Patent ID: 8007257

Claim:
A manually-activated reduced pressure treatment system comprising: a substantially rigid housing; an end cap slidingly received by the housing; an inner chamber disposed between the end cap and housing, a volume of the inner chamber being variable in amount depending on the position of the end cap within the housing, the end cap slidingly movable between an uncompressed position at which the volume of the inner chamber is at a maximum value and a compressed position at which the volume of the inner chamber is at a minimum value; a position indicating member associated with the end cap and housing to indicate the position of the end cap relative to the housing at predetermined positions between the uncompressed position and the compressed position, wherein the position indicating member further comprises: one of a plurality of teeth and a pawl disposed on the housing; and another of the plurality of teeth and the pawl disposed on the end cap, the plurality of teeth and the pawl being configured to mate with one another to indicate the position of the end cap relative to the housing at predetermined positions between the uncompressed position and the compressed position.