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A pump for a system for dispensing a liquid as a spray, a spray nozzle unit, a system for dispensing a liquid as a spray and a method for dispensing a liquid as a spray
A pump for a system for dispensing a liquid as a spray, a spray nozzle unit, a system for dispensing a liquid as a spray and a method for dispensing a liquid as a spray
The present disclosure relates to a pump (1) for a system for dispensing a liquid as a spray, in particular for a dispensing system which comprises a compressible container (400). The pump (1) comprises a housing (100) forming a chamber (110) and a dispensing opening (120), and a regulator (200) being fixedly arranged in the chamber. The housing is resilient and has a longitudinal direction (L). The regulator comprises an inner valve (230) for regulating a flow of liquid between the container (400) and the chamber (110), an outer valve (220) for regulating a flow of liquid between the chamber and the dispensing opening, and a stem (210) extending in the longitudinal direction of the housing at least between the inner valve (230) and the outer valve (220). The stem is resilient along its length so as to be sideways bendable from an original shape to a distorted shape. The regulator further comprises a displacement guide (240) located at an outer portion of the stem on an inner side of the outer valve. The housing comprises a guide region (104) located adjacent to the displacement guide. An outer perimeter (244) of the displacement guide and at least a portion of an internal surface of the guide region are adapted to each other so as to allow relative displacement between the displacement guide and the guide region substantially along the longitudinal direction of the housing, so as to transfer the sideways bending of the stem to a relative displacement between the outer valve and the housing along the longitudinal direction of the housing. The disclosure further relates to a spray nozzle unit (500), a system for dispensing a liquid as a spray and a method for dispensing a liquid as a spray.
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