Patent ID: 7588170

Claim:
Dispensing unit for dispensing two fluid substances, comprising: a pump assembly having a first pump and a second pump, actuable by a common, manually operable operating means to simultaneously dispense the two fluid substances, and a reservoir assembly for holding the two fluid substances, the reservoir assembly comprising two integral reservoirs, which are each provided with an outlet at an outlet side and are each delimited by a movable piston on a side remote from the outlet, wherein each of the pistons moves towards a respective one of the outlets during the dispensing of the fluid substances, characterized in that the reservoir assembly and the pump assembly are separate assemblies which are couplable to one another, in such a manner that in an uncoupled state each reservoir is filled through the outlet of the reservoir, after which the pump assembly and the reservoir assembly are coupled to one another, wherein a diameter or cross section of the first and/or second reservoir is increased in a vicinity of the outlet, in such a manner that the piston is under a reduced prestress in a filling position in the vicinity of the outlet.