Pump unit

Power plants – Pressure fluid source and motor – Having distinct cooling or lubricating structure

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C060S484000, C060S486000

Reexamination Certificate

active

07028472

ABSTRACT:
The present invention provides a pump unit including at least one hydraulic pump with inlet and outlet ports, a pump case for accommodating the hydraulic pump having an opening through which the hydraulic pump is insertable, and a lid, called a center section, closing the pump case. The center section forms a pair of inlet/outlet passages communicating an end with the inlet and outlet ports of the hydraulic pump and an end opening through a pump case abutting surface of the center section, and a first charging passage by which hydraulic fluid is fed through the pump case abutting surface of the center section. At least one of the pump case and the center section communicates the first charging passage with the pair of inlet/outlet passages via a first hydraulic fluid feeding valve preventing the reverse flow into said first charging passage.

REFERENCES:
patent: 4920733 (1990-05-01), Berrios
patent: 4934252 (1990-06-01), Giere
patent: 4955249 (1990-09-01), Wetor
patent: 5069037 (1991-12-01), Sakigawa et al.
patent: 5094077 (1992-03-01), Okada
patent: 5622051 (1997-04-01), Iida et al.
patent: 5957229 (1999-09-01), Ishii
patent: 6122996 (2000-09-01), Hauser et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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

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

Rate now

     

Profile ID: LFUS-PAI-O-3556289

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.