Seal assemblies for use with fluid valves
AssigneeFisher Controls International LLC
InventorsJ. Adin Mann, III, Shawn William Anderson
Life of this patent
Estimating the term…
Abstract
Seal assemblies for use with fluid valves are described. An example apparatus includes a cage; a plug including a seal gland; and means for sealingly engaging an inner surface of the cage at least partially positioned in the seal gland and including a first portion and a second portion, in response to a fluid acting on the first portion in a first direction, the first portion to engage, outwardly urge, and splay the second portion to sealingly engage the cage, in response to the fluid acting in a second direction, the second portion to deter the fluid from acting on the first portion, the first direction opposite the second direction.
Claims20
An apparatus, comprising:
- a cage;
- a plug including a seal gland;
- a retainer coupled to the plug;
- a unidirectional seal disposed within the seal gland, the seal having a first aperture and a second aperture, the first aperture and the second aperture having respective openings facing the retainer, the retainer to engage a first end of the seal defining the first aperture, the seal confined between the retainer and a surface of the seal gland opposite the retainer;
- and
- a back-up ring including a tapered protrusion, the back-up ring disposed within the first aperture, the tapered protrusion extending into the second aperture, a fluid to act on a first surface of the back-up ring to urge the tapered protrusion to move into the second aperture, an engagement between the tapered protrusion and the second aperture to outwardly urge and splay the seal into sealing engagement with an inner surface of the cage, the back-up ring being disposed within the first aperture to deter the fluid from acting on a second surface of the back-up ring, the first surface opposite the second surface.
An apparatus, comprising:
- a cage;
- a plug including a seal gland;
- a retainer coupled to the plug;
- a housing disposed within the seal gland, the housing having an opening facing the retainer, the retainer to engage an end of the housing defining the opening to retain the housing within the seal gland;
- a back-up ring including a tapered protrusion, the back-up ring disposed within the housing, an interaction between an exterior surface of the back-up ring and an interior surface of the housing to guide movement of the back-up ring within the housing between a first position and a second position;
- and
- a seal defining a groove to receive the tapered protrusion, the seal disposed within the housing, a fluid to act on the back-up ring to urge the tapered protrusion to move into the groove and to position the back-up ring in the first position, in the first position, the tapered protrusion being further within the groove than in the second position, an engagement between the tapered protrusion and the groove to outwardly urge and splay the housing, via the seal, into sealing engagement with an inner surface of the cage.
An apparatus, comprising:
- a cage;
- a plug including a seal gland;
- and
- a unidirectional seal, including:
- a male portion;
- and
- a female portion to house the male portion to enable a fluid to act on a first end of the male portion and to deter the fluid from acting on a second end of the male portion opposite the first end, in response to the fluid acting on the first end of the male portion, the male portion to outwardly urge and splay the female portion into sealing engagement with an inner surface of the cage.
An apparatus, comprising:
- a cage;
- a plug including a seal gland;
- and
- means for sealingly engaging an inner surface of the cage at least partially positioned in the seal gland and including a first portion and a second portion, in response to a fluid acting on the first portion in a first direction, the first portion to engage, outwardly urge, and splay the second portion to sealingly engage the cage, in response to the fluid acting in a second direction, the second portion to deter the fluid from acting on the first portion, the first direction opposite the second direction.
Dependencies are inferred from the claim text.