Patent US3898017A successfully refreshed from Google Patents.
US3898017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump
Assignee: Individual
•
Filing: 1973-04-16
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Granted: 1975-08-05
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Expires: 1993-04-16
Abstract
Abstract Disclosed is an improved device for pumping fluids, i.e. gasses and liquids. The pump comprises a substantially enclosed chamber having ingress and egress means for the substance being pumped. Within the chamber is a gas which may or may not be the substance being pumped. Means are provided to heat the gas. Means are provided for selective activation of the heating means. Heating causes expansion of the gas forcing the substance through the egress means. Means, such as mechanical valves or duct constrictions, are provided in some embodiments to restrict upstream flow.
Inventors
- 👤 Harold Mandroian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:15
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/725; F; F04; F04B; F04B19/00; F04B19/20; F04B19/24; F04B53/00; F04B53/10; F04B53/1077; F04F; F04F1/00; F04F1/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
A pump, comprising: a substantially enclosed chamber containing a gaseous substance, said chamber having ingress and egress means for the fluid to be pumped thereby; means to restrict ingress through said egress means; means to restrict egress through said ingress means; means within said chamber including a metallic ribbon which upon the passage of electrical current there through will become activated to heat the gaseous substance contained in said chamber, said heating means adapted, upon activation thereof, to heat substantially only that portion of the gaseous substance which is sufficiently displaced from that fluid to be pumped so that the temperature of the fluid will remain substantially unaffected by said activation; and means to intermittently provide electrical current flow through said ribbon to activate said heating means.
Claim 2
Dependent Claim
127 words
A pump, comprising: a substantially enclosed chamber containing a gaseous substance, said chamber having ingress and egress means for the fluid to be pumped thereby; means to restrict ingress through said egress means; means to restrict egress through said ingress means; means within said chamber including a metallic ribbon which upon the passage of electrical current there through will become activated to heat the gaseous substance contained in said chamber, said heating means adapted, upon activation thereof, to heat substantially only that portion of the gaseous substance which is sufficiently displaced from that fluid to be pumped so that the temperature of the fluid will remain substantially unaffected by said activation; and means to intermittently provide electrical current flow through said ribbon to activate said heating means.
Claim 3
Dependent Claim
130 words
A pump comprising: a substantially enclosed chamber containing a gaseous substance, said chamber having ingress and egress means for the fluid to be pumped thereby; means in said egress means to restrict ingress through said egress means including a tube, at least a portion of which has a progressively decreasing internal cross-sectional area along the direction away from the interior of said chamber; means to restrict egress through said ingress means; means to heat the gaseous substance contained in said chamber, said heating means adapted, upon activation thereof, to heat substantially only that portion of the gaseous substance which is sufficiently displaced from the fluid to be pumped so that the temperature of the fluid will remain substantially unaffected by said activation; and means to intermittently activate said heating means.
Claim 4
Dependent Claim
130 words
A pump comprising: a substantially enclosed chamber containing a gaseous substance, said chamber having ingress and egress means for the fluid to be pumped thereby; means in said egress means to restrict ingress through said egress means including a tube, at least a portion of which has a progressively decreasing internal cross-sectional area along the direction away from the interior of said chamber; means to restrict egress through said ingress means; means to heat the gaseous substance contained in said chamber, said heating means adapted, upon activation thereof, to heat substantially only that portion of the gaseous substance which is sufficiently displaced from the fluid to be pumped so that the temperature of the fluid will remain substantially unaffected by said activation; and means to intermittently activate said heating means.
Claim 5
Dependent Claim
129 words
A pump, comprising: a substantially enclosed chamber containing a gaseous substance, said chamber having ingress and egress means for the fluid to be pumped thereby; means to restrict ingress through said egress means; means in said ingress means to restrict egress through said ingress means including a tube, at least a portion of which has a progressively decreasing internal cross-sectional area along the direction toward the interior of said chamber; means to heat the gaseous substance contained in said chamber, said heating means adapted, upon activation thereof, to heat substantially only that portion of the gaseous substance which is sufficiently displaced from the fluid to be pumped so that the temperature of the fluid will remain substantially unaffected by said activation; and means to intermittently activate said heating means.
Claim 6
Dependent Claim
129 words
A pump, comprising: a substantially enclosed chamber containing a gaseous substance, said chamber having ingress and egress means for the fluid to be pumped thereby; means to restrict ingress through said egress means; means in said ingress means to restrict egress through said ingress means including a tube, at least a portion of which has a progressively decreasing internal cross-sectional area along the direction toward the interior of said chamber; means to heat the gaseous substance contained in said chamber, said heating means adapted, upon activation thereof, to heat substantially only that portion of the gaseous substance which is sufficiently displaced from the fluid to be pumped so that the temperature of the fluid will remain substantially unaffected by said activation; and means to intermittently activate said heating means.
Claim 7
Dependent Claim
15 words
Pump as in claim 2, wherein a plurality of said tubes is provided in series.
Claim 8
Dependent Claim
15 words
Pump as in claim 3, wherein a plurality of said tube is provided in series.
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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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |