Patent ID: 11954997
Assignee: OP-HYGIENE IP GMBH
Field: Chemical engineering (Chemistry)
Classification: CPC G  A  B  F | IPC A  B  F  G

Claim 6:
7. The fluid dispenser according to claim 6, wherein the air passage is defined between the piston body and the second air chamber forming body;
wherein the second air chamber forming body comprises a sealing zone and an unsealing zone;
wherein the piston body is configured to sealingly engage with the second air chamber forming body when positioned within the sealing zone, thereby sealing the air passage;
wherein the piston body is configured to at least partially disengage from the second air chamber forming body when positioned within the unsealing zone, thereby unsealing the air passage;
wherein the second air chamber forming body comprises a cylindrical outer wall, the outer wall having a first diameter in the sealing zone and a second diameter in the unsealing zone, the second diameter being larger than the first diameter;
wherein the piston body comprises an outer edge that is configured to sealingly engage with the second air chamber forming body when positioned within the sealing zone, and to at least partially disengage from the second air chamber forming body when positioned within the unsealing zone; and
wherein the outer edge of the piston body is positioned within the unsealing zone when the piston body is between the first position and the second sound start position, and is positioned within the sealing zone when between the second sound start position and the second position.