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:
Sep. 18, 2007
Filed:
Sep. 30, 2005
Jiao Zhang, Naperville, IL (US);
Pengfei MA, Naperville, IL (US);
Michael Schwab, Crest Hill, IL (US);
Kalpesh N. Patel, Romeoville, IL (US);
Tonglin Shang, Bolingbrook, IL (US);
Jiao Zhang, Naperville, IL (US);
Pengfei Ma, Naperville, IL (US);
Michael Schwab, Crest Hill, IL (US);
Kalpesh N. Patel, Romeoville, IL (US);
Tonglin Shang, Bolingbrook, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A hydraulic system may include a hydraulic actuator. The hydraulic system may also include a pump having a pump inlet and a pump outlet, and the pump may be configured to supply fluid to the hydraulic actuator. The hydraulic system may further include an energy recovery system operatively connected between the hydraulic actuator and the pump. The energy recovery system may be configured to store fluid from the hydraulic actuator under an overrunning load condition, and the stored fluid may be directed through the pump inlet and into the hydraulic actuator.