United States Patent 2841092
Inventors:
Whiteman, Irvin R.
Barron, John T.
Publication Date:
07/01/1958
Other Classes:
277/541, 137/512, 277/530, 92/165R, 417/458, 220/288, 92/169.100, 220/259.400
International Classes:
F04B53/00; F04B53/10; F04B53/14; F04B53/16