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:
Jul. 19, 2011
Filed:
Aug. 31, 2007
Miroslav Kostka, Ballwil, CH;
Miroslav Kostka, Ballwil, CH;
Inventio AG, Hergiswil NW, CH;
Abstract
Safety equipment for an elevator installation with an upper elevator car and a lower elevator car, which cars are both movable substantially independently along a vertical direction in a common elevator shaft of the elevator installation includes a first electro-optical detection system with a first light source in a lower region of the upper elevator car and with a first detector which comprises a light-sensitive first sensor region in an upper region of the lower elevator car. The first light source issues a focused first light beam at a first angle with respect to the vertical direction. The first angle is predetermined such that on approach of the upper and the lower elevator cars the first light beam is incident on the first sensor region and thus is detectable by the first detector. In this case, the first detector triggers a reaction.