Multiple pump unit

Details Multiple pump unit Multiple pump unit

2011-03-15

2011-03-15

Kramer, Devon C (Department: 3746)

Pumps

Three or more cylinders arranged in parallel, radial, or...

C091S499000, C060S464000, C060S488000

Reexamination Certificate

active

07905711

ABSTRACT:
There is provided a multiple pump unit including a pump shaft, a first pump, a pump housing, a second pump and a fluid passage block connected to one end surface in an axis line direction of the pump housing. One or both contacting surfaces of the pump housing and the fluid passage block is formed with a concave portion for accommodating the second pump. The pump housing is provided with a suction fluid passage guiding hydraulic fluid to a suction opening of the first pump and a first pump discharge fluid passage having a distal end that forms a first pump discharge port. The fluid passage block is provided with a second pump discharge port having the second pump as a hydraulic source.

REFERENCES:
patent: 2769393 (1956-11-01), Cardillo et al.
patent: 3066609 (1962-12-01), Hann
patent: 5311740 (1994-05-01), Shiba et al.
patent: 5354180 (1994-10-01), Forster
patent: 5782161 (1998-07-01), Okubo et al.
patent: 6332393 (2001-12-01), Trimble
patent: 2005/0053478 (2005-03-01), Sakikawa et al.
patent: 2005/0226747 (2005-10-01), Ohashi et al.
patent: 3781899 (2006-03-01), None
patent: 3781899 (2006-05-01), None

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