US3561467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve case construction
Assignee: Aigo Tec GmbH
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Filing: 1968-09-25
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Granted: 1971-02-09
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Expires: 1988-09-25
Abstract
Abstract A valve case construction particularly for use for tire valves includes a tubular housing having an exterior surface with an annular groove into which is inserted a gasket of a material having very little sensitivity to temperature and which has little or no tendency toward cold flow, such as a polyvinylidene fluoride. The gasket includes fins, or teeth, which project into corresponding recesses of the valve case housing groove base. The valve case housing also includes an inwardly extending depression in the groove which provides a free space behind the gasket into which the gasket may yield under stress. The valve case also includes an indented wall forming a shoulder for the valve spring and a widened interior area immediately before the shoulder to facilitate the air flow through the housing. The valve rod includes a disc seal which is adapted to bear against the end of the housing in a closed position and it is provided with a conical portion adjacent the seal having a plurality of radial grooves distributed uniformly around its circumference which connect tangentially into the surface of the seal and provide a streamlined flow for the air which is thus directed over the surface of the seal and insures that it is maintained clean.
Inventors
- 👤 Sepp Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:51
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/20; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/3786
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
242 words
A valve case, particularly for threading into the tubular valve shaft of a pneumatic tire or tube, comprising, in combination, a one-piece valve case housing, of tubular configuration, having external threads at its outer end for screwing of the valve case housing into a tubular valve shaft having internal threads; said housing having an annular groove in its external surface intermediate its ends; a sealing gasket in said groove engageable with the internal surface of the valve shaft when said housing is screwed into the valve shaft; said gasket consisting of a synthetic resin which is substantially temperature insensitive and substantially nonadherent to metal, and which is free of cold flow; the interior surface of said gasket and the base of said groove having interfitting formations preventing relative axial displacement of said gasket along said housing; a valve stem extending through said housing and projecting from the outer end of said housing, and having a substantially conical annular rib adjacent the inner end of said housing; said stem having a valve disc portion, adjacent said conical rib and exteriorly of said housing, including a sealing insert abutting against the inner end of said housing to close said housing; said conical annular rib being formed with at least one radial groove, for air flow, which is arcuate in an axial plane, substantially tangent at one end to said valve stem, and substantially tangent at the opposite end to the surface of said insert.
Claim 2
Dependent Claim
242 words
A valve case, particularly for threading into the tubular valve shaft of a pneumatic tire or tube, comprising, in combination, a one-piece valve case housing, of tubular configuration, having external threads at its outer end for screwing of the valve case housing into a tubular valve shaft having internal threads; said housing having an annular groove in its external surface intermediate its ends; a sealing gasket in said groove engageable with the internal surface of the valve shaft when said housing is screwed into the valve shaft; said gasket consisting of a synthetic resin which is substantially temperature insensitive and substantially nonadherent to metal, and which is free of cold flow; the interior surface of said gasket and the base of said groove having interfitting formations preventing relative axial displacement of said gasket along said housing; a valve stem extending through said housing and projecting from the outer end of said housing, and having a substantially conical annular rib adjacent the inner end of said housing; said stem having a valve disc portion, adjacent said conical rib and exteriorly of said housing, including a sealing insert abutting against the inner end of said housing to close said housing; said conical annular rib being formed with at least one radial groove, for air flow, which is arcuate in an axial plane, substantially tangent at one end to said valve stem, and substantially tangent at the opposite end to the surface of said insert.
Claim 3
Dependent Claim
48 words
A valve case, according to claim 1, wherein said gasket is provided with an interior surface having a projecting fin, said annular groove of the valve case housing having a base with an inwardly directed portion for accommodating the projecting fin for securing said gasket against axial displacement.
Claim 4
Dependent Claim
43 words
A valve case, according to claim 1 wherein said valve case housing is provided with a depression at the base of said annular groove into which said gasket protrudes only partly, the remaining portion providing a space for the yielding of said gasket.
Claim 5
Dependent Claim
56 words
A valve case, according to claim 1, having a threaded part adjacent its one end and an indented part adjacent its opposite end forming a shoulder on the interior thereof, a valve stem in said housing, a valve return spring abutting against said stem at its one end and against said shoulder at its opposite end.
Claim 6
Dependent Claim
33 words
A valve case, according to claim 4, wherein said housing is provided with a widening on the interior directly adjacent said shoulder, the bore at said shoulder corresponding to the standard tire dimension.
Claim 7
Dependent Claim
50 words
A valve case, according to claim 1, wherein the exterior of said valve case housing is provided with a bead which projects outwardly, the maximum diameter of said bead being at least equal to the diameter of the bore of the valve shaft with which it is to be employed.
Claim 8
Dependent Claim
30 words
A valve case, according to claim 6, wherein said bead has a surface against which said annular gasket abuts disposed on its upstream side in respect to the filling direction.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |