US4189936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure generator
Assignee: Individual
•
Filing: 1978-10-13
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Granted: 1980-02-26
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Expires: 1998-10-13
Abstract
Abstract A variable volume pressure wave generator including a drive magnet; a low mass, drive coil for energization by an electrical analog of a pressure wave to be simulated and driven by interaction with a magnet; a low mass, high compliance drive coil suspension for supporting the coil relative to the magnet; a piston interconnected and driven with the drive coil; a pressure chamber having an opening for receiving the piston; a flexible, inelastic, diaphragm sealingly engaged with the piston and with the chamber; and passage means extending from the chamber for external connection.
Inventors
- 👤 David M. Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:52
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/0215; A61B5/02158; G; G01; G01L; G01L27/00; G01L27/002; G01L27/005; A61B5/02108
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
A pressure measuring system comprising: a high compliance pressure generator for producing a predetermined pressure variation pattern; a reference pressure transducer connected directly to said pressure generator for directly sensing the pressure produced therein; a test pressure transducer connected through tubing to said pressure generator for sensing the pressure transmitted through said tubing from said pressure generator; and a pressure monitor responsive to said test transducer to indicate the pressure sensed through said tubing and responsive to said reference transducer to indicate the pressure sensed directly at said pressure generator for determining the difference in the pressure variation pattern introduced by the tubing.
Claim 2
Dependent Claim
103 words
A pressure measuring system comprising: a high compliance pressure generator for producing a predetermined pressure variation pattern; a reference pressure transducer connected directly to said pressure generator for directly sensing the pressure produced therein; a test pressure transducer connected through tubing to said pressure generator for sensing the pressure transmitted through said tubing from said pressure generator; and a pressure monitor responsive to said test transducer to indicate the pressure sensed through said tubing and responsive to said reference transducer to indicate the pressure sensed directly at said pressure generator for determining the difference in the pressure variation pattern introduced by the tubing.
Claim 3
Dependent Claim
97 words
The system of claim 1 in which said pressure generator includes a drive magnet; a low mass, drive coil for energization by an electrical analog of a pressure wave to be simulated and driven by interaction with said magnet; a low mass, high compliance drive coil system for supporting said coil relative to said magnet; a piston interconnected and driven with said drive coil; a pressure chamber having an opening for receiving said piston; an inelastic, flexible diaphragm sealingly engaged with said piston and with said chamber; and passage means extending from said chamber for external connection.
Claim 4
Dependent Claim
14 words
The system of claim 2 in which said diaphragm is a rolling seal diaphragm.
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) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |