US3768174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidised bed device
Assignee: Sulzer Escher Wyss AG
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Filing: 1972-04-19
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Granted: 1973-10-30
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Expires: 1992-04-19
Abstract
Abstract Fluidised bed device for draining and/or cooling fine granular products, having a perforated bed and a chest for supplying air into said bed; the assembly of said bed and said chest supported by springs on a stationary frame; a vibrator causing vibration of said assembly; one of said springs being a helical spring arranged perpendicular to the centre of gravity of said assembly and bearing the weight of said assembly; the other of said springs being plate springs arranged remote from said helical spring and guiding said assembly relatively to said frame.
Inventors
- 👤 J Biaggi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:38
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/16; B; B06; B06B; B06B3/00; B65; B65G; B65G27/00; F26; F26B; F26B3/00; F26B3/02; F26B3/06; F26B3/08; F26B3/092; F26B3/0923; B65G2812/00; B65G2812/03; B65G2812/0348; B65G2812/0364
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
A fluidised bed device for drying and/or cooling fine granular products comprising a. a stationary frame; b. an assembly including a bed for transporting said products which is provided with a perforated bottom, and an air chest located below said bottom; c. a vibrator for subjecting the assembly to undirectional vibration; d. first spring means located in a vertical plane containing the center of gravity of the assembly and serving to support the assembly on the frame, the spring means being elastic in the vertical direction and being yieldable in the direction of vibration; and e. second spring means spaced from the first spring means in the direction of vibration and reacting between the frame and the assembly to guide the latter during vibratory motion, the second spring means being elastic in the direction of vibration and rigid in a direction normal thereto.
Claim 2
Dependent Claim
143 words
A fluidised bed device for drying and/or cooling fine granular products comprising a. a stationary frame; b. an assembly including a bed for transporting said products which is provided with a perforated bottom, and an air chest located below said bottom; c. a vibrator for subjecting the assembly to undirectional vibration; d. first spring means located in a vertical plane containing the center of gravity of the assembly and serving to support the assembly on the frame, the spring means being elastic in the vertical direction and being yieldable in the direction of vibration; and e. second spring means spaced from the first spring means in the direction of vibration and reacting between the frame and the assembly to guide the latter during vibratory motion, the second spring means being elastic in the direction of vibration and rigid in a direction normal thereto.
Claim 3
Dependent Claim
37 words
A fluidised bed device as defined in claim 1 in which the second spring means is defined by two sets of springs located, respectively, at opposite sides of the first spring means in the direction of vibration.
Claim 4
Dependent Claim
33 words
A fluidised bed device as defined in claim 1 in which the vibrator is coupled to the assembly by force-imparting means connected to the assembly in the region of its center of gravity.
Claim 5
Dependent Claim
58 words
A fluidised bed device as defined in claim 3 in which a. the vibrator comprises at least one vibration-generating unit mounted on the frame; and b. the force-imparting means comprises a thrust rod connected at one end to the assembly in the region of its center of gravity and coupled at its opposite end to said generating unit.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |