Patent US3923343A successfully refreshed from Google Patents.
US3923343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boast assisted conveying system
Assignee: Keystone International Holdings Corp
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Filing: 1973-11-09
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Granted: 1975-12-02
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Expires: 1993-11-09
Abstract
Abstract A pneumatic system for transferring solid particulate or other materials from one location to another, by the use of a pressurized conveying vessel, a conveying line, and boosters located intermittently within said line. The supply flow rate of air or other fluid to each booster is automatically dependent upon the pressure sensed upstream, e.g. at the immediately previous booster or vessel.
Inventors
- 👤 Edwin Donald Bird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:05
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/66
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
A conveying system for conveying a mixture of fluid and particulate matter comprising: an upstream portion and a downstream portion, means for causing a mixture of fluid and particulate matter to flow continuously under pressure, through said upstream portion and into and through said downstream portion, and means for injecting additional fluid into said downstream portion, said injecting means including sensing means for sensing the pressure in said upstream portion, a variable opening valve for controlling the amount of fluid injected, and valve control means operably connected to said sensing means and to said valve, said valve control means including means for opening the valve in response to an increase in the sensed pressure, to further open the valve in response to a further increase in the sensed pressure, and to decrease the valve opening in response to a decrease in the sensed pressure.
Claim 2
Dependent Claim
144 words
A conveying system for conveying a mixture of fluid and particulate matter comprising: an upstream portion and a downstream portion, means for causing a mixture of fluid and particulate matter to flow continuously under pressure, through said upstream portion and into and through said downstream portion, and means for injecting additional fluid into said downstream portion, said injecting means including sensing means for sensing the pressure in said upstream portion, a variable opening valve for controlling the amount of fluid injected, and valve control means operably connected to said sensing means and to said valve, said valve control means including means for opening the valve in response to an increase in the sensed pressure, to further open the valve in response to a further increase in the sensed pressure, and to decrease the valve opening in response to a decrease in the sensed pressure.
Claim 3
Dependent Claim
287 words
In apparatus for conveying a mixture of gaseous fluid and particulate material comprising: a conveying vessel having an outlet, means for supplying gaseous fluid under pressure to said conveying vessel, and a conveying line attached to said outlet of said conveying vessel, the improvement which comprises a first booster located in said line, means connecting said first booster to a supply of gaseous fluid under pressure, a first regulating means for varying the flow of the supply of gaseous fluid to the first booster in response to variations in the fluid pressure within the conveying vessel, a second booster located in said conveying line at a point downstream from said first booster, means connecting said second booster to a supply of gaseous fluid under pressure, and a second regulating means for varying the flow of the supply of fluid to the second booster in response to variations in the fluid pressure at a point in said conveying line upsteam of said second booster, said first and second boosters including injector means for promoting the continuous flow of material and gaseous fluid through said conveying line by injecting such gaseous fluid into the conveying line, said regulating means each including sensing means for sensing the respective variations in pressure, a variable opening valve for controlling the amount of gaseous fluid injected by the injector means, and valve control means operably connected to said sensing means and to said valve, said valve control means including means for opening the valve in response to an increase in the sensed pressure, to further open the valve in response to a further increase in the sensed pressure, and to decrease the valve opening in reponse to a decrease in the sensed pressure.
Claim 4
Dependent Claim
287 words
In apparatus for conveying a mixture of gaseous fluid and particulate material comprising: a conveying vessel having an outlet, means for supplying gaseous fluid under pressure to said conveying vessel, and a conveying line attached to said outlet of said conveying vessel, the improvement which comprises a first booster located in said line, means connecting said first booster to a supply of gaseous fluid under pressure, a first regulating means for varying the flow of the supply of gaseous fluid to the first booster in response to variations in the fluid pressure within the conveying vessel, a second booster located in said conveying line at a point downstream from said first booster, means connecting said second booster to a supply of gaseous fluid under pressure, and a second regulating means for varying the flow of the supply of fluid to the second booster in response to variations in the fluid pressure at a point in said conveying line upsteam of said second booster, said first and second boosters including injector means for promoting the continuous flow of material and gaseous fluid through said conveying line by injecting such gaseous fluid into the conveying line, said regulating means each including sensing means for sensing the respective variations in pressure, a variable opening valve for controlling the amount of gaseous fluid injected by the injector means, and valve control means operably connected to said sensing means and to said valve, said valve control means including means for opening the valve in response to an increase in the sensed pressure, to further open the valve in response to a further increase in the sensed pressure, and to decrease the valve opening in reponse to a decrease in the sensed pressure.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |