GB714808A - Improvements in or relating to vacuum cleaners - Google Patents
Improvements in or relating to vacuum cleanersInfo
- Publication number
- GB714808A GB714808A GB19914/52A GB1991452A GB714808A GB 714808 A GB714808 A GB 714808A GB 19914/52 A GB19914/52 A GB 19914/52A GB 1991452 A GB1991452 A GB 1991452A GB 714808 A GB714808 A GB 714808A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impeller
- wall
- thread
- scheid
- passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000428 dust Substances 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000009958 sewing Methods 0.000 abstract 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
714,808. Centrifugal blowers. SCHEID, A. M., SCHEID, E. M., and SCHEID, W. M., [trading as VORWERK & CO.], Aug. 7, 1952 [Aug. 16, 1951], No. 19914/52. Class 110(1) In a vacuum cleaner in which air leaving the impeller passes by way of an annular passage 7 and a discharge connection 8 to a dust collector, the inner wall 10 of the annular passage is tapered towards the impeller. A sewing thread drawn into the cleaner will be thrown off by the impeller into the passage 7 and, if it fails to pass directly into the discharge connection 8. will tend to be coiled around the conical inner wall 10. Provided that the apex angle # of the wall 10 is 20 degrees or more, the component in the direction of the impeller of the force acting on the thread will exceed the friction between the thread and the wall 10, and the thread will move towards the impeller into circles of smaller diameter, whereby it is loosened. After detachment, which is assisted by the sharp air current in the gap 11, the thread is swept by the impeller outflow against the outer wall of the channel 7 and is carried around to the discharge connection 8. A conical wall 9 is recessed so that the back plate 6 of the impeller lies flush with the peripheral part of the wall, which is rounded to merge with the wall 10. The back plate 6 may be flat instead of conical, and the passage 7 may be disposed as shown dotted. The front edges 5<SP>1</SP> of the impeller blades 5 form an angle a of 45 to 90 degrees with the impeller axis.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE302889X | 1951-08-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB714808A true GB714808A (en) | 1954-09-01 |
Family
ID=6108479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19914/52A Expired GB714808A (en) | 1951-08-16 | 1952-08-07 | Improvements in or relating to vacuum cleaners |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2743054A (en) |
| BE (1) | BE513488A (en) |
| CH (1) | CH302889A (en) |
| FR (1) | FR1061355A (en) |
| GB (1) | GB714808A (en) |
| NL (2) | NL85061C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3071916A (en) * | 1963-01-08 | figures | ||
| US3019963A (en) * | 1955-07-08 | 1962-02-06 | Eck Bruno Christian | Radial blower for gases with high dust content |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR388267A (en) * | 1908-03-17 | 1908-08-07 | L Eclairage Electr Soc | Improvements to helico-centrifugal pumps |
| US1042506A (en) * | 1912-03-15 | 1912-10-29 | Charles Emile Jules De Vallat | Propeller. |
| US2040188A (en) * | 1933-12-20 | 1936-05-12 | Hoover Co | Suction cleaner |
| GB419176A (en) * | 1934-01-06 | 1934-11-07 | Drysdale & Co Ltd | Improvements in centrifugal pumps of the semi-axial flow type |
| US2463976A (en) * | 1942-02-21 | 1949-03-08 | Sulzer Ag | High-pressure compressor |
| GB579780A (en) * | 1943-11-19 | 1946-08-15 | John Sharpley Jones | Improvements in or relating to compressors, pumps and the like |
-
0
- NL NLAANVRAGE7413270,A patent/NL171377B/en unknown
- BE BE513488D patent/BE513488A/xx unknown
- NL NL85061D patent/NL85061C/xx active
-
1952
- 1952-07-21 CH CH302889D patent/CH302889A/en unknown
- 1952-08-07 GB GB19914/52A patent/GB714808A/en not_active Expired
- 1952-08-08 FR FR1061355D patent/FR1061355A/en not_active Expired
- 1952-08-12 US US303890A patent/US2743054A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL85061C (en) | |
| NL171377B (en) | |
| CH302889A (en) | 1954-11-15 |
| FR1061355A (en) | 1954-04-12 |
| BE513488A (en) | |
| US2743054A (en) | 1956-04-24 |
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