Hydrostatic continuously variable transmission

Details Hydrostatic continuously variable transmission Hydrostatic continuously variable transmission

2007-05-29

2007-05-29

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

Having distinct cooling or lubricating structure

C060S487000

Reexamination Certificate

active

11376757

ABSTRACT:
A hydrostatic continuously variable transmission comprises: a hydraulic pump; a power input shaft engaged with the hydraulic pump to transmit power from a power source to the hydraulic pump; a hydraulic motor in hydraulic communication with the hydraulic pump; a casing that houses the hydraulic pump and the hydraulic motor; a port block mounted to the casing, the port block having a block main body and a cover member connected to a power input side of the block main body, said cover member having an outer surface; a cooling hydraulic path provided in the port block in a region where the block main body and the cover member meet, the cooling hydraulic path being connected to a first hydraulic path in the port block, the cooling hydraulic path having a plurality of bends; a cooling fan provided on the power input shaft to provide air flow directly to the outer surface of the cover member.

REFERENCES:
patent: 4627237 (1986-12-01), Hutson
patent: 6073443 (2000-06-01), Okada et al.
patent: 6237332 (2001-05-01), Thoma et al.
patent: 2006/0013705 (2006-01-01), Sakikawa
patent: 8-145168 (1996-04-01), None

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