Sensing safety edge systems
First Claim
1. In a flexible safety edge system mountable to a leading edge of a movable door or the like, an improvement comprising:
- an elongated, one-piece extrusion of a flexible and resilient material, the extrusion including an elongated tubular member having an air impervious tubular wall, the extrusion further including a pair of laterally-spaced apart support legs extending outwardly from an outer side of the tubular wall, the support legs being spaced apart along an arc of the tubular wall extending over an angle of less than 180°
, the extrusion further including an elongated mounting strip extending radially outwardly from the tubular wall along the arc of the angle between the pair of support legs and to a greater radial extent than either of the pair of support legs.
1 Assignment
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Accused Products
Abstract
Each sensing safety edge system includes an elongated, one-piece, flexibly resilient, extrusion of air-impervious material. The extrusion includes an elongated hollow member with tubular wall, a pair of laterally spaced apart support legs extending radially outwardly from an outer side of the tubular wall, an elongated mounting strip extending outwardly from the tubular wall between the pair of support legs and a weather strip extending outwardly from an opposing side of the tubular member. Conical plug closures are provided in each of two opposing ends of the tubular member, preferably so as to seal the ends to air passage. The resulting safety edge is mounted on a leading edge of an overhead steel door or like movable structure. In different embodiments, a pneumatic switch, which may be an air wave responsive switch with diaphragm and adjustable bleed valve, is located outside the tubular member and is coupled with the hollow interior of the tubular member by a separate tube, which may be passed through one of the closures or transversely through the tubular wall of the extrusion. Alternatively, the tubular member may receive a pair of spaced apart opposing electrical contacts to provide an electric switch within the tubular member or may be provided with a light source and light sensor at its opposing ends to configure the safety edge for optical control.
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Citations
22 Claims
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1. In a flexible safety edge system mountable to a leading edge of a movable door or the like, an improvement comprising:
an elongated, one-piece extrusion of a flexible and resilient material, the extrusion including an elongated tubular member having an air impervious tubular wall, the extrusion further including a pair of laterally-spaced apart support legs extending outwardly from an outer side of the tubular wall, the support legs being spaced apart along an arc of the tubular wall extending over an angle of less than 180°
, the extrusion further including an elongated mounting strip extending radially outwardly from the tubular wall along the arc of the angle between the pair of support legs and to a greater radial extent than either of the pair of support legs.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A safety edge system for a movable door or the like comprising:
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an elongated, one-piece extrusion of a flexible and resilient, air impervious material, the extrusion including an elongated tubular member having an air impervious tubular wall, the extrusion further including a pair of laterally spaced apart support legs extending outwardly from an outer side of the tubular wall, the support legs being asymmetrically located on the tubular member so as to be spaced apart along an arc of the tubular wall extending over an angle of less than 180°
, the extrusion further including an elongated mounting strip extending outwardly from the tubular wall along the arc of the angle between the pair of support legs and to a greater radial extent than either of the pair of support legs;closures in each of two opposing open ends of the extruded tubular member arranged to seal opposing ends of the tubular member to air passage; an air pressure responsive switch located outside the tubular member; and at least one tube fluidly coupling a hollow interior of the tubular member sealed by the closures with the air pressure responsive switch. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification