| CPC F04B 53/14 (2013.01) [F01B 3/007 (2013.01); F04B 19/22 (2013.01)] | 18 Claims |

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1. A zeroing device, comprising:
a piston movable along an axis,
at least one biasing member for biasing the piston along the axis,
an axially displaceable zeroing member limiting axial movement of the at least one biasing member;
a housing, wherein the piston is received in a cylinder formed within the housing and wherein the piston is movable relative to the housing; and
a cap assembly closing the cylinder formed in the housing at an axial end thereof, the cap assembly comprising an insertion portion received in the cylinder, wherein the piston is partially received in the insertion portion of the cap assembly.
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