U-lock keyway protector

Details U-lock keyway protector U-lock keyway protector

1997-09-02

1998-11-10

Boucher, Darnell M.

Locks

Parts, attachments, accessories and adjuncts

For key-operated mechanism

70424, 70 39, 70 38A, E05B 1718

Patent

active

058327622

ABSTRACT:
A U-lock keyway protector comprising a cylindrical tube mounted for rotation on a U-lock crossbar. The keyway protector generates enough friction against the crossbar to allow only manual rotation, and it provides a secure grip for ease in rotation. A keyway aperture allows access to the U-lock keyway when in an unprotective position and denies access when in a protective position. When the U-lock is engaged, a shackle leg extends through a shackle slot, preventing longitudinal movement of the keyway protector along the crossbar. A lip at the edge of the keyway protector limits the distance that the keyway protector can be slipped onto the crossbar and eliminates alignment problems.

REFERENCES:
patent: 1195808 (1916-08-01), Grgich
patent: 1662612 (1928-03-01), Junkunc
patent: 2247592 (1941-07-01), Swift
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patent: 4286445 (1981-09-01), Sills
patent: 4584855 (1986-04-01), Burlingame
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patent: 4918949 (1990-04-01), Newbold
patent: 5010746 (1991-04-01), Zane et al.
patent: 5257517 (1993-11-01), Dale
patent: 5505064 (1996-04-01), Wang
patent: 5535609 (1996-07-01), Kuo
patent: 5706679 (1998-01-01), Zane et al.

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