Refillable dispensing device having wiper seal

摘要

A readily refillable dispensing device for dispensing liquids and other fluids without a use of gaseous propellants includes an outer casing having an aerosol valve assembly, a refill assembly which is received within the outer case and an end cap. The refill assembly includes a rigid cylindrical sleeve, a piston slidably received within the cylindrical sleeve, a rubber wiper seal, and a coil spring for biasing the piston towards an upper portion of the refill assembly. The piston includes at least one depending lock hook which releasably engages a lower sleeve closure of the cylindrical sleeve. The piston is released from the lower sleeve closure by threading the bottom cap onto the outer case. A cam of the bottom cap urges the at least one depending lock hook out of engagement with the lower sleeve closure. The wiper seal is preferably made of a resilient material such as rubber or neoprene and effectively seals an interior chamber of the refill assembly.