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:
Aug. 16, 2016
Filed:
Nov. 05, 2013
Ryobi Ltd., Hiroshima, JP;
Tomohiro Nakamae, Hiroshima, JP;
RYOBI LTD., Hiroshima, JP;
Abstract
Disclosed is a door closer that can easily adjust the spring force of a return spring. A pistonmoves toward a first oil chamberupon a door opening operation and moves toward a second oil chamberupon a door closing operation. A return springis located on the same line as the piston. The return springis interposed between a spring retaining seat on a fixed side close to a main shaftand a spring retaining seat on a moving side distant from the main shaft. The return springis compressed by the spring retaining seat on the moving side moving closer to the spring retaining seat on the fixed side upon the door opening operation and then stores the closing force. The door closer includes a spring force adjustment mechanism configured to change the position of a spring retaining member, which has the spring retaining seat on the fixed side, in the axial direction of the pistonwith respect to the main body housing, and configured to adjust the spring force of the return springby changing the position of the spring retaining memberthrough an operation from the outside of the main body housing