Pump seal
AssigneeChart Inc.
InventorEric Thor
Life of this patent
Estimating the term…
Abstract
An annular seal for sealing an opening in a pump housing surrounding a piston rod includes a primary sealing portion with an inner surface adjacent to the piston rod and an outer surface adjacent to the pump housing. An initial sealing portion features an inner wall and an outer wall so that an annular space is defined therebetween. A top wall extends between the inner and outer walls. A coil spring is positioned within the annular space of the initial sealing portion and urges the inner wall into engagement with the piston rod and the outer wall into engagement with the pump housing.
Claims20
An annular seal for sealing an opening in a pump housing surrounding a piston rod comprising:
- a primary sealing portion with an inner surface adjacent the piston rod and an outer surface adjacent the pump housing;
- an initial sealing portion featuring an inner wall and an outer wall so that an annular space is defined therebetween and a top wall extending between the inner and outer walls;
- wherein the primary sealing portion and the initial sealing portion are integrally formed together;
- and
- a coil spring positioned within the annular space of the initial sealing portion and configured so as to urge the inner wall into engagement with the piston rod and the outer wall into engagement with the pump housing.
An annular seal for sealing an opening in a pump housing surrounding a piston rod comprising:
- a primary sealing portion with an inner surface adjacent the piston rod and an outer surface adjacent the pump housing;
- an initial sealing portion featuring an inner wall and an outer wall so that an annular space is defined therebetween;
- wherein the primary sealing portion and the initial sealing portion are integrally formed together;
- and
- an O-ring positioned within the annular space of the initial sealing portion and configured so as to urge the inner wall into engagement with the piston rod and the outer wall into engagement with the pump housing.
A pump for a cryogenic system comprising:
- a piston rod;
- a pump housing;
- a retaining nut;
- a cylinder;
- an annular seal, wherein the annular seal comprises:
- a primary sealing portion with an inner surface adjacent the piston rod and an outer surface adjacent the pump housing;
- an initial sealing portion featuring an inner wall and an outer wall so that an annular space is defined therebetween and a top wall extending between the inner and outer walls;
- wherein the primary sealing portion and the initial sealing portion are integrally formed together;
- and
- a coil spring positioned within the annular space of the initial sealing portion and configured so as to urge the inner wall into engagement with the piston rod and the outer wall into engagement with the pump housing.
Dependencies are inferred from the claim text.