A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 1/00 (2006.01) F04B 49/06 (2006.01) A61M 1/04 (2006.01) A61M 1/06 (2006.01)
Patent
CA 2115824
The pump as described in this invention comprises electronic and mechanical components which allow an individually adjustable operation. For this purpose, this invention provides for components (2,5,8) which periodically transform a driving current for an electrical drive (1). An adjustable clock generator (3) adjusts their transformation frequency. The pumping volume is determined and limited as desired by means of a position detection device (4). As provided for by this invention, the pump also comprises components (7) gor measuring the driving current, which interact with an adjustable current-limiting device (5), thus allowing the pumping pressure of the pump to be adjusted and limited. In a preferred embodiment of this invention, the pump comprises several pump cylinders which are controlled by a position control circuit (8) in such a way that the generated partial vacuum follows a predetermined time characteristic.
Berner Werner
Riedweg Robert
Ameda Ag
Ridout & Maybee Llp
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