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US 7,395,835 B1Granted
Air admittance valve
AssigneeRectorseal Corporation
InventorHenry J. Gohlke
Life of this patent
Estimating the term…
Abstract
In some embodiments, an air admittance valve includes a base, a screen plate and a diaphragm engageable with the screen plate. The diaphragm may include a first center disk having a stem and a membrane coupled to the first center disk. The membrane may have a continuous material sized to extend beyond a perimeter of the first center disk, be formed of a material more pliable than the first center disk and be adapted to be coupled to the first center disk through the center disk stem.
Claims21
An air admittance valve, comprising:
- a. a base;
- b. a screen plate having an opening formed therethrough establishing a flow path and having a seat disposed around the opening, the screen plate being coupled to the base;
- and
- c. a diaphragm slidably engaged with the screen plate, comprising:
- i) a first center disk of a first material having a hollow stem extending at an angle to a plane of the first center disk;
- and
- ii) a continuous lateral membrane coupled to the first center disk, and having a continuous material sized to extend beyond a perimeter of the first center disk and engage the seat across the flow path, the continuous lateral membrane being formed of a second material more pliable than the first material and adapted to be coupled to the first center disk through the first center disk hollow stem.
4 more elements
An air admittance valve, comprising:
- a base;
- a screen plate coupled to the base, the screen plate comprising a central opening having a seat and a perimeter opening, wherein the central opening is in fluid communication with a first chamber in the valve and the perimeter opening is in fluid communication with a second chamber in the valve;
- and
- a diaphragm adapted to sealingly engage the seat of the central opening, the diaphragm including
- a first center disk having a stem extending at an angle to a plane of the center disk,
- a continuous lateral membrane coupled to the first center disk and sized to extend beyond a perimeter of the first center disk, and
- a second center disk coupled to the continuous lateral membrane distally from the first center disk,
- wherein the continuous lateral membrane is formed of a material more pliable than the first and second center disks and is continuously disposed between the first center disk and second center disk.
5 more elements
An air admittance valve, comprising:
- a base;
- a screen plate coupled to the base, the screen plate comprising a central opening having a seat and a perimeter opening, wherein the central opening is in fluid communication with a first chamber in the valve and the perimeter opening is in fluid communication with a second chamber in the valve;
- and
- a diaphragm adapted to sealingly engage the seat of the central opening, the diaphragm including
- a first center disk having a stem extending at an angle to a plane of the center disk, and
- a continuous lateral membrane coupled to the first center disk and sized to extend beyond a perimeter of the first center disk,
- wherein the continuous lateral membrane is formed of a material more pliable than the first and second center disks and comprises a membrane stem adapted to guide the diaphragm in reciprocating movement.
4 more elements
An air admittance valve, comprising:
- a base;
- a screen plate coupled to the base, the screen plate including an opening formed therethrough establishing a flow path and a seat disposed around the opening;
- and
- a diaphragm engageable with the screen plate, the diaphragm including
- a first center disk including at least one membrane adherence opening formed therein and a first stem extending at an angle to a plane of the first center disk,
- a second center disk including at least one membrane adherence opening formed therein and a second stem extending at an angle to a plane of the second center disk in a direction opposite to the direction of the first stem, and
- a lateral membrane extending between and coupled to the first and second center disks, the lateral membrane extending into at least one membrane adherence opening of each of the first and second center disks, being constructed of a material that is more pliable than the first and second center disks and capable of releaseably engaging the seat around the flow path.
4 more elements
Dependencies are inferred from the claim text.