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:
May. 13, 2003
Filed:
May. 30, 2001
Peter S. Schulte, East Dubuque, IL (US);
Rite-Hite Holding Corporation, Milwaukee, WI (US);
Abstract
A counteraction system for a sectional door includes a counterweight system that helps counterbalance the weight of the door and helps hold the door in place when the door is fully open. The counterweight system comprises a suspended string of individual deadweights. As the door opens, the weights sequentially lower onto the floor, in a stacked arrangement, one atop the other. Thus, the hanging weight of the counterweight system decreases as the door opens. To avoid having the counterweight system slam the door open against a hard stop, the counteraction system also includes a brake system that helps bring the door to a smooth stop at the door's fully open position. In some embodiments, the brake system includes a cable that traverses the direction that the door travels. As the door approaches its open position, a protrusion on the door catches the cable, which deflects to decelerate the door.