公开(公告)号：AU2011338574B2

公开(公告)日：2015-07-09

申请号：AU2011338574

申请日：2011-12-06

Applicant: GENERAL COMPRESSION INC

Inventor： HAUER ISTVAN ,  INGERSOLL ERIC D ,  ABORN JUSTIN A ,  BLIESKE MATTHEW

IPC: F15B15/10

Abstract: An apparatus can include a piston movably disposed within a pressure vessel and defines a first interior region and a second interior region. The piston has a first position in which the first interior contains a gas having a first pressure and has a volume greater than the second interior region, and a second position in which the second interior region contains a gas having a second pressure and has a volume greater than the first interior region. A seal member is attached to the piston and to the pressure vessel. The seal member has a first configuration in which at least a portion of the seal member is disposed at a first position when the piston is in its first position, and a second configuration in which the portion of the seal member is disposed at a second position when the piston is in its second position.