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. 28, 2000
Filed:
Dec. 31, 1998
Applicant:
Inventor:
Thomas Salutzki, Witten, DE;
Assignee:
Dorma GmbH + Co. KG, Ennepetal, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05F / ;
U.S. Cl.
CPC ...
16 62 ; 16 49 ; 16 58 ; 16 79 ; 16DI / ; 16DI / ;
Abstract
A door closer with a door piston, which door piston is acted on by a driven shaft during the opening of a door. The door piston has an extension attached to it. The door closer also can have a pressure piston and an energy storage mechanism which acts on the pressure piston. The pistons can be axially guided and can interact with hydraulically connected pressure chambers to connect and disconnect the pistons during the opening and closing of the door closer.
Salutzki, Thomas. (2000). Door closer to generate a sudden change in the transmission ratio during (U.S. Patent No. 6151753). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6151753
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile