Wave spring loaded split seal system
AssigneeHelix Technology Corporation
InventorRussell M. Sylvia
Life of this patent
Estimating the term…
Abstract
A piston includes a circumferential groove having a seal ring and spring mounted within the groove. The spring exerts an axial force on the seal ring thereby preventing motion of the seal ring within the groove. Preferably, the spring in a wave spring, wherein small changes in deflection of the wave spring produces small changes in the load generated by the spring on the seal ring. The seal ring has at least one radial spring ring mounted within the seal ring to create a radial force on the seal ring. The piston can also include a sleeve that mounts to the piston body, the sleeve forming a wall of the groove. The piston can be a displacer mounted within a cylinder of a refrigerator.
Claims41
A piston comprising:
- a body having a circumferential groove;
- a first seal ring located within the circumferential groove;
- and
- a wave spring located within the circumferential groove.
A refrigerator comprising:
- a cylinder;
- a displacer mounted within the cylinder, the displacer having a body having a circumferential groove;
- a first seal ring located within the circumferential groove;
- and
- a wave spring located within the circumferential groove.
A method for securing a seal ring within a piston comprising:
- providing a piston having a body having a circumferential groove and a sleeve mounted on the body;
- providing a first seal ring within the circumferential groove of the piston;
- providing a wave spring within the circumferential groove;
- compressing the wave spring with the sleeve to axially load the first seal ring;
- and
- attaching the sleeve to the body to maintain the compression of the wave spring.
A piston comprising:
- a body having a circumferential groove, the circumferential groove having a first groove wall and a second groove wall;
- a first seal ring located against the first groove wall in the body;
- a second seal ring located against the second groove wall;
- and
- a wave spring located between the first and second seal rings.
A refrigerator comprising:
- a cylinder;
- a displacer mounted within the cylinder, the displacer having a body having a circumferential groove, the groove having a first groove wall and a second groove wall;
- a first seal ring located against the first groove wall in the body;
- a second seal ring located against the second groove wall;
- and
- a wave spring located between the first and second seal rings.
A piston comprising:
- a body having a circumferential groove, the circumferential groove having a first groove wall and a second groove wall;
- a first seal ring located against the first groove wall in the body;
- a first static seal ring located against the first seal ring;
- and
- a wave spring located between the static seal ring and the second groove wall, the wave spring axially loading the first seal ring.
A refrigerator comprising:
- a cylinder;
- a displacer mounted within the cylinder, the displacer having a body having a circumferential groove, the groove having a first groove wall and a second groove wall;
- a first seal ring located against the first groove wall in the body;
- a static seal ring located against the first seal ring;
- and
- a wave spring located between the static seal ring and the second groove wall, the wave spring axially loading the first seal ring.
Dependencies are inferred from the claim text.