Cam motor apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 18, 2000
Grant Date -
N/A
app pub date -
Jun 25, 1998
filing date -
Nov 1, 1996
priority date (Note) -
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Abstract
A cam motor apparatus A is configured such that a cylinder block (2) rotating together with an output shaft (10) is internally provided with a plurality of cylinders (5, 5, . . . ) formed radially in a direction orthogonal to a rotational axis (X) of the cylinder block (2) and pistons (6) respectively housed in the cylinders are reciprocated by the action of working oil distributed thereto by a distribution valve (7) thereby rotating the output shaft. The cam motor apparatus A further includes a selector valve (9) for selectively communicating each of the cylinders with a supply passage (81) or a discharge passage (82) for working oil through the distribution valve. When the selector valve is in a low rotational speed position, working oil is supplied to and discharged from all the cylinders. On the other hand, when the selector valve is changed into a high rotational speed position, working oil is supplied to and discharged from a half of the cylinders and pressurized oil is supplied from a charging pump (16) to the remaining cylinders.
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