Patents Assigned to Dema Engineering Co.
  • Patent number: 5797420
    Abstract: This proportioner (10) is used in conjunction with a water supply connector (12) to provide a fluid mixing device for water and liquid detergent. The proportioner (10) includes a valve body (20) providing an inlet nozzle (14) and an air gap chamber (15) and an outlet (18) housing a venturi system (16). The venturi system (16) includes a venturi nozzle (40) aligned with the inlet nozzle (14) and having deflecting flats (42), a venturi tube (46) and a venturi throat (52) communicating with a detergent induction fitting (50).
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: August 25, 1998
    Assignee: Dema Engineering Co.
    Inventors: Michael L. Nowicki, Paul E. Naslund
  • Patent number: 5518020
    Abstract: This proportioner (10) is used in conjunction with a water supply connector (12) to provide a fluid mixing device for water and liquid detergent. The proportioner (10) includes a valve body (20) providing an inlet nozzle (14) and an air gap chamber (15) and an outlet (18) housing a venturi system (16). The venturi system (16) includes a venturi nozzle (40) aligned with the inlet nozzle (14) and having deflecting flats (42), a venturi tube (46) and a venturi throat (52) communicating with a detergent induction fitting (50).
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: May 21, 1996
    Assignee: Dema Engineering Co.
    Inventors: Michael L. Nowicki, Paul E. Naslund
  • Patent number: 5141016
    Abstract: This diverter valve (12) is used in conjunction with a faucet (14) and provides for partial diversion of the water supply to a chemical block feeder (20). The diverter valve includes a body 24 having an inlet (26) an outlet 28 and a connecting intermediate passage (32). A transverse diverter passage (42) on one side of the body 24 communicates with the intermediate passage (32) and the diverter passage is closed by an aligned plunger (50) mounted to the opposite side of the body (24). The plunger (50) is withdrawn from its closure position by pulling outwardly and is maintained in the open position by water pressure to partially divert water into the diverter passage (42) to supply diluted chemical into a sink (16).
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: August 25, 1992
    Assignee: Dema Engineering Co.
    Inventor: Michael L. Nowicki
  • Patent number: 4815634
    Abstract: A vacuum actuated chemical dispenser. The dispenser includes a chemical chamber and a vacuum chamber. The dispenser further includes a chemical chamber piston and a vacuum chamber piston located and movable within their respective chambers. A coil spring associated with the pistons returns the pistons to a pre-vacuum actuated position. The pistons are adjustable in order to adjust the measured amount of chemical to be dispensed from the chemical chamber.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: March 28, 1989
    Assignee: Dema Engineering Co.
    Inventor: Michael L. Nowicki
  • Patent number: 4276001
    Abstract: A fluid pump assembly having a body provided with a fluid chamber and a passage having an orifice, the passage connecting the chamber to a conduit carrying a pressurized flow of fluid. Pump apparatus has an inlet connected to a fluid additive supply, and an outlet which communicates with the conduit for feeding the fluid additive to the conduit. Control apparatus includes a dump passage communicating with the chamber and has a cross section larger than the orifice. A dump valve controls the flow of fluid through the dump passage to regulate the fluid pressure in the fluid chamber, and motor apparatus operatively connects the pump apparatus and the dump valve. The motor apparatus is responsive to the fluid pressure in the fluid chamber for operating the dump valve and actuating the pump apparatus to pump fluid additive through the outlet.
    Type: Grant
    Filed: January 15, 1979
    Date of Patent: June 30, 1981
    Assignee: Dema Engineering Co.
    Inventor: Lambert Holmes