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. 02, 2019
Filed:
Jun. 16, 2014
Thyssenkrupp Elevator Corporation, Atlanta, GA (US);
Anthony Frank Hamlett, Franklin, TN (US);
Roy Walker, Bartlett, TN (US);
Gary Hooper, Rathdrum, ID (US);
ThyssenKrupp Elevator Corporation, Atlanta, GA (US);
Abstract
A pumping unit for use with a hydraulic elevator system includes a reservoir storing fluid, a first pump, and a second pump. The first pump is coupled with the reservoir and the elevator system to communicate fluid between the reservoir and the elevator system to actuate the elevator system. The second pump is also coupled with the reservoir and the elevator system to communicate fluid between the reservoir and the elevator system to actuate the elevator system. The second pump is selectively actuatable when the first pump is inactivated.