Patent US4406678A successfully refreshed from Google Patents.
US4406678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector for vacuum cleaner
Assignee: Vorwerk and Co Interholding GmbH
•
Filing: 1982-02-08
•
Granted: 1983-09-27
•
Expires: 2002-02-08
Abstract
Abstract A dust collector for a vacuum cleaner having a blower has an outer wall with an air-impermeable main portion bounding an inner chamber and a limited air-permeable portion, a filter accommodated in the chamber and connectable with the blower, and an additional filtering member associated with the air-permeable portion of the outer wall. The additional filtering member may be composed of an electrostatically chargeable filtering material and may be formed as a separate member or as a part of the wall of the dust collector.
Inventors
- 👤 Horst Neugart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:57
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/12; A47L9/122
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
82 words
A dust collector for a vacuum cleaner with a blower, comprising a housing bounding an inner chamber and having an inlet, a main air-impermeable wall, and a limited air-permeable wall forming an outlet; a filter bag having an inlet and accommodated in said inner chamber of said housing and connectable with the blower via said inlets; and an additional filtering member capable of retaining fine dust particles forming said air permeable wall which defines said outlet and connected with said air-impermeable wall.
Claim 2
Dependent Claim
82 words
A dust collector for a vacuum cleaner with a blower, comprising a housing bounding an inner chamber and having an inlet, a main air-impermeable wall, and a limited air-permeable wall forming an outlet; a filter bag having an inlet and accommodated in said inner chamber of said housing and connectable with the blower via said inlets; and an additional filtering member capable of retaining fine dust particles forming said air permeable wall which defines said outlet and connected with said air-impermeable wall.
Claim 3
Dependent Claim
23 words
A dust collector defined in claim 1, wherein said air-permeable wall formed by said filtering member is a side wall of said housing.
Claim 4
Dependent Claim
30 words
A dust collector as defined in claim 1, wherein said filter bag is arranged to intercept relatively coarse dust particles, said filtering member being arranged to intercept fine dust particles.
Claim 5
Dependent Claim
20 words
A dust collector as defined in claim 1, wherein said filtering member is composed of an electrostatically charged filtering material.
References Cited (Backward Citations)
US1992042A
Cited
US1997720A
Cited
US2597927A
Cited
US2784800A
Cited
US3279157A
Cited
US3550182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-26 | 1987-03-28 | 1987-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-26 | 1991-03-28 | 1991-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-26 | 1995-03-28 | 1995-09-27 | $7700.00 | Window Closed / Lapsed |