US 5,515,649 A · Automatic door operator

Abstract

A door operating system is disclosed which includes a remotely or manually controlled fluid supply system (10) which pressurizes a reciprocable striker release assembly (50), and activates an opening cylinder assembly (30) functionally mounted to a door (17) and door frame (18) for opening the door. Components of the door operating system include: an air compressor (11); a fluid pressure regulator (15) for ensuring, by virtue of a higher pressure, that the striker release assembly (50) is actuated in a timely manner with respect to the opening of the door due to activation of an opening cylinder (32) and for controlling the power and the speed that the door opens; a three-way solenoid valve (12), manually or remotely actuated, for releasing pressurized fluid to the opening cylinder (32) during the opening cycle and discharging fluid during the closing cycle thereby permitting closing of the door; a pair of clevis brackets (31,33), and a door frame bracket (35) for ease in installation of the opening cylinder (32); and a door closer ( 34) mounted on a side of the door opposite to the opening cylinder location.

Claims19

Dependent claims

A door operating system for attachment to a hinged door and a door frame, the door operating system is operative to push a spring-biased door latch mounted in the door during an opening cycle of said door operating system, said door operating system comprising:

a fluid supply system providing pressurized fluid to the door operating system, said fluid supply system including a valve for selectively supplying said pressurized fluid;
an opening cylinder for opening said door, the opening cylinder including brackets mounting said opening cylinder to a first side of said door and door frame, said cylinder further including a port which is supplied with said pressurized fluid for opening said door;
and a striker release assembly mounted in said door frame for pushing said door latch to a retracted position, thereby allowing opening of the door, wherein the striker release assembly includes a striker release cylinder which is operatively connected to said pressurized fluid supply, and wherein said striker release cylinder includes a plunger shaft for pushing said door latch and otherwise reciprocating from an activated to a deactivated position with respect to said door latch.

Dependencies are inferred from the claim text.

Automatic door operator

Life of this patent

Automatic door operator

Life of this patent

Abstract

Claims19