07900444 is referenced by 60 patents and cites 742 patents.

The invention relates to methods and systems for the storage and recovery of energy using open-air hydraulic-pneumatic accumulator and intensifier arrangements that combine at least one accumulator and at least one intensifier in communication with a high-pressure gas storage reservoir on a gas-side of the circuits and a combination fluid motor/pump, coupled to a combination electric generator/motor on the fluid side of the circuits.

Title
Systems and methods for energy storage and recovery using compressed gas
Application Number
12/945398
Publication Number
7900444 (B1)
Application Date
November 12, 2010
Publication Date
March 8, 2011
Inventor
Benjamin R Bollinger
West Lebanon
NH, US
Troy O McBride
West Lebanon
NH, US
Agent
Bingham McCutchen
Assignee
SustainX
NH, US
IPC
F15B 1/02
F04B 49/00
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