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US 10,385,880 B2Granted
Motor soft shift feature
AssigneeDanfoss Power Solutions Inc.
InventorStephen Frantz
Life of this patent
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AssigneeDanfoss Power Solutions Inc.
InventorStephen Frantz
Estimating the term…
A hydraulic unit includes a driving mechanism whose displacement volume is adjustable to two operational states by means of a position-able adjustment element. The adjustment element can be positioned by a servo piston of a servo unit into a first, initial position and a second, operative position. A first front face and a second front face of the servo piston, which are opposing each other, can be pressurized individually with pressurized hydraulic fluid in order to position the servo piston at either end position of a servo cylinder of the servo unit. The servo piston is of a stepped design thereby forming a ring-shaped damping surface opposing the first front face. In the servo cylinder a ring-shaped shoulder surface is formed opposing the damping surface such that a damping volume is formed in the servo cylinder by the damping surface, the shoulder surface and the servo cylinder.
A hydraulic unit (1) having a driving mechanism (2) whose displacement volume is adjustable to two operational states through movement of a positionable adjustment element (3) which itself can be positioned through movement of a servo piston (6) of a servo unit (4) into a first, initial position and a second, operated position, wherein a first front face (7) of the servo piston (6) opposes a second front face (8) of the servo piston (6), wherein the first front face (7) can be pressurized with pressurized hydraulic fluid for positioning the servo piston (6) at one end of a servo cylinder (5) of the servo unit (4),
A hydraulic unit (1) having a driving mechanism (2) with an adjustment element (3) for adjusting displacement volume, the hydraulic unit comprising:
Dependencies are inferred from the claim text.