Patents Assigned to Davey Products Pty Ltd
  • Patent number: 8231342
    Abstract: A multi-impeller arrangement and to a pump having the impeller arrangement. The impeller arrangement or impeller cluster includes at least two impellers, each impeller having an annular back plate and an annular front plate. The impellers are releasably secured together in an axially in-line series having the front plate of a first impeller at one end and the back plate of a second impeller at the other end. The second impeller includes an axial projection which extends from its back plate, through and beyond its front plate to the first impeller. The first impeller is engaged with the projection of the second impeller such that all impellers are rotatable as an assembly.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: July 31, 2012
    Assignee: Davey Products Pty Ltd.
    Inventors: Christopher George Lacey, Mark Andrew Lance
  • Patent number: 7997295
    Abstract: A supplementing water supply controller which provides water from a supplementing water supply to an outlet in preference to a main water supply, wherein if there is insufficient supplementing water to meet demand, the main water supply flows through the controller to the outlet, whereas if there is sufficient supplemental water to meet the demand, a supplementing water pump is activated and the pressure of the supplementing water is raised above a threshold level at which it moves an actuator mounted by two diaphragms to block the main water supply, so that the supplementing water can flow to the outlet. The actuator has a larger effective area at its low pressure end than at its high pressure end, so that the supplementing water threshold pressure level for moving the actuator to block the main water supply is less than the main water pressure.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: August 16, 2011
    Assignee: Davey Products Pty Ltd
    Inventors: Rodney James Brown, Da-Wei Zhang
  • Patent number: 7347674
    Abstract: A fluid pump of the type in which a housing assembly has a first sub-housing having an electric motor therein which is in line with a second sub-housing having the impeller therein, with the motor having a rotor shaft which extends through a seal of the first sub-housing into the second sub-housing and with the impeller mounted on the rotor shaft so as to be rotatable by the motor, and the second sub-housing having inlet and outlet ports through which fluid, such as water, is able to be pumped through the second sub-housing.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: March 25, 2008
    Assignee: Davey Products Pty Ltd
    Inventors: Sean Roderick Terry, Mark Andrew Lance
  • Patent number: 6884037
    Abstract: An impeller assembly includes an impeller which has a pair of plate means adapted for individual connection to a drive shaft for rotation by the drive shaft about an axis, and vane means disposed intermediate the pair of plate means and adapted for rotation with the pair of plate means. The impeller assembly further includes means for applying force parallel to the axis of the impeller to the impeller so as to clamp the pair of plate means and intermediate vane means together.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: April 26, 2005
    Assignee: Davey Products Pty Ltd
    Inventors: Christopher George Lacey, Mark Andrew Lance
  • Patent number: 6837677
    Abstract: A seal arrangement for an impeller assembly, the impeller assembly including an impeller housing (34) adapted to receive a drive shaft. An impeller (10) is located within the impeller housing (34) and is adapted for connection to the drive shaft for rotation by the drive shaft about an axis. The seal arrangement includes an annular seal (24) located axially between the impeller housing (34) and the impeller (10) to provide a substantially fluid tight seal between the impeller housing (34) and the impeller (10).
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: January 4, 2005
    Assignee: Davey Products Pty Ltd
    Inventors: David Da-Wei Zhang, Hugh Barr McDonald
  • Patent number: 5044511
    Abstract: A thin walled membrane type diaphragm particularly for liquid pressure accumulators and a method of production is disclosed comprising membrane made from rubber, synthetic rubber, P.V.C. or like suitable material including a neck portion forming the opening of the diaphragm and adapted to be mounted in the neck of a pressure tank and a closed tank region or body region which is formed from cruciform pleats which may be symmetrical such that the dimension of the body portion is reduced for a given volume of body region.The moulding of the diaphragm in this form enables a diaphragm of greater internal capacity to be moulded in a given sized injection moulding such that the core size of the moulding machine can be readily removed through the base region of the diaphragm.
    Type: Grant
    Filed: April 26, 1990
    Date of Patent: September 3, 1991
    Assignee: Davey Products Pty. Ltd.
    Inventor: Hugh McDonald
  • Patent number: D536006
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: January 30, 2007
    Assignee: Davey Products Pty. Ltd.
    Inventor: Christopher G Lacey
  • Patent number: D541814
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: May 1, 2007
    Assignee: Davey Products PTY Ltd.
    Inventor: Christopher George Lacey