US3603706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic micropump for processing aggressive liquid substances
Assignee: Individual
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Filing: 1969-03-25
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Granted: 1971-09-07
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Expires: 1989-03-25
Abstract
Abstract An electromagnetic micropump for processing aggressive liquid substances detrimental for human health, such as, for example, radioactive solutions, or the like. The micropump, is fully compact, explosion proof and packingless. Its pumping element is constituted by an electromagnet core adapted to reciprocate along a stationary piston between a pair of jacketed alternately energized solenoids.
Inventors
- 👤 Antonin Cermak
- 👤 Slavomir Michalek
- 👤 Zdenek Strait
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/14; F04B17/00; F04B17/03; F04B17/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
An electromagnetic pump comprising a cylinder having opposite closed ends; fluid inlet and outlet passage means respectively communicating with said opposite ends of said cylinder; a hollow electromagnetic core arranged with clearance in said cylinder for reciprocating movement in axial direction, said core having a closed end and being formed with a bore extending in axial direction from the other end into said core; a pair of one way valves located outside of said core respectively in said inlet and outlet passage means; a stationary piston slidably received in said bore; and electromagnet means cooperating with said core for reciprocating the same in said cylinder so that during reciprocation of said core fluid will flow exclusively through the clearance between said cylinder and said core from said inlet to said outlet passage means, said pump performing its pumping stroke during movement of said core in a direction in which a portion of said stationary piston moves out of said bore and its suction stroke during movement of said core in the opposite direction in which said portion of said stationary piston moves again into said bore.
Claim 2
Dependent Claim
186 words
An electromagnetic pump comprising a cylinder having opposite closed ends; fluid inlet and outlet passage means respectively communicating with said opposite ends of said cylinder; a hollow electromagnetic core arranged with clearance in said cylinder for reciprocating movement in axial direction, said core having a closed end and being formed with a bore extending in axial direction from the other end into said core; a pair of one way valves located outside of said core respectively in said inlet and outlet passage means; a stationary piston slidably received in said bore; and electromagnet means cooperating with said core for reciprocating the same in said cylinder so that during reciprocation of said core fluid will flow exclusively through the clearance between said cylinder and said core from said inlet to said outlet passage means, said pump performing its pumping stroke during movement of said core in a direction in which a portion of said stationary piston moves out of said bore and its suction stroke during movement of said core in the opposite direction in which said portion of said stationary piston moves again into said bore.
Claim 3
Dependent Claim
36 words
A pump as defined in claim 1, wherein said bore in said core, said stationary piston, said inlet and said outlet passage means are aligned along a common axis coinciding with the axis of said cylinder.
Claim 4
Dependent Claim
49 words
A pump as defined in claim 2, wherein said bore in said hollow core is constituted by the inner surface of a tube integral at one end with said other end of said core, said tube communicating at the other end thereof with the interior of said hollow core.
Claim 5
Dependent Claim
34 words
A pump as defined in claim 2, wherein said electromagnet means comprise a pair of solenoid means arranged spaced in the direction of said axis in the region of opposite ends of said cylinder.
Claim 6
Dependent Claim
22 words
A pump as defined in claim 4, wherein said inlet and outlet passage means extend respectively through said pair of solenoid means.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |