US3554204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for determining the rate change of pressure
Assignee: Corning Glass Works
•
Filing: 1967-10-20
•
Granted: 1971-01-12
•
Expires: 1987-10-20
Abstract
Abstract A rate of change of pressure detector employing an open loop circuit where the control nozzles of a proportional fluid amplifier are connected to a pressure source, whose rate of change of pressure is to be measured, by a pair of passages one of which is longer than the other. The pressure at the pressure source is differentiated to provide a pressure difference at the outlets of the pr
Inventors
- 👤 Robert H Bellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:37
CPC Classifications
G; G01; G01L; G01L7/00; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2065
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
130 words
A system for determining the rate of change of pressure comprising: a proportional fluid amplifier having a power stream nozzle, a pair of control nozzles, and a pair of outlets; a pressure source; a first passage intermediate said pressure source and one of said control nozzles to transmit fluid from said pressure source to said one of said control nozzles; and a second passage intermediate said pressure source and the other of said control nozzles to transmit fluid from said pressure source to said other of said control nozzles, said second passage being longer than said first passage, the pressure difference Delta Po at said outlets of said proportional fluid amplifier being a function of the rate of change of pressure at said pressure source in accordance with the equation
Claim 2
Independent Claim
130 words
A system for determining the rate of change of pressure comprising: a proportional fluid amplifier having a power stream nozzle, a pair of control nozzles, and a pair of outlets; a pressure source; a first passage intermediate said pressure source and one of said control nozzles to transmit fluid from said pressure source to said one of said control nozzles; and a second passage intermediate said pressure source and the other of said control nozzles to transmit fluid from said pressure source to said other of said control nozzles, said second passage being longer than said first passage, the pressure difference Delta Po at said outlets of said proportional fluid amplifier being a function of the rate of change of pressure at said pressure source in accordance with the equation
Claim 3
Dependent Claim
19 words
The system of claim 1 further comprising pressure sensing means connected to the outlets of said proportional fluid amplifier.
Claim 4
Dependent Claim
11 words
The system of claim 2 wherein said means is a gauge.
Claim 5
Dependent Claim
21 words
The system of claim 1 wherein said first and second passages are connected to said pressure source at the same point.
Claim 6
Dependent Claim
19 words
The system of claim 4 further comprising pressure sensing means connected to the outlets of said proportional fluid amplifier.
Claim 7
Dependent Claim
21 words
The system of claim 1 wherein said first and second passages are connected to said pressure source at different spaced points.
Claim 8
Dependent Claim
19 words
The system of claim 6 further comprising pressure sensing means connected to the outlets of said proportional fluid amplifier.
References Cited (Backward Citations)
US3159168A
Cited
US3238959A
Cited
GB1002089A
Cited
US3266510A
Cited
US3333596A
Cited
US3379204A
Cited
US3413996A
Cited
US3474959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |