Water cover arrangement for a solenoid apparatus

Details Water cover arrangement for a solenoid apparatus Water cover arrangement for a solenoid apparatus

1989-07-05

1990-04-10

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

277212FB, 74 182, H01F 700

Patent

active

049164236

ABSTRACT:
A solenoid apparatus comprising a solenoid case having an open end and a closed end, an electromagnetically movable plunger mounted in the solenoid case, and a substantially cup-shaped flexible-water-tight boot surrounding a plunger end portion projecting from the open end of the solenoid case and connected to the open end of the solenoid case, the flexible boot having a bottom wall central portion intimately secured to an end face of the plunger end portion. The flexible water-tight boot is provided with an air-vent hole which is closed when the plunger is outwardly extended from the solenoid case and which is opened when the plunger is retracted into the solenoid case due to the deformation of the flexible boot at its wall portion upon the movement of the plunger.

REFERENCES:
patent: 4535998 (1985-08-01), Katz
patent: 4635489 (1987-01-01), Imamura et al.

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