Patent US3768931A successfully refreshed from Google Patents.
US3768931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically actuated pump with flexible membrane
Assignee: Individual
•
Filing: 1973-01-22
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Granted: 1973-10-30
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Expires: 1993-01-22
Abstract
Abstract An electromagnetic pump which utilizes a plurality of electromagnets to alternately repel and attract a corresponding plurality of permanent magnets mounted on a flexible membrane which forms the pumping chamber.
Inventors
- 👤 F Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:30
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054; F04B43/0063; A; A61; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/196; A61M60/40; A61M60/424; A61M60/457; A61M60/462; A61M60/50; A61M60/508; A61M60/515; A61M60/80; A61M60/855; A61M60/89; A61M60/894; F04B43/02; F04B43/04; F04B43/08; A61M60/126; A61M60/148; A61M60/20; A61M60/247; A61M60/253; A61M60/268
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
83 words
A chamber pump comprising: 1. a flexible bag which defines a fluid containing chamber; 2. inlet and outlet unidirectional fluid valve means fluidly coupled to said flexible bag chamber; 3. means forming a plurality of magnetic poles on the exterior surface of said flexible bag; 4. rigid support means surrounding at least a portion of said flexible bag; 5. a plurality of magnetic means positioned on said support means for generating magnetic fields which interact with the magnetic fields of said magnetic poles.
Claim 2
Dependent Claim
83 words
A chamber pump comprising: 1. a flexible bag which defines a fluid containing chamber; 2. inlet and outlet unidirectional fluid valve means fluidly coupled to said flexible bag chamber; 3. means forming a plurality of magnetic poles on the exterior surface of said flexible bag; 4. rigid support means surrounding at least a portion of said flexible bag; 5. a plurality of magnetic means positioned on said support means for generating magnetic fields which interact with the magnetic fields of said magnetic poles.
Claim 3
Dependent Claim
14 words
inlet and outlet unidirectional fluid valve means fluidly coupled to said flexible bag chamber;
Claim 4
Dependent Claim
14 words
inlet and outlet unidirectional fluid valve means fluidly coupled to said flexible bag chamber;
Claim 5
Dependent Claim
4 words
A chamber pump comprising:
Claim 6
Dependent Claim
4 words
A chamber pump comprising:
Claim 7
Dependent Claim
14 words
inlet and outlet unidirectional fluid valve means fluidly coupled to said flexible bag chamber;
Claim 8
Dependent Claim
14 words
inlet and outlet unidirectional fluid valve means fluidly coupled to said flexible bag chamber;
Claim 9
Dependent Claim
15 words
means forming a plurality of magnetic poles on the exterior surface of said flexible bag;
Claim 10
Dependent Claim
15 words
means forming a plurality of magnetic poles on the exterior surface of said flexible bag;
Claim 11
Dependent Claim
15 words
means forming a plurality of magnetic poles on the exterior surface of said flexible bag;
Claim 12
Dependent Claim
15 words
means forming a plurality of magnetic poles on the exterior surface of said flexible bag;
Claim 13
Dependent Claim
24 words
The pump of claim 2 further characterized by said energizing means energizing said electromagnetic means to cause repulsion between said electromagnetic and magnetic fields.
Claim 14
Dependent Claim
12 words
rigid support means surrounding at least a portion of said flexible bag;
Claim 15
Dependent Claim
12 words
rigid support means surrounding at least a portion of said flexible bag;
Claim 16
Dependent Claim
28 words
The pump of claim 2 further characterized by said energizing means cyclically energizing said electromagnetic means to alternately cause attraction and repulsion between said electromagnetic and magnetic fields.
Claim 17
Dependent Claim
12 words
rigid support means surrounding at least a portion of said flexible bag;
Claim 18
Dependent Claim
12 words
rigid support means surrounding at least a portion of said flexible bag;
Claim 19
Dependent Claim
24 words
a plurality of magnetic means positioned on said support means for generating magnetic fields which interact with the magnetic fields of said magnetic poles.
Claim 20
Dependent Claim
24 words
a plurality of magnetic means positioned on said support means for generating magnetic fields which interact with the magnetic fields of said magnetic poles.
Claim 21
Dependent Claim
25 words
a plurality of electromagnetic means positioned on said support means for generating electromagnetic fields which interact with the magnetic fields of said magnetic poles; and,
Claim 22
Dependent Claim
25 words
a plurality of electromagnetic means positioned on said support means for generating electromagnetic fields which interact with the magnetic fields of said magnetic poles; and,
Claim 23
Dependent Claim
28 words
The pump of claim 2 wherein said means forming a plurality of magnetic poles on the exterior surface of the flexible bag comprises a plurality of permanent magnets.
Claim 24
Dependent Claim
6 words
means for energizing said electromagnetic means.
Claim 25
Dependent Claim
6 words
means for energizing said electromagnetic means.
Claim 26
Dependent Claim
24 words
The pump of claim 2 further characterized by said outlet unidirectional fluid valve means being pre-loaded to open when a predetermined pressure is reached.
References Cited (Backward Citations)
US2930324A
Cited
US2971471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |