US5230243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for surveillance of tire pressures
Assignee: Wabco Westinghouse Fahrzeugbremsen GmbH
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Filing: 1990-09-12
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Granted: 1993-07-27
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Expires: 2010-09-12
Abstract
Abstract The tire surveillance device of the invention includes a pressure measurement member, where the signal of the pressure measurement member is corrective dependent on the temperature and evaluation unit actuated by the resulting signal. The correction member (21, 34) is disposed such that it is exposed to the temperature prevailing outside of the tire (1). The disposition of the correction member avoids considering erroneous temperatures resulting for example from a heat stream generated by the braking device in the rim of the wheel.
Inventors
- 👤 Reinecke Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:19
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/20
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
181 words
A device for tire pressure surveillance comprising a housing disposed outside of a tire; a pressure measurement and correction member disposed in the housing, communicating to the interior of the tire and furnishing a tire pressure dependent signal correcting the signal delivered by the pressure measurement member depending on temperature, wherein the pressure measurement and correction member is exposed to a temperature prevailing outside of the tire; an evaluation device connected to the pressure measurement and correction member and actuated by the signal of the pressure measurement member in cases where the tire pressure drops to below a tire pressure limiting value, said evaluation device including a valve slider connected to the measurement and correction member and wherein the valve slider forms with the housing a first valve for communicating the pressure within the tire to an error signal output port when the tire pressure drops to below a tire pressure limiting value and wherein the valve slider forms with the housing a second valve to communicate ambient pressure to said error signal output port when said tire is properly inflated.
Claim 2
Independent Claim
181 words
A device for tire pressure surveillance comprising a housing disposed outside of a tire; a pressure measurement and correction member disposed in the housing, communicating to the interior of the tire and furnishing a tire pressure dependent signal correcting the signal delivered by the pressure measurement member depending on temperature, wherein the pressure measurement and correction member is exposed to a temperature prevailing outside of the tire; an evaluation device connected to the pressure measurement and correction member and actuated by the signal of the pressure measurement member in cases where the tire pressure drops to below a tire pressure limiting value, said evaluation device including a valve slider connected to the measurement and correction member and wherein the valve slider forms with the housing a first valve for communicating the pressure within the tire to an error signal output port when the tire pressure drops to below a tire pressure limiting value and wherein the valve slider forms with the housing a second valve to communicate ambient pressure to said error signal output port when said tire is properly inflated.
Claim 3
Dependent Claim
19 words
The device according to claim 1, wherein the pressure measurement and correction member is disposed outside of the tire.
Claim 4
Dependent Claim
18 words
The device according to claim 2, wherein the pressure measurement and correction member is of an integrated construction.
Claim 5
Dependent Claim
38 words
The device according to claim 2 further comprising a pressure line connecting an interior of a tire to the pressure measurement and correction member, wherein the tire pressure of the tire is fed in via the pressure line.
Claim 6
Dependent Claim
18 words
The device according to claim 1, wherein the pressure measurement and correction member is a pressure measurement box.
Claim 7
Dependent Claim
30 words
The device according to claim 1, wherein the distance between the pressure measurement and correction member and the tire is at least about 0.2 times the width of the tire.
Claim 8
Dependent Claim
75 words
The device according to claim 1 further comprising a pressure line connecting an interior of a tire to the pressure measurement and correction member, wherein the tire pressure of the tire is fed in via the pressure line, wherein the pressure measurement and correction member is a pressure measurement box and wherein the distance between the pressure measurement and correction member and the tire is at least about 0.2 times the width of the tire.
Claim 9
Dependent Claim
13 words
Device according to claim 1, wherein the evaluation device includes an electronic circuit.
Claim 10
Dependent Claim
17 words
Device according to claim 1, wherein the pressure measurement and correction member includes a pressure measurement box.
Claim 11
Dependent Claim
33 words
Device according to claim 1, wherein the evaluation device includes an electronic circuit; and wherein the evaluation member includes a valve slider, an electronic circuit, a temperature sensor, and a pressure measurement box.
Claim 12
Dependent Claim
193 words
Device for tire pressure surveillance with a pressure measurement and correction member (4; 11; 21, 34) furnishing a tire pressure dependent signal and correcting depending on the temperature the signal of the pressure measurement member (2, 3; 4; 11; 21, 34), wherein the measurement and correction member (2, 3; 4; 11; 21, 34) is disposed outside of the tire and is subjected to a temperature prevailing outside of the tire (1), and an evaluation device (2; 32, 24, 29, 26, 27) actuated by the signal of the pressure measurement and correction member (2, 3; 4; 11; 21, 34) upon dropping of the tire pressure to below a tire pressure limiting value, wherein said evaluation device includes a valve slider connected to the correction member and wherein the valve slider forms with a housing a first valve (24, 29) for communicating the pressure within the tire to an error signal output port when the tire pressure drops to below a tire pressure limiting value and wherein the valve slider forms with the housing a second valve (26, 27) to communicate ambient pressure to said error signal output port when said tire is properly inflated.
Claim 13
Dependent Claim
193 words
Device for tire pressure surveillance with a pressure measurement and correction member (4; 11; 21, 34) furnishing a tire pressure dependent signal and correcting depending on the temperature the signal of the pressure measurement member (2, 3; 4; 11; 21, 34), wherein the measurement and correction member (2, 3; 4; 11; 21, 34) is disposed outside of the tire and is subjected to a temperature prevailing outside of the tire (1), and an evaluation device (2; 32, 24, 29, 26, 27) actuated by the signal of the pressure measurement and correction member (2, 3; 4; 11; 21, 34) upon dropping of the tire pressure to below a tire pressure limiting value, wherein said evaluation device includes a valve slider connected to the correction member and wherein the valve slider forms with a housing a first valve (24, 29) for communicating the pressure within the tire to an error signal output port when the tire pressure drops to below a tire pressure limiting value and wherein the valve slider forms with the housing a second valve (26, 27) to communicate ambient pressure to said error signal output port when said tire is properly inflated.
Claim 14
Dependent Claim
20 words
Device according to claim 11, wherein the evaluation device (2, 32, 24, 29, 26, 27) includes an electronic circuit (2).
Claim 15
Dependent Claim
21 words
Device according to claim 11, wherein the pressure measurement and correction member (11; 21, 34) is disposed outside of the tire.
Claim 16
Dependent Claim
17 words
Device according to claim 13, wherein the pressure measurement and correction member (21, 34) is constructively integrated.
Claim 17
Dependent Claim
20 words
Device according to claim 13, wherein the tire pressure of the device is fed in via a pressure line (10).
Claim 18
Dependent Claim
19 words
Device according to claim 11, wherein the pressure measurement and correction member is a pressure measurement box (21, 34).
Claim 19
Dependent Claim
28 words
Device according to claim 11, wherein the distance between the pressure measurement and correction member and the tire is at least 1/5 of the width of the tire.
Claim 20
Dependent Claim
86 words
Device according to claim 11, wherein the pressure measurement and correction member (11; 21, 34) is disposed outside of the tire, wherein the pressure measurement and correction member 21, 34 is constructively integrated, wherein the tire pressure of the device is fed in via a pressure line (10), wherein the pressure measurement and correction member is a pressure measurement box (21, 34), and wherein the distance between the pressure measurement and correction member and the tire is at least 1/5 of the width of the tire.
Claim 21
Dependent Claim
19 words
Device according to claim 11, wherein the pressure measurement and correction member includes a pressure measurement box (21, 34).
Claim 22
Dependent Claim
20 words
Device according to claim 11, wherein the evaluation device 2, 32, 24, 29, 26, 27) includes an electronic circuit (2).
Claim 23
Dependent Claim
127 words
A monitoring method for vehicle tire pressures comprising sensing a pressure prevailing in a vehicle tire with a pressure measurement and correction member disposed outside of the tire, communicating to the interior of the tire and furnishing a tire pressure dependent signal; correcting the tire pressure dependent signal depending on the temperature prevailing outside of the tire with the pressure measurement and correction member exposed to a temperature prevailing outside of the tire; evaluating the pressure dependent signal in an evaluation device connected to the pressure measurement member; communicating the pressure within the tire to an error signal output port when the tire pressure drops to below a tire pressure limiting value; communicating ambient pressure to said error signal output port when said tire is properly inflated.
Claim 24
Dependent Claim
127 words
A monitoring method for vehicle tire pressures comprising sensing a pressure prevailing in a vehicle tire with a pressure measurement and correction member disposed outside of the tire, communicating to the interior of the tire and furnishing a tire pressure dependent signal; correcting the tire pressure dependent signal depending on the temperature prevailing outside of the tire with the pressure measurement and correction member exposed to a temperature prevailing outside of the tire; evaluating the pressure dependent signal in an evaluation device connected to the pressure measurement member; communicating the pressure within the tire to an error signal output port when the tire pressure drops to below a tire pressure limiting value; communicating ambient pressure to said error signal output port when said tire is properly inflated.
Claim 25
Dependent Claim
24 words
The monitoring method for vehicle tire pressures according to claim 21 further comprising disposing the pressure measurement and correction member outside of the tire.
Claim 26
Dependent Claim
25 words
The monitoring method for vehicle tire pressures according to claim 21 further comprising integrating the pressure measurement and correction member into a single integrated construction.
Claim 27
Dependent Claim
40 words
The monitoring method for vehicle tire pressures according to claim 23 further comprising mechanically expanding and contracting a pressure measurement box forming the pressure measurement and correction member for deriving a mechanical motion capable of acting on a valve member.
Claim 28
Dependent Claim
38 words
The monitoring method for vehicle tire pressures according to claim 23 further comprising placing the pressure measurement and correction member at a distance of at least about 0.2 times the width of the tire away from the tire.
Claim 29
Dependent Claim
50 words
The monitoring method for vehicle tire pressures according to claim 21 further comprising installing a a pressure line connecting an interior of a tire to the pressure measurement and correction member; and feeding the tire pressure of the tire to the pressure measurement and correction member via the pressure line.
Claim 30
Dependent Claim
124 words
The monitoring method for vehicle tire pressures according to claim 21 further comprising disposing the pressure measurement and correction member outside of the tire; integrating the pressure measurement and correction member into a single integrated construction; installing a pressure line connecting an interior of a tire to the pressure measurement and correction member; feeding the tire pressure of the tire to the pressure measurement and correction member via the pressure line; mechanically expanding and contracting a pressure measurement box forming the pressure measurement and correction member for deriving a mechanical motion capable of acting on a valve member; and placing the pressure measurement and correction member at a distance of at least about 0.2 times the width of the tire away from the tire.
Claim 31
Dependent Claim
29 words
The device for tire pressure surveillance according to claim 21 further comprising actuating a final function device depending on the evaluating of the signal of the pressure measurement member.
Claim 32
Independent Claim
144 words
A device for tire pressure surveillance comprising: a pressure measurement member disposed within a housing, wherein the pressure measurement member is disposed outside of the tire, being exposed to a temperature prevailing outside the tire, and connected to the interior of the tire; a valve slider within the housing connected to said pressure measurement member; a first valve portion formed on the slider cooperating with a first element within the housing to communicate the pressure within the tire to an error signal output port in response to the actuation of the pressure measurement member when the tire pressure drops below a tire pressure limiting value; a second valve portion formed on the valve slider cooperating with a second element in the housing to communicate ambient pressure to said error signal output in response to the pressure measurement means when said tire is properly inflated.
Claim 33
Independent Claim
144 words
A device for tire pressure surveillance comprising: a pressure measurement member disposed within a housing, wherein the pressure measurement member is disposed outside of the tire, being exposed to a temperature prevailing outside the tire, and connected to the interior of the tire; a valve slider within the housing connected to said pressure measurement member; a first valve portion formed on the slider cooperating with a first element within the housing to communicate the pressure within the tire to an error signal output port in response to the actuation of the pressure measurement member when the tire pressure drops below a tire pressure limiting value; a second valve portion formed on the valve slider cooperating with a second element in the housing to communicate ambient pressure to said error signal output in response to the pressure measurement means when said tire is properly inflated.
Claim 34
Independent Claim
225 words
A device for tire pressure surveillance comprising a housing disposed outside of a tire; a pressure measurement member disposed in the housing and communicating to the interior of the tire and furnishing a tire pressure dependent signal; an evaluation device connected to the pressure measurement member and actuated by the signal of the pressure measurement member in cases where the tire pressure drops to below a tire pressure limiting value and furnishing a correction member for correcting the signal delivered by the pressure measurement member depending on temperature, wherein the correction member is exposed to a temperature prevailing outside of the tire; a valve slider disposed in the housing and connected to the evaluation device; a first valve formed by a first portion of the slider and a portion of the housing for generating a first type signal when the tire pressure drops to below a tire pressure limiting value; an error signal output port formed at the housing and connected to the first valve for receiving the first type signal and for communicating the first type signal; a second valve formed by a second portion of the slider and a portion of the housing and communicating to the output port for generating a second type signal when the tire pressure is properly inflated and for delivering the second type signal to the output port.
Claim 35
Independent Claim
225 words
A device for tire pressure surveillance comprising a housing disposed outside of a tire; a pressure measurement member disposed in the housing and communicating to the interior of the tire and furnishing a tire pressure dependent signal; an evaluation device connected to the pressure measurement member and actuated by the signal of the pressure measurement member in cases where the tire pressure drops to below a tire pressure limiting value and furnishing a correction member for correcting the signal delivered by the pressure measurement member depending on temperature, wherein the correction member is exposed to a temperature prevailing outside of the tire; a valve slider disposed in the housing and connected to the evaluation device; a first valve formed by a first portion of the slider and a portion of the housing for generating a first type signal when the tire pressure drops to below a tire pressure limiting value; an error signal output port formed at the housing and connected to the first valve for receiving the first type signal and for communicating the first type signal; a second valve formed by a second portion of the slider and a portion of the housing and communicating to the output port for generating a second type signal when the tire pressure is properly inflated and for delivering the second type signal to the output port.
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) | 1996-07-26 | 1997-01-25 | 1997-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-26 | 2001-01-25 | 2001-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-26 | 2005-01-25 | 2005-07-27 | $7700.00 | Window Closed / Lapsed |