Patent ID: 8651141
Filing Date: 2014-02-18
Classification: F16K,Y10T

Abstract:
1. Electromagnetic valve comprising a tubular casing, having a longitudinal axis, suitable for acting as support structure for the electromagnetic valve, said tubular casing including a first end and a second end, the first end housing a powering body provided with a powering hole, and the second end housing a discharging body provided with a discharging hole, at least one pair of pneumatic connections provided in a lateral wall of the tubular casing for obtaining the pneumatic uses of the electromagnetic valve, a coil to generate a magnetic field, said coil being placed in a housing compartment provided in the tubular casing between said first and second ends, said coil defining a central seat coaxial to the coil and to said longitudinal axis, a mobile nucleus, positioned coaxially to said coil, made of ferromagnetic material to be influenced by said magnetic field, and mobile between two working positions in which it interfaces with said powering and discharging holes, and elastic means suitable for elastically influencing the mobile nucleus in its working stroke, wherein the mobile nucleus extends the entire length of the coil in order to selectively open and close said powering and discharging holes, sliding axially within the seat of the coil, said tubular casing is made of ferromagnetic material in order to allow the closure of the flow lines of the magnetic field generated by the coil, said elastic means comprise a disc spring suitable for exercising a purely axial force on the mobile nucleus, the valve comprises a polar expansion member coaxial to the coil and positioned in correspondence with an axial end of the coil, the polar expansion member is in contact with the casing to maintain continuity of the magnetic field flow lines between the mobile nucleus and the casing, and the polar expansion member, opposite the coil, comprises a flaring suitable for creating a seat to contain said elastic means, and a first lateral pneumatic connection is provided at the interface between the powering body and the polar expansion member, a second lateral pneumatic connection is provided at the interface between the discharging body and the coil.