1. A hydraulic machine, in particular hydraulic pressure exchanger, comprising a drum rotatable about an axis, a front plate arrangement having a front plate and a pressure shoe, said drum comprising a plurality of working cylinders, each working cylinder having a front opening, during rotation of said drum, said front opening sliding over said pressure shoe along a path, said pressure shoe having at least two kidney-shaped openings, said kidney-shaped openings being arranged in said path, wherein said pressure shoe is arranged between said drum and said front plate and comprises at least a pressure cylinder arranged between two neighboring kidney-shaped openings, a piston being arranged in that pressure cylinder, said piston resting against said front plate, said pressure cylinder being connected with a supply opening in a side of the pressure shoe opposite said front plate, said opening at least partly overlapping said path.
2. The hydraulic machine according to claim 1, wherein at least two pressure cylinders are arranged between two neighboring kidney-shaped openings one behind the other in a direction of movement of said working cylinders.
3. The hydraulic machine according to claim 2, wherein said supply opening is arranged eccentrically relative to a center of said pressure cylinder.
4. The hydraulic machine according to claim 3, wherein the center of said pressure cylinder is arranged closer to the axis than said supply opening.
5. The hydraulic machine according to claim 1, wherein said pressure cylinder overlaps at least partially said path.
6. The hydraulic machine according to claim 1, wherein the pressure shoe comprises a first port and at least a pressing cylinder, said pressing cylinder opening to said front plate, a pressing piston being arranged in said pressing cylinder, said pressing cylinder being in fluid contact with said first port.
7. The hydraulic machine according to claim 1, wherein at least two pressing cylinders are arranged in said pressure shoe.
8. The hydraulic machine according to claim 7, wherein said pressing cylinders have the same cross section area.
9. The hydraulic machine according to claim 6, wherein said pressure shoe comprises two ports on a side facing said first front plate, said ports having a minimum distance along a straight line, said pressing cylinder being offset to said straight line by a predetermined displacement.
10. The hydraulic machine according to claim 9, wherein said pressing cylinder is arranged between said ports.
11. The hydraulic machine according to claim 2, wherein said pressure cylinder overlaps at least partially said path.
12. The hydraulic machine according to claim 3, wherein said pressure cylinder overlaps at least partially said path.
13. The hydraulic machine according to claim 4, wherein said pressure cylinder overlaps at least partially said path.
14. The hydraulic machine according to claim 2, wherein the pressure shoe comprises a first port and at least a pressing cylinder, said pressing cylinder opening to said front plate, a pressing piston being arranged in said pressing cylinder, said pressing cylinder being in fluid contact with said first port.
15. The hydraulic machine according to claim 3, wherein the pressure shoe comprises a first port and at least a pressing cylinder, said pressing cylinder opening to said front plate, a pressing piston being arranged in said pressing cylinder, said pressing cylinder being in fluid contact with said first port.
16. The hydraulic machine according to claim 4, wherein the pressure shoe comprises a first port and at least a pressing cylinder, said pressing cylinder opening to said front plate, a pressing piston being arranged in said pressing cylinder, said pressing cylinder being in fluid contact with said first port.
17. The hydraulic machine according to claim 5, wherein the pressure shoe comprises a first port and at least a pressing cylinder, said pressing cylinder opening to said front plate, a pressing piston being arranged in said pressing cylinder, said pressing cylinder being in fluid contact with said first port.
18. The hydraulic machine according to claim 2, wherein at least two pressing cylinders are arranged in said pressure shoe.
19. The hydraulic machine according to claim 3, wherein at least two pressing cylinders are arranged in said pressure shoe.
20. The hydraulic machine according to claim 4, wherein at least two pressing cylinders are arranged in said pressure shoe.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A thermal cycling device comprising:
a sample block for holding a sample well tray;
a plate adjacent to the sample block;
a plurality of springs positioned under the plate; and
a cover that provides a downward force on the sample well tray a closed position;
wherein the plate provides an ejecting force on the sample well tray.
2. The thermal cycling device of claim 1, wherein the springs are helical springs.
3. The thermal cycling device of claim 1, wherein the springs are leaf springs.
4. The thermal cycling device of claim 1, wherein the plate surrounds the outer periphery of the sample block.
5. The thermal cycling device of claim 1, wherein the sample lock provides a plurality of openings for receiving the sample wells.
6. The thermal cycling device of claim 1, wherein plate abuts the bottom surface of the sample well tray.
7. A thermal cycling device comprising:
a sample block for holding a sample well tray;
a plate adjacent to the sample block; and
a plurality of springs positioned under the plate;
wherein the sample well tray sticks inside the sample block; and
wherein the plate provides an ejecting force on the sample well tray.
8. The thermal cycling device of claim 7, wherein the sample we the tray sticks due to thermal expansion.
9. The thermal cycling device of claim 8, further comprising a cover that provides a downward force on the sample well tray in a closed position, wherein the sample well tray sticks due to the force provided by the cover.
10. A thermal cycling device comprising:
a sample block for holding a sample well tray;
an ejection plate;
a plurality of springs positioned under the ejection plate; and
wherein the ejection plate provides a force on the sample well tray wherein the force is adapted to remove the sample well tray with a robotic system.
11. The thermal cycling device of claim 10, wherein the springs are helical springs.
12. The thermal cycling device of claim 10, wherein the springs are leaf springs.
13. The thermal cycling device of claim 10, wherein the ejection plate surrounds the outer periphery of the sample block.
14. The thermal cycling device of claim 10, wherein the sample block provides a plurality of openings for receiving the sample wells.
15. The thermal cycling device of claim 10, wherein ejection plate abuts the bottom surface of the sample well tray.
16. A method for thermal cycling comprising:
positioning in a sample block a sample well tray;
closing a cover to provide a downward force on the sample well tray;
thermally cycling the sample well tray;
opening the cover to remove the downward force on the sample well tray;
ejecting the sample well tray from the sample block with a plate positioned under the sample well tray, wherein a plurality of springs positioned below the plate provide the ejecting;
removing the sample well tray from the sample block.
17. The method for thermal cycling of claim 10, wherein the posit positioning comprises inserting the sample well tray into a plurality of openings in the sample block.