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:
Aug. 22, 2017
Filed:
Jan. 30, 2015
Thyssenkrupp Elevator Ag, Essen, DE;
Frank P. Dudde, Collierville, TN (US);
Peter F. Feldhusen, Collierville, TN (US);
William K. Delk, Olive Branch, MS (US);
Mike Palazzola, Horn Lake, MS (US);
Jie Xu, Cordova, TN (US);
Alan M. Parker, Byhalia, MS (US);
John Keith Anderson, Jackson, TN (US);
Olivia Stone, Memphis, TN (US);
THYSSENKRUPP ELEVATOR AG, Essen, DE;
Abstract
A hydraulic-boosted rail brake is provided for use with an elevator having a guide rail. The rail brake includes a braking plate having friction material, a spring package in communication with the braking plate, a hydraulic cylinder, a piston housed at least partially inside the hydraulic cylinder, and a brake controller. The braking plate is selectively movable relative to the guide rail, and the spring package biases the friction material to interact with the guide rail to cause braking. The piston is in communication with the braking plate and is selectively: (a) movable in a release direction to diminish or overcome force from the spring package; and (b) movable in an engage direction to supplement the force from the spring package. The brake controller selectively causes the piston to move in the release direction and in the engage direction.