Hydraulically operated shifter for power take-off
AssigneeParker-Hannifin Corporation
InventorDamon B. Graves
Life of this patent
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Abstract
A hydraulically operated shifter for use in a power take-off includes a shifter housing having an interior, a fluid port, and an opening. A shifter piston is disposed within the interior of the shifter housing and is movable in first and second directions. The shifter piston defines first and second chambers within the interior of the shifter housing. The fluid port communicates with the first chamber, and the opening communicates with the second chamber. The shifter piston includes a passageway that provides communication between the first and second chamber defined within the interior of the shifter housing. A shift actuator is supported on the shifter piston for movement therewith and extends through the opening provided in the shifter housing.
Claims19
A shifter that is adapted for use with a clutch comprising:
- a shifter housing including an interior, a fluid port, and an opening;
- a shifter piston disposed within the interior of the shifter housing and axially movable in first and second directions, the shifter piston defining first and second chambers within the interior of the shifter housing, the fluid port communicating with the first chamber and the opening communicating with the second chamber, the shifter piston including an axially-extending orifice that provides constant fluid communication between the first and second chambers defined within the interior of the shifter housing;
- and
- a shift actuator that is supported on the shifter piston for movement therewith and extends through the opening provided in the shifter housing, the shift actuator being adapted for use with a clutch.
A power take-off assembly comprising:
- a power take-off having an input gear, an output shaft, and a clutch for selectively connecting the output shaft for rotation by the input gear;
- and
- a shifter for operating the clutch, the shifter including:
- a shifter housing including an interior, a fluid port, and an opening;
- a shifter piston disposed within the interior of the shifter housing and axially movable in first and second directions, the shifter piston defining first and second chambers within the interior of the shifter housing, the fluid port communicating with the first chamber and the opening communicating with the second chamber, the shifter piston including an axially-extending orifice that provides constant fluid communication between the first and second chambers defined within the interior of the shifter housing;
- and
- a shift actuator that is supported on the shifter piston for movement therewith and extends through the opening provided in the shifter housing, the shift actuator being connected for operating the clutch.
A shifter that is adapted for use with a clutch comprising:
- a shifter housing including an interior, a fluid port, and an opening;
- a shifter piston disposed within the interior of the shifter housing and movable in first and second directions, the shifter piston defining first and second chambers within the interior of the shifter housing, the first and second chambers defining respective volumes that vary with movement of the shifter piston within the interior of the shifter housing, the fluid port communicating with the first chamber and the opening communicating with the second chamber, the shifter piston including an orifice that provides constant fluid communication between the first and second chambers defined within the interior of the shifter housing;
- and
- a shift actuator that is supported on the shifter piston for movement therewith and extends through the opening provided in the shifter housing, the shift actuator being adapted for use with a clutch.
Dependencies are inferred from the claim text.