Patent JPS6214811A successfully refreshed from Google Patents.
US3824739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for continuously removing burrs from objects
Assignee: Air Liquide SA
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Filing: 1973-02-23
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Granted: 1974-07-23
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Expires: 1993-02-23
Abstract
Abstract A device for removing burrs from objects thermally insulated from the ambient air consists of subjecting the objects to a blast of granular shot, which is re-cycled after separating-out the removed burrs and is led back to a storage hopper, the shot being continuously insulated thermally from the ambient air and being cooled, simultaneously with the objects by a cold gas in the liquefied form or in course of vaporization. The apparatus comprises a shot-blasting chamber in the form of a heat-insulated tunnel containing a continuously moving conveyor belt on which the objects are disposed.
Inventors
- 👤 B Moret
- 👤 J Dufetele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:53
CPC Classifications
B; B24; B24C; B24C1/00; B24C1/08; B24C1/083; B23; B23P; B23P25/00; B24C3/00; B24C3/08; B24C3/10; B24C3/14; B24C3/18; B24C3/26; B24C3/263
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
A device for removing burrs from objects by projection of granular shot on said objects, previously cooled, at least at their surface, of the kind comprising a shot-blasting chamber, thermally insulated, means for projecting said shot, a re-cycling circuit for the shot projected from said chamber to a hopper adapted to supply said projection means, means for injecting a cryogenic liquid into said chamber, said device further comprising means for injecting said cryogenic fluid into said shot-recycling circuit, and especially into said supply hopper.
Claim 2
Independent Claim
84 words
A device for removing burrs from objects by projection of granular shot on said objects, previously cooled, at least at their surface, of the kind comprising a shot-blasting chamber, thermally insulated, means for projecting said shot, a re-cycling circuit for the shot projected from said chamber to a hopper adapted to supply said projection means, means for injecting a cryogenic liquid into said chamber, said device further comprising means for injecting said cryogenic fluid into said shot-recycling circuit, and especially into said supply hopper.
Claim 3
Dependent Claim
41 words
A device for continuously removing burrs from objects, as claimed in claim 1, said device further comprising a chamber in the form of a heat-insulated tunnel said tunnel comprising a conveyor belt in continuous movement, on which said objects are disposed.
Claim 4
Dependent Claim
38 words
A device as claimed in claim 2, said device further comprising means for putting said objects into contact with a liquefied gas, and means for previously putting said objects into contact with the vapours of said liquefied gas.
Claim 5
Dependent Claim
34 words
A device as claimed in claim 2, and further comprising means for causing said conveyor belt to vibrate at a position in which the objects carried are subjected to the jet of granular shot.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |