NEW PUMP: UTILIZES A “CONTINUOUS” PISTON

The NEW GOODYEAR PUMP now being produced by Goodyear Pumps Ltd., Cambourne, Cornwall, a subsidiary of Holman Bros. Ltd. claims a truly amazing performance. Invented by the Cornishman, James W. Goodyear, who has had over 20 years' experience of hydraulics, it makes use of a ‘continuous’ piston. The pump is a continuous, self‐priming, self‐lubricating one, of positive axial‐flow employing a screw rotor of entirely new form. The screw engages with a rotating plate to produce a pulseless action that is virtually positive. In fact, rotor and plate are the only moving parts and since the rotor spins on its true centres there is no tendency to roll around and rub against the surrounding rubber stator which can often be troublesome with this type of conventional pump, The rotor shaft is supported on roller bearings which are protected by lip seals. The rotor can turn in either direction so that direction of flow can be chosen at will. Mechanical face seals running on ground and lapped surfaces seal the shaft, and a chamber between seals and bearings is vented to atmosphere to prevent build‐up of fluid pressure.