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:
May. 22, 1990
Filed:
Feb. 13, 1989
Arnold M Morris, Chester Twp., Morris County, NJ (US);
Daphne D'Zurko, Pompton Lakes, NJ (US);
Richard H Pilsbury, Demarest, NJ (US);
J Warren Barkell, Jr, Penn Twp., Westmoreland County, PA (US);
Karl B Orndorff, Bonneauville Boro, Adams County, PA (US);
Lawson Randall S, Gettysburg, PA (US);
Inventio AG, Hergiswil, CH;
Abstract
An elevator car having a clutch pivotally carried by a car door and biased to an operative position in which drive rollers of an adjacent hatch door may be engaged by 'open' and 'close' vanes. A first parallelogram linkage operates the close vane in direct response to car door position, in a direction opposite to initial car door opening movement. A second parallelogram linkage, associated with the open vane, is operated when the open vane contacts a hatch door roller at the start of door opening, to unlock the car door by retracting a plunger from an opening in the car door sill. The car door clutch bias may be manually overcome by authorized maintenance personnel, to disengage the car door from a hatch door.