Locks – Operating mechanism – Key
Patent
1996-07-18
1998-06-09
Meyers, Steven N.
Locks
Operating mechanism
Key
70381, 70134, 292DIG60, E05B 908
Patent
active
057619379
ABSTRACT:
An auxiliary lock comprises a latch assembly having an elongated casing to be received by a first horizontal bore extending into the end of the door. A cylinder mechanism is received by a second horizontal thru bore extending, from one face of the door to the other face of the door and intersecting the first bore. The cylinder mechanism includes a cylinder having a chimney, a cylindrical guard having an annular door engaging surface, an annular lip projecting inwardly from the annular door engaging surface to be received by the second thru bore, a cylindrical segment projecting inwardly from the annular lip, and a strut projecting radially upwardly from one circumferential end of the segment and defining therewith a shaped structure. The strut has a length selected so that the shaped structure lies proximate the bottom of the casing to thereby prevent the rotation of the said guard.
REFERENCES:
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patent: 4073172 (1978-02-01), Schlage
patent: 4338804 (1982-07-01), Solovieff
patent: 4489576 (1984-12-01), Mullich et al.
patent: 4869083 (1989-09-01), DeMarseilles et al.
patent: 5316353 (1994-05-01), McKernan
patent: 5351513 (1994-10-01), Ellis
Emhart Inc.
Meyers Steven N.
Pham Tuyet-Phuong
Smith Spencer T.
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