US3651804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping apparatus
Assignee: Individual
•
Filing: 1969-12-03
•
Granted: 1972-03-28
•
Expires: 1989-12-03
Abstract
Abstract An artificial respirator including a pump assembly, a piston of which is connected to a first axially movable rod, a second axially movable rod, pivotal lever means interconnecting the rods, the pivot point of said lever means being adjustable to effect variation in the volume of gas pumped by the pump means, a second lever pivotally connected to the second rod, an adjustable fulcrum for the second lever and a rotary link operatively connected to the second lever whereby upon rotation of the link movement is imparted to the second rod, the fulcrum point of the second lever being adjustable to vary the timing of the forward and return motion of the pump means.
Inventors
- 👤 Adrian Leonard Spiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/0057; A61M16/0072
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
160 words
An artificial respirator comprising in combination a pump mechanism including an expansible and contractible working chamber, means whereby the working chamber may be connected to a patient, further means whereby the working chamber may be connected to a source of gas, a first axially movable rod operably connected to the pump mechanism, a second axially movable rod disposed in spaced substantially parallel relationship to the first rod, a first lever acting intermediate said rods, a first adjustable fulcrum for the first lever whereby the extent of axial movement of the first rod for a given axial movement of the second rod can be adjusted, a second lever pivotally connected to the second rod, a second adjustable fulcrum for said second lever and a driven rotary arm having sliding connection with said second lever and the arrangement being that variation of said second fulcrum will effect variation in the ratio of the times of forward and reverse movement of the rods.
Claim 2
Dependent Claim
160 words
An artificial respirator comprising in combination a pump mechanism including an expansible and contractible working chamber, means whereby the working chamber may be connected to a patient, further means whereby the working chamber may be connected to a source of gas, a first axially movable rod operably connected to the pump mechanism, a second axially movable rod disposed in spaced substantially parallel relationship to the first rod, a first lever acting intermediate said rods, a first adjustable fulcrum for the first lever whereby the extent of axial movement of the first rod for a given axial movement of the second rod can be adjusted, a second lever pivotally connected to the second rod, a second adjustable fulcrum for said second lever and a driven rotary arm having sliding connection with said second lever and the arrangement being that variation of said second fulcrum will effect variation in the ratio of the times of forward and reverse movement of the rods.
Claim 3
Dependent Claim
24 words
A respirator as claimed in claim 1 in which the fulcra are adjustable along lines normal to the direction of movement of the rods.
Claim 4
Dependent Claim
22 words
A respirator as claimed in claim 2 in which the driven rotary arm is mounted on the output shaft of a motor.
Claim 5
Dependent Claim
30 words
A respirator as claimed in claim 2 in which the fulcra are defined by bushes through which the levers pass, the bushes being pivotally mounted upon adjustably mounted support plates.
Claim 6
Dependent Claim
20 words
A respirator as claimed in claim 1 in which the pump mechanism includes a piston reciprocably mounted within a cylinder.
Claim 7
Dependent Claim
21 words
A respirator as claimed in claim 5 including a valve controlled inlet and a valve controlled outlet passage to said cylinder.
Claim 8
Dependent Claim
73 words
A respirator as claimed in claim 6 including a further valve which is closed during the delivery of gas through the outlet passage and which is opened during flow of gas through the inlet passage, said further valve being connected in series with said outlet passage, a branch passage being provided from said outlet passage intermediate said valve and said further valve for connection to the windpipe of the person to be ventilated.
Claim 9
Dependent Claim
28 words
A respirator as claimed in claim 7 in which said further valve is a solenoid valve, switch means being provided to control the operation of said further valve.
Claim 10
Dependent Claim
24 words
A respirator as claimed in claim 8 including a restrictor in said outlet passage for controlling the flow of gas through said further valve.
Claim 11
Dependent Claim
31 words
A respirator as claimed in claim 9 in which said restrictor is adjustable to afford varying restriction to the flow of gas during the flow of gas through the inlet passage.
Claim 12
Dependent Claim
21 words
A respirator as claimed in claim 10 in which the restrictor is controlled by a cam movable with said second rod.
References Cited (Backward Citations)
US1311035A
Cited
US1120673A
Cited
US1213302A
Cited
US1572918A
Cited
US2398520A
Cited
US3142185A
Cited
US3193208A
Cited
US3443521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |