. The operation member is operable by an operator to rotate in a fastening direction and a loosening direction. The control device is coupled between the operation member and the female threaded member and includes a plurality of movable members, such as nut segments and wedge members, and a plurality of control members, such as rollers and balls. The movable members are arranged in a circumferential direction about the nut axis. Each movable member is movable between a first position and a second position. The first positions enables fastening of the female threaded member onto the male threaded member. The second position enables loosening of the female threaded member. The control members either prevent or allow the movement of each movable member from a first position to a second position.

REFERENCES:
patent: 4850154 (1989-07-01), Grammer et al.
patent: 4941790 (1990-07-01), Kirn
patent: 5042207 (1991-08-01), Kirn
patent: 5175963 (1993-01-01), Schafer et al.
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patent: 5388942 (1995-02-01), Bonacina et al.
patent: 6149364 (2000-11-01), Maeda
patent: 6273659 (2001-08-01), Goto
patent: 6887018 (2005-05-01), Ostermeier
patent: 4-118972 (1992-10-01), None
patent: 04-118972 (1992-10-01), None

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