US3773064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve stem sealing ring
Assignee: Precision Valve Corp
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Filing: 1971-05-07
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Granted: 1973-11-20
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Expires: 1991-05-07
Abstract
Abstract A sealing system for pressurized container valves particularly designed for the dispensing of solid products in powdered form including means for preventing the disabling buildup of the product residue on the sealing surfaces.
Inventors
- 👤 J Focht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:06
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/44; B65D83/48; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/4336
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
146 words
A dispensing valve for a pressurized aerosol container comprising: a valve housing, a valve body movable axially with respect to the housing between closed and open positions, the valve body having a discharge passage communicating with the exterior of the container, and a valve orifice extending radially into communication with said discharge passage, an annular resilient sealing gasket having a central aperture defined by a sealing surface encompassing and sealing said valve orifice when the valve body is in the closed position, means to bias the valve body toward the closed position, and an annular ridge means encircling said valve body located interiorly of the container from the valve orifice on a portion of the valve body encompassed and sealed by the resilient sealing means when the valve body is in the closed position with said ridge means engaging the sealing surface of said annular gasket.
Claim 2
Dependent Claim
146 words
A dispensing valve for a pressurized aerosol container comprising: a valve housing, a valve body movable axially with respect to the housing between closed and open positions, the valve body having a discharge passage communicating with the exterior of the container, and a valve orifice extending radially into communication with said discharge passage, an annular resilient sealing gasket having a central aperture defined by a sealing surface encompassing and sealing said valve orifice when the valve body is in the closed position, means to bias the valve body toward the closed position, and an annular ridge means encircling said valve body located interiorly of the container from the valve orifice on a portion of the valve body encompassed and sealed by the resilient sealing means when the valve body is in the closed position with said ridge means engaging the sealing surface of said annular gasket.
Claim 3
Dependent Claim
65 words
The valve as described in claim 1, wherein the valve body includes an upstanding hollow stem portion including said discharge passage, a cylindrical portion of smaller diameter than the stem portion, and an interposed conical portion tapering from the stem portion to the cylindrical portion, the radial valve orifice being located in said conical portion and the ridge means being located on said cylindrical portion.
Claim 4
Dependent Claim
33 words
The valve as described in claim 2, wherein the ridge means comprises at least one circumferential projection on the valve body in a plane substantially prependicular to the axis of the valve body.
Claim 5
Dependent Claim
21 words
The valve as described in claim 3, wherein the cross section of the projection is a shape having a sharp apex.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |