Movable or removable closures – Processes
Patent
1997-02-26
1999-06-22
Stodola, Daniel P.
Movable or removable closures
Processes
49 26, 49 31, 74 8915, 74 8917, E06B 300
Patent
active
059137630
ABSTRACT:
A method for selective alteration and control of door movement modes utilizing an apparatus that is primarily non-hydraulic and incorporated with a known mechanism which is functional independently from the apparatus in one mode of operation and which includes a piston for controlling door closing characteristics by selected fluid flow within the mechanism. The apparatus includes a motor driven lead screw having a linearly movable shuttle unit mounted thereon, the shuttle unit being positioned relative to the piston of the mechanism to accommodate nonattached contact with the piston to urge the piston, when the shuttle unit is moved, in a direction that will at least provide selective assistance with door opening in another mode of operation. Operation of the apparatus is controlled by programming of a related controller including non-volatile memory.
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Andrea Davide
Beran Mark A.
Cohen Curtis
Dorma Door Controls Inc.
Stodola Daniel P.
LandOfFree
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