Pressure medium-driven dispensing appliance for operating...

Details Pressure medium-driven dispensing appliance for operating... Pressure medium-driven dispensing appliance for operating...

B - Operations, Transporting

65

D

222/69.1

B65D 81/32 (2006.01) B67D 7/22 (2010.01) B01F 15/00 (2006.01) B05C 17/005 (2006.01) B05C 17/015 (2006.01) B65D 83/00 (2006.01)

Patent

CA 1338148

The dispensing appliance customarily built in "pistol form" for double cartridges with plunger has a pressure medium- driven cylinder/piston unit with rams extending from the piston for forward drive of the plungers. The problem here consists in that during the piston forward thrust the reaction forces from the plungers acting upon the two rams can be very different (different viscosities of the substances contained in the two cartridge cylinders and/or different cross-sections of the cartridge cylinders). In order to prevent tilting or jamming of the piston, the invention provides in the cylinder space a rigid longitudinal guide between both cylinder end walls against which the piston is slidingly supported with a longitudinally extended guide bore. The longitudinal guide can simultaneously reinforce the cylinder and further lead the pressure medium into the pressure chamber behind the piston by way of a longitudinal channel. In this connection, rapid ventilation for the pressure chamber as well as control means for guiding the piston unit back to its starting position are described. Further, retrieval means for the piston for ram relief after each forward thrust step as well as indicator elements for the cartridge fill-level are disclosed.

557229

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