Door operator
First Claim
1. An operator for use in combination with a source of electrical energy and for moving a door between an open position and a closed position in difficult situations caused by heavy doors, windy conditions, stack pressure, negative plant pressures, tight seals, etc., said operator comprising:
- (a) linkage means for being attached to said door;
(b) a motor assembly for being coupled to said source of electrical energy, said motor assembly having a drive shaft; and
(c) drive train means for coupling said drive shaft of said motor assembly to said linkage means and for allowing said motor assembly to move said door to said open position and to said closed position under power, said drive train means including an electrical mechanical clutch means for being coupled to said source of electrical energy for being activated when electrical energy passes from said source of electrical energy to said clutch means and for selectively disconnecting said linkage means from said drive shaft of said motor assembly if the torque required to move said door between said open and closed positions increases above a certain amount for completely disconnecting said linkage means from aid drive shft of said motor assembly in the event not electrical energy passes from said source of electrical energy to said clutch means, said drive train means including variable torque control means for varying said certain amount of torque required before said clutch means disconnects said linkage means from said drive shaft of said motor assembly.
5 Assignments
0 Petitions
Accused Products
Abstract
An operator for moving a door between an open position and a closed position. The operator includes linkage for being attached to the door; a motor assembly having a drive shaft; and a drive train for coupling the drive shaft of the motor assembly to the linkage structure, the drive train includes a clutch for selectively disconnecting the linkage from the drive shaft of the motor assembly and a variable torque control assembly for varying the torque produced by the clutch.
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Citations
14 Claims
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1. An operator for use in combination with a source of electrical energy and for moving a door between an open position and a closed position in difficult situations caused by heavy doors, windy conditions, stack pressure, negative plant pressures, tight seals, etc., said operator comprising:
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(a) linkage means for being attached to said door; (b) a motor assembly for being coupled to said source of electrical energy, said motor assembly having a drive shaft; and (c) drive train means for coupling said drive shaft of said motor assembly to said linkage means and for allowing said motor assembly to move said door to said open position and to said closed position under power, said drive train means including an electrical mechanical clutch means for being coupled to said source of electrical energy for being activated when electrical energy passes from said source of electrical energy to said clutch means and for selectively disconnecting said linkage means from said drive shaft of said motor assembly if the torque required to move said door between said open and closed positions increases above a certain amount for completely disconnecting said linkage means from aid drive shft of said motor assembly in the event not electrical energy passes from said source of electrical energy to said clutch means, said drive train means including variable torque control means for varying said certain amount of torque required before said clutch means disconnects said linkage means from said drive shaft of said motor assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. The combination with a door movable between an open position and a closed position and a source of electrical energy, of a power open, power close operator for moving said door between said open position and said closed position in difficult situations caused by heavy doors, windy conditions, stack pressure, negative plant pressures, tight seals, etc., said operator comprising:
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(a) linkage attached to said door; (b) a motor assembly coupled to said source of electrical energy for being powered when electrical energy passes from said source of electrical energy to said motor assembly, said motor assembly having a drive shaft; and (c) a drive train coupling said drive shaft of said motor assembly to said linkage and allowing said motor assembly to move said door to said open position and to said closed position under power, said drive train including an electrical mechanical clutch means coupled to said source of electrical energy for being activated when electrical energy passes from said source of electrical energy to said clutch means;
said clutch means being positioned between said drive shaft of said motor assembly and said linkage for disconnecting said linkage from said drive shaft of said motor assembly when the force required to move said door increases above a certain amount and for completely disconnecting said linkage means from said drive shaft of said motor assembly in the event not electrical energy passes from said source of electrical energy to said clutch means, said drive train including variable torque control means for varying said certain amount of force required before said clutch means disconnects said linkage from said drive shaft of said motor assembly. - View Dependent Claims (12, 13, 14)
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Specification