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. 08, 1978
Filed:
Jul. 13, 1977
Robert J Lyons, Hamden, CT (US);
Other;
Abstract
Mounting means for a door-check for a hatchway door hinged to swing between an elevated open position and a closed position and having torsion bars which serve not only as springs for counterbalancing the weight of the door, but also as the hinge pins for the door. Each torsion bar has a terminal portion which is bent backwardly into parallel relation with a straight portion, the terminal portion extending through the hinge and forming the hinge pin. The straight portion is secured at its other end to the hatchway frame and is twisted about the terminal portion by the hinge as the door is closed. The door-check member is mounted on the hatchway frame and is connected to a bracket mounted across the crook formed in the torsion bar where the terminal portion bends backward. The bracket therefore pivots about the hinge pin with the main portion of the torsion bar when the door is closed and provides a crank arm for actuating the door-check.