Patent ID: 8127660
Filing Date: 2012-03-06
Classification: F04B,F15B,F16F,F16J

Abstract:
1. A piston-chamber combination device comprising an elongate chamber which is bounded by an inner chamber wall and comprising a piston in said chamber to be sealingly movable relative to said chamber at least between first and second longitudinal positions of said chamber, said chamber having cross-sections of different cross-sectional areas at the first and second longitudinal positions of said chamber and at least substantially continuously differing cross-sectional areas at intermediate longitudinal positions between the first and second longitudinal positions thereof, the cross-sectional area at the first longitudinal position being larger than the cross-sectional area at the second longitudinal position, said piston being designed to adapt itself and to seal throughout different cross-sectional areas of said chamber during the relative movements of said piston from the first longitudinal position through said intermediate longitudinal positions to the second longitudinal position of said chamber, wherein the piston comprises, an elastically deformable container formed from a multi-layered and reinforced wall structure and containing a deformable material and forming an exterior seal area increasing in size and extending parallel to the inner chamber wall as the piston moves toward the second longitudinal position and decreasing in size as the piston move toward the first longitudinal position.