Abstract: A foam dispensing mechanism (100; 600) comprises: a top (113); a cylindrical wall (112; 612) extending from a peripheral edge of the top; a piston member (170) arranged within the cylindrical wall; a dispense head (120) axially displaceable with respect to the top; a resilient bias member (130) for biasing the dispense head. The piston member has a first opening (176) and a coupling cylinder (178) arranged coaxially around said first opening. The dispense head has a cylindrical seal member (150) positionally fixed with respect to the dispense head (120), the seal member (150) having a first passage opening (156) with a valve seat (151), wherein the seal member's lower portion (157) is sealingly and axially slidably coupled to the coupling cylinder. An axially displaceable valve member (190) for blocking or releasing said first passage opening has a valve stem (192) having its end (193) coupled to the piston member.

Abstract: A foam dispensing mechanism (100; 600) comprises: a top (113); a cylindrical wall (112; 612) extending from a peripheral edge of the top; a piston member (170) arranged within the cylindrical wall; a dispense head (120) axially displaceable with respect to the top; a resilient bias member (130) for biasing the dispense head. The piston member has a first opening (176) and a coupling cylinder (178) arranged coaxially around said first opening. The dispense head has a cylindrical seal member (150) positionally fixed with respect to the dispense head (120), the seal member (150) having a first passage opening (156) with a valve seat (151), wherein the seal member's lower portion (157) is sealingly and axially slidably coupled to the coupling cylinder. An axially displaceable valve member (190) for blocking or releasing said first passage opening has a valve stem (192) having its end (193) coupled to the piston member.

Abstract: The invention relates to a system of bellows and co-acting part, including a co-acting part which comprises a stiff outer wall, and a bellows co-acting therewith which comprises a flexible wall of a predetermined shape and thickness, wherein the flexible wall of the bellows is movable along the stiff outer wall of the co-acting part, wherein the bellows includes at least two separately deformable flexible wall parts' which each co-act with a different part of the stiff outer wall of the co-acting part.

Abstract: A foam-forming unit is disclosed. The foam-forming unit includes a mixing chamber communicating with the outlet of a pump for the purpose of mixing liquid and air, and includes a dispensing part provided with an outflow channel with a foam opening for dispensing foam, wherein the outflow channel is in communication with the mixing chamber. Further, a first foam-forming element is included, arranged in the outflow channel such that the foam flowing through the outflow channel passes through the foam-forming element at least twice. The dispensing part is further provided with a spout element in which is located the final part of the outflow channel and the foam opening. Finally, the outflow channel includes a cavity after the first passage through the first foam-forming element, which cavity lies before the spout element as seen in flow direction.

Abstract: The invention relates to a system of bellows and co-acting part, comprising a co-acting part which comprises a stiff outer wall, and a bellows co-acting therewith which comprises a flexible wall of a predetermined shape and thickness, wherein the flexible wall of the bellows is movable along the stiff outer wall of the co-acting part, wherein the bellows comprises at least two separately deformable flexible wall parts' which each co-act with a different part of the stiff outer wall of the co-acting part.