Tamper resistant pop-handle lock

Details Tamper resistant pop-handle lock Tamper resistant pop-handle lock

1992-06-15

1993-05-25

Gall, Lloyd A.

Locks

Special application

For control and machine elements

70360, 70379R, 70418, E05B 1310

Patent

active

052129721

ABSTRACT:
A tamper resistant pop-handle lock is disposed in the door of a vending machine or similar closure, and is used to restrict operation of a spring-biased handle which is seated in a recessed housing and is adapted for manually latching and unlatching the door. The lock has a cylindrical barrel and a rotatable key plug mounted within an opening in the barrel. An axially extending eccentric lug at the inner end of the plug is received in a recess formed on a retractable locking bolt, such that rotation of the plug relative to the barrel causes the locking bolt to move through a second opening in the barrel. A locking surface on the lug-receiving recess engages the eccentric lug when the key plug is in a locked position to prevent radial movement of the bolt and extension of the handle. A pair of diametrically opposed integral tabs on the key plug are engageable with corresponding slots formed in the barrel to prevent forcible axial withdrawal of the key plug from the barrel when the key plug is in the locked position.

REFERENCES:
patent: 1903765 (1933-04-01), Johnson
patent: 2023208 (1935-12-01), Olson
patent: 2046831 (1936-07-01), Lowe
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patent: 2278044 (1942-03-01), Scanlan
patent: 3299678 (1967-01-01), Spencer
patent: 3349585 (1967-10-01), Walters
patent: 3438227 (1969-04-01), Wolniak
patent: 3834198 (1974-09-01), Wiczer
patent: 4132092 (1979-01-01), Steinbach
patent: 4539828 (1985-09-01), Teleky
patent: 4552001 (1985-11-01), Roop
patent: 4760721 (1988-08-01), Steinbach
patent: 4838055 (1989-06-01), Gallagher
patent: 5038588 (1991-08-01), Hall

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