Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1991-04-04
1992-09-01
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335258, 25112915, H01F 708, F16K 3102
Patent
active
051442728
ABSTRACT:
An electromagnetic solenoid for oil hydraulic control valves including an oil flow notch on a magnetic sleeve bearing; an axially extending oil flow notch on a nonmagnetic stopper washer; an oil flow gap between a movable iron core and an operating rod; and an axially extending oil flow notch on the operating rod so that oil can flow easily and freely by movement of a movable iron core and the operating rod. Since the profiles of the notches are simple and the operation rod is uniform in outer diameter, the solenoid can be formed easily and inexpensively, with additional advantages of improved magnetic property and response.
REFERENCES:
patent: 4677409 (1987-06-01), Kozuka et al.
patent: 4778147 (1988-10-01), Kozuka et al.
Broome Harold
Mitsubishi Denki K.K.
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