Hydraulic motor with radial pistons and control by cylinder
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United States of America Patent
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Jul 7, 2015
Grant Date -
Feb 9, 2012
app pub date -
Dec 30, 2009
filing date -
Dec 31, 2008
priority date (Note) -
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Abstract
A hydraulic motor is provided having radial pistons, with a cylinder block, two main ducts, a fluid distributor, one distribution valve per cylinder, and a control system for controlling the distribution valves. The motor includes at least two elementary motors, and can operate in various different states in which, in each elementary motor, each of the cylinders is connected on the rising ramps to a second main duct and on the falling ramps to a second main duct; a first elementary motor being driving in a first state, and inactive or opposing in a second state, the control system operating the remainder of the hydraulic motor in the same way in these two states. A hydraulic circuit including said motor and a method of controlling such a motor are also provided.
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