John Charles Purcell

US Patent:

20090120507, May 14, 2009

Filed:

Nov 14, 2008

Appl. No.:

12/271537

Inventors:

James K. Simonelli - Buford GA, US
John E. Purcell - Commerce GA, US

Assignee:

Roper Pump Company - Commerce GA

International Classification:

G05D 11/02
F04C 2/08
G05D 11/13
G05D 7/00

US Classification:

137 99, 41742314

Abstract:

A fluid metering/pumping device preferably includes a series of intermeshing gears. The fluid metering/pumping device includes an inlet port or area adjacent the intermeshing portion of each pair of gears within the series adjacent the point at which the pair of gears diverge. The device further includes a pressure loaded floating shoe adjacent the intermeshing portion of each pair of gears within the series adjacent the point at which the pair of gears converge. The device further includes a piston subjected to discharge pressure at each discharge port which conveys hydraulic pressure to each floating shoe. The device is configured to convey liquid from a main inlet stream of liquid, through the inlet ports or areas, and out of one or more discharge ports at substantially equal rates.

US Patent:

20140134029, May 15, 2014

Filed:

Nov 13, 2012

Appl. No.:

13/675668

Inventors:

Edmond Coghlan, III - Talmo GA, US
Tyson Bentley Anderson - Watkinsville GA, US
John Eugene Purcell - Commerce GA, US
Zachariah Paul Rivard - Nicholson GA, US

International Classification:

F01C 21/10

US Classification:

418 48, 29888023

Abstract:

A stator for a helical gear device is formed from multiple rigid disks and support rings bonded to the disks. Each disk forms part of a profile consisting of radially equally spaced or opened lobes which interact with the convex portions of rotor lobes. The disks are arranged into a desired helical configuration and bonded to one another to form a disk stack defining a helically convoluted elongated chamber therein. The support rings are fixed concentrically against respective end disks of the disk stack. The rings are sized with an inside diameter substantially equal to the major diameter of the central aperture defined by the radially extending lobes of the rigid disks. As a rotor rotates and nutates inside the helically convoluted elongated chamber of the stator, it is supported at both ends of the disk stack by the support rings touching the tips of the rotor lobes. Thus the full force of the rotor's operational inertia is not borne by the disks alone, thereby increasing their life.