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:
Sep. 17, 1991
Filed:
Sep. 06, 1989
Applicant:
Inventors:
Assignee:
K.K. Sankyo Seiki Seisakusho, Nagano, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E05F / ;
U.S. Cl.
CPC ...
16 64 ; 16 49 ;
Abstract
Herein disclosed is a continuous speed change type door check for closing a door, which comprises: a pivot pin made rotatable; a slider adapted to be linearly moved by the rotations of the pivot pin and to rotate the pivot pin when it returns; a coil spring for biasing the slider to return; a gear train for speeding up the rotations of the pivot pin; a brake connected to the gear train; and a one-way transmission clutch for operating the brake in a direction to close the door.