Pressure-sensitive switch unit in resonator assembly of tire pre

Details Pressure-sensitive switch unit in resonator assembly of tire pre Pressure-sensitive switch unit in resonator assembly of tire pre

1980-06-27

1982-09-21

Scott, James R.

Electricity: circuit makers and breakers

Special application

Pneumatic tire inflation responsive

200 83P, H01H 3524

Patent

active

043508545

ABSTRACT:
A pressure-sensitive switch unit forming part of a resonator assembly for use in a tire pressure drop detecting apparatus of the electromagnetic induction type, wherein an atmospheric chamber, formed in a casing structure and hermetically isolated by a diaphragm from a pressure-acting chamber communicating with the tire chamber in a tire-and-wheel assembly, communicates with the atmosphere through contact surfaces of two or three of the component parts of the casing structure and further through a body of a gas-permeable synthetic rubber in part exposed to the atmosphere so that an atmospheric pressure is at all times introduced into the atmosphere atmospheric chamber and an ingress of water and dust into the atmospheric chamber is precluded by the body of the gas-permeable synthetic rubber.

REFERENCES:
patent: 4006327 (1977-02-01), Hayashi et al.
patent: 4071724 (1978-01-01), LeJeune
patent: 4254312 (1981-03-01), Migrin et al.
patent: 4255628 (1981-03-01), Broetto

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