EP 0244290 B1 19910123 - PRESSURE SWITCH WITH TWO INVERSE THRESHOLDS
Title (en)
PRESSURE SWITCH WITH TWO INVERSE THRESHOLDS
Publication
Application
Priority
FR 8605376 A 19860415
Abstract (en)
[origin: US4778963A] The invention relates to a pressure switch comprising an insulating housing fitted with contact tabs and receiving moving contact members, a conductive washer, and a membrane subjected to pressure. The pressure switch includes two moving insulating members (15, 19), two contact members (16, 20), two associated springs (17, 21), and a pusher (14) which is conductive and in contact with the membrane. The fixed conductive washer (11) has a central hole through which a cylindrical projection provided on one of the insulating moving members (15) passes, with a rod on the pusher (14) sliding inside said cylindrical projection so that the insulating moving members (15, 19), the contact members (16, 20), and the associated springs (17, 21) are all disposed on the same side of the fixed conductive washer which therefore constitutes one end of the cavity (9) in the insulating housing. The invention is applicable to monitoring and providing warnings concerning pressure variations going beyond one or other of two predetermined thresholds, and in particular to monitoring hydraulic circuits in vehicles provided for lubrication or for braking purposes. These thresholds may respectively indicate that the pressure is too low or too high.
IPC 1-7
IPC 8 full level
H01H 35/26 (2006.01); H01H 35/34 (2006.01)
CPC (source: EP US)
H01H 35/2657 (2013.01 - EP US); H01H 35/34 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES GB IT
DOCDB simple family (publication)
EP 0244290 A1 19871104; EP 0244290 B1 19910123; BR 8701821 A 19880126; DE 3767551 D1 19910228; ES 2019951 B3 19910716; FR 2597257 A1 19871016; FR 2597257 B1 19880805; US 4778963 A 19881018
DOCDB simple family (application)
EP 87400832 A 19870413; BR 8701821 A 19870415; DE 3767551 T 19870413; ES 87400832 T 19870413; FR 8605376 A 19860415; US 3764587 A 19870413