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. 25, 2016
Filed:
Apr. 11, 2013
Kobelco Construction Machinery Co., Ltd., Hiroshima, JP;
Kobe Steel, Ltd., Hyogo, JP;
Masatsugu Hamasaki, Hiroshima, JP;
Koji Yamashita, Hiroshima, JP;
Masashi Kawabata, Hyogo, JP;
Shoji Yoichi, Gifu, JP;
Ryo Uchiyama, Gifu, JP;
KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima, JP;
Kobe Steel, Ltd., Hyogo, JP;
Abstract
A drive device for a construction machine, which includes a speed reducer and a brake mechanism, wherein the speed reducer has a casing in which lubricating oil and the brake mechanism are provided, and wherein the brake mechanism includes: a ring-shaped brake piston; and a brake plate configured to generate a braking force by a pressing force of the brake piston, and wherein the brake piston has: a plurality of oil pockets provided in the brake piston at respective positions along a circumferential direction of the brake piston, each of the oil pockets formed as a space capable of storing lubricating oil; oil inlets allowing lubricating oil rising during operation of the drive device to be introduced into the oil pockets respectively; and oil outlets allowing lubricating oil stored in the respective oil pockets to be discharged.