Munster Simms Engineering Limited

Robert Stanley McFarland

Michael Evason

Norman Andrew Logan

Stephen Macauley

Richard William Henry Kee

A diaphragm pump comprises a two part casing formed of a front cover () and a back cover (). A diaphragm plate () extends across the covers () and is secured therebetween when the covers () are fastened together. The diaphragm plate () has a plurality of similarly defined circular regions (). The front cover () has substantially axially aligned inlet and outlet ports (), each leading to mutually exclusive inlet and outlet chambers () respectively. A valve housing () is securable inside the front cover () and has defined therein an outlet dished valve seat () with a correspondingly concave resilient valve () seated therein. The outlet valve seat () has fluid passages therethrough. A plurality of inlet valve seats () is provided, equal in number to the number of regions, each being similarly dished and having a correspondingly concave resilient valve () seated therein. Each inlet valve seat () has fluid passages therethrough. The outlet valve () is in fluid communication with the outlet chamber () and the inlet valves () are in fluid communication with the inlet chamber (). A wobble plate () is positioned in the back cover () and has a central boss () and a plurality of similar piston sections () equal in number to the number of circular regions () on the diaphragm plate (). The piston sections () and circular regions () are correspondingly secured together. The wobble plate () is subject to nutating motion to cause reciprocating action by the circular regions () and provide a pumping action.

Diaphragm pump including a wobble plate

A pipe connection has a coupling with one or more socket ends, the or each of which is defined by a circumferential wall surround in which a plurality of four spaced apertures are provided. An annular seal is provided at the inner end of the or each socket end. A collet is provided for location in the or each socket end, the or each collet has a corresponding plurality of four spaced resiliently mounted legs. The legs are co-parallel with the axis of the collet and has similar barb portions each to enter and be held in a corresponding aperture of the respective socket end whereby to hold the collet and therefore the seal in portion in the or each socket end.

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Northern Ireland, United Kingdom

Robert Stanley McFarland