09920774 is referenced by 6 patents and cites 17 patents.

A system includes a hydraulic energy transfer system configured to exchange pressures between a first fluid and a second fluid. The system also includes a motor system configured to power the hydraulic energy transfer system and a shaft coupling the motor system and the hydraulic energy transfer system. Additionally, the system includes a shaft seal disposed about the shaft. Further, the system includes a pressure compensator configured to reduce a pressure differential across the shaft seal.

Title
Pressure exchange system with motor system and pressure compensation system
Application Number
15/240755
Publication Number
9920774 (B2)
Application Date
August 18, 2016
Publication Date
March 20, 2018
Inventor
Patrick William Morphew
San Leandro
CA, US
Mark Richter
Orinda
CA, US
Adam Rothschild Hoffman
San Francisco
CA, US
Alexander Patrick Theodossiou
San Francisco
CA, US
David D Anderson
Castro Valley
CA, US
Jeremy Grant Martin
Oakland
CA, US
Farshad Ghasripoor
Berkeley
CA, US
Agent
Fletcher Yoder P C
Assignee
ENERGY RECOVERY
CA, US
IPC
E21B 43/267
E21B 43/26
F04F 13/00
F04F 99/00
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