US3868844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic arterial blood pressure simulator
Assignee: Individual
•
Filing: 1973-05-11
•
Granted: 1975-03-04
•
Expires: 1993-05-11
Abstract
Abstract A dynamic arterial blood pressure simulator is disclosed comprising a pressure chamber, a flexible member in the wall of the chamber, a cam having a shape proportionate to at least one hypothetical arterial blood pressure cycle, and means for driving the cam to displace the flexible member producing a variable pressure within the chamber. The pressure is delivered to an appropriate sensing apparatus for proving or calibrating such apparatus.
Inventors
- 👤 Burton Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:46
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/0215; A61B5/02156
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
80 words
A dynamic arterial blood pressure simulator comprising in combination: a. a pressure chamber having an outlet port; b. a flexible member within one wall of said chamber; c. cam means in communication with said flexible member for depressing said member into said chamber, said cam means having a shape proportionate to at least one hypothetical arterial blood pressure cycle; and d. drive means for rotating said cam for producing a variable pressure proportionate to said cycle at said outlet port.
Claim 2
Dependent Claim
80 words
A dynamic arterial blood pressure simulator comprising in combination: a. a pressure chamber having an outlet port; b. a flexible member within one wall of said chamber; c. cam means in communication with said flexible member for depressing said member into said chamber, said cam means having a shape proportionate to at least one hypothetical arterial blood pressure cycle; and d. drive means for rotating said cam for producing a variable pressure proportionate to said cycle at said outlet port.
Claim 3
Dependent Claim
12 words
The apparatus of claim 1 wherein said flexible member comprises a bellows.
Claim 4
Dependent Claim
13 words
The apparatus of claim 1 wherein said flexible member comprises a rubber diaphram.
Claim 5
Dependent Claim
28 words
The apparatus of claim 3 including pressurizing means for pressurizing said chamber to a base pressure and gauge means communicating with said chamber for measuring said base pressure.
Claim 6
Dependent Claim
13 words
The apparatus of claim 4 wherein said pressurizing means comprises a rubber bulb.
Claim 7
Dependent Claim
12 words
The apparatus of claim 5 wherein said gauge means comprises a manometer.
Claim 8
Dependent Claim
58 words
The apparatus of claim 6 including a cam follower assembly positioned between said cam and said diaphram, said assembly comprising in combination: a. a thrust arm; b. a platten attached to one end of said rod in contact with said diaphram; and c. a rotatable bearing at the opposite end of said rod in contact with said cam.
Claim 9
Dependent Claim
15 words
The apparatus of claim 7 wherein said drive means comprises a variable speed electric motor.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |