Patent US4594749A successfully refreshed from Google Patents.
US4594749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner with air jet assist
Assignee: Individual
•
Filing: 1984-11-13
•
Granted: 1986-06-17
•
Expires: 2004-11-13
Abstract
Abstract A vacuum cleaner head with a hood which closely fits the floor has a rotor with a plurality of nozzles supported on a hub with a slot. Outside air is drawn through the hub and nozzles into the hood to provide air jets from the nozzles which assist in disloging particles for recovery by the vacuum.
Inventors
- 👤 Dale G. Waterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:10
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02; A47L9/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
A vacuum head having a downwardly open hood having an air supply inlet and an outlet connectable to a source of vacuum, a rotor with a plurality of air nozzles, support means for rotatably supporting said rotor within the cavity of said hood and including valve means for connecting said air supply inlet to said rotor whereby air is discharged through the nozzles as a result of a pressure differential between the inside of the hood and outside of the hood at a predetermined position as said rotor is rotated during use on a supporting surface and wherein said support means includes a hollow hub and wherein said rotor includes an elongated tube with a pluraltity of protruding nozzles wherein said nozzles are arranged in longitudinal rows and said valve means comprises a longitudinal slot in said hub registerable, in sequence with each row of nozzles to afford discharge of air from said nozzles to stir up debris to be recovered by the vacuum in said hood.
Claim 2
Dependent Claim
167 words
A vacuum head having a downwardly open hood having an air supply inlet and an outlet connectable to a source of vacuum, a rotor with a plurality of air nozzles, support means for rotatably supporting said rotor within the cavity of said hood and including valve means for connecting said air supply inlet to said rotor whereby air is discharged through the nozzles as a result of a pressure differential between the inside of the hood and outside of the hood at a predetermined position as said rotor is rotated during use on a supporting surface and wherein said support means includes a hollow hub and wherein said rotor includes an elongated tube with a pluraltity of protruding nozzles wherein said nozzles are arranged in longitudinal rows and said valve means comprises a longitudinal slot in said hub registerable, in sequence with each row of nozzles to afford discharge of air from said nozzles to stir up debris to be recovered by the vacuum in said hood.
Claim 3
Dependent Claim
43 words
The vacuum head of claim 1 wherein said nozzles are formed from flexible material and are deformable in the course of engagement with the supporting surface to change the angle of air discharge from the jets to provide air discharge in random directions.
Claim 4
Dependent Claim
21 words
The vacuum head of claim 2 wherein said nozzles are arranged in a pattern to provide a sweeping action during use.
Claim 5
Dependent Claim
38 words
The vacuum head of claim 1 wherein said support means flexibly connects said rotor to said hood to downwardly urge said rotor against the supporting surface and is yieldable upwardly in response to irregularities in the supporting surface.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |