Patent US3227061A successfully refreshed from Google Patents.
Patent US4783878A successfully refreshed from Google Patents.
US4783878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner
Assignee: First National Bank of Chicago
•
Filing: 1987-03-11
•
Granted: 1988-11-15
•
Expires: 2007-03-11
Abstract
Abstract According to the invention, a canister with bottom and peripheral walls defines an accumulation space for matter picked up by the vacuum. A lid is secured to the upper edge of the canister and seals the space. The invention resides in the provision of a canister extension whose bottom edge conforms to the top edge of the canister and bears thereupon. The extension can be secured to the canister permanently or removably in any known manner, as by sonic welding or the like. The lid in turn mates with the extension in the same manner that it mates with the open canister edge. Accordingly, the canister capacity is increased. Any number of such extensions can be employed depending upon the range of capacity sought. The invention also contemplates providing a plate bounding an impeller chamber that can be inverted to selectively accommodate different capacity impellers and different capacity motors.
Inventors
- 👤 James McCambridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:59
CPC Classifications
A; A47; A47L; A47L7/00; A47L7/0004; A47L7/0023; A47L7/0028; A47L7/0042
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
185 words
An improved vacuum cleaner of the type having a canister with a removable lid and defining an internal space and an inlet to admit matter into the internal space for accumulation therein, the improvement comprising: a motor without a casing having means for evacuating air from the space within the canister; a housing defining a cavity to accept the motor; means for attaching the housing to the canister; means for mounting the motor without a casing in the housing cavity, said motor mounting means including a cylindrical portion extending into the cavity to define a cylindrical chamber for close surrounding reception of only a portion of the motor so that the remainder of the motor is directly exposed to the housing cavity; means for exhausting air from the cylindrical chamber; and said motor mounting means including means for admitting ambient air into the housing cavity and for guiding passage of incoming ambient air in heat exchange relationship directly against and past the motor through the cylindrical chamber in a cooling flow path and through said exhausting means after passage of said air against the motor.
Claim 2
Dependent Claim
185 words
An improved vacuum cleaner of the type having a canister with a removable lid and defining an internal space and an inlet to admit matter into the internal space for accumulation therein, the improvement comprising: a motor without a casing having means for evacuating air from the space within the canister; a housing defining a cavity to accept the motor; means for attaching the housing to the canister; means for mounting the motor without a casing in the housing cavity, said motor mounting means including a cylindrical portion extending into the cavity to define a cylindrical chamber for close surrounding reception of only a portion of the motor so that the remainder of the motor is directly exposed to the housing cavity; means for exhausting air from the cylindrical chamber; and said motor mounting means including means for admitting ambient air into the housing cavity and for guiding passage of incoming ambient air in heat exchange relationship directly against and past the motor through the cylindrical chamber in a cooling flow path and through said exhausting means after passage of said air against the motor.
Claim 3
Dependent Claim
24 words
The improved vacuum cleaner according to claim 1 wherein an outlet fitting for accepting an exhaust hose is formed integrally with the housing means.
Claim 4
Dependent Claim
29 words
The improved vacuum cleaner according to claim 2 wherein said housing including said cylindrical portion surrounding the motor and the outlet fitting is a single, injection molded, plastic piece.
Claim 5
Dependent Claim
49 words
The improved vacuum cleaner according to claim 1 wherein said cavity is bounded by a peripheral wall and an upper wall defining an inverted cup-shaped configuration, and said cylindrical portion of the motor mounting means depends from the upper wall and resides at least partially within the housing cavity.
Claim 6
Dependent Claim
40 words
The improved vacuum cleaner according to claim 4 wherein said cylindrical portion is at least partially outside of said cavity and the exhausting means comprises an opening in the cylindrical portion that is at least partially outside of said cavity.
References Cited (Backward Citations)
US1316442A
Cited
US2233167A
Cited
US2989227A
Cited
US3091182A
Cited
US3082465A
Cited
US3308609A
Cited
US3543368A
Cited
US3618297A
Cited
US3732667A
Cited
US3775951A
Cited
SU574551A1
Cited
US3967915A
Cited
US4171208A
Cited
US4222753A
Cited
US4435877A
Cited
US4547206A
Cited
US4538971A
Cited
US4508490A
Cited
US4569100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |