title: Piston for Pneumatic Pumps.
creator: Robinson, Charles H.
contributor: Connor, K. M.
contributor: Wynne, G. A.
contributor: Norris Peters Co.
publisher: United States. Patent Office.
date: 1891-03-31
language: English
description: Patent for improvements in pistons for pneumatic pumps by using a
 combination of a tubular shell, a cylindrical valve, a conical aperture and a
 conical projection to fulfill the conditions required of a piston in pumps.
 Illustration is included.
subject: Inventions
subject: Science and Technology - Tools
subject: conical engagements
coverage: United States - Texas - Walker County - Huntsville
rights: Public Domain
type: Patent
format: [1], 2 p. : ill. ; 23 cm.
format: Text
identifier: pat-no: 449333
identifier: https://texashistory.unt.edu./ark:/67531/metapth172653/
identifier: ark: ark:/67531/metapth172653