US3890072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming solid spherical pellets
Assignee: Saint Gobain Abrasives Inc
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Filing: 1973-09-04
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Granted: 1975-06-17
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Expires: 1993-09-04
Abstract
Abstract Method and means of forming solid substantially spherical pellets from droplets of a slurry of finely divided solid aluminous particles and a deflocculant, delivered by gravity to and along a heated sloping surface at a temperature and of a length sufficient to dry the droplets of slurry en route therealong, and thereafter fired at the temperature and for the time necessary to fully develop high compressive strength and high temperature resistance therein.
Inventors
- 👤 Ronald E Barks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:33
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1409; C09K3/1418; B; B01; B01J; B01J2/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
An apparatus for forming substantially spherical solid pellets from droplets of a slurry of finely divided solid aluminous particles comprising a supporting means having a continuous smoothly contoured upper surface extending between a relatively higher upper end and a relatively depressed lower end thereof exposed along its entire length to the ambient pressure of a normal atmospheric environment, and a means for depositing droplets of said slurry upon the upper surface of said supporting means a drying means disposed adjacent to said supporting means and operative upon said droplets adjacent to the upper end of said supporting means so as to convert said droplets to dry relatively hard pellets by the time they slide down the upper surface of said supporting means to its lower end.
Claim 2
Independent Claim
126 words
An apparatus for forming substantially spherical solid pellets from droplets of a slurry of finely divided solid aluminous particles comprising a supporting means having a continuous smoothly contoured upper surface extending between a relatively higher upper end and a relatively depressed lower end thereof exposed along its entire length to the ambient pressure of a normal atmospheric environment, and a means for depositing droplets of said slurry upon the upper surface of said supporting means a drying means disposed adjacent to said supporting means and operative upon said droplets adjacent to the upper end of said supporting means so as to convert said droplets to dry relatively hard pellets by the time they slide down the upper surface of said supporting means to its lower end.
Claim 3
Dependent Claim
68 words
An apparatus for forming substantially spherical solid pellets from droplets of a slurry of finely divided solid aluminous particles, as described in claim 1, wherein: the upper surface of said supporting means is transversely upwardly curvilinearly shaped at least adjacent the upper end of said supporting means, and the succession of droplets is deposited substantially tangentially of the transversely upwardly curvilinearly shaped upper end of said supporting means.
Claim 4
Independent Claim
69 words
An apparatus for forming substantially spherical solid pellets from droplets of a slurry of finely divided solid aluminous particles, as described in clain 1, wherein: the upper surface of said supporting means is upwardly curvilinearly shaped lengthwise thereof toward the vertical adjacent the upper end of said supporting means, and the succession of droplets is deposited substantially tangentially of the upwardly curvilinearly shaped upper end of said supporting means.
Claim 5
Independent Claim
69 words
An apparatus for forming substantially spherical solid pellets from droplets of a slurry of finely divided solid aluminous particles, as described in clain 1, wherein: the upper surface of said supporting means is upwardly curvilinearly shaped lengthwise thereof toward the vertical adjacent the upper end of said supporting means, and the succession of droplets is deposited substantially tangentially of the upwardly curvilinearly shaped upper end of said supporting means.
Claim 6
Dependent Claim
74 words
An apparatus for forming substantially spHerical solid pellets from droplets of a slurry of finely divided solid aluminous particles, as described in claim 1, wherein: the upper surface of said supporting means is contoured to form a series of individual channels, each extending substantially from the upper end to the lower end of said supporting means, and a succession of droplets is deposited in each channel adjacent the upper end of said supporting means.
Claim 7
Dependent Claim
58 words
An apparatus for forming substantially spherical solid pellets from droplets of a slurry of finely divided solid aluminous particles, as described in claim 1, wherein: the upper surface of said supporting means is conically shaped, and a succession of droplets is deposited adjacent the upper extremity of the conical shape comprising the upper surface of said supporting means.
Claim 8
Dependent Claim
52 words
An apparatus for forming substantially spherical solid pellets from droplets of a slurry of finely divided solid aluminous particles, as described in claim 1, wherein: said drying means comprises at least one heat source disposed beneath the upper surface of said supporting means between the upper end and the lower end thereof.
Claim 9
Dependent Claim
78 words
An apparatus for forming substantially spherical solid pellets from droplets of a slurry of finely divided solid aluminous particles, as described in claim 6, and in addition: a heat reflective member with a lower surface disposed above and spaced from the upper surface of said supporting means a distance at least sufficient for the free passage of a succession of droplets between the upper surface of said supporting means and the lower surface of said heat reflective member.
Claim 10
Dependent Claim
52 words
An apparatus for forming substantially spherical solid pellets from droplets of a slurry of finely divided solid aluminous particles, as described in claim 1, wherein: said drying means comprises at least one heat source disposed above the upper surface of said supporting means between the upper end and the lower end thereof.
Claim 11
Dependent Claim
78 words
An apparatus for forming substantially spherical solid pellets from droplets of a slurry of finely divided solid aluminous particles, as described in claim 8, and in addition: a heat reflective member with a lower surface disposed above and spaced from the upper surface of said supporting means a distance at least sufficient for the free passage of a succession of droplets between the upper surface of said supporting means and the lower surface of said heat reflective member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |