Title:
Air unloader for submergible pumps
United States Patent 2917113


Inventors:
Ortman, Earl R.
Application Number:
US72262358A
Publication Date:
12/15/1959
Filing Date:
03/17/1958
Assignee:
Ortman, Earl R.
Primary Class:
Other Classes:
137/209, 166/85.2, 166/88.4
International Classes:
F04D13/16
View Patent Images:
US Patent References:
2807214Pumping system1957-09-24
2787220Pumping system1957-04-02
2657637Pitless well construction1953-11-03