Closure fasteners – Operators with knobs or handles
Patent
1998-03-13
2000-05-30
Dayoan, B.
Closure fasteners
Operators with knobs or handles
292DIG62, 70212, E05B 300
Patent
active
060683082
ABSTRACT:
A latching assembly that requires three distinct operations must be performed with two hands to allow the handle of the latch assembly to be rotated to unlock a door from a door frame. The assembly provides substantial flexibilities in installation. A base portion having a sleeve which defines an aperture is secured to a door and receives a handle portion with a shaft attached, the shaft extending through the aperture in the sleeve. Cooperative rotation restriction portions on the handle and on the base portion restrict the rotation of the handle to a limited range. The limited rotation range may be altered by selectively positioning a key guide in one of the cooperative rotation restriction portions. A first release mechanism comprising a trigger portion which extends from the handle and a detent which engages a detent opening in the base portion requires depression of the trigger portion before rotation of the handle to an unlatched position. The detent mechanism is within the handle and a cap contains and encloses in the detent mechanism. The cap portion has a bore which receives a second release mechanism which has a shaft portion which may be exteriorly manipulated to move an obstructing member into or out of an obstructing relation with the detent. Thus, the second release mechanism must be manipulated to allow release of the trigger portion which must then be depressed to allow rotation of the handle. The cap portion is secured in the handle by screws or other threaded members extending from the handle base portion interface into the cap.
REFERENCES:
patent: 4583775 (1986-04-01), Bisbing
patent: 4763935 (1988-08-01), Bisbing
patent: 5299597 (1994-04-01), Fort
patent: 5390517 (1995-02-01), Yamada
patent: 5634357 (1997-06-01), Nutter
patent: 5664448 (1997-09-01), Swan
Austin Hardware, Inc.
Dayoan B.
Estremsky Gary
Voigt II Edwin E.
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