Patent US3961921A successfully refreshed from Google Patents.
US3961921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner with an impermeable collector bag
Assignee: Vernco Corp
•
Filing: 1974-10-15
•
Granted: 1976-06-08
•
Expires: 1994-10-15
Abstract
Abstract A vacuum cleaner including a tank having an interior space for receiving dirt and debris, the tank providing an access opening, a blower assembly including a housing for closing the access opening, the housing providing, within the boundary of the access opening, an intake port for the tank, and the blower assembly including a motor and a blower for drawing air from the tank to create a vacuum therein. An impermeable flexible bag is disposed in the tank to provide a lining, the bag having a mouth in registry with the access opening such that dirt and debris entering the intake port are deposited into the bag. The bag has at least one vent opening therein for establishing venting between the interior of the bag and the space between its exterior and the internal surfaces of the tank to equalize the air pressure within the bag and the tank or the bag is disposed in the tank in such a manner as to establish such venting and equalize the air pressure.
Inventors
- 👤 Richard I. Heiman
- 👤 David R. Hult
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:08
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; A47L9/1418; A47L7/00; Y; Y10; Y10S; Y10S55/00; Y10S55/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
152 words
A vacuum cleaner including a tank having an interior space for receiving dirt and debris, said tank providing an access opening, a blower assembly including a housing for closing said access opening, said housing providing, within the boundary of said access opening, an intake port for said tank, and said blower assembly including a motor and a blower for drawing air from said tank to create a vacuum therein, and in which the improvement comprises impermeable flexible bag means disposed in and lining said tank, said bag means having a mouth in registry with said access opening such that dirt and debris entering said intake port are deposited into the interior of said bag means, and said bag means also having means for establishing venting between its interior and the space between its exterior and the internal surfaces of said tank to equalize the air pressure within said bag means and tank.
Claim 2
Dependent Claim
152 words
A vacuum cleaner including a tank having an interior space for receiving dirt and debris, said tank providing an access opening, a blower assembly including a housing for closing said access opening, said housing providing, within the boundary of said access opening, an intake port for said tank, and said blower assembly including a motor and a blower for drawing air from said tank to create a vacuum therein, and in which the improvement comprises impermeable flexible bag means disposed in and lining said tank, said bag means having a mouth in registry with said access opening such that dirt and debris entering said intake port are deposited into the interior of said bag means, and said bag means also having means for establishing venting between its interior and the space between its exterior and the internal surfaces of said tank to equalize the air pressure within said bag means and tank.
Claim 3
Dependent Claim
84 words
The improvement of claim 1 in which said bag means includes an impermeable bag and a relatively stiff ring disposed in said bag adjacent its mouth, said bag having its mouth portion folded over said ring such that said ring defines the opening into said bag means, said ring being in registry with said access opening, said ring being provided with peripherally spaced apart, outwardly extending projections engaging the internal surfaces of said tank such that the spaces between said projections establish said venting.
Claim 4
Dependent Claim
44 words
The improvement of claim 1 including a retaining ring in said tank adjacent to and in registry with said access opening, said bag means including an impermeable bag having its mouth portion engaged with said ring, said ring being apertured to provide such venting.
Claim 5
Dependent Claim
55 words
The improvement of claim 3 in which said access opening and said retaining ring are circular, said ring having radially outer and radially inner peripheral edge portions, said ring providing, at its radially inner edge portion, flange means extending peripherally and toward said access opening, said bag mouth portion being engaged with said flange means.
Claim 6
Dependent Claim
152 words
A vacuum cleaner including a tank having an interior space for receiving dirt and debris, said tank providing an access opening, a blower assembly including a housing for closing said access opening, said housing providing, within the boundary of said access opening, an intake port for said tank, and said blower assembly including a motor and a blower for drawing air from said tank to create a vacuum therein, and in which the improvement comprises an impermeable flexible bag disposed in and lining said tank, said bag having a mouth in registry with said access opening such that dirt and debris entering said intake port are deposited into said bag, and said bag having at least one vent opening therein for establishing venting between the interior of the bag and the space between its exterior and the internal surfaces of said tank to equalize the air pressure within said bag and tank.
Claim 7
Dependent Claim
152 words
A vacuum cleaner including a tank having an interior space for receiving dirt and debris, said tank providing an access opening, a blower assembly including a housing for closing said access opening, said housing providing, within the boundary of said access opening, an intake port for said tank, and said blower assembly including a motor and a blower for drawing air from said tank to create a vacuum therein, and in which the improvement comprises an impermeable flexible bag disposed in and lining said tank, said bag having a mouth in registry with said access opening such that dirt and debris entering said intake port are deposited into said bag, and said bag having at least one vent opening therein for establishing venting between the interior of the bag and the space between its exterior and the internal surfaces of said tank to equalize the air pressure within said bag and tank.
Claim 8
Dependent Claim
59 words
The improvement of claim 2 in which said bag is provided with a mouth portion bounding its said mouth, said mouth portion being folded outwardly and over the edge of said access opening to be clamped over said edge by said housing, and said vent opening being spaced inwardly from said mouth portion to be disposed within said tank.
Claim 9
Dependent Claim
66 words
The improvement of claim 6 including flap means attached to the interior of said bag and arranged to overlie said vent opening, said flap means being effective to keep dirt and debris from leaving said bag through said vent opening and to permit air movement for said space between the exterior of said bag and the interior of said tank into the interior of said bag.
Claim 10
Dependent Claim
52 words
The improvement of claim 6 including one-way valve means attached to said bag to prevent dirt and debris from leaving said bag through said vent opening and to permit air movement from said space between the exterior of said bag and the interior of said tank into the interior of said bag.
Claim 11
Dependent Claim
27 words
The improvement of claim 6 in which said vent opening is defined by an aperture in the wall of said bag with an eyelet bounding said aperture.
Claim 12
Dependent Claim
66 words
The improvement of claim 5 including flap means attached to the interior of said bag and arranged to overlie said vent opening, said flap means being effective to keep dirt and debris from leaving said bag through said vent opening and to permit air movement from said space between the exterior of said bag and the interior of said tank into the interior of said bag.
Claim 13
Dependent Claim
52 words
The improvement of claim 5 including one-way valve means attached to said bag to prevent dirt and debris from leaving said bag through said vent opening and to permit air movement from said space between the exterior of said bag and the interior of said tank into the interior of said bag.
Claim 14
Dependent Claim
25 words
The improvement of claim 5 in which said vent opening is defined by an opening formed in said bag and an eyelet bounding said opening.
Claim 15
Dependent Claim
28 words
The improvement of claim 5 in which said vent opening is covered by an air permeable material effective to prevent dirt and debris from moving through said opening.
References Cited (Backward Citations)
NL55055C
Cited
US948993A
Cited
US1879667A
Cited
US1828584A
Cited
US1881086A
Cited
US2025946A
Cited
US1924249A
Cited
US2027590A
Cited
US2222077A
Cited
US2714426A
Cited
US2697512A
Cited
GB766086A
Cited
US2815621A
Cited
GB1201841A
Cited
US3653190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |