Diaphragm pump having a twist and lock fastener
AssigneeDLP Limited
InventorsRobert William Stimpson, Yanchun Wang
Life of this patent
Estimating the term…
Abstract
A diaphragm pump for a pumped shower waste, comprises a diaphragm housing (12), a diaphragm (34) removably held in the diaphragm housing (12), an openable cover (16) on the diaphragm housing (12) for accessing the diaphragm (34), an electric motor (14), a connecting member (40) positioned in the diaphragm housing (12) and movable by the electric motor (14), and a non-screw-threaded twist and lock fastener (62) which releasably engages the diaphragm (34) with the connecting member (40). The diaphragm (34) can thus be disengaged and removed from the connecting member (40) without the use of a screwdriver.
Claims9
A diaphragm pump for a pumped shower waste, the pump comprising:
- a diaphragm housing,
- a diaphragm removably held in the diaphragm housing, the diaphragm having a diaphragm aperture;
- an openable cover on the diaphragm housing for accessing the diaphragm,
- an electric motor,
- a connecting member positioned in the diaphragm housing and movable by the electric motor, the connecting member having a body, a diaphragm-contacting plate at one end of the body, and a spigot formed centrally on the diaphragm-contacting plate which projects away from the body and is receivable in the diaphragm aperture;
- and
- a non-screw-threaded twist and lock fastener having a generally tubular shaped portion with gripping elements on an outer surface thereof and a diaphragm flange extending radially outwardly from the tubular portion, the spigot of the connecting member being receivable in the tubular shaped portion, whereby the fastener releasably engages and liquid-tightly clamps the diaphragm between the diaphragm flange and the diaphragm plate of the connecting member wherein one of the fastener and connecting member includes at least one radially extending wing element and the remaining one of the fastener and connecting member includes a locking recess for receiving and releasably retaining the wing element so as to enable releasable inter-engagement of the fastener and the connecting member by rotation of the tubular portion in an appropriate direction.
Dependencies are inferred from the claim text.