Patent US2244885A successfully refreshed from Google Patents.
Patent EP0042723A2 successfully refreshed from Google Patents.
EP0042723A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Vacuum cleaning appliance
Assignee: Cessione notetry Ltd
•
Filing: 1981-06-17
•
Granted: —
•
Expires: 2001-06-17
Abstract
Abstract A vacuum cleaning appliance comprises a low efficiency cyclone unit and a high efficiency cyclone unit connected in series. This enables both large and fine dirt particles to be dealt with. The low efficiency cyclone has a cylindrical casing 13 containing a frusto-conical body portion 15 of the high efficiency cyclone, a pipe 14 connecting the casing 13 to the portion 15. A dirty air entry passage 11 extends up one side of the appliance and a clean air exit passage 21 descends the other side.
Inventors
- 👤 James Dyson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 19:07
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/16; A47L9/1616; A47L9/1625; A47L9/1633; Y; Y10; Y10S; Y10S55/00; Y10S55/03
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
60 words
A vacuum-cleaning appliance including a cyclone unit and means for generating an airflow from a dirty air inlet through the said cyclone unit the cyclone unit being of a high efficiency having the capability of depositing fine dust particles and the appliance being characterised by a lower efficiency cyclone unit in the air path upstream of the high efficiency unit.
Claim 2
Dependent Claim
60 words
A vacuum-cleaning appliance including a cyclone unit and means for generating an airflow from a dirty air inlet through the said cyclone unit the cyclone unit being of a high efficiency having the capability of depositing fine dust particles and the appliance being characterised by a lower efficiency cyclone unit in the air path upstream of the high efficiency unit.
Claim 3
Dependent Claim
74 words
A vacuum cleaning appliance according to Claim 1 characterised by a casing 1 with a dirty air inlet, a generally cylindrical container 13 constituting the lower efficiency cyclone unit positioned within the casing and being connected to the dirty air inlet, the high efficiency cyclone having a frusto-conical body part 15 and being positioned within the lower efficiency cyclone unit, air being caused to flow from the low to the high efficiency cylone unit.
Claim 4
Dependent Claim
64 words
A vacuum cleaning appliance according to Claim 2 characterised by a dirty air entry passage 11 extending up one side of the casing to the entry port 14 to container 13 and a clean air exit passage 21 extending down the other side of the casing from the exit to body part 15, a pipe 14 connecting the low and high efficiency cyclone units.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.