Clow Rotary Water Pump, Patent Model

This model was submitted to the U.S. Patent Office with the application for the patent issued to C. N. Clow, of Port Byron, New York, July 1, 1856, no. 15221.
The model represents a cam pump in which two smooth elliptical cams run in contact in a casing, which is roughly a horizontal figure-eight in cross section. The cams are made to revolve together correctly by means of gear wheels on the outside of the casing on the same shafts to which the cams are attached. The pitch line of the gears correspond in shape to the elliptical peripheries of the cams. The pump is operated by a hand crank.
This description comes from the 1939 Catalog of the Mechanical Collections of the Division of Engineering United States Museum Bulletin 173 by Frank A. Taylor.
Currently not on view
Object Name
rotary pump, model
patent model, pump, rotary
date made
patent date
Clow, Charles N.
Physical Description
cast iron (overall material)
overall: 7 1/2 in x 4 1/8 in x 4 1/2 in; 19.05 cm x 10.4775 cm x 11.43 cm
place made
United States: New York
associated place
United States: New York, Port Byron
ID Number
catalog number
accession number
patent number
See more items in
Work and Industry: Mechanical and Civil Engineering
Industry & Manufacturing
Bulletin 173
Engineering, Building, and Architecture
Data Source
National Museum of American History, Kenneth E. Behring Center
Related Publication
Frank A. Taylor. Catalog of the Mechanical Collections of the Division of Engineering United States National Museum, Bulletin 173

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