Locks – Portable – Padlocks
Patent
1983-06-29
1986-04-29
Dorner, Kenneth J.
Locks
Portable
Padlocks
70 39, 70423, 70455, E05B 6704
Patent
active
045848556
ABSTRACT:
A pick-proof u-bolt type lock is disclosed with an untypical location for containing its cylinder lock. A tube, comprising a housing, has openings near its ends that accept the ends of a shackle which are secured within that housing. A cylinder lock is located between the shackle openings and an access port is provided to it for insertion and withdrawal of the key. A matching port on a collar that rotates around the housing is positioned to shut off that access, or to allow it selectively.
Cooperating parts attached to, and effecting the operation of the lock, work to make the lock inoperable while access to the keyhole is available; and allow normal function of the lock when rotation of the collar prevents access. The key is not turned by finger grip, but instead, affecting the closure, turns the key and plug operating the cylinder lock and releasing the shackle at one end. The remaining end is freed as it swings clear of a securing pin in the other end of the housing.
An enclosed operating key may continue to remain attached to an outside device, such as a key ring, a narrow slot through which the connection may pass is provided on the perimeter of the access port.
REFERENCES:
patent: 1222545 (1917-04-01), Gross
patent: 1334292 (1920-03-01), Cox
patent: 2834195 (1958-05-01), Stackhouse
patent: 3267707 (1966-08-01), Adams
patent: 3621688 (1971-11-01), Asmar et al.
patent: 3680337 (1972-08-01), Krakauer
patent: 3714804 (1973-02-01), French
patent: 3765199 (1973-10-01), Wiczer
patent: 3855826 (1974-12-01), Hori
patent: 4085600 (1978-04-01), Bindari
Dorner Kenneth J.
Gall Lloyd A.
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