US3722147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air driven abrading device
Assignee: Individual
•
Filing: 1971-08-16
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Granted: 1973-03-27
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Expires: 1991-08-16
Abstract
Abstract An air powered device for abrading wall and floor surfaces. A turbine is disclosed within a dome-like housing. An abrading disc is powered by the turbine via a gear reduction drive. A source of reduced air pressure draws air into the housing past the periphery of the disc for the pick up of dust particles with the airflow path being inwardly to an area of low pressure located centrally of the turbine. A conduit member in communication with said source is movably attached to the dome-like housing and may additionally serve as a hand hold. An air barrier restricts the incoming airflow to the path over the periphery of the abrading disc.
Inventors
- 👤 L Brenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:47
CPC Classifications
B; B24; B24B; B24B23/00; B24B23/02; B24B55/00; B24B55/06; B24B55/10; B24B55/102; B24B7/00; B24B7/10; B24B7/18; B24B7/182; B24B7/184; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/453
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
An air driven abrading device for use on both upright and horizontal surfaces, said device comprising, a housing structure in communication with a source of reduced air pressure, a turbine journalled within said housing and adapted to receive a centripetal flow of air to drive same, means included within said housing structure for communicating the central area of the turbine with the source of reduced air pressure, a gear reduction drive powered by said turbine and in driving connection with an abrading disc, and an air barrier carried by said housing structure circumjacent said disc with the lower terminus of said barrier in closely spaced relationship to the work surface directing a restricted airflow past the disc periphery for the pick up of dust particles.
Claim 2
Dependent Claim
125 words
An air driven abrading device for use on both upright and horizontal surfaces, said device comprising, a housing structure in communication with a source of reduced air pressure, a turbine journalled within said housing and adapted to receive a centripetal flow of air to drive same, means included within said housing structure for communicating the central area of the turbine with the source of reduced air pressure, a gear reduction drive powered by said turbine and in driving connection with an abrading disc, and an air barrier carried by said housing structure circumjacent said disc with the lower terminus of said barrier in closely spaced relationship to the work surface directing a restricted airflow past the disc periphery for the pick up of dust particles.
Claim 3
Dependent Claim
56 words
An air driven abrading device as claimed in claim 1 wherein said turbine includes a base, fins disposed on said base and extending outwardly from the turbine center, said fins curving outwardly in the direction of rotation of the turbine and acted upon by an airflow traveling in a direction generally parallel to the turbine base.
Claim 4
Dependent Claim
32 words
An air driven abrading device as claimed in claim 1 wherein said housing is of domed configuration and includes universal socket means centrally disposed for the reception of a conduit end member.
Claim 5
Dependent Claim
44 words
An air driven abrading device as claimed in claim 1 wherein said turbine is operatively coupled to said gear reduction drive by a tubular shaft, said gear reduction drive including an output shaft journalled for a portion of its length within said tubular shaft.
Claim 6
Dependent Claim
39 words
An air driven abrading device as claimed in claim 1 wherein said air barrier is adjustably mounted on said mounting structure for adjustable movement toward and away from a work surface for the regulation of airflow into said housing.
Claim 7
Dependent Claim
59 words
An air driven abrading device as claimed in claim 2 wherein said housing is of domed configuration and includes universal socket means centrally disposed for the reception of a conduit end member, said air barrier adjustably mounted on said housing structure for adjustable movement toward and away from a work surface for the regulation of airflow into said housing.
Claim 8
Dependent Claim
44 words
A air driven abrading device as claimed in claim 6 wherein said turbine is operatively coupled to said gear reduction drive by a tubular shaft, said gear reduction drive including an output shaft journalled for a portion of its length within said tubular shaft.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |