Hyrdaulic transmission

Details Hyrdaulic transmission Hyrdaulic transmission

2011-07-05

2011-07-05

Lopez, F. Daniel (Department: 3745)

Power plants

Pressure fluid source and motor

Condition responsive control of motive fluid flow

C060S468000, C060S489000

Reexamination Certificate

active

07971435

ABSTRACT:
A hydraulic transmission comprises a hydraulic pump and a hydraulic motor, which are mounted onto a center section to be fluidly connected to each other through a closed fluid circuit formed in the center section. A neutral valve is connected to the closed fluid circuit. The neutral valve is fitted into an outward opened end of a vertical slanted oil hole of the closed fluid circuit. Alternatively, the neutral valve is fitted into an outward opened end of a straight oil hole having an opposite outward opened end into which a charge check valve is fitted.

REFERENCES:
patent: 3704588 (1972-12-01), Trabbic
patent: 4986073 (1991-01-01), Okada
patent: 5136845 (1992-08-01), Woodley
patent: 5356347 (1994-10-01), Komura et al.
patent: 5546752 (1996-08-01), Horton et al.
patent: 5836159 (1998-11-01), Shimizu et al.
patent: 6508059 (2003-01-01), Takada et al.
patent: 6966181 (2005-11-01), Ohashi et al.

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