Patent US3832005A successfully refreshed from Google Patents.
US3832005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loader
Assignee: Universal Dynamics Corp
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Filing: 1972-05-24
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Granted: 1974-08-27
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Expires: 1992-05-24
Abstract
Abstract A loader of the type particularly useful in a dryer of the type which includes a vacuum operated loading chamber is disclosed. Material is drawn into the loading chamber through the action of a vacuum which is drawn on the loading chamber. The vacuum line, which is connected to the chamber, operates through a filter which prevents the material to be loaded from entering the vacuum line. In accordance with the present invention, the vacuum line is caused to operate through a pneumatic switch which periodically reverses the flow of air through the filter thus cleaning it. The cleaning or blowback operation is an improvement over prior art systems which perform the operation of reversing the air current to clean the filter by stopping the motor which was driving the vacuum blower and electrically reversing it. Thus, the present invention greatly increases system life by eliminating the wear and tear concomitant with the braking, reversing and restarting of the blower motor.
Inventors
- 👤 H Hek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:37
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/60; B01; B01D; B01D46/00; B01D46/42; B01D46/44; B01D46/46; B65G53/66
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
257 words
In a pneumatic loader for loading particulate material from a particulate material source, said pneumatic loader having a loading chamber including a material inlet, filter means associated with said loading chamber, and means for providing pneumatic drive to said loading chamber through said filter means, the improvement comprising: pneumatic switch means cooperating with said pneumatic drive providing means for alternately providing suction on said loading chamber for loading said particulate material from said source through said inlet into said loading chamber, or for providing pneumatic pressure to said filter means and loading chamber blowing back said filter means, said pneumatic switch means comprising: a pneumatic vacuum chamber having a first orifice for communicating with said loading chamber, and a second orifice for communicating with outside atmosphere; a pneumatic pressure chamber having a third orifice for communicating with said loading chamber, and a fourth orifice for communicating with said outside atmosphere; and sealing means including a first ball member alternatively positionable for sealing said second orifice or said first orifice, and a second ball member alternatively positionable for sealing said third orifice or said fourth orifice; and means for positioning said sealing means into a first position maintaiing said first ball member in sealing engagement with said second orifice while maintaining said second ball member in sealing engagement with said third orifice, and also for positioning said sealing means into a second position maintaining said first ball member in sealing engagement with said first orifice while maintaining said second ball member in sealing engagement with said fourth orifice.
Claim 2
Dependent Claim
257 words
In a pneumatic loader for loading particulate material from a particulate material source, said pneumatic loader having a loading chamber including a material inlet, filter means associated with said loading chamber, and means for providing pneumatic drive to said loading chamber through said filter means, the improvement comprising: pneumatic switch means cooperating with said pneumatic drive providing means for alternately providing suction on said loading chamber for loading said particulate material from said source through said inlet into said loading chamber, or for providing pneumatic pressure to said filter means and loading chamber blowing back said filter means, said pneumatic switch means comprising: a pneumatic vacuum chamber having a first orifice for communicating with said loading chamber, and a second orifice for communicating with outside atmosphere; a pneumatic pressure chamber having a third orifice for communicating with said loading chamber, and a fourth orifice for communicating with said outside atmosphere; and sealing means including a first ball member alternatively positionable for sealing said second orifice or said first orifice, and a second ball member alternatively positionable for sealing said third orifice or said fourth orifice; and means for positioning said sealing means into a first position maintaiing said first ball member in sealing engagement with said second orifice while maintaining said second ball member in sealing engagement with said third orifice, and also for positioning said sealing means into a second position maintaining said first ball member in sealing engagement with said first orifice while maintaining said second ball member in sealing engagement with said fourth orifice.
Claim 3
Dependent Claim
40 words
The improvement of claim 1 wherein said first ball member comprises a first rubber ball adjustably mounted in said pneumatic vacuum chamber and wherein said second ball member comprises a second rubber ball adjustably mounted in said pneumatic pressure chamber.
Claim 4
Dependent Claim
28 words
The improvement as in claim 2 further comprising lever means for moving said balls into either said first position or said second position to achieve loading and blowback.
Claim 5
Dependent Claim
46 words
The improvement of claim 3 wherein said lever means comprises a rotatable lever coupled to said rubber balls, spring means for biasing said rubber balls toward said first position, and solenoid means for rotating said rotatable lever and maintaining said rubber balls in said second position.
Claim 6
Dependent Claim
27 words
The improvement as in claim 4 further comprising control circuit means for actuating said solenoid and controlling the time in said first and said second operative positions.
Claim 7
Dependent Claim
43 words
The improvement as in claim 5 further comprising a first timer for controlling the time that said sealing means is in said first operative position and second timer means for controlling the time that said sealing means is in said second operative position.
Claim 8
Dependent Claim
234 words
A pneumatic loading apparatus for loading particulate material from a particulate material source comprising: a loading chamber having inlet means for receiving said particulate material from said particulate material source; filter means; a filter chamber for housing said filter means, said filter chamber mounted on said loading chamber and communicating therewith through said filter means; pneumatic switch means comprising a pressure chamber and a vacuum chamber, both said vacuum and pressure chambers communicating directly with said filter chamber; first orifice means in said vacuum chamber for communicating with said loading chamber; second orifice means in said vacuum chamber for communicating with the outside atmosphere surrounding said pneumatic switch means; third orifice means in said prEssure chamber for communicating with said loading chamber; fourth orifice means in said pressure chamber for communicating with said outside atmosphere; means for providing pneumatic pressure to said pressure chamber and pneumatic suction to said vacuum chamber; bistable sealing means disposed within said pressure and vacuum chambers for sealing said second orifice means and said third orifice means in a first operative position for pneumatically loading said particulate material into said loading chamber, and for alternately sealing said first orifice means and said fourth orifice means in a second operative position for blowing back and cleaning said filter means; and means for alternating said bistable sealing means from one of said operative positions to the other of said operative positions.
Claim 9
Dependent Claim
234 words
A pneumatic loading apparatus for loading particulate material from a particulate material source comprising: a loading chamber having inlet means for receiving said particulate material from said particulate material source; filter means; a filter chamber for housing said filter means, said filter chamber mounted on said loading chamber and communicating therewith through said filter means; pneumatic switch means comprising a pressure chamber and a vacuum chamber, both said vacuum and pressure chambers communicating directly with said filter chamber; first orifice means in said vacuum chamber for communicating with said loading chamber; second orifice means in said vacuum chamber for communicating with the outside atmosphere surrounding said pneumatic switch means; third orifice means in said prEssure chamber for communicating with said loading chamber; fourth orifice means in said pressure chamber for communicating with said outside atmosphere; means for providing pneumatic pressure to said pressure chamber and pneumatic suction to said vacuum chamber; bistable sealing means disposed within said pressure and vacuum chambers for sealing said second orifice means and said third orifice means in a first operative position for pneumatically loading said particulate material into said loading chamber, and for alternately sealing said first orifice means and said fourth orifice means in a second operative position for blowing back and cleaning said filter means; and means for alternating said bistable sealing means from one of said operative positions to the other of said operative positions.
Claim 10
Dependent Claim
45 words
Apparatus as in claim 7 wherein said sealing means comprises a first rubber ball positionable in said vacuum chamber and a second rubber ball positionable in said pressure chamber for alternately sealing said second and third orifice means or said first and fourth orifice means.
Claim 11
Dependent Claim
51 words
Apparatus as in claim 7 wherein said alternating means comprises rotatable lever means connected to said bistable sealing means, resilient means for biasing said bistable sealing means toward said first operative position, and solenoid means for rotating said lever means and moving said bistable sealing means to said second operative position.
Claim 12
Dependent Claim
27 words
Apparatus as in claim 9 further comprising control circuit means for actuating said solenoid means and controlling the time in said first and said second operative positions.
Claim 13
Dependent Claim
42 words
Apparatus as in claim 10 further comprising a first timer for controlling the time that said sealing means is in said first operative position and second timer means for controlling the time that said sealing means is in said second operative position.
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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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |