Locks – Operating mechanism – Key
Patent
1981-06-05
1983-07-26
Wolfe, Robert L.
Locks
Operating mechanism
Key
70224, 70381, 70380, E05B 1704, E05B 6300
Patent
active
043948219
ABSTRACT:
A doorknob has a neck in rotational bearing engagement on a knob sleeve and has a pair of inner recesses which open inward to engage a driver lug and open axially to be engageable with the lug by axial knob movement. The sleeve has a cross slot adapted to contain a torque-releasable driver, biased outward to engage its lug in a recess, but with the lug so shaped that it will be cammed out of the recess under excess torque on the knob and hence release the knob and prevent transmission of the excess torque to the knob sleeve. Alternatively, the sleeve cross slot may contain a positive driver such as one having end lugs engaged in both recesses, or may contain no driver so that the knob is freely rotatable on the sleeve. The knob has a large end bore closed by a face closure member retained in place by a buried snap ring. The closure member has an inner cylindrical flange embraced by forward portions of the knob sleeve, and contains a key lock mechanism, preferably a key-removable lock core, which is non-rotatable in the closure member and oriented by engagement in a slot in the sleeve. The knob and face closure member form a self-contained assembly in which the closure member can rotate to receive the core in different orientations to suit doors of different hand, and which permits the knob to rotate as needed, without rotation of the spindle and core and closure member, to protect the lock from excess torque or to suit different functions of the lock.
REFERENCES:
patent: 2062765 (1936-12-01), Schlage
patent: 2063708 (1936-12-01), Swilens
patent: 3206958 (1965-09-01), Best
patent: 3308641 (1967-03-01), Russell et al.
patent: 3587261 (1971-06-01), Berry
patent: 3621685 (1971-11-01), Sargent
patent: 3955387 (1976-05-01), Best et al.
patent: 4007956 (1977-02-01), Harris
patent: 4052868 (1977-10-01), Best et al.
patent: 4195502 (1980-04-01), Best et al.
patent: 4312201 (1982-01-01), Roos
Foshee application Ser. No. 163,472, filed Jun. 27, 1980.
Best Walter E.
Foshee William R.
Best Lock Corporation
Wolfe Robert L.
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