Abstract:
A drive assembly for a sliding door is disclosed, the drive assembly having a power drive unit for providing a rotational force to rotate a cable drum of the drive assembly, the power drive unit being mounted within the sliding door; a cable having one end secured a guide track of the drive assembly and another end secured to the guide track; a roller assembly configured to slidably engage the guide track; an arm fixedly secured to the sliding door and pivotally mounted to the roller assembly at a pivot point; a pulley rotationally mounted to the roller assembly, the axis of rotation of the pulley being aligned with the pivot point and the cable engages the pulley in opposite directions as the cable drum rotates and the roller assembly slides along the guide track as the cable drum rotates, wherein movement of the roller assembly causes movement of the sliding door.
Abstract:
Apparatus (10) for use with barrier movement systems (16) in which a flexible member (26, 26') is used to move or support the barrier. The apparatus measures tension in the flexible member and generates a signal when the tension eases beyond a predetermined point. Additionally, the apparatus includes a stop member (83) which moves in response to easing tension to a position to stop further barrier movement.
Abstract:
An operator for opening and closing movable barriers such as garage doors comprising a pass-point limit system which is a component of an operating head. An operator for a rolling shutter or gate can be installed on either side of the opening. A dual pass-point system provides a unique pass-point regardless of direction of mounting the operator, regardless of the direction of travel for opening the barrier, and regardless of installation configuration, eliminating the need for the installer to know which direction the motor is rotating or the barrier is travelling. The operator automatically learns both the open and close limits, regardless of direction of travel and without having to press a learn switch to set the open and close limits.
Abstract:
A door has a door leaf (10) which may be moved overhead between an open and closed position and which is connected by means of a traction cable system to a weight-balancing device, driving motor or another similar power source. The traction cable system has at least one cable unit (21) secured at one end to the door leaf and fixed at the other end. In order to dispense with catching means and ensure a longer service life, at least one of the cable units (21) has two cables (21', 21'') loaded approximately in parallel and combined by their associated ends each to a building element. At least one of said building elements is designed as a cable tension compensating device.
Abstract:
A door has a door leaf (10) which can be moved overhead between a closed and an open position and a weight-balancing device connected at one end to the door leaf and fixed at the other end. The weight-balancing device has one or several helical spring units space-savingly designed in such a way that the helical spring unit or units (16) are made of at least two driven helical springs loaded in parallel, of which the inner one has a helix with an outer diameter which is smaller than the inner diameter of the helix of the outer spring. The helical springs are coaxially arranged or nested one inside the other. Seen in the same longitudinal axial direction, one spring is wound clockwise and the adjacent spring is wound anti-clockwise, so that the helices of adjacent springs cross each other.
Abstract:
Die Erfindung betrifft einen Antriebsgurt (28) bestehend aus einem textilen Band (46) als Zugbelastung aufnehmenden Grundkörper (42) und Zahnausbildungen (44), die beabstandet zueinander an dem textilen Band (46) angebracht sind, dadurch gekennzeichnet, a) dass wenigstens einer, einige oder alle der Zahnausbildungen (44) einen sich quer zur Längsrichtung des Bandes (46) erstreckenden Hauptkörper (60) und wenigstens einen sich von dem Hauptkörper (60) in Längsrichtung des Bandes (46) erstreckenden Längsverstärkungsvorsprung (72) haben, und/oder b) dass das Band (46) mehrere in Längsrichtung beabstandete textile Querverdickungsbereiche (74) hat, die fest mit mehreren sich entlang der Länge des Bandes (46) erstreckenden im Wesentlichen parallel mit Abstand zueinander angeordneten textilen Längsverdickungsbereichen (50) verbunden sind, wobei zwischen den Längsverdickungsbereichen (50) und den Querverdickungsbereichen (74) schwächere textile Bereiche (52) ausgebildet sind.