Work machine

Details Work machine Work machine

2006-02-27

2009-10-06

Pezzuto, Robert E (Department: 3671)

Excavating

Ditcher

Condition responsive

C060S421000

Reexamination Certificate

active

07596893

ABSTRACT:
A work machine enabling a hybrid drive system to be directly driven by energy contained in a return fluid discharged from a hydraulic actuator. The work machine includes a hydraulic actuator control circuit and a swing control circuit. The hydraulic actuator control circuit serves to control hydraulic fluid supplied from pumps of a hybrid drive system to travel motors and work actuators. The swing control circuit serves to control a swing motor generator, which functions as an electric motor and, during braking of rotating motion of the upper structure, functions as a generator. The hydraulic actuator control circuit includes an energy recovery motor provided in a return passage, though which return fluid recovered from a work actuator flows. The energy recovery motor is adapted to be driven by return fluid and thereby drive a motor generator of the hybrid drive system.

REFERENCES:
patent: 4898078 (1990-02-01), Gage et al.
patent: 6079933 (2000-06-01), Moyna et al.
patent: 6321535 (2001-11-01), Ikari et al.
patent: 6658843 (2003-12-01), Kauss
patent: 7251934 (2007-08-01), Lech et al.
patent: 09-079212 (1997-03-01), None
patent: 2000-046165 (2000-02-01), None
patent: 2001-207482 (2001-08-01), None
patent: 2001-304001 (2001-10-01), None
patent: 2004-190845 (2004-07-01), None

Affiliated with

Also associated with

Rating

Work machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Work machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Work machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4110476