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:
Sep. 09, 2014
Filed:
Mar. 16, 2009
Daryl J. Marvin, Farmington, CT (US);
Greg A. Schienda, Plantsville, CT (US);
Harold Terry, Avon, CT (US);
James M. Draper, East Hartland, CT (US);
Anthony Cooney, Unionville, CT (US);
Jose M. Carballo, Tampa, FL (US);
Daryl J. Marvin, Farmington, CT (US);
Greg A. Schienda, Plantsville, CT (US);
Harold Terry, Avon, CT (US);
James M. Draper, East Hartland, CT (US);
Anthony Cooney, Unionville, CT (US);
Jose M. Carballo, Tampa, FL (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
An elevator systemincludes an over-acceleration and over-speed protection system capable of triggering a machine room brake and a safety trigger when over-speed or over-acceleration conditions are detected. The system includes a speed detectorand an acceleration detector. Based upon sensed speed and sensed acceleration, the controllercalculates a filtered speed of an elevator mass such as an elevator caror counterweight, and compares the filtered speed to the threshold speed to determine whether an over-speed condition has been reached. The controlleractivates a machine room brake when an over-speed condition exists, and engages an elevator safetyA,B when it determines that the elevator mass is still in an over-speed condition after the machine room brake has been activated.