Patent US4044324A successfully refreshed from Google Patents.
US4044324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil compressed plunger cavity components for a wet type solenoid
Assignee: LUCAS LEDEX Inc
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Filing: 1976-04-30
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Granted: 1977-08-23
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Expires: 1996-04-30
Abstract
Abstract A wet plunger solenoid is formed with a three-piece spool assembly including a base and a hub joined by a nonmagnetic sleeve. An electric coil is wound directly onto the sleeve to compress the sleeve about the telescopically interfitted base and hub parts to form a fluid-tight joint, thus forming an armature or plunger cavity which has high resistance to deformation when fluid pressure is applied to the interior. A fluid-tight joint is formed which is free of threaded connections and is reinforced by reason of the fact that the coil is wound in tension, and the cumulative compression effectively joins the parts into a unitary structure.
Inventors
- 👤 George Thom. Coors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:44
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
126 words
In a wet plunger solenoid in which an armature moves within a spool assembly defining an armature cavity subject to extreme hydraulic pressure from within, the improvement for reinforcing said assembly comprising a magnetic base having an inside surface forming at least an axial portion of the wall of said cavity, a sleeve of non-magnetic material fitted in telescopic relation to at least an axial portion of said base and having an outside coil receiving surface, a pole having a portion thereof telescopically received within said sleeve, and an electric coil wound in tension directly on said sleeve outside surface to cause said sleeve to be compressed about said base and pole for increasing the resistance of said assembly against deformation due to hydraulic pressure within.
Claim 2
Dependent Claim
126 words
In a wet plunger solenoid in which an armature moves within a spool assembly defining an armature cavity subject to extreme hydraulic pressure from within, the improvement for reinforcing said assembly comprising a magnetic base having an inside surface forming at least an axial portion of the wall of said cavity, a sleeve of non-magnetic material fitted in telescopic relation to at least an axial portion of said base and having an outside coil receiving surface, a pole having a portion thereof telescopically received within said sleeve, and an electric coil wound in tension directly on said sleeve outside surface to cause said sleeve to be compressed about said base and pole for increasing the resistance of said assembly against deformation due to hydraulic pressure within.
Claim 3
Dependent Claim
22 words
The solenoid of claim 1 in which said sleeve defines a portion of said cavity axially between said base and said pole.
Claim 4
Dependent Claim
13 words
The solenoid of claim 1 in which said sleeve is formed of brass.
Claim 5
Dependent Claim
54 words
The solenoid of claim 1 in which said base is formed with a radial portion in abutment with one end of said sleeve and in which said pole is formed with a radial portion in abutment with the opposite end of said sleeve, said radial portions defining with said sleeve an annular coil cavity.
Claim 6
Dependent Claim
164 words
A wet plunger type solenoid comprising a non-ferrous generally tubular sleeve having an outer coil-receiving surface, a base formed of magnetic material telescopically received on an inside surface of said sleeve and having a shoulder extending radially outwardly of said sleeve forming one radial wall of a coil cavity, a pole of magnetic material telescopically received on said sleeve in spaced relation to said base and having a shoulder extending radially outwardly of said sleeve forming a second wall of a coil cavity, said pole and base having inside diameters defining an armature cavity subject to fluid pressure, an armature axially movable in said cavity, and an electric coil having turns wound in tension directly on said sleeve coil-receiving outer surface between said shoulders, said sleeve being compressed by said coil into firm engagement with said base and said pole forming fluid tight joints at the telescopic portions therebetween, and resisting deflection by reason of the application of fluid pressure to said coil cavity.
Claim 7
Dependent Claim
164 words
A wet plunger type solenoid comprising a non-ferrous generally tubular sleeve having an outer coil-receiving surface, a base formed of magnetic material telescopically received on an inside surface of said sleeve and having a shoulder extending radially outwardly of said sleeve forming one radial wall of a coil cavity, a pole of magnetic material telescopically received on said sleeve in spaced relation to said base and having a shoulder extending radially outwardly of said sleeve forming a second wall of a coil cavity, said pole and base having inside diameters defining an armature cavity subject to fluid pressure, an armature axially movable in said cavity, and an electric coil having turns wound in tension directly on said sleeve coil-receiving outer surface between said shoulders, said sleeve being compressed by said coil into firm engagement with said base and said pole forming fluid tight joints at the telescopic portions therebetween, and resisting deflection by reason of the application of fluid pressure to said coil cavity.
Claim 8
Dependent Claim
29 words
The solenoid of claim 5 in which said base and said pole are axially spaced and said sleeve is formed with an intermediate portion bridging the axial space therebetween.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |