US3833015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic valve
Assignee: Linde GmbH
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Filing: 1972-12-04
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Granted: 1974-09-03
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Expires: 1992-12-04
Abstract
Abstract An electromagnetic valve, especially for the control of lowtemperature fluids such as cryogens, comprising an inner duct preferably of thermally nonconductive material or of a material weldable to the inner duct of a double-wall pipe line, a valve seat within the duct and a magnetically shiftable body movable within the duct into and out of engagement with the valve seat. The inner duct is spacedly surrounded by an outer duct which, in turn, may be surrounded by the electromagnet coil, the space between the ducts forming an insulator between the electromagnet and the valve members. This space is evacuated and/or filled with a thermally insulating material.
Inventors
- 👤 R Kneuer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:47
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0655; F16K31/0651; F16K31/0665; Y; Y10; Y10T; Y10T137/00; Y10T137/6416
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
An electromagnetic valve for a conduit carrying a heattransfer-sensitive fluid, comprising a tube connected in said conduit and traversed by said fluid; means forming a valve seat in said tube; a magnetically shiftable member received in said tube and engageable with said seat; and electromagnetic coil surrounding said tube; means forming a heat-insulating clearance all around said tube and between said tube and said coil for insulating said member from said coil; and means for evacuating said clearance.
Claim 2
Dependent Claim
78 words
An electromagnetic valve for a conduit carrying a heattransfer-sensitive fluid, comprising a tube connected in said conduit and traversed by said fluid; means forming a valve seat in said tube; a magnetically shiftable member received in said tube and engageable with said seat; and electromagnetic coil surrounding said tube; means forming a heat-insulating clearance all around said tube and between said tube and said coil for insulating said member from said coil; and means for evacuating said clearance.
Claim 3
Dependent Claim
29 words
The valve defined in claim 1 wherein said means forming said clearance includes an outer tube coaxially and spacedly surrounding the first-mentioned tube, said coil surrounding said outer tube.
Claim 4
Dependent Claim
38 words
The valve defined in claim 2 wherein said member is generally cylindrical and is coaxially received in said first-mentioned tube, said member being provided along its periphery with a plurality of axially extending grooves traversed by said fluid.
Claim 5
Dependent Claim
21 words
The valve defined in claim 3 wherein said member has an end turned toward said seat and of generally spheroidal configuration.
Claim 6
Dependent Claim
26 words
The valve defined in claim 4, further comprising a coil spring received within said first-mentioned tube and biasing said member in the direction of said seat.
Claim 7
Dependent Claim
25 words
The valve defined in claim 5 wherein said seat is formed from polytetrafluoroethylene and at least said end of said member is composed of steel.
Claim 8
Dependent Claim
30 words
The valve defined in claim 6 wherein said end of said member frustoconically converges in the direction of said seat and is provided with a ball-shaped head composed of steel.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |