Patent · US Expired

Dental suction apparatus

US4842478A · kind A · utility

10Cited by

5References

15Claims

0Family size

Assignee

Durr Dental AG · DE

Inventors

Walter Durr · Remchingen, DE
Hans Hofmann
Andreas Bollmann · Bietigheim-Bissingen, DE

Key dates

Filing date	Jun 14, 1988
Grant date	Jun 27, 1989
Priority date	—
Expiry date	Jun 14, 2008

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB04C2009/005
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

In an aspirating unit for dental workstations the blower impeller of a vacuum pump (32), a propeller (84) and a pump impeller (68) sit on a common drive shaft (66). The drive shaft (66) is enclosed by a cyclone air extractor (34), the propeller (84) keeping foam components contained in the incoming air and fluid mixture clear of the air discharge connection of the cyclone fluid extractor (34). The pump impeller (68) conveys the fluid discharged at the bottom end of the cyclone fluid extractor (34) forcibly to the fluid outlet connection (28) of the aspirator.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.