Dual balance shaft pump assembly

Details Dual balance shaft pump assembly Dual balance shaft pump assembly

2006-05-02

2006-05-02

Freay, Charles G. (Department: 3746)

Pumps

Motor driven

Internal-combustion engine

C123S1960CP, C123S192200

Reexamination Certificate

active

07037088

ABSTRACT:
A dual fluid pump assembly driven by respective shafts of a dual balancing shaft assembly for an engine of an automotive vehicle. A shaft housing rotatably supports primary and secondary balancing shafts of the dual balancing shaft assembly. The shafts are coupled by a gear train for rotating the primary and secondary balance shafts in opposite directions. Each shaft includes a distal end for supporting and driving a fluid pump. A pump housing is fixedly secured to the shaft housing for enclosing the fluid pump and retaining fluid therebetween. The pumps are disposed adjacent the shaft housing and within a seal formed by the shaft housing and pump housing.

REFERENCES:
patent: 5535643 (1996-07-01), Garza
patent: 5791309 (1998-08-01), Yamazaki et al.
patent: 5918573 (1999-07-01), Killion
patent: 6189499 (2001-02-01), Iwata et al.
patent: 6205970 (2001-03-01), Iwata et al.
patent: 6371071 (2002-04-01), Iwata
patent: 6601557 (2003-08-01), Hayman et al.
patent: 1319809 (2003-06-01), None
patent: 2001-99233 (2001-04-01), None
patent: WO 00/15976 (2000-03-01), None

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