US4763709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire inflation system
Assignee: L3 Technologies Inc
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Filing: 1986-07-03
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Granted: 1988-08-16
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Expires: 2006-07-03
Abstract
Abstract The present invention discloses a system for varying the inflation pressure in the tires of a vehicle in order to obtain an operator selected tire deflection. The system includes a source of pressure which is fluidly connected through an inflation valve to the tires which, upon actuation, increases the tire pressure. Conversely, a deflation valve is also connected to the tire and, upon actuation, exhausts fluid from the tires thus decreasing the tire pressure. A pressure sensor detects the pressure representative of the pressure within the tires and a further sensor detects the vehicle load while a switch arrangement allows the operator to select between at least two different tire deflection levels. An electronic control unit receives input signals from the pressure and further sensors as well as from the switch arrangement and selectively actuates the inflation or deflation valves until a tire pressure corresponding to the desired tire deflection is obtained.
Inventors
- 👤 Richard A. Scholer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:04
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/001; B60C23/002; B60C23/003; B60C23/00354; B60C23/00372
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
157 words
For use with a vehicle having at least two tires, a system for varying the pressure in said tires to obtain a user selected tire deflection comprising: a source of fluid pressure, means for fluidly connecting said pressure source to the tires comprising a fluid conduit means and a first valve means connected in series in said fluid conduit means between said pressure source and said tire which, upon actuation, fluidly connects said fluid source to the tires, a second valve means connected to said conduit means which, upon actuation, exhausts fluid pressure from the tires, first means for measuring a parameter representative of tire load, second means for measuring a pressure representative of the tire pressure, means for selecting between at least two different tire deflection levels, means responsive to said first and second measuring means and said selecting means for selectively actuating said first or second valve means to obtain the selected tire deflection level.
Claim 2
Dependent Claim
157 words
For use with a vehicle having at least two tires, a system for varying the pressure in said tires to obtain a user selected tire deflection comprising: a source of fluid pressure, means for fluidly connecting said pressure source to the tires comprising a fluid conduit means and a first valve means connected in series in said fluid conduit means between said pressure source and said tire which, upon actuation, fluidly connects said fluid source to the tires, a second valve means connected to said conduit means which, upon actuation, exhausts fluid pressure from the tires, first means for measuring a parameter representative of tire load, second means for measuring a pressure representative of the tire pressure, means for selecting between at least two different tire deflection levels, means responsive to said first and second measuring means and said selecting means for selectively actuating said first or second valve means to obtain the selected tire deflection level.
Claim 3
Dependent Claim
32 words
The invention as defined in claim 1 wherein the vehicle includes an air suspension system and wherein said first measuring means comprises means for measuring the pressure in the air suspension system.
Claim 4
Dependent Claim
22 words
The invention as defined in claim 1 wherein said first and second valve means each comprises a normally closed, electrically operated valve.
Claim 5
Dependent Claim
45 words
The invention as defined in claim 1 wherein the vehicle includes an ignition system and comprising a normally closed shut off valve in series between said conduit means and each tire, means for opening said shut off valves upon activation of the vehicle ignition system.
Claim 6
Dependent Claim
36 words
The invention as defined in claim 4 wherein said shut off valve opening means comprises means for delaying the opening of said shut off valves until a predetermined time period following activation of the ignition system.
Claim 7
Dependent Claim
36 words
The invention as defined in claim 4 and comprising means for detecting rapid deflation of each tire, and means responsive to said detecting means for closing the shut off valve associated with the rapidly deflating tire.
Claim 8
Dependent Claim
20 words
The invention as defined in claim 6 wherein said detecting means comprises a differential pressure gauge connected between two tires.
Claim 9
Dependent Claim
28 words
The invention as defined in claim 1 and comprising a fluid pressure accumulator fluidly connected to said conduit means, said pressure measuring means being positioned in said accumulator.
Claim 10
Dependent Claim
21 words
The invention as defined in claim 8 and comprising means for restricting fluid flow between said conduit means and said accumulator.
Claim 11
Dependent Claim
15 words
The invention as defined in claim 9 wherein said restricting means comprises a needle valve.
Claim 12
Dependent Claim
34 words
The invention as defined in claim 9 wherein said restricting means comprises means for restricting the flow into said accumulator by a different amount than for restricting the fluid flow out of said accumulator.
Claim 13
Dependent Claim
189 words
For use with a vehicle having at least a front tire and a rear tire, a system for independently varying the pressure in each said tires to obtain a user selected tire deflection comprising: a source of fluid pressure, means for fluidly connecting said pressure source to the tires comprising a fluid conduit means and a pair of first valve means, one first valve means connected in series in said fluid conduit means between said pressure source and each said tire which, upon actuation, fluidly connects said fluid source to its associated tire, a pair of second valve means, one valve means connected to said conduit means for each tire which, upon actuation, exhausts fluid pressure from its associated tire, first means for measuring a parameter representative of tire load for each tire, second means for measuring a pressure representative of tire pressure for each tire, means for selecting between at least two different tire deflection levels, means responsive to said first and second measuring means and said selecting means for selectively actuating said first or second valve means to obtain the selected tire deflection level in each tire.
Claim 14
Dependent Claim
189 words
For use with a vehicle having at least a front tire and a rear tire, a system for independently varying the pressure in each said tires to obtain a user selected tire deflection comprising: a source of fluid pressure, means for fluidly connecting said pressure source to the tires comprising a fluid conduit means and a pair of first valve means, one first valve means connected in series in said fluid conduit means between said pressure source and each said tire which, upon actuation, fluidly connects said fluid source to its associated tire, a pair of second valve means, one valve means connected to said conduit means for each tire which, upon actuation, exhausts fluid pressure from its associated tire, first means for measuring a parameter representative of tire load for each tire, second means for measuring a pressure representative of tire pressure for each tire, means for selecting between at least two different tire deflection levels, means responsive to said first and second measuring means and said selecting means for selectively actuating said first or second valve means to obtain the selected tire deflection level in each tire.
References Cited (Backward Citations)
US3102573A
Cited
US3099309A
Cited
US3835451A
Cited
US3911434A
Cited
US3927708A
Cited
US3971425A
Cited
US4090172A
Cited
US4163208A
Cited
US4157530A
Cited
US4103283A
Cited
US4117281A
Cited
US4313483A
Cited
US4316176A
Cited
US4348654A
Cited
US4311985A
Cited
US4330774A
Cited
US4386247A
Cited
US4363020A
Cited
US4421151A
Cited
US4456038A
Cited
US4387931A
Cited
US4418737A
Cited
US4619303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |