Solenoid device with stable activation
OwnerAnthony Freakesinventor
Life of this patent
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Abstract
A solenoid may include a core having a junction surface; a plunger having a junction surface and located adjacent to the core; a shading ring located proximate to an interface between the core junction surface and the plunger junction surface, the shading ring having an outside diameter slightly smaller than the diameter of the core, and operable to produce a concentration of magnetic attraction within an annular range of the interface between a center of the interface and a location of the shading ring; wherein a contact region between the core junction surface and the plunger junction surface is substantially smaller than the respective junction surfaces and located proximate to the annular range of the concentration of magnetic attraction.
Claims13
A solenoid comprising:
- a core having a junction surface;
- a plunger having a junction surface and located proximate to the core;
- a shading ring located proximate to an interface between the core junction surface and the plunger junction surface, the shading ring having an outside diameter slightly smaller than the diameter of the core, and operable to produce a concentration of magnetic attraction within an annular range of the interface between a center of the interface and a location of the shading ring;
- wherein one of the core junction surface or the plunger junction surface is substantially flat and the other of the core junction surface or the plunger junction surface has a concavity formed therein such that an annular contact region is formed at the interface between the core junction surface and the plunger junction surface which is substantially smaller than the respective junction surfaces and is located proximate to the annular range of the concentration of magnetic attraction.
A solenoid comprising:
- a core assembly fixed within the solenoid and having a junction surface;
- a plunger moveable within the solenoid and having a junction surface;
- a shading ring located proximate to an interface between the core assembly junction surface and the plunger junction surface, the shading ring having an outside diameter slightly smaller than the diameter of the core and operable to produce a concentration of magnetic attraction at the interface between the plunger junction surface and the core assembly junction surface within an annular range of the interface between a center of the interface and a radial position of an inner diameter of the shading ring;
- wherein one of the core junction surface or the plunger junction surface is substantially flat and substantially perpendicular to an adjoining side surface thereof and the other of the core junction surface or the plunger junction surface has a conical concavity formed therein such that when the respective junction surfaces are contacted, an annular contact region is formed at the interface such that the contact region between the plunger junction surface and the core assembly junction surface is substantially smaller than the respective junction surfaces and located proximate to the annular range of the concentration of magnetic attraction.
Dependencies are inferred from the claim text.