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:
Nov. 05, 1991
Filed:
Jul. 16, 1990
Applicant:
Inventors:
Donald P McManigal, Palos Heights, IL (US);
David G Yaksic, Orland Park, IL (US);
John McHugh, Chicago, IL (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E05C / ;
U.S. Cl.
CPC ...
292 60 ; 292 62 ; 292 11 ; 292D / ; 292D / ;
Abstract
A lock mechanism for safely locking doors, such as trailer-tractor vehicle doors and for controllably releasing same including a reciprocal or rotatable locking member such as a sliding bolt movable up through the floor of a trailer to a first locking position wherein a door is positively locked and a release position wherein the vehicle door is released with the locking member housed in a tamper-proof box with a pivotal panel that is held shut by a latch released by a latch operator means which is activated by an air drive that can be primarily operated only when connected to the air pressure system of a vehicle.