Pneumatic safety edge for power operated door

• US 3,303,303 A
• Filed: 10/02/1964
• Issued: 02/07/1967
• Est. Priority Date: 10/02/1964
• Status: Expired due to Term

• Current Assignee: Norman K. Miller
• Original Assignee: Norman K. Miller
• Inventors: Miller, Norman K.
• Application Number:
  US04/401,141
• Time in Patent Office: 858 Days
• US Class Current: 200/61.43
• CPC Class Codes: E05F 15/47 responsive to changes in fluid pressure
• CPC Class Codes: E05Y 2900/132 Doors
• CPC Class Codes: H01H 3/24 using pneumatic or hydraulic actuator for storing energy in a spring motor H01H3/301

Claims

1. IN COMBINATION, A DOOR, AN ELECTRIC MOTOR FOR OPERATING THE DOOR, A PNEUMATICALLY CONTROLLED SWITCH REMOTE FROM THE DOOR AND ELECTRICALLY CONNECTED TO THE MOTOR, AN ELONGATE FOAM-RUBBER STRUCTURE EXTENDING ALONG AND PROJECTING FROM THE CLOSING EDGE OF THE DOOR, SAID STRUCTURE HAVING A LONGITUDINALLY EXTENDING INTERNAL CHAMBER SUBSTANTIALLY COEXTENSIVE THEREWITH, A FIRST TUBE OF AIR-IMPERVIOUS FLEXIBLE MATERIAL HAVING ONE END CLOSED AND DISPOSED LONGITUDINALLY WITHIN SAID CHAMBER SUBSTANTIALLY COEXTENSIVE THEREWITH, SAID TUBE BEING CONFIGURED FOR SNUG CONFORMING ENGAGEMENT IN SAID CHAMBER AND HELD BY THE WALLS THEREOF AGAINST DISPLACEMENT IN SAID CHAMBER WHILE BEING DEFORMABLE UNDER PRESSURE DEFORMING SAID STRUCTURE, A SECOND TUBE OF AIR-IMPERVIOUS MATERIAL CONNECTED IN FLUID COMMUNICATION BETWEEN THE OTHER END OF SAID FIRST TUBE AND SAID SWITCH TO TRANSMIT A FLUID-PRESSURE IMPULSE THEREBETWEEN AND OPERATE SAID SWITCH.