The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 1999
Filed:
Aug. 19, 1997
James C Stevens, Mooresville, IN (US);
Robert Utterback, Indianapolis, IN (US);
James D Rhoads, Reading, PA (US);
Dorma Door Controls, Inc., Reamstown, PA (US);
Abstract
The present invention relates to a door operating system for controlling the movement of a door, the system having a motor with a motor shaft for providing rotational energy to the system and a gear chain assembly for receiving the rotational energy from the motor shaft and applying the received rotational energy to the door to move the door, comprising a sprocket rotatably mounted on the gear chain assembly for rotation around an axis of the gear chain assembly and fixedly coupled to the motor shaft for receiving and transmitting the rotational energy from the motor shaft; a drive pin fixedly disposed on the sprocket for rotational movement around the axis of the gear chain assembly as the sprocket rotates around the axis; a rotational energy receiving extension rotatably mounted on the gear chain assembly and drivingly coupled to the door for moving the door; a drive dog fixedly disposed on the energy receiving extension for rotational movement around the axis of the gear chain assembly as the energy receiving extension rotates around the axis; and the sprocket and the extension being disposed on the gear chain assembly such that rotational movement of the sprocket causes the drive pin to rotatably move into contact with the drive dog and apply rotational energy to the drive dog thereby transmitting rotational energy to the door when rotating in one direction and moving away from the drive dog when rotating in the other direction.