Oil-hydraulic vehicle

Details Oil-hydraulic vehicle Oil-hydraulic vehicle

2006-05-23

2006-05-23

Look, Edward K. (Department: 3745)

Power plants

Pressure fluid source and motor

Valve means reverses flow from pump to reversible rotary motor

Reexamination Certificate

active

07047737

ABSTRACT:
An oil-hydraulic vehicle comprising (i) at least one oil-hydraulic pump10driven by an engine E, an input shaft of said oil-hydraulic pump being directly coupled with a crankshaft C of the engine, (ii) at least one oil-hydraulic motor30to drive at least one wheel31in both forward and backward directions, (iii) an oil-hydraulic circuit50to connect said oil-hydraulic pump10and said oil-hydraulic motor30, and (iv) at least one flow control valve60provided between said at least one oil-hydraulic pump10and said at least one oil-hydraulic motor30. Said at least one flow control valve60has (i) a first changeover position where the valve60returns the oil, which is fed from said oil-hydraulic pump10to the valve60, to said oil-hydraulic pump10, (ii) a second changeover position where the valve60feeds the oil, which is fed from said oil-hydraulic pump10to the valve60, to an inlet of said oil-hydraulic motor30, and (iii) a third changeover position where the valve60feeds the oil, which is fed from said oil-hydraulic pump10to the valve60, to an outlet of said oil-hydraulic motor30.

REFERENCES:
patent: 433184 (1890-07-01), Pickles
patent: 2184219 (1939-12-01), Johnson
patent: 2379938 (1945-07-01), Swanson
patent: S11-12521 (1936-09-01), None
patent: S13-7363 (1940-07-01), None
patent: S18-11415 (1943-10-01), None
patent: S46-250 (1971-01-01), None
patent: 48-25242 (1973-07-01), None
patent: S56-7147 (1979-06-01), None
patent: 54-69677 (1979-06-01), None
patent: 05-346101 (1993-12-01), None
patent: 2000-095134 (2000-04-01), None
JPO Office Action mailed on Feb. 25, 2003.
International Search Report for PCT/JP01/00279 mailed Apr. 17, 2001.
PCT/IPEA/408 Determination if International Perliminary Examination is Required mailed on Jun. 11, 2002.
PCT/IPEA/409 International Preliminary Examination Report completed on Nov. 1, 2002.

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