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:
Jan. 29, 2013
Filed:
Aug. 31, 2007
Applicant:
Hiroshi Kigawa, Tokyo, JP;
Inventor:
Hiroshi Kigawa, Tokyo, JP;
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66B 5/28 (2006.01); B60G 11/56 (2006.01); F16F 9/48 (2006.01);
U.S. Cl.
CPC ...
Abstract
In an oil buffer for an elevator, at least one cylindrical intermediate plunger is inserted into a base cylinder. An upper-stage plunger is inserted into the intermediate plunger. An orifice is provided in a bottom surface portion of the upper-stage plunger. A pin rod is provided upright in the base cylinder. The pin rod is inserted into the orifice in a middle of a stroke of the upper-stage plunger. A return spring causes the intermediate plunger and the upper-stage plunger to return to positions in an unloaded state.