US4510935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cardiac defibrillator
Assignee: Cardiac Recorders Ltd
•
Filing: 1982-09-30
•
Granted: 1985-04-16
•
Expires: 2002-09-30
Abstract
Abstract An electrical energy source, particularly suitable for portable emergency equipment such as cardiac defibrillators, uses a small explosive charge of which the energy is converted into a short intense electrical pulse by an electromechanical convertor for example a piezoelectric transducer.
Inventors
- 👤 Joseph Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:25
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/18
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
88 words
An electrical energy source comprising: (a) a chamber with which at least one piezoelectric transducer is operatively associated; (b) an explosive cartridge associated with said chamber for generating gases therein in response to actuation of said cartridge; (c) a member movably mounted in said chamber for displacement relative to the transducer in response to said gases; and (d) means on said member for repeatedly striking said transducer when said member is displaced in the chamber by said gases thereby causing the transducer to produce a train output pulses.
Claim 2
Dependent Claim
88 words
An electrical energy source comprising: (a) a chamber with which at least one piezoelectric transducer is operatively associated; (b) an explosive cartridge associated with said chamber for generating gases therein in response to actuation of said cartridge; (c) a member movably mounted in said chamber for displacement relative to the transducer in response to said gases; and (d) means on said member for repeatedly striking said transducer when said member is displaced in the chamber by said gases thereby causing the transducer to produce a train output pulses.
Claim 3
Dependent Claim
33 words
An electrical energy source according to claim 1 including a rectifier for rectifying the electrical output of the transducer when the latter is repeatedly struck by displacement of said member in said chamber.
Claim 4
Dependent Claim
19 words
An electrical energy source according to claim 2 including a cardiac defibrillator connected to the output of the rectifier.
Claim 5
Dependent Claim
23 words
An electrical energy source according to claim 3 including an electrical filter interposed between the cardiac defibrillator and the output of the rectifier.
Claim 6
Dependent Claim
30 words
An electrical energy source according to claim 1 wherein said member is rotatably mounted in the chamber and is constructed and arranged so that said gases angularly displace said member.
Claim 7
Dependent Claim
27 words
An electrical energy source according to claim 5 wherein said member is provided with blades against which said gases react for imparting angular displacement to the member.
Claim 8
Dependent Claim
31 words
An electrical energy source according to claim 6 wherein the periphery of said blades is corrugated, the peaks of the corrugations physically striking said transducer during angular displacement of the member.
Claim 9
Dependent Claim
17 words
An electrical energy source according to claim 6 including a plurality of transducers mounted on said chamber.
Claim 10
Dependent Claim
33 words
An electrical energy source according to claim 1 wherein said member is cylindrical and is longitudinally slidable in said chamber, and is constructed and arranged so that said gases axially displace said member.
Claim 11
Dependent Claim
32 words
An electrical energy source according to claim 9 wherein the outer surface of said member is corrugated, the peaks of the corrugations physically striking said transducer during axial displacement of the member.
Claim 12
Dependent Claim
17 words
An electrical energy source according to claim 10 including a plurality of transducers mounted on said chamber.
Claim 13
Dependent Claim
20 words
An electrical energy source according to claim 11 wherein said transducers are angularly spaced from each other on the chamber.
Claim 14
Dependent Claim
20 words
An electrical energy source according to claim 11 wherein said transducers are axially spaced from each other on the chamber.
Claim 15
Dependent Claim
101 words
A cardiac defibrillator system comprising: (a) a cardiac defibrillator; (b) an energy source for said defibrillator including a replaceable cartridge for generating gases in response to actuation of said cartridge; and (c) means responsive to said gases for generating power for said defibrillator including a chamber to which said gases are applied, at least one piezoelectric transducer operatively associated with said chamber, a member movably mounted in said chamber for displacement relative to said transducer in response to said gases, and means on said member for repeatedly striking said transducer when said member is displaced in said chamber by said gases.
Claim 16
Dependent Claim
101 words
A cardiac defibrillator system comprising: (a) a cardiac defibrillator; (b) an energy source for said defibrillator including a replaceable cartridge for generating gases in response to actuation of said cartridge; and (c) means responsive to said gases for generating power for said defibrillator including a chamber to which said gases are applied, at least one piezoelectric transducer operatively associated with said chamber, a member movably mounted in said chamber for displacement relative to said transducer in response to said gases, and means on said member for repeatedly striking said transducer when said member is displaced in said chamber by said gases.
Claim 17
Dependent Claim
18 words
A cardiac defibrillator according to claim 14 including a rectifier circuit for rectifying the output of said transducer.
Claim 18
Dependent Claim
18 words
A cardiac defibrillator system according to claim 15 including a filter for filtering the output of said rectifier.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |