US3799221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collection system
Assignee: CONSOLIDATED ROCK PROD CO
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Filing: 1972-10-04
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Granted: 1974-03-26
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Expires: 1992-10-04
Abstract
Abstract There is provided a system for collecting dust during the filling of a mixer with cementitious materials. Basic to the system is a hopper having a conduit for transport of materials to the mixer, a seal which surrounds the outlet of the conduit and engages the inlet of the mixer and an exhaust duct having an inlet which faces the interior of the mixer and outlet for connection to a source of suction. Application of suction to the exhaust duct during filling of the mixer removes the dust generated during the filling of the mixer. The hopper may be used in conjunction with aggregate dispenser having a seal which contacts the periphery of the inlet of the hopper and an exhaust manifold which aids in exhausting dust and the air displaced during the filling operation.
Inventors
- 👤 C Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:28
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/18; B65G69/181; B65G69/182; B28; B28C; B28C5/00; B28C5/42; B28C5/4203; B28C5/4262
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
235 words
A dust collection system for use in removing dust during transfer of particulate matter to the inlet port of a rotatable mixer which comprises a transfer hopper for receiving and transferring dispensed particulate matter to the rotatable mixer and a dispenser having a discharge nozzle for dispensing particulate matter from an interconnected batch loading hopper to said transfer hopper, said transfer hopper comprising: a. a conduit providing open communication between the discharge nozzle of said dispenser and the inlet port of the mixer; b. seal means for contacting the periphery of the inlet port of said mixer surrounding the discharge end of said conduit; c. an exhaust duct having an inlet for facing an inlet of said mixer and an outlet for connection to suction means associated with said dispenser; d. means for mounting said transfer hopper on said rotatable mixer; and e. means for moving at least a portion of said seal means away from the periphery of the inlet port of said mixer; and said dispenser comprising: a. a discharge nozzle; b. second seal means for contacting the periphery of the inlet of said conduit in sealing relation; c. an annular manifold providing a plurality of ports adapted to be positioned within the periphery of the inlet of the conduit of said transfer hopper in facing relation to the inlet of the conduit; and d. means to connect said manifold to suction means.
Claim 2
Dependent Claim
235 words
A dust collection system for use in removing dust during transfer of particulate matter to the inlet port of a rotatable mixer which comprises a transfer hopper for receiving and transferring dispensed particulate matter to the rotatable mixer and a dispenser having a discharge nozzle for dispensing particulate matter from an interconnected batch loading hopper to said transfer hopper, said transfer hopper comprising: a. a conduit providing open communication between the discharge nozzle of said dispenser and the inlet port of the mixer; b. seal means for contacting the periphery of the inlet port of said mixer surrounding the discharge end of said conduit; c. an exhaust duct having an inlet for facing an inlet of said mixer and an outlet for connection to suction means associated with said dispenser; d. means for mounting said transfer hopper on said rotatable mixer; and e. means for moving at least a portion of said seal means away from the periphery of the inlet port of said mixer; and said dispenser comprising: a. a discharge nozzle; b. second seal means for contacting the periphery of the inlet of said conduit in sealing relation; c. an annular manifold providing a plurality of ports adapted to be positioned within the periphery of the inlet of the conduit of said transfer hopper in facing relation to the inlet of the conduit; and d. means to connect said manifold to suction means.
Claim 3
Dependent Claim
30 words
A dust collection system as claimed in claim 1 in which the seal means of said transfer hopper is supported by a flange surrounding the discharge end of said conduit.
Claim 4
Dependent Claim
30 words
A dust collection system as claimed in claim 1 in which the periphery of the inlet of said mixer is rotatably positioned against the seal means of said transfer hopper.
Claim 5
Dependent Claim
30 words
A dust collection system as claimed in claim 2 in which the periphery of the inlet of said mixer is rotatably positioned against the seal means of said transfer hopper.
Claim 6
Dependent Claim
35 words
A dust collection system as claimed in claim 2 in which the means to mount said hopper on said mixer includes means to pivotally rotate the transfer hopper outwardly from the inlet to said mixer.
Claim 7
Dependent Claim
27 words
A dust collection system as claimed in claim 1 in which the dispenser contains means to couple suction means to the exhaust duct of said transfer hopper.
Claim 8
Dependent Claim
29 words
A dust collection system as claimed in claim 6 in which the means to couple the suction means to said exhaust duct is in open communication with said manifold.
Claim 9
Dependent Claim
84 words
A dust collection system as claimed in claim 1 in which the exhaust duct is secured to the interior of the conduit of said transfer hopper, the outlet of said exhaust duct extending approximately to the inlet of said conduit and said dispenser being provided with at least one additional exhaust port for connection to suction means, said exhaust port in connecting communication with an aperture in said second seal means, said aperture being positioned for alignment with the outlet of said exhaust duct.
Claim 10
Dependent Claim
43 words
A dust collection system as claimed in claim 1 in which the conduit and duct of said transfer hopper extends into the interior of said mixer when the seal means is in contact with the periphery of the inlet port oF the mixer.
Claim 11
Dependent Claim
43 words
A dust collection system as claimed in claim 8 in which the conduit and duct of said transfer hopper extends into the interior of said mixer when the seal means is in contact with the periphery of the inlet port of the mixer.
Claim 12
Dependent Claim
29 words
A dust collection system claimed in claim 6 in which the manifold of said dispenser and the duct of said transfer hopper are connected to a common suction means.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |