US3863392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sand blast room
Assignee: Individual
•
Filing: 1974-03-21
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Granted: 1975-02-04
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Expires: 1994-03-21
Abstract
Abstract A sand blast room has a grid-like floor through which abrasive material resulting from sand blasting operations may fall. A series of parallel adjacent channels extends beneath the gridlike floor to receive the abrasive material. A suction duct is connected to one end of each channel and a closure plate is disposed at the upper portion of each channel and movable between open and closed positions. When a given closure plate is closed the suction is horizontal through the associated channel and clears the same of abrasive material. When a closure plate is open the suction draws air downwardly through the blast room and the grid floor and into the channel to clear the air in the blast room. The arrangement is such that every other channel has its closure plate open while the intervening channel cover plates are closed and the relative positions are continuously reversed during operation of the apparatus.
Inventors
- 👤 Leroy C Haker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:08
CPC Classifications
B; B24; B24C; B24C9/00; B24C9/003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
138 words
Apparatus for performing sand blasting operations comprising a sand blast room having a grid-like floor through which abrasive materials may fall during sand blasting, a plurality of parallel channels beneath said floor for receiving said materials, means for covering the upper sides of said channels and movable between channel closing and channel opening positions, said channels having air inlet openings at one end of each and duct means communicating with the opposite ends of said channels, suction means connected to said duct means for causing air flow through said channels to said suction means, and means for alternately opening and closing said channel covering means to produce maximum horizontal air flow through said channels when said means are closed and for producing purifying air flow downwardly from said room and through said floOr when said means are open.
Claim 2
Dependent Claim
138 words
Apparatus for performing sand blasting operations comprising a sand blast room having a grid-like floor through which abrasive materials may fall during sand blasting, a plurality of parallel channels beneath said floor for receiving said materials, means for covering the upper sides of said channels and movable between channel closing and channel opening positions, said channels having air inlet openings at one end of each and duct means communicating with the opposite ends of said channels, suction means connected to said duct means for causing air flow through said channels to said suction means, and means for alternately opening and closing said channel covering means to produce maximum horizontal air flow through said channels when said means are closed and for producing purifying air flow downwardly from said room and through said floOr when said means are open.
Claim 3
Dependent Claim
16 words
Apparatus according to claim 1 including means for continuously alternately opening and closing said covering means.
Claim 4
Dependent Claim
27 words
Apparatus according to claim 2 wherein the opening and closing means are arranged so that alternate covering means are closed when the intervening covering means are closed.
Claim 5
Dependent Claim
141 words
Apparatus for performing sand blasting operations comprising a sand blast room having a grid-like floor through which abrasive materials may fall during said blasting, a plurality of parallel channels beneath said floor for receiving said materials, cover plates at the upper portions of said channels movable between horizontal channel closing positions and inclined channel opening positions, said channels having air inlet openings at one end of each and duct means communicating with the opposite ends of said channels, suction means connected to said duct means for causing air flow through said channels to said suction means, and means for alternately opening and closing said cover plates to produce maximum horizontal air flow through said channels when said cover plates are closed and for producing purifying air flow downwardly from said room and through said floor when said cover plates are open.
Claim 6
Dependent Claim
141 words
Apparatus for performing sand blasting operations comprising a sand blast room having a grid-like floor through which abrasive materials may fall during said blasting, a plurality of parallel channels beneath said floor for receiving said materials, cover plates at the upper portions of said channels movable between horizontal channel closing positions and inclined channel opening positions, said channels having air inlet openings at one end of each and duct means communicating with the opposite ends of said channels, suction means connected to said duct means for causing air flow through said channels to said suction means, and means for alternately opening and closing said cover plates to produce maximum horizontal air flow through said channels when said cover plates are closed and for producing purifying air flow downwardly from said room and through said floor when said cover plates are open.
Claim 7
Dependent Claim
16 words
Apparatus according to claim 4 including means for continuously alternately opening and closing said cover plates.
Claim 8
Dependent Claim
32 words
Apparatus according to claim 5 wherein the cover plate opening and closing means are arranged so that alternate cover plates are closed when the intervening cover plates are closed and vice versa.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |