Automated dialysis system including a piston and stepper motor
US8066671B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2010 |
| Grant date | Nov 29, 2011 |
| Priority date | — |
| Expiry date | Oct 13, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/583
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A peritoneal dialysis system includes a hardware unit including a piston having a contact surface and a stepper motor configured to move the piston; and a disposable unit received by the hardware unit, the disposable unit including a moveable membrane operable with the contact surface of the piston, the piston moveable towards and away from the disposable unit, wherein (i) the piston and the membrane are positioned relative to each other and (ii) the hardware unit is configured to apply a negative pressure to the moveable membrane of the disposable unit so that the negative pressure causes the moveable membrane to contact and conform to a shape of the contact surface and to follow the piston as the piston is moved away from the disposable unit by the stepper motor, and wherein the shape-contacted membrane moves with the piston as the piston is moved into the disposable unit by the stepper motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.