Cleaning and disinfection machine for medical devices having nar

Details Cleaning and disinfection machine for medical devices having nar Cleaning and disinfection machine for medical devices having nar

1994-12-29

1996-09-03

Stinson, Frankie L.

Cleaning and liquid contact with solids

Apparatus

For work having hollows or passages

134469C, 134184, 417404, B08B 304

Patent

active

055514626

ABSTRACT:
The cleaning and disinfection machine for medical devices with narrow channels particularly endoscopes, has a pressure chamber (1) in which the objects to be cleaned are inserted. A circulating pump of the machine supplies the pressure chamber with pressurized cleaning fluid. Arranged inside the pressure chamber (1) is a pressure-increase unit (2) that consists of a two-stage piston-cylinder arrangement (3, 5, 8; 4, 6, 9). The two pistons (5, 6) have different diameters and thus different effective cross-sections. The inlet side of the larger piston is fed with pressurized cleaning fluid. The outlet side (9) contains cleaning fluid that is supplied to the channel to be cleaned. The second piston has a smaller diameter so that the pressure is greater on the outlet side (chamber 9). When the circulating pump is switched off, the pistons (5, 6) are forced back into a starting position by a spring (13).

REFERENCES:
patent: 3182670 (1965-05-01), Howell
patent: 4667691 (1987-05-01), Sasa
patent: 5107875 (1992-04-01), Sundholm
patent: 5137436 (1992-08-01), Vogel
patent: 5225001 (1993-07-01), Manni et al.
patent: 5288467 (1994-02-01), Biermaier
patent: 5377709 (1995-01-01), Shibano

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