×

Induction type automatic-controlled fluid faucet

  • US 4,948,090 A
  • Filed: 09/27/1989
  • Issued: 08/14/1990
  • Est. Priority Date: 09/27/1989
  • Status: Expired due to Fees
First Claim
Patent Images

1. In an induction type automatically controlled fluid faucet having a valve body including a fluid inlet port, a fluid outlet port, a valve chamber interposed between said inlet port and said outlet port, a valve in said valve chamber for controlling flow from said inlet port to said outlet port, said valve having a valve seat and a valve member extending across said valve seat and dividing said valve chamber into an inlet side and an outlet side, said valve member being movable into and out of engagement with said valve seat to prevent and to permit flow between said inlet port and said outlet port, said valve member having a control port therein communicating between said inlet side and said outlet side of said valve chamber, and a valve stem mounted in said inlet side of said valve chamber for reciprocation into and out of engagement with said control port of said valve member, said valve member being moved by fluid pressure within said inlet side of said valve chamber into engagement with said valve seat when said valve stem is moved into engagement with said control port;

  • improved means for controlling the reciprocal movement of said valve stem, wherein;

    said valve stem comprises an elongated body having one end composed of magnetic material and the other end thereof composed of non-magnetic material, said valve stem body being mounted in said valve chamber with said non-magnetic end adjacent said control port of said valve member for axial reciprocation into and out of engagement with said control port;

    a first permanent magnet assembly having a central bore therein, said first magnet assembly being mounted with said central bore thereof coaxially aligned with the path of reciprocation of said valve stem body and adjacent said magnetic end of valve stem body when said non-magnetic end of said valve stem body is in engagement with said control port;

    a first electromagnetic solenoid mounted coaxially along the path of reciprocation of said valve stem body near the end of said path remote from said control port, said magnetic end of said valve stem body extending partially within said first solenoid when said valve stem body is at said end of said path;

    a second permanent magnet extending axially into said first solenoid from the end thereof opposite the end of entry of said valve stem body into said first solenoid; and

    current control means connected to the winding of said first solenoid and adapted to apply a first momentary electric current to said winding of said first solenoid in a first direction to cause said first solenoid to generate a magnetic field attracting said valve stem body to enter said first solenoid and moving said non-magnetic end of said valve stem body out of engagement with said control port,said control current means being further adapted to apply a second momentary electric current to said winding of said first solenoid in a direction opposite to said first direction to cause said first solenoid to generate a magnetic field repelling said valve stem body away from said first solenoid and moving said non-magnetic end of said valve stem body into engagement with said control port,said valve stem body being held within said first solenoid by said second permanent magnet after the end of said first current,said non-magnetic end of said valve stem body being held in engagement with said control port by the action of said first permanent magnet on said magnetic end of said valve stem body after the end of said second current.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×