Patent US4451354A successfully refreshed from Google Patents.
Patent US4853689A successfully refreshed from Google Patents.
US4853689A
Expired / Lapsed
US
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Air brake compressor failure warning system
Assignee: Individual
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Filing: 1987-06-25
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Granted: 1989-08-01
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Expires: 2007-06-25
Abstract
Abstract A warning for a vehicular air brake system, which system is powered by air compressed by a rotary compressor. A sensor senses rotation of some part of the compressor, and if a signal respective to rotation is not sensed during a predetermined increment of time, an alarm is caused to alert the operator of an impending lack of compressed air.
Inventors
- 👤 William M. Gray
- 👤 John H. Otteman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:51
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; B60T17/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
128 words
In combination: a vehicular air brake system which includes air pressure actuated brakes and a compressor for supplying compressed air to operate said brakes, said system including a rotary element whose rotation is concurrent with rotation of compression means in the compressor; and warning means comprising: sensor means responsive to rotation of said rotary element, said sensor means being adapted to produce a signal indicative of rotation of said rotary element when said element rotates, timing circuitry responsive to said signal, adapted to determine whether a signal respective to said rotation has or has not been received within a predetermined increment of time, and alarm means adapted to be actuated by said timing circuit if and when such signal is not received within said predetermined increment of time.
Claim 2
Dependent Claim
128 words
In combination: a vehicular air brake system which includes air pressure actuated brakes and a compressor for supplying compressed air to operate said brakes, said system including a rotary element whose rotation is concurrent with rotation of compression means in the compressor; and warning means comprising: sensor means responsive to rotation of said rotary element, said sensor means being adapted to produce a signal indicative of rotation of said rotary element when said element rotates, timing circuitry responsive to said signal, adapted to determine whether a signal respective to said rotation has or has not been received within a predetermined increment of time, and alarm means adapted to be actuated by said timing circuit if and when such signal is not received within said predetermined increment of time.
Claim 3
Dependent Claim
26 words
A combination according to claim 1 in which said sensor means comprises a magnet on said rotary element, and a magnetic pickup responsive to its passage.
Claim 4
Dependent Claim
15 words
A combination according to claim 1 in which said alarm means produces an audible output.
Claim 5
Dependent Claim
15 words
A combination according to claim 1 in which said alarm means produces a visible output.
Claim 6
Dependent Claim
19 words
A combination according to claim 1 in which said rotary element is an air movement portion of the comprssor.
Claim 7
Dependent Claim
30 words
A combination according to claim 5 in which said sensor means comprises a magnet on said rotary element, and a stationary magnetic pickup responsive to the passage of said magnet.
Claim 8
Dependent Claim
24 words
A combination according to claim 5 in which said sensor means comprises an optical pickup responsive to variations in light from said rotary element.
Claim 9
Dependent Claim
23 words
A combination according to claim 1 in which sensor means comprises an optical pickup responsive to variations in light from said rotary element.
Claim 10
Dependent Claim
23 words
A combination according to claim 1 in which said rotary element is a drive shft for an air movement portion of said compressor.
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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |