US3672507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter apparatus and method
Assignee: HENRY PAULL JR
•
Filing: 1970-04-20
•
Granted: 1972-06-27
•
Expires: 1990-04-20
Abstract
Abstract An apparatus and method for filtering hot fluid material including a filter system having a filter formed from a continuous screen passing through a closed cavity through which the material flows. The cavity is defined by a cover and bottom member having sealing members which engage the screen to define the filter portion of the screen disposed within the cavity. The filter may be changed rapidly without cooling of the filter unit simply by loosening the bottom from the cover thereby releasing the screen and pulling the screen through the cavity until a clean portion thereof is disposed in position to be engaged by the sealing members to form a filter therefrom.
Inventors
- 👤 Henry Paull Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:50
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/09; B01D29/096; B01D29/60; B01D29/606; B01D29/76; B01D29/80; B01D29/84; B01D29/846; B01D35/00; B01D35/12; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/69; B29C48/692; B29C48/03; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
31 words
A system in accordance with claim 1 including means releasably affixing said bottom member to said cover member to cause said sealing elements to engage said screen and form said filter.
Claim 2
Dependent Claim
26 words
A system in accordance with claim 1 including means heating said filter unit and to facilitate passage of the hot fluid material therethrough at selected temperatures.
Claim 3
Dependent Claim
21 words
A system in accordance with claim 1 wherein said screen supporting means includes a plurality of intersecting members defining a grid.
Claim 4
Dependent Claim
21 words
A system in accordance with claim 4 wherein the spacing between adjacent support members is on the order of 1 inch.
Claim 5
Dependent Claim
76 words
A sYstem in accordance with claim 1 wherein said sealing means includes complementary sealing elements disposed adjacent the periphery of said cavity in each of said members, one of said sealing elements including gasket means disposed in one of said members and the other of said sealing elements including a raised bead formed in the other of said members and engagable with said gasket means, said screen passing between said gasket means and said raised bead.
Claim 6
Dependent Claim
34 words
A system as claimed in claim 1 wherein said screen is of a mesh size to prevent passage therethrough of constituents of said hot fluid material having a size greater than about 0.005 inch.
Claim 7
Independent Claim
230 words
A method for continuously filtering hot fluid material wherein said hot fluid material is selectively supplied to each of a plurality of filter units for removing therefrom constituents having a size greater than about 0.005 inch, including the steps of passing through each of said filter units a continuous web of screen material having a mesh size capable of preventing passage of said constituents therethrough; sealing a portion of said screen material within said filtering unit to form a filter therefrom; supporting said filter portion in operative position within said filtering unit to permit a pressure differential thereacross of at least about 200 pounds per square inch; supplying said hot fluid material to one of said filter units at a rate up to about 2,500 pounds per hour; selectively switching the supply of hot fluid material from said one unit to another of said units; releasing said screen material in said one unit while the temperature internally thereof is sufficiently high to maintain the fluid material in a fluid state; transporting said screen material through said one filter unit until the clogged portion thereof passes from said unit and another portion thereof is disposed therein; closing said filter system to seal another portion of said screen in said unit to form a filter therefrom, whereby said coating material may continuously be supplied through at least one of said filter units.
Claim 8
Dependent Claim
26 words
A method as claimed in claim 8 wherein said fluid material is asphalt supplied at a temperature of between about 300* F to about 400* F.
Claim 9
Dependent Claim
13 words
A method as claimed in claim 8 wherein said fluid material is polypropylene.
Claim 10
Dependent Claim
26 words
A method as claimed in claim 8 including the step of selectively externally heating each of said filter units to maintain said units at desired temperatures.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |