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:
Oct. 22, 1985
Filed:
Jan. 31, 1984
Hyok S Lew, Arvada, CO (US);
Michael Stranahan, Woody Creek, CO (US);
Other;
Abstract
This invention relates to a spring biased shifting pivoting center hinge for swinging doors wherein the hinge pin rigidly affixed to the first swinging half of the hinge pivotably and shiftably engages a slotted hole with a spring bias that is included in the second swinging half of the hinge. The spring bias resiliently retains the hinge pin at one extremity of the slotted hole when there is no external constraint as in the case of a fully closed or fully open swinging door fitted flush to the front face of the door frame. When the swinging door is pulled open or pushed shut, the edge of the door adjacent to the hinge interferes with the door frame and the hinge pin is forced to shift toward the other extremity of the slotted hole against the spring bias; whereby, the interference between the door edge adjacent to the hinge and the door frame is alleviated for the full range of the swing for the swinging door.