Movable or removable closures – With means mounting closure for reciprocation – With counterbalance
Patent
1994-09-19
1996-10-22
Kannan, Philip C.
Movable or removable closures
With means mounting closure for reciprocation
With counterbalance
49360, 49379, E05F 300, E05F 1100
Patent
active
055665080
ABSTRACT:
An apparatus is disclosed for mounting a chamber door between open and closed positions relative to the opening of a sterilizer or autoclave chamber. The apparatus is adapted to be used in either motorized or non-motorized embodiments. The weight of the chamber door is offset by a counterweight and suspended using a cable and pulley system. In the non-motorized embodiment, the door/counterweight system is held in place by a securement, which, when disengaged, permits free motion of the door. In the motorized embodiment, a second cable and pulley system is used to connect the door and counterweight. The cable from this second system is looped around a sheave which is adapted to provide a predetermined frictional force. The sheave is then connected to and rotated by a motor, and upon activation of the motor, the rotating sheave displaces the cable, which respectively raises or lowers the door and counterweight. In the event that the door is obstructed during operation or forced open, the cable will slip harmlessly along the sheave, and will neither injure the operator nor induce damaging torques in the motor.
REFERENCES:
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patent: 5216782 (1993-06-01), Schenck et al.
patent: 5237777 (1993-08-01), Houston et al.
patent: 5249392 (1992-10-01), Houston et al.
American Sterilizer Company
Kannan Philip C.
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