Patent US3665963A successfully refreshed from Google Patents.
US3665963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic valve
Assignee: Voith Getriebe KG
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Filing: 1970-02-12
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Granted: 1972-05-30
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Expires: 1990-02-12
Abstract
Abstract A magnetic valve in which the valve housing with the casing for the valve spool is made of a magnetically uniform piece while the armature of the magnet and the valve spool are likewise made of a magnetically uniform piece, the magnetic flux being passed from the iron casing into the armature of the magnet through the guiding surfaces between the valve housing and the valve spool. By sufficiently dimensioning the diameter of the valve spool and by sufficiently dimensioning the length of the valve spool and thereby the contacting surface thereof, it is possible to maintain the magnetic flux small so that a magnetic jamming of the valve spool with the harmful consequences thereof cannot occur.
Inventors
- 👤 Heinrich Dick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:23
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0603; F16K31/061; F16K31/0613; F16K11/00; F16K11/10; F16K11/20; F16K11/24; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86879
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
178 words
A magnetically actuated piston valve, which includes: a housing of magnetizable material comprising a valve cylinder means having a cylindrical bore, a piston valve spool having a cylindrical surface area, the piston valve spool being reciprocable in said bore and guided by said cylindrical surface area in said cylindrical bore, at least two openings connected with said bore for a liquid flow to be controlled by said valve cylinder means and said piston valve spool, magnetic coil means arranged within said housing and defining a central passage aligned with and adjacent to said cylindrical bore, armature means reciprocable in said passage, said housing forming a single and magnetically uniform piece, said piston valve spool and said armature means also forming a single unitary magnetically uniform piece, said cylindrical bore of said valve cylinder means and the cylindrical surface area of said piston valve spool forming the only paired surfaces for guidance of said piston valve spool and armature means and simultaneously forming the only paired surfaces for transfer of magnetic flux from said housing to said armature means.
Claim 2
Dependent Claim
178 words
A magnetically actuated piston valve, which includes: a housing of magnetizable material comprising a valve cylinder means having a cylindrical bore, a piston valve spool having a cylindrical surface area, the piston valve spool being reciprocable in said bore and guided by said cylindrical surface area in said cylindrical bore, at least two openings connected with said bore for a liquid flow to be controlled by said valve cylinder means and said piston valve spool, magnetic coil means arranged within said housing and defining a central passage aligned with and adjacent to said cylindrical bore, armature means reciprocable in said passage, said housing forming a single and magnetically uniform piece, said piston valve spool and said armature means also forming a single unitary magnetically uniform piece, said cylindrical bore of said valve cylinder means and the cylindrical surface area of said piston valve spool forming the only paired surfaces for guidance of said piston valve spool and armature means and simultaneously forming the only paired surfaces for transfer of magnetic flux from said housing to said armature means.
Claim 3
Dependent Claim
74 words
A magnetically actuated piston valve according to claim 1, in which that surface area of said piston valve spool which contacts and is guided by said cylindrical bore is, during the operation of said valve, at least of such dimensions that during the energization of said coil means, the induction conveyed to said piston valve spool through the gap between said cylindrical bore and said piston valve spool does not exceed approximately 1,000 Gauss.
Claim 4
Dependent Claim
31 words
A magnetically actuated piston valve according to claim 1, in which said piston valve spool has two axially spaced cylindrical control sections and a plunger section interconnecting said cylindrical control sections.
Claim 5
Dependent Claim
22 words
A magnetically actuated piston valve according to claim 1, in which said piston valve spool consists of a magnetically well conductive steel.
Claim 6
Dependent Claim
23 words
A magnetically actuated piston valve according to claim 4, in which only a thin peripheral layer of said cylindrical control sections is hardened.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |