The Gorman-Rupp Company

John K Cartwright

Eddie Cottrell

David W Oswalt

A pump for chopping solid material in a liquid stream having a volute housing, a rotating cutter with at least one blade parallel to a rotational axis of the rotating cutter, an impeller arranged at an outer circumference of the rotating cutter, and a stationary cutter having at least one blade parallel to the rotational axis of the rotating cutter. The stationary cutter is concentric with the rotating cutter, and the stationary cutter, the rotating cutter and the impeller are all at least partially housed within the volute housing. Typically, the rotating cutter has a different number of blades than the stationary cutter. Optionally, the pump, further comprises an inspection cover that is removably attached to the pump, and has an opening large enough to remove the stationary cutter and the rotating cutter from the volute housing.

Chopper pump

A vacuum assisted pump priming system which includes a vacuum chamber communicating with a pump inlet via a transfer passage. A valve assembly within the vacuum chamber controls the communication of a vacuum source with the chamber. The valve assembly includes a semi-cylindrical valve body having a plurality of ports by which the vacuum source is communicated with the vacuum chamber. A closure element, attached to a float, is operative to block the vacuum ports when the float rises above a predetermined level in the vacuum chamber in response to liquid entering the chamber. A lost motion connection is established between the float and the valve body, which enables the float to rise above the predetermined level, while the closure element maintains its blocking relationship with the ports. The float includes an enlarge portion that acts as a defuser and a tamper portion which is received in the transfer passage and is operative to dislodge matter drawn into the transfer passage. The float may include extension portions which act as shields and occupy additional volume in the vacuum chamber in order to reduce the liquid level rise in the chamber. The valve body and closure element may be arranged at a predetermined angle to promote drainage and a shield overlies the transfer passage to inhibit the entry of solids into the vacuum chamber. A two-stage eductor assembly is used to provide cooling for a seal chamber forming part of the pump.

Growing community of inventors

Newark, OH, United States of America

John K Cartwright