Device for operating devices for propellant cans
OwnerVolker Koppinventor
Life of this patent
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Abstract
The outlet tubes of pressurized cans containing, for example, polyurethane which is to be foamed, very frequently become clogged. The unconsumed residue of the substance intended to be dispensed consequently becomes unusable. This is prevented in accordance with the invention by the use of tubes which are sufficiently stiff to enable them to be folded back over themselves to form a solvent-tight pinch fold, in which folded-back position the tube is held by a holding device. In addition, the free end of the tube can also be closed.
Claims28
A device for a region of cans held under propellant pressure where liquid to pasty substances containing solvent pass from said region, comprising:
- an operating device for delivering said substances,
- an outlet connection piece with an end region, on said operating device,
- a tube made of vapor-tight material having an end region and at least one region that is resilient and flexible, which tube is mounted vapor-tight on said end region of said outlet connection piece, wherein
- a) said tube can be bent back over itself into a bent back over position to form a pinch fold;
- b) a holding device is connected to said outlet connection piece to hold said tube in said bent back over position, said tube being detachable by hand from said holding device;
- c) said pinch fold is substantially solvent-tight and liquid-tight;
- and
- d) said holding device comprises a stopper that can be inserted under friction into said end region of said tube.
Dependencies are inferred from the claim text.