Submerged pumping system
USRE31445E · kind E · reissue
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1977 |
| Grant date | Nov 22, 1983 |
| Priority date | — |
| Expiry date | Oct 19, 1997 |
Classification
- Technology area (CPC —)General
Abstract
A submersible pumping system especially adapted to cryogenic storage systems which includes a single fluid transmitting casing extending from the top to near the bottom of the storage container, a normally closed spring biased foot valve on the bottom of the casing, a sealing gland closing the top of the casing having a shiftable portion, and a pump and motor unit suspended through the shiftable portion of the sealing gland in the casing and adapted to open the foot valve. The pump and motor unit is centered in the casing and aligned with the foot valve by mating frusto-conical collars associated with the pump and motor unit and with the valve assembly. The shiftable sealing gland allows the pump and motor unit to be lifted off the foot valve so as to close the valve without venting the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.