Patent EP0313501A2 successfully refreshed from Google Patents.
EP0313501A2
Expired / Lapsed
EP
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Airspring height sensor
Assignee: Goodyear Tire and Rubber Co
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Filing: 1988-10-05
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Granted: —
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Expires: 2008-10-05
Abstract
Abstract An airspring height control device is disclosed based on an infrared light emitting diode (212) and photo transistor receiver (214) combination to reflect a signal from a reflector (216) located internally to an airspring (200). The variable output signal given off by the receiver is proportional to the distance from the transmitter/receiver to the reflector thus allowing a height controlling mechanism to respond to the signal and make the necessary adjustments.
Inventors
- 👤 Hubert Thomas Hovance
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 08:30
CPC Classifications
G; G01; G01S; G01S17/00; G01S17/02; G01S17/06; G01S17/08; B; B60; B60G; B60G17/00; B60G17/015; B60G17/019; B60G17/01933; B60G17/02; B60G17/04; B60G17/052; B60G2202/00; B60G2202/10; B60G2202/15; B60G2202/152; B60G2204/00; B60G2204/10; B60G2204/11; B60G2204/111; B60G2400/00; B60G2400/25; B60G2400/252; B60G2401/00; B60G2401/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
An airspring height control device characterized by: (a) an infrared light emitting diode transmitter capable of emitting light of a given wavelength; (b) a photo transistor receiver adjacent to said transmitter capable of detecting said light and sending a variable output signal (c) a reflector movably located at a distance from said transmitter and receiver to reflect the emitted light from the transmitter back to the receiver; (d) means for translating said variable output signal to provide an interface with a height controlling mechanism; and (e) a height controlling mechanism capable of controlling the distance between said reflector and the transmitter/receiver.
Claim 2
Dependent Claim
101 words
An airspring height control device characterized by: (a) an infrared light emitting diode transmitter capable of emitting light of a given wavelength; (b) a photo transistor receiver adjacent to said transmitter capable of detecting said light and sending a variable output signal (c) a reflector movably located at a distance from said transmitter and receiver to reflect the emitted light from the transmitter back to the receiver; (d) means for translating said variable output signal to provide an interface with a height controlling mechanism; and (e) a height controlling mechanism capable of controlling the distance between said reflector and the transmitter/receiver.
Claim 3
Dependent Claim
19 words
The device according to claim 1 further characterized by a photomask for selectively modifying the light from the transmitter.
Claim 4
Independent Claim
30 words
The device according to either of claims 1 or 2 characterized in that the transmitter is a gallium-aluminum-arsenide type diode and the receiver is a transimpedence amplifier with parallel feedback.
Claim 5
Independent Claim
23 words
The device according to any of claims 1 to 3 further characterized by a means for compensating for variations of the transmitted light.
Claim 6
Dependent Claim
61 words
The device according to claim 4 characterized in that the means for compensating for variations of the transmitted light is a feed back loop which establishes a base line voltage generated by one of a plurality of infrared diodes in the transmitter transmitting directly into the receiver, thereby establishing a reference voltage for use as a comparator of the system condition.
Claim 7
Independent Claim
23 words
The device according to any of claims 1 to 5 further characterized by a means for compensating for signal variations due to temperature.
Claim 8
Dependent Claim
19 words
The device according to claim 6 characterized in that the means for compensation for temperature is a thermistor device.
Claim 9
Dependent Claim
50 words
An airspring having a rigid piston, a rigid upper retainer and a flexible membrane sealingly attached to said piston and said upper retainer to form a working cavity therebetween, characterized in that the airspring is further comprised of a height control device according to any of claims 1 to 7.
References Cited (Backward Citations)
No citation records indexed.
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