Locking device

Details Locking device Locking device

1996-04-05

1997-09-23

Boucher, Darnell M.

Locks

Portable

Padlocks

70 39, 70387, 70377, 70386, E05B 6722

Patent

active

056692544

ABSTRACT:
A locking device which includes a casing, a U-shackle, two locking plates mounted in the casing to lock the U-shackle in the casing, a lock cylinder driven by a card to release the locking plates from the U-shackle, wherein the lock cylinder includes a mounting shell mounted in the casing, a tumbler holder mounted within the mounting shell to hold a set of tumblers, a set of springs, and a set of steel balls, the steel balls being displaced to release the tumblers from the mounting shell for permitting the tumbler holder to be lifted to unlock the locking plates when the card is inserted through a card slot on the casing into a bottom slot on the mounting shell and a bottom slot on the tumbler holder.

REFERENCES:
patent: 158111 (1874-12-01), Miller
patent: 964331 (1910-07-01), Stone
patent: 1451860 (1923-04-01), Best
patent: 3834197 (1974-09-01), Sedley
patent: 4587815 (1986-05-01), Gil
patent: 4838058 (1989-06-01), Matsumoto
patent: 5146770 (1992-09-01), Yun-Sheng
patent: 5331330 (1994-07-01), Su
patent: 5417092 (1995-05-01), Iu

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