#$%^&*AU2013257424A120131128.pdf#####Abstract A pump for applying reduced pressure to a tissue site. The pump comprises a casing having a top portion and a bottom portion. A first chamber is disposed within the casing. The first chamber has a variable volume. A second chamber is disposed within the casing. The 5 second chamber has a fixed volume. A hydrophobic filter is arranged between the first chamber and the second chamber and is configured to prevent liquid transfer from the second chamber to the first chamber. The top portion of the casing is configured to slide relative to the bottom portion of the casing to move the first chamber between a compressed position and an uncompressed position. 0 FIG. 11/11 165 100 122 102 120 125 127 143 130 1160 Pressure 135 feedback 10155 system 145-1 105 FIG. 1
