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US 2012/0222546 A1Published application
Variable displacement piston-in-piston hydraulic unit
AssigneeTony Cannata
InventorAntonio CANNATA
Life of this patent
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Abstract
A piston-in-piston hydraulic unit is disclosed that utilises an elastic volume to store and release energy with each stroke by varying the hydraulic fluid volumes in and out of the hydraulic unit.
Claims20
A piston unit comprising:
- a main block having a primary piston bore located there-through and having an axis extending lengthwise through the primary piston bore;
- a primary piston comprising a secondary piston bore in a portion thereof, the primary piston operable to reciprocate within the primary piston bore along the axis;
- a secondary piston configured to be received within the secondary piston bore, and operable to reciprocate therein along the axis of the channel, the secondary piston defining a gas cavity between a bottom surface of the secondary piston and the opposing and adjacent surfaces of the secondary piston bore;
- the primary piston and the secondary piston operable to reciprocate along the axis relative to each other such that the primary piston is movable within the primary piston bore and the secondary piston is moveable within the secondary piston bore contrary to the movement of the primary piston;
- and
- a head for encasing the primary piston and the secondary piston within the main block, thereby providing a fluid cavity positioned between a top surface of the secondary piston and the head.
3 more elements
A piston unit comprising:
- a main block having a secondary piston bore located there-through and having an axis extending lengthwise through the secondary piston bore;
- a secondary piston comprising a primary piston bore in a portion thereof, the secondary piston operable to reciprocate within the secondary piston bore along the axis;
- a primary piston configured to be received within the primary piston bore, and operable to reciprocate therein along the axis of the channel, the primary piston defining a gas cavity between a top surface of the primary piston and the opposing and adjacent surfaces of the primary piston bore;
- the primary piston and the secondary piston operable to reciprocate along the axis relative to each other such that the primary piston is movable within the primary piston bore and the secondary piston is moveable within the secondary piston bore contrary to the movement of the primary piston;
- and
- a head for encasing the primary piston and the secondary piston within the main block, thereby providing a fluid cavity positioned between a top surface of the secondary piston and the head.
3 more elements
A piston unit comprising:
- a main block having a main bore located there-through and having an axis extending lengthwise through the main bore;
- a piston sub-assembly configured to be received within the main bore and operable to reciprocate therein along the axis of the main bore, the piston sub-assembly comprising
- a first piston comprising a piston bore in a portion thereof, and
- a second piston operable to reciprocate within the piston bore along the axis of the main bore, the first piston and second piston defining a gas cavity therebetween and being operable to reciprocate along the axis relative to each other such that the first piston is movable within the piston bore contrary to the movement of the second piston;
- and
- a head for encasing the piston sub-assembly within the main block, thereby providing a fluid cavity positioned between a top surface of the sub-assembly and the head.
3 more elements
Dependencies are inferred from the claim text.