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Expired
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Henry Hawkins
Samuel Henry Hawkins
John Rimmer
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Aeration Devices For Treatment Of Activated Polluted Sludge
(AREA)
Structures Of Non-Positive Displacement Pumps
(AREA)
Abstract
28,237. Hawkins, H., Hawkins, S. H., and Rimmer, J. June 26,1909. Screw pumps.- Comprises improvements in propellers for air and liquid pumps, &c., and consists in forming the blades A dished and of conical form. The sides of the cone are straight, and the apex is slightly rounded. The blades are set at an angle to the shaft and are supported by a rib a well behind the forward edge a<1>.
GB190828237D1909-06-261909-06-26Improvements in or relating to Propellers.
ExpiredGB190828237A
(en)