Piston for reciprocating compressor having complementary sealing elements
AssigneeFaiveley Transport Italia S.P.A.
InventorCorrado Rossino
Life of this patent
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Abstract
A piston is described for the compression of a pneumatic fluid in a compression chamber of a cylinder comprising: a cylindrically shaped piston body, adapted to be arranged slidably within said cylinder, and having a side wall and a top wall; along a circumferential perimeter of said side wall of the piston body a seat being defined; and a sealing assembly accommodated in said seat, and adapted to ensure the fluid-tightness along said circumferential perimeter; the sealing assembly comprising a plurality of sealing elements, having shapes complementary to one another, and configured so that the wear of a sealing element along said circumferential perimeter corresponds to a sliding in the radially outer direction of the adjacent sealing element.
Claims19
A piston for the compression of a pneumatic fluid in a compression chamber of a cylinder comprising:
- a cylindrically shaped piston body, adapted to be arranged slidably within said cylinder, and having a side wall and a top wall;
- along a circumferential perimeter of said side wall of the piston cylindrically shaped body a seat being defined;
- and
- a sealing assembly accommodated in said seat, and adapted to ensure the fluid-tightness along said circumferential perimeter;
- the sealing assembly comprising a plurality of sealing elements, having shapes complementary to one another, and configured so that the wear of a sealing element along said circumferential perimeter corresponds to a sliding in a radially outer direction of an adjacent sealing element, wherein said seat is shaped so that a cross section of the piston body at said seat along a transverse plane has a substantially cross shape or a substantially rectangular shape, with beveled corners.
A piston for the compression of a pneumatic fluid in a compression chamber of a cylinder comprising:
- a cylindrically shaped piston body, adapted to be arranged slidably within said cylinder, and having a side wall and a top wall;
- along a circumferential perimeter of said side wall of the piston cylindrically shaped body a seat being defined;
- and
- a sealing assembly accommodated in said seat, and adapted to ensure the fluid-tightness along said circumferential perimeter;
- the sealing assembly comprising a plurality of sealing elements, having shapes complementary to one another, and configured so that the wear of a sealing element along said circumferential perimeter corresponds to a sliding in a radially outer direction of an adjacent sealing element, wherein at least one sealing element has a through check hole, arranged in such a way that, at a certain level of wear of said sealing element, said check hole is arranged to make sure the fluid-tightness along the circumferential perimeter of the side wall of the piston body is no longer ensured.
Dependencies are inferred from the claim text.