Patent US4759781A successfully refreshed from Google Patents.
US4759781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering and dust collecting apparatus
Assignee: Individual
•
Filing: 1987-03-09
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Granted: 1988-07-26
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Expires: 2007-03-09
Abstract
Abstract A dust collecting and filtering apparatus in connection with a particulate material processing apparatus to clean the dust laden air discharged by the grinding process of the apparatus consisting of a plurality of dust collectors in an independent operating arrangement, each collector having a tubular filter bag and having an inlet valve at the upper end thereof and having a discharge chamber having steeply sloped walls at the lower end of each filter bag and having an exhaust valve at the bottom thereof, an automatic timing arrangement operating the inlet and exhaust valves sequentially and a suction line in communication with said exhaust valves evacuating the dust collected in each dust collector.
Inventors
- 👤 Robert P. Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:51
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/42; B01D46/4272; B01D46/48; B01D46/56; B01D46/58; B01D46/66; B01D46/70; B01D46/90; B01D50/00; B01D50/20; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87917; Y10T137/87981
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
160 words
A filter and dust collection apparatus having in combination, a housing having ends, a chamber therein, and inlet and outlet sleeves in connection with said ends of said housing, a filter bag overlying the upper portion of said housing passing cleaned air therethrough, a lower portion of said chamber forming a dust collection portion of said chamber, an inlet valve member in said inlet sleeve for admitting dust laden air therein, a conduit passing dust laden air into said inlet sleeve member, an outlet valve member in said outlet sleeve for discharging from said dust collection portion of said chamber, an exhaust manifold in connection with said outlet sleeve, means exhausting said manifold, an operating rod directly connecting said inlet and outlet valves positioning the same in opposed operating positions, a servo motor in operating connection with said operating rod, and timing means operating said servo motor to operate said rod to open and close said valves at pre-set intervals.
Claim 2
Dependent Claim
160 words
A filter and dust collection apparatus having in combination, a housing having ends, a chamber therein, and inlet and outlet sleeves in connection with said ends of said housing, a filter bag overlying the upper portion of said housing passing cleaned air therethrough, a lower portion of said chamber forming a dust collection portion of said chamber, an inlet valve member in said inlet sleeve for admitting dust laden air therein, a conduit passing dust laden air into said inlet sleeve member, an outlet valve member in said outlet sleeve for discharging from said dust collection portion of said chamber, an exhaust manifold in connection with said outlet sleeve, means exhausting said manifold, an operating rod directly connecting said inlet and outlet valves positioning the same in opposed operating positions, a servo motor in operating connection with said operating rod, and timing means operating said servo motor to operate said rod to open and close said valves at pre-set intervals.
Claim 3
Dependent Claim
13 words
The structure of claim 1, including a plurality of housings in operative association.
Claim 4
Dependent Claim
25 words
The structure of claim 1, wherein said inlet and outlet valve members are respectively disposed such that when one is open the other is closed.
Claim 5
Dependent Claim
27 words
The structure of claim 1, including a plurality of housings in operative relationship, said conduit and said manifold being in operative relationship with each of said housings.
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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) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |