×

Water treatment apparatus

  • US 7,796,011 B2
  • Filed: 09/09/2004
  • Issued: 09/14/2010
  • Est. Priority Date: 09/26/2003
  • Status: Active Grant
First Claim
Patent Images

1. A water treatment apparatus programmable pass key and a water treatment apparatus for reading the pass key when the pass key is in communication with the apparatus, the pass key being separable from the water treatment apparatus and be physically held and operable by a user during use, the water treatment apparatus being a stand-alone unit that configured to receive and be activated by one or more external pass keys, the pass key comprising a data carrier programmed with one or more predetermined codes, each code relating to an operation in or of the water treatment apparatus;

  • the pass key being connectable to the water treatment apparatus from outside the unit without the removal of any components of the water treatment apparatus;

    wherein one of the codes is programmed to allow the user to service the water treatment apparatus after the pass key communicates with the water treatment apparatus and prevents servicing without the pass key first having been in communication with the water treatment apparatus.

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