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US4557308A
Expired / Lapsed
US
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Tire valve and low pressure indicator
Assignee: Schrader Automotive Inc
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Filing: 1984-06-18
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Granted: 1985-12-10
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Expires: 2004-06-18
Abstract
Abstract Flexible check-valve-like baffle is provided in low pressure indicator to assure proper seating of poppet and maximum flow during fill.
Inventors
- 👤 Harold A. Kuypers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:52
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/02; B60C23/04; B60C23/0491; B60C23/0496; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/3662; Y10T137/3677; Y10T137/7722; Y10T137/7754; Y10T137/7755; Y10T137/7837; Y10T137/7869
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
225 words
In a tire valve and low pressure indicator having a tubular body adapted to be mounted in the rim hole opening of a vehicle wheel and having a seat disposed inward of the rim in the tire chamber, a poppet seating on the seat and a spring in the tubular body compressively disposed against the poppet and urging it off its seat and indicator means disposed in the tubular body and adapted upon the unseating of the poppet to be driven by the air coming into the tubular body away from the seat to a signal position; the improvement of the tubular body having an annular projecting skirt outward from the seat, circular flexible baffle means carried by the poppet and extending outward therefrom, the periphery of the baffle means being proximate to the wall of the skirt when the poppet is open, the baffle means flexing outward as air is admitted past the seat into the tire chamber to permit increased flow between the baffle means and the wall, but limiting such flow in the opposite direction to assure a proper seating of the poppet by the pressure of air in the tire chamber, the poppet having a central recess and the baffle means having a central projection disposed in the recess whereby the baffle means is generally centered with respect to the poppet.
Claim 2
Dependent Claim
225 words
In a tire valve and low pressure indicator having a tubular body adapted to be mounted in the rim hole opening of a vehicle wheel and having a seat disposed inward of the rim in the tire chamber, a poppet seating on the seat and a spring in the tubular body compressively disposed against the poppet and urging it off its seat and indicator means disposed in the tubular body and adapted upon the unseating of the poppet to be driven by the air coming into the tubular body away from the seat to a signal position; the improvement of the tubular body having an annular projecting skirt outward from the seat, circular flexible baffle means carried by the poppet and extending outward therefrom, the periphery of the baffle means being proximate to the wall of the skirt when the poppet is open, the baffle means flexing outward as air is admitted past the seat into the tire chamber to permit increased flow between the baffle means and the wall, but limiting such flow in the opposite direction to assure a proper seating of the poppet by the pressure of air in the tire chamber, the poppet having a central recess and the baffle means having a central projection disposed in the recess whereby the baffle means is generally centered with respect to the poppet.
Claim 3
Dependent Claim
29 words
A tire valve and low pressure indicator as claimed in claim 1 wherein the baffle means has notch means in its periphery to pass air in the outward direction.
Claim 4
Dependent Claim
47 words
A tire valve and low pressure indicator as claimed in claim 1 wherein a retainer extends across the distal end of the wall and the baffle means has a central bump on its outer surface to space the periphery of the baffle means away from the retainer.
Claim 5
Dependent Claim
28 words
A tire valve and low pressure indicator as claimed in claim 1 wherein the inside surface of the wall is tapered increasing in diameter away from the seat.
Claim 6
Dependent Claim
161 words
A valve and low-pressure indicator assembly for a pressurized container comprising: (a) a tubular housing having a downwardly facing seat disposed in the container and downward annular skirt surrounding the seat having an inside wall with an outward taper away from the seat; (b) a valve poppet cooperating with the seat, and comprising a rigid hat-shaped element having a flat, flexible elastomeric layer secured to the top of the brim of the rigid hat-shaped element to comprise a valve surface and extending outward beyond the brim to comprise a flexible annular baffle; (c) spring means biasing the valve poppet away from the seat, the spring means being overcomeable by air pressure within the container to close the poppet above a pre-established pressure; and (d) an indicator piston receiprocable in the housing and having an upper portion adapted to be seen and indicate low pressure, whereby the baffle assists in the closing action of the poppet and normally engages the tapered wall.
Claim 7
Dependent Claim
161 words
A valve and low-pressure indicator assembly for a pressurized container comprising: (a) a tubular housing having a downwardly facing seat disposed in the container and downward annular skirt surrounding the seat having an inside wall with an outward taper away from the seat; (b) a valve poppet cooperating with the seat, and comprising a rigid hat-shaped element having a flat, flexible elastomeric layer secured to the top of the brim of the rigid hat-shaped element to comprise a valve surface and extending outward beyond the brim to comprise a flexible annular baffle; (c) spring means biasing the valve poppet away from the seat, the spring means being overcomeable by air pressure within the container to close the poppet above a pre-established pressure; and (d) an indicator piston receiprocable in the housing and having an upper portion adapted to be seen and indicate low pressure, whereby the baffle assists in the closing action of the poppet and normally engages the tapered wall.
Claim 8
Dependent Claim
25 words
A valve and low pressure indicator as claimed in claim 5 wherein the baffle means is formed with at least one notch in its periphery.
Claim 9
Dependent Claim
19 words
A valve and low pressure indicator as claimed in claim 5 wherein a poppet-and-baffle-means-retainer is disposed across the skirt.
Claim 10
Dependent Claim
171 words
A low-pressure-activated indicating valve having a tubular body adapted to be mounted in a container wall and having a seat disposed facing inward of the container, a poppet having a seal seating on the seat and a spring in the tubular body compressively disposed against the poppet and urging it off its seat, the tubular body having an annular projecting skirt outward from the seat, outwardly extending generally circular flexible baffle means carried by the poppet, the periphery of the baffle means extending outward beyond the diameter of the seat, the poppet having a central recess and the baffle means having a central projection disposed in the recess whereby the baffle means is generally centered with respect to the poppet, the baffle means flexing outward as air is admitted past the seat into the container to permit increased flow between the baffle means and the skirt, but limiting such flow in the opposite direction to assure a proper seating of the poppet by the pressure of air in the tire chamber.
Claim 11
Dependent Claim
171 words
A low-pressure-activated indicating valve having a tubular body adapted to be mounted in a container wall and having a seat disposed facing inward of the container, a poppet having a seal seating on the seat and a spring in the tubular body compressively disposed against the poppet and urging it off its seat, the tubular body having an annular projecting skirt outward from the seat, outwardly extending generally circular flexible baffle means carried by the poppet, the periphery of the baffle means extending outward beyond the diameter of the seat, the poppet having a central recess and the baffle means having a central projection disposed in the recess whereby the baffle means is generally centered with respect to the poppet, the baffle means flexing outward as air is admitted past the seat into the container to permit increased flow between the baffle means and the skirt, but limiting such flow in the opposite direction to assure a proper seating of the poppet by the pressure of air in the tire chamber.
Claim 12
Dependent Claim
22 words
A valve as claimed in claim 8 wherein the skirt has a tapered interior wall increasing in diameter away from the seat.
Claim 13
Dependent Claim
24 words
A valve as claimed in claim 8 wherein the baffle means has notch means in its periphery to pass air in the outward direction.
Claim 14
Dependent Claim
18 words
A valve as claimed in claim 8 wherein a retainer extends across the distal end of the skirt.
Claim 15
Dependent Claim
23 words
A valve as claimed in claim 11 wherein a central portion of the retainer is set inward from the end of the skirt.
References Cited (Backward Citations)
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US3198208A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |