US Patent 11510809 Non-gravitational fluid delivery device for ophthalmic applications

A fluid dispensing device includes a cartridge comprising a housing and a head coupled to the housing. The housing forms a first chamber configured to accommodate a fluid; and the head includes a nozzle; and an elastomeric wall that is spaced from the nozzle to form a holding chamber. The holding chamber is in fluid communication with the first chamber and configured to accommodate a portion of the fluid; and the nozzle forms one or more openings to eject the portion of the fluid from the holding chamber. The one or more openings form an oblong shape such that a length of the oblong shape is greater than a width of the oblong shape. The one or more openings can include two parallel slots that together form the oblong shape.