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:
Apr. 21, 2015
Filed:
Jun. 07, 2006
Richard C. Mccarthy, Simsbury, CT (US);
Richard Peruggi, Glastonbury, CT (US);
Randall K. Roberts, Hebron, CT (US);
Greg A. Schienda, Plantsville, CT (US);
Harold Terry, Avon, CT (US);
Gilbert W. Wierschke, Littleton, CO (US);
Richard C. McCarthy, Simsbury, CT (US);
Richard Peruggi, Glastonbury, CT (US);
Randall K. Roberts, Hebron, CT (US);
Greg A. Schienda, Plantsville, CT (US);
Harold Terry, Avon, CT (US);
Gilbert W. Wierschke, Littleton, CO (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
A pair of elevator cars () traveling in the same hoistway have their positions sensed (--) to provide for each a position signal () from which velocity signals () are derived; lookup tables () of safe stopping distance (B, S) for braking and safeties are formed as a function of all possible combinations of velocity (V(U), V(L)) of said cars. Comparison of safe stopping distances for contemporaneous velocities of said cars with actual distance between said cars provides signals () to drop the brakes () of one or more of the cars, and provides signals () to engage the safeties () of all cars if the cars become closer or if acceleration detectors () determine a car to be in freefall.