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:
Mar. 30, 1993
Filed:
Jul. 25, 1991
Edward E Gayhart, Jr, North Canton, OH (US);
John W Coursen, Copley, OH (US);
Dwight R Kirk, Massillon, OH (US);
The Babcock & Wilcox Company, New Orleans, LA (US);
Abstract
An access door assembly for a pressurized windbox, comprising a door frame having an opening with a post extending from the door frame. A door is pivotally mounted to the frame at a hinge. A latch is pivotally mounted to the door and includes a hook which engages the post for locking the door to the frame. The latch also includes a catch member extending beyond the hook for catching the post when the latch is moved to unlock the door. This stops the door in an intermediate partly open position allowing gusts of air to blow through the opening thereby giving the operator a warning and indication that the windbox is in fact under pressure. In this manner, an operator has sufficient time to step out of the way before moving the latch further, thereby fully disengaging the latch from the post and allowing the door to open fully.