F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
F04B 43/073 (2006.01) F17D 3/12 (2006.01)
Patent
CA 2591378
In a diaphragm dosing pump with a gas-operated drive, in particular for adding in a dosed manner adjuvants into gas pipelines, for example a natural gas well, having a drive head (11) for the diaphragm dosing pump (1), a drive rod (13) moving back and forth in a cylinder chamber (12) of the drive head (11), which carries a drive part (14) separating the cylinder chamber (12) into two chambers (15, 16) and is effectively connected to the piston rod (3) of the diaphragm dosing pump (1), a feeding pipeline (19) connected to the cylinder chamber (12) of the drive head (11) for pressurized gas from the gas pipeline (18) and a control valve (20) between the gas feeding pipeline (19) as well as an outlet (21) for the relaxed gas to return to the gas pipeline (18), the arrangement is made such that the drive head (11) of the diaphragm dosing pump (1) is embodied as a simply operating gas drive such that only the pressure stroke side (15) of the drive head (11) is connected via the control valve (20) to the pressurized gas feeding pipeline (19) while the suction stroke side (16) of the drive head (11) is connected at all times to the gas outlet (21) and that on the suction stroke side of the drive head (11) a spring (17) is provided, which acts upon the drive part (14) in the direction of the suction stroke.
Lewa Gmbh
Ridout & Maybee Llp
LandOfFree
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