Cylinder lock with force-immune knob

Details Cylinder lock with force-immune knob Cylinder lock with force-immune knob

1979-08-31

1982-01-26

Wolfe, Robert L.

Locks

Operating mechanism

Key

70224, E05B 6300

Patent

active

043122019

ABSTRACT:
A cylindrical lock structure having a key-removable core in its outer knob, modified to provide a function as for hotel room use in which it is operable from the outside by key operation only and the outside knob sleeve or spindle is locked against bolt-retracting rotation relative to the chassis hub, is rendered immune to forcing from the application of excess torque to the outer knob, by mounting the knob neck rotatably on the knob sleeve and hub structure and by providing a rotative slip fit at the periphery of the face plate which closes the core-passing opening at the outer end ot the knob handle and supports such end from the knob sleeve, so as to allow the knob to rotate freely on the non-rotative knob sleeve and hub, and thereby prevent the application of excess torque to the locked knob sleeve.

REFERENCES:
patent: 3621685 (1971-11-01), Sargent
patent: 3955387 (1976-05-01), Best
patent: 4195502 (1980-04-01), Best
patent: 4201069 (1980-05-01), Katayama

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