CPC F04B 1/143 (2013.01) [F04B 1/124 (2013.01); F04B 1/295 (2013.01); F04B 53/162 (2013.01)] | 16 Claims |
1. A piston assembly, comprising:
a cylinder extending along an axis and having an open axial end,
a cap assembly closing the cylinder at its open axial end, the cap assembly comprising an insertion portion received in the cylinder at its open axial end, and
a piston axially movably disposed within the cylinder and partially received in the insertion portion of the cap assembly;
a first biasing member for biasing the piston in a first direction along the axis, and
an axially displaceable zeroing member limiting axial movement of the first biasing member; and
a worm screw or leadscrew engaged with the zeroing member so that the zeroing member is displaceable along the axis by rotating the worm screw.
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16. A piston assembly, comprising:
a cylinder extending along an axis and having an open axial end,
a cap assembly closing the cylinder at its open axial end, the cap assembly comprising an insertion portion received in the cylinder at its open axial end, and
a piston axially movably disposed within the cylinder and partially received in the insertion portion of the cap assembly;
a first biasing member for biasing the piston in a first direction along the axis, and an axially displaceable zeroing member limiting axial movement of the first biasing member; and
a rotatable gudgeon including an eccentric pin engaged with the zeroing member so that the zeroing member is displaceable along the axis by rotating the rotatable gudgeon.
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