US3736951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mushroom-shaped drain valve and method of using the same
Assignee: Individual
•
Filing: 1972-03-20
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Granted: 1973-06-05
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Expires: 1992-03-20
Abstract
Abstract A mushroom-shaped drain valve for draining irrigation pipes has nibs placed around the periphery of the flat radial surface of the cap, which is the valve seating surface. The nibs hold the seating surface up from the pipe for a greater clearence to allow the water to drain faster, and, also, enables the valve to be used upon a flat surface. The flange which holds the valve in place has radial ridges so the valve may also be used as a vent valve and the flange does not seal upon venting.
Inventors
- 👤 R Purtell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:17
CPC Classifications
F; F16; F16K; F16K24/00; F16K24/04; Y; Y10; Y10S; Y10S285/00; Y10S285/91; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2557; Y10T137/3149; Y10T137/3185; Y10T137/3294
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
117 words
In a mushroom-shaped rubber drain valve adapted to be inserted through a hole in a vessel to be drained, said valve having a. a circular cap having a radial face, b. said cap adapted to be in the vessel in use, c. an integral stem co-axially with the cap, and d. a circular integral flange having a face, e. said flange on the stem opposite the cap and adapted to be outside the vessel in use; f. The improvement comprising: g. a series of nibs along the radial face of the cap attached to the stem, h. so that in use the radial face of the cap is elevated from the interior of the vessel while draining.
Claim 2
Dependent Claim
117 words
In a mushroom-shaped rubber drain valve adapted to be inserted through a hole in a vessel to be drained, said valve having a. a circular cap having a radial face, b. said cap adapted to be in the vessel in use, c. an integral stem co-axially with the cap, and d. a circular integral flange having a face, e. said flange on the stem opposite the cap and adapted to be outside the vessel in use; f. The improvement comprising: g. a series of nibs along the radial face of the cap attached to the stem, h. so that in use the radial face of the cap is elevated from the interior of the vessel while draining.
Claim 3
Dependent Claim
46 words
The invention as defined in claim 1 with the additional limitation of j. a series of radial ridges along the face of the flange attached to the stem, k. so that in use the face of the flange is held from the exterior of the vessel.
Claim 4
Dependent Claim
41 words
The invention as defined in claim 2 with the additional limitations of m. a lip extending along the periphery of the cap, n. the lip thinner than the remainder of the cap, o. the nibs along the underside of the lip.
Claim 5
Dependent Claim
19 words
The invention as defIned in claim 3 with the additional limitation of p. the underside of the cap concave.
Claim 6
Dependent Claim
112 words
In a mushroom-shaped rubber drain valve adapted to be inserted through a hole in a vessel to be drained, said valve having a. a circular cap, b. said cap adapted to be in the vessel in use, c. an integral stem co-axially with the cap, and d. a circular integral flange having a face, e. said flange on the stem opposite the cap and adapted to be outside the vessel in use; f. The improvement comprising: g. a series of radial ridges along the face of the flange attached to the stem, h. so that in use the face of the flange is held from the exterior of the vessel while venting.
Claim 7
Dependent Claim
112 words
In a mushroom-shaped rubber drain valve adapted to be inserted through a hole in a vessel to be drained, said valve having a. a circular cap, b. said cap adapted to be in the vessel in use, c. an integral stem co-axially with the cap, and d. a circular integral flange having a face, e. said flange on the stem opposite the cap and adapted to be outside the vessel in use; f. The improvement comprising: g. a series of radial ridges along the face of the flange attached to the stem, h. so that in use the face of the flange is held from the exterior of the vessel while venting.
Claim 8
Independent Claim
132 words
The method of draining fluid from and sealing a hole in the bottom of a vessel comprising: a. placing a rubber valve over the hole with a cap on the valve in the vessel, b. maintaining the valve in proper position with a stem integral with the valve extending through the hole, c. elevating the cap of the valve from the interior surfaces of the vessel by flexible nibs on the cap of the valve, d. allowing fluid to flow between the interior surface of the vessel and the bottom of the cap of the valve, and e. sealing the hole in the vessel responsive to pressure within the vessel by causing the pressure to force the valve cap downward, thereby spreading the edge of the cap with the nibs extending outward.
Claim 9
Independent Claim
132 words
The method of draining fluid from and sealing a hole in the bottom of a vessel comprising: a. placing a rubber valve over the hole with a cap on the valve in the vessel, b. maintaining the valve in proper position with a stem integral with the valve extending through the hole, c. elevating the cap of the valve from the interior surfaces of the vessel by flexible nibs on the cap of the valve, d. allowing fluid to flow between the interior surface of the vessel and the bottom of the cap of the valve, and e. sealing the hole in the vessel responsive to pressure within the vessel by causing the pressure to force the valve cap downward, thereby spreading the edge of the cap with the nibs extending outward.
Claim 10
Dependent Claim
40 words
The invention as defined in claim 6 with the additional limitation of f. elevating the cap from the interior a full 360* around the cap, and g. allowing fluid to flow a full 360* around the cap of the valve.
Claim 11
Independent Claim
140 words
The method of venting air into and sealing a hole in the top of a vessel comprising: a. placing a rubber valve over the hole with a cap on the valve in the vessel, b. maintaining the valve in proper position with a stem integral with the valve extending through the hole, c. having a flange on the stem outside the vessel to prevent the stem from falling through the hole, d. elevating the flange from the exterior surface of the vessel by radial ridges on the flange, e. allowing air to flow between the radial ridges and the exterior surface of the vessel, and f. sealing the hole in the vessel responsive to pressure within the vessel by causing the pressure to force the valve cap outward, thereby g. sealing the cap against the interior surface of the vessel.
Claim 12
Independent Claim
140 words
The method of venting air into and sealing a hole in the top of a vessel comprising: a. placing a rubber valve over the hole with a cap on the valve in the vessel, b. maintaining the valve in proper position with a stem integral with the valve extending through the hole, c. having a flange on the stem outside the vessel to prevent the stem from falling through the hole, d. elevating the flange from the exterior surface of the vessel by radial ridges on the flange, e. allowing air to flow between the radial ridges and the exterior surface of the vessel, and f. sealing the hole in the vessel responsive to pressure within the vessel by causing the pressure to force the valve cap outward, thereby g. sealing the cap against the interior surface of the vessel.
References Cited (Backward Citations)
US2946341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |