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:
Apr. 30, 2002
Filed:
Jun. 13, 2001
Komatsu Ltd., Tokyo, JP;
Abstract
Energy of returning pressurized fluid of an actuator is recovered and reused as energy for operating other accumulators. A first pump motor ( ) and a second pump motor ( ) are mechanically connected to form a pressure converter ( ), and a first circuit ( ), to which the returning pressurized fluid is supplied, is connected to the first pump motor ( ). A pressure accumulator ( ) is provided to a second circuit ( ) connected to the second pump motor ( ). The first circuit ( ) is connected to a discharge passage ( ) of a primary hydraulic pump ( ) by a third circuit ( ) and the pressure of a high pressure pressurized fluid is supplied to the discharge passage ( ) by the pressure of the high pressure pressurized fluid, and is reused.