US3900822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportional solenoid
Assignee: LUCAS LEDEX Inc
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Filing: 1974-03-12
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Granted: 1975-08-19
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Expires: 1994-03-12
Abstract
Abstract Proportional single and double acting solenoids are disclosed of the type in which a conical pole piece becomes selectively saturated at locations opposite the armature. These solenoids are subject to side loading and the alignment and centering of the armature shaft is achieved by providing the bearing housings and adjacent bases with matching interfitting tapers to reduce or eliminate side loads on the armature shaft by assuring concentricity. The solenoids also have improved heat transfer by the use of a coil form in the shape of a spool or bobbin made of aluminum, in which one of the radial end walls is provided with a channel or groove in which the magnet leads and the external lead-in wires are connected and mechanically protected, so that the full radial surface of the side wall may be used for heat conduction without air gaps. High temperature silicone grease is employed at the interfaces of the coil, the base, the hub, and the case to improve the efficiency of heat transfer.
Inventors
- 👤 David R Hardwick
- 👤 George T Coors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:04
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/13; H01F7/16; H01F7/1607; H01F7/081; H01F2007/085
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
168 words
For use with double and single acting solenoids, the combination comprising an annular hub having an abutment portion defining a radial wall and a cylindrical sleeve portion, a base axially spaced from said hub, means on said base forming an annular pole portion and having means defining a second radial wall in axially spaced relation to said hub wall, a cylindrical axially extended armature, means mounting said armature for axial movement within said hub, an electrical coil assembly including a spool-shaped coil form made essentially of high heat conductive material, said coil form having an inside surface received on said hub sleeve portion and having radial end faces in respective heat transferring abutment with said hub and base walls, an electrical coil wound on said form, and one end of said coil form having means defining a radially outwardly opening channel proportioned to receive the magnet wire of said coil and to receive the external power leads therein providing a space for electrical connection with said coil wires.
Claim 2
Dependent Claim
168 words
For use with double and single acting solenoids, the combination comprising an annular hub having an abutment portion defining a radial wall and a cylindrical sleeve portion, a base axially spaced from said hub, means on said base forming an annular pole portion and having means defining a second radial wall in axially spaced relation to said hub wall, a cylindrical axially extended armature, means mounting said armature for axial movement within said hub, an electrical coil assembly including a spool-shaped coil form made essentially of high heat conductive material, said coil form having an inside surface received on said hub sleeve portion and having radial end faces in respective heat transferring abutment with said hub and base walls, an electrical coil wound on said form, and one end of said coil form having means defining a radially outwardly opening channel proportioned to receive the magnet wire of said coil and to receive the external power leads therein providing a space for electrical connection with said coil wires.
Claim 3
Dependent Claim
199 words
A proportional solenoid comprising an annular hub having an abutment portion defining a radial wall, a base axially spaced from said hub, means on said base forming an annular pole portion extending axially toward said hub and having means defining a second radial wall in axially spaced relation to said hub wall, a cylindrical axially extended armature, means mounting said armature for axial movement within said hub and base, an electrical coil assembly including a spool-shaped coil form made essentially of high heat conductive material, said coil form having an inside surface received in heat transfer relation on said hub and having radial end faces in respective heat transferring abutment with said hub and base walls, an electrical coil wound on said form, said form having means therein defining a circumferential outwardly-spacing channel formed in one end of said form and proportioned to receive the magnet wire of said coil and to receive the external power leads thereon providing a space for electrical connections with said coil wires, and high temperature grease at the interfaces between said coil form and said hub and base to eliminate air gaps and to improve the heat transfer rate from said coil assembly.
Claim 4
Dependent Claim
199 words
A proportional solenoid comprising an annular hub having an abutment portion defining a radial wall, a base axially spaced from said hub, means on said base forming an annular pole portion extending axially toward said hub and having means defining a second radial wall in axially spaced relation to said hub wall, a cylindrical axially extended armature, means mounting said armature for axial movement within said hub and base, an electrical coil assembly including a spool-shaped coil form made essentially of high heat conductive material, said coil form having an inside surface received in heat transfer relation on said hub and having radial end faces in respective heat transferring abutment with said hub and base walls, an electrical coil wound on said form, said form having means therein defining a circumferential outwardly-spacing channel formed in one end of said form and proportioned to receive the magnet wire of said coil and to receive the external power leads thereon providing a space for electrical connections with said coil wires, and high temperature grease at the interfaces between said coil form and said hub and base to eliminate air gaps and to improve the heat transfer rate from said coil assembly.
Claim 5
Dependent Claim
151 words
In proportional solenoids including an armature mounted on an elongated axially extending shaft and further including an annular hub and at least one axially spaced annular base surrounding said armature, said base and hub defining a path for movement of said armature, in which said armature is subject to side-loading due to magnetic lines of force between said armature and said base, the improvement in shaft mounting and centering means comprising a bearing housing, a bearing positioned centrally of said housing for supporting one end of said shaft for axial movement, said bearing housing having a wall portion defined by an external inwardly-facing annular taper, means on said base defining an internal outwardly-facing annular taper proportioned to mate with said housing taper, and means joining said bearing housing and said base with said tapers in mating relation to maintain a condition of concentricity of said armature with respect to said base.
Claim 6
Dependent Claim
151 words
In proportional solenoids including an armature mounted on an elongated axially extending shaft and further including an annular hub and at least one axially spaced annular base surrounding said armature, said base and hub defining a path for movement of said armature, in which said armature is subject to side-loading due to magnetic lines of force between said armature and said base, the improvement in shaft mounting and centering means comprising a bearing housing, a bearing positioned centrally of said housing for supporting one end of said shaft for axial movement, said bearing housing having a wall portion defined by an external inwardly-facing annular taper, means on said base defining an internal outwardly-facing annular taper proportioned to mate with said housing taper, and means joining said bearing housing and said base with said tapers in mating relation to maintain a condition of concentricity of said armature with respect to said base.
Claim 7
Dependent Claim
39 words
The improvement of claim 3 further comprising a second said base axially spaced from said one base, and a second said bearing housing in mating relation thereto and having a bearing therein receiving the other end of said shaft.
Claim 8
Dependent Claim
65 words
The improvement of claim 3 further comprising a second said bearing housing member, means in said hub defining an internal, outwardly-facing taper proportioned to mate with the external taper on said second bearing housing, said second bearing housing having a bearing therein receiving the other end of said shaft, and means joining said second housing to said base with the tapers thereof in mating relation.
Claim 9
Dependent Claim
191 words
A double acting proportional solenoid comprising a hub having a symmetrically annular sleeve portion and a generally centrally positioned radial portion, a pair of electrical coil assemblies mounted on said sleeve portion respectively on opposite axial sides of said radial portion, a pair of axially-spaced bases having radial body portions in abutment with one of said coil assemblies, and each said base having an inwardly-extending annular tapered pole portion terminating in an apex spaced from said hub sleeve portion forming an air gap therebetween, a cylindrical armature mounted within said hub having opposite ends in interfitting relation to said pole portions so that selective energization of either of said coil assemblies will create a force tending to urge said armature axially in one direction or the other with respect to said bases, means on said armature defining an axially extending shaft, means mounting said armature shaft concentrically on said Bases including a correspondiing pair of bearing housings, means on said housings and said bases defining cooperating mating concentric tapers, and bearings in said housings engaging said shaft adjacent the ends thereof and supporting said shaft and armature for said axial movement.
Claim 10
Dependent Claim
191 words
A double acting proportional solenoid comprising a hub having a symmetrically annular sleeve portion and a generally centrally positioned radial portion, a pair of electrical coil assemblies mounted on said sleeve portion respectively on opposite axial sides of said radial portion, a pair of axially-spaced bases having radial body portions in abutment with one of said coil assemblies, and each said base having an inwardly-extending annular tapered pole portion terminating in an apex spaced from said hub sleeve portion forming an air gap therebetween, a cylindrical armature mounted within said hub having opposite ends in interfitting relation to said pole portions so that selective energization of either of said coil assemblies will create a force tending to urge said armature axially in one direction or the other with respect to said bases, means on said armature defining an axially extending shaft, means mounting said armature shaft concentrically on said Bases including a correspondiing pair of bearing housings, means on said housings and said bases defining cooperating mating concentric tapers, and bearings in said housings engaging said shaft adjacent the ends thereof and supporting said shaft and armature for said axial movement.
Claim 11
Dependent Claim
142 words
In electric solenoids including an armature on an axially movable shaft and further including a hub and at least one annular base cooperating with said armature to define a circumferential air gap therebetween, said armature being subject to magnetic side-loading upon the occurrence of a lack of concentricity between said armature and said base, the improvement in shaft mounting and centering comprising a bearing housing having means defining a bearing supporting one end of said shaft for axial movement therethrough, said bearing housing having a wall portion defined by an annular taper formed concentrically of said shaft, means on said base defining an annular taper proportioned to interfit and mate with said housing taper, and means joining said bearing housing and said base with said tapers in interfitted relation to maintain a circumferentially constant air gap between said armature and said base.
Claim 12
Dependent Claim
142 words
In electric solenoids including an armature on an axially movable shaft and further including a hub and at least one annular base cooperating with said armature to define a circumferential air gap therebetween, said armature being subject to magnetic side-loading upon the occurrence of a lack of concentricity between said armature and said base, the improvement in shaft mounting and centering comprising a bearing housing having means defining a bearing supporting one end of said shaft for axial movement therethrough, said bearing housing having a wall portion defined by an annular taper formed concentrically of said shaft, means on said base defining an annular taper proportioned to interfit and mate with said housing taper, and means joining said bearing housing and said base with said tapers in interfitted relation to maintain a circumferentially constant air gap between said armature and said base.
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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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |