US 11,939,993 B2
Overflow vortex transfer system
Mark A. Bright, Sewickley, PA (US); Jason Tetkoskie, Cleveland Heights, OH (US); Richard S. Henderson, Solon, OH (US); Herbert L Ritchie, Jr., Macedonia, OH (US); and Jorge A. Morando, Solon, OH (US)
Assigned to PYROTEK, INC., Spokane, WA (US)
Filed by PYROTEK, INC., Spokane, WA (US)
Filed on Nov. 29, 2021, as Appl. No. 17/537,137.
Application 17/537,137 is a continuation of application No. 15/298,349, filed on Oct. 20, 2016, granted, now 11,187,233.
Application 15/298,349 is a continuation of application No. 13/378,078, granted, now 9,506,346, previously published as PCT/US2010/038597, filed on Jun. 15, 2010.
Claims priority of provisional application 61/187,457, filed on Jun. 16, 2009.
Prior Publication US 2022/0082101 A1, Mar. 17, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F04D 7/06 (2006.01); B22D 17/20 (2006.01); B22D 17/30 (2006.01); F01D 5/12 (2006.01); F04D 1/14 (2006.01); F04D 13/06 (2006.01); F04D 29/22 (2006.01); F04D 29/42 (2006.01); F04D 29/44 (2006.01)
CPC F04D 7/065 (2013.01) [B22D 17/2015 (2013.01); B22D 17/30 (2013.01); F01D 5/12 (2013.01); F04D 1/14 (2013.01); F04D 13/06 (2013.01); F04D 29/22 (2013.01); F04D 29/426 (2013.01); F04D 29/445 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A molten metal pump comprising an elongated straight-walled non-parabolic chamber having a base end and a top end, a shaft disposed within said chamber and an impeller rotatable by said shaft, said impeller disposed proximate said base end, said chamber having an intermediate width diameter at least 1.1 times a diameter of the impeller, said base end including an inlet located on a lower most wall of the chamber and said top end including an outlet, wherein said inlet is vertically aligned with a longitudinal axis of said shaft, wherein a distance between said inlet and said outlet is at least three times a height of said impeller, and wherein a bearing surface is provided between a radial edge of the impeller and the inlet.