Dispensing – With cleaning means
Patent
1989-05-12
1991-02-19
Huppert, Michael S.
Dispensing
With cleaning means
141 90, 141 91, 141147, 141259, 222255, B67D 552, B65B 4350
Patent
active
049935984
ABSTRACT:
A process for the sterilization of pumps for liquid or pasty pharmaceuticals, cosmetics, foodstuffs or similar products, preferably for pumps in which the piston can be driven to slide longitudinally in a cylinder and, at the same time, to rotate about its own axis. The piston contains a recess that reaches as far as the circular cylinder wall and the working face of the piston and communicates with a suction connection in the cylinder wall during a suction stroke and with a pressure connection in the cylinder wall during a pressure stroke and where, further, a closable drainage aperture is preferably provided in the bottom end of the cylinder. A sterilization medium is fed to a pump connection while the pump is being driven. Consequently, the pump does not have to be dismantled for sterilization purposes.
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patent: 4759695 (1988-07-01), Bordini
Groninger & Co. GmbH
Hackler Walter A.
Huppert Michael S.
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