Hewitt Piston-Rod Packing, Patent Model

Hewitt Piston-Rod Packing, Patent Model

<< >>
This model was submitted to the U.S. Patent Office with the application for the patent issued to John Hewitt, of St. Louis, Missouri, June 3, 1879, no. 216038.
The model represents a 2-piece, flange-and-gland stuffing box of the usual form, packed with malleable metal rings with beveled edges. The rings are alternately beveled in opposite directions so that adjoining surfaces match. The edges of the flange and gland are beveled so that when the parts are brought together and tightened the effect is of a number of double wedges sliding together and expanding between the stuffing box and the shaft.
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
piston rod packing, model
patent model, piston rod packing
Object Type
Patent Model
date made
patent date
Hewitt, John
place made
United States: Missouri
associated place
United States: Missouri, St. Louis
Physical Description
brass (overall material)
overall: 3 in x 4 in x 7 in; 7.62 cm x 10.16 cm x 17.78 cm
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
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.


Add a comment about this object