Patent US3656209A successfully refreshed from Google Patents.
US3656209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Etching acid pick-up apparatus
Assignee: Individual
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Filing: 1970-08-28
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Granted: 1972-04-18
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Expires: 1990-08-28
Abstract
Abstract An apparatus adapted for retrieving etching fluid used in applying seamless floors, particularly a pick-up head having a power-rotated spiralled brush for throwing liquid upward from the surface over which the brush passes onto an overlying plate which is grooved to channel the liquid toward a central vacuum aperture in the pick-up head.
Inventors
- 👤 Russell S Kinser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:34
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4063; A47L11/4069; A47L11/29; A47L11/30; A47L11/302; A47L11/4013; A47L11/4016; A47L11/4036; A47L11/4041; A47L11/4044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
251 words
An apparatus for suction removal of loose material from a floor surface or the like comprising a closed tank having an electric motor-powered fan mounted therein for reducing the pressure in the tank below atmospheric pressure, a movable pickup head remote from said tank, tube means providing communication between the interior of said tank and said head, an open-faced housing adapted to be moved over a floor surface with its open face adjacent to but spaced slightly from the floor surface, a transverse trough formed within said head adjacent its rear margin, a suction aperture in said head communicating with the interior of said trough and with said tube means, a brush extending trAnsverse to the direction of motion of said head and mounted for rotation within said head and adapted to engage the floor surface over which the head is moved, power means mounted on the exterior of the head adapted to rotate said brush so that the portion of said brush at the floor surface moves toward the front margin of said head, a plate mounted within said head to overlie said brush and extending to the front margin of said transverse trough, said plate having a curved configuration with its concave face adjacent said brush and having grooves therein extending generally radially of said suction aperture, whereby loose material on the floor surface is thrown by said brush against said grooved plate face, the grooves guiding said material to said trough for removal therefrom through said suction aperture.
Claim 2
Independent Claim
251 words
An apparatus for suction removal of loose material from a floor surface or the like comprising a closed tank having an electric motor-powered fan mounted therein for reducing the pressure in the tank below atmospheric pressure, a movable pickup head remote from said tank, tube means providing communication between the interior of said tank and said head, an open-faced housing adapted to be moved over a floor surface with its open face adjacent to but spaced slightly from the floor surface, a transverse trough formed within said head adjacent its rear margin, a suction aperture in said head communicating with the interior of said trough and with said tube means, a brush extending trAnsverse to the direction of motion of said head and mounted for rotation within said head and adapted to engage the floor surface over which the head is moved, power means mounted on the exterior of the head adapted to rotate said brush so that the portion of said brush at the floor surface moves toward the front margin of said head, a plate mounted within said head to overlie said brush and extending to the front margin of said transverse trough, said plate having a curved configuration with its concave face adjacent said brush and having grooves therein extending generally radially of said suction aperture, whereby loose material on the floor surface is thrown by said brush against said grooved plate face, the grooves guiding said material to said trough for removal therefrom through said suction aperture.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |