Multi-refillable spray can, device for filling said cans and method for producing said spray cans
AssigneeEBB Ingenieurgesellschaft
InventorsHermann Runge, Manfred Stadler, Werner Massen
Life of this patent
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Abstract
A multi-refillable spray can with a piston arranged in the cylindrical part of the interior of said can, whereby said piston has seals associated with the inner wall thereof. The area below the piston is filled with compressed air instead of the usual environmentally damaging propellant gases. The spray is accommodated in the area formed by the upper side of the piston, the lower side of the valve head and the upper inner wall of the can. The piston has a rubber valve on the upper side facing the spray, whereby the bottom of the can is fully closed.
Claims9
A refillable monoblock spray can with a cylindrical body and a conical neck portion which is closed by means of a spray valve receiving a valve disk through which fluid under pressure is filled into the can, comprising:
- a) a piston positioned within a cylindrical portion of an interior of the can, said piston is provided with seals associated to an inner peripheral wall of the can,
- b) a space underneath said piston is filled with pressurized air forming a propellant,
- c) said space formed by an upper side of said piston, a lower side of said valve disk and said upper inner wall of said can receives a fluid to be sprayed,
- d) said spray valve is integrated into a bottom of the valve disk, and
- e) a valve is arranged within said piston at said upper side facing said fluid to be sprayed.
Dependencies are inferred from the claim text.