Davey Products Pty Ltd.

Hugh Barr McDonald

David Da-Wei Zhang

A seal arrangement for an impeller assembly, the impeller assembly including an impeller housing () adapted to receive a drive shaft. An impeller () is located within the impeller housing () 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 () located axially between the impeller housing () and the impeller () to provide a substantially fluid tight seal between the impeller housing () and the impeller ().

Impeller sealing arrangement

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.

Growing community of inventors

Boronia, Australia

Hugh Barr McDonald