US3633751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamina plate filter
Assignee: Individual
•
Filing: 1969-05-08
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Granted: 1972-01-11
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Expires: 1989-05-08
Abstract
Abstract Filter elements are provided for use in filtration of fluids, such as petrol, water and air, being made of a pack of laminae with filter gaps designed to facilitate release of entrained material on backflow. Also an associated backflow device is provided which uses a hollow spiral wiping arm to backwash a set of filters sequentially.
Inventors
- 👤 Ronald John Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:07
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/44; B01D29/46; B01D35/00; B01D35/06; B01D39/00; B01D39/14; B03; B03C; B03C1/00; B03C1/02; B03C1/025; B03C1/031; B03C1/033; B03C1/0335; B03C1/034; B03C1/28; B03C1/286; B03C2201/00; B03C2201/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
193 words
A filter comprising a pack of laminae, means forming inflow and outflow passages in said pack, filtering passage means connecting said inflow and outflow passage means, said filtering passage means comprising perforations in said individual lamina with said lamina stacked together having said perforations aligned in predetermined positions to form flow passages, a first specific lamina having a tongue member, filter gap means juxtaposed one surface of said tongue member, said tongue member being hinged on said first specific lamina whereby it moves toward and into said filter gap means during backflow of a fluid through the filter thus releasing any residue trapped by said tongue member during the forward flow of fluid through the flow passages of said filter, a second specific lamina juxtaposed said first specific lamina but on the surface opposite said filter gap means, said second specific lamina having a perforation positioned beneath said tongue member to form a part of said filtering passage means with said second specific lamina having means to prevent said tongue member from moving into said perforation in said second specific lamina during forward flow of fluid through the flow passages of said filter.
Claim 2
Dependent Claim
193 words
A filter comprising a pack of laminae, means forming inflow and outflow passages in said pack, filtering passage means connecting said inflow and outflow passage means, said filtering passage means comprising perforations in said individual lamina with said lamina stacked together having said perforations aligned in predetermined positions to form flow passages, a first specific lamina having a tongue member, filter gap means juxtaposed one surface of said tongue member, said tongue member being hinged on said first specific lamina whereby it moves toward and into said filter gap means during backflow of a fluid through the filter thus releasing any residue trapped by said tongue member during the forward flow of fluid through the flow passages of said filter, a second specific lamina juxtaposed said first specific lamina but on the surface opposite said filter gap means, said second specific lamina having a perforation positioned beneath said tongue member to form a part of said filtering passage means with said second specific lamina having means to prevent said tongue member from moving into said perforation in said second specific lamina during forward flow of fluid through the flow passages of said filter.
Claim 3
Dependent Claim
22 words
The filter of claim 1 in which the inflow and outflow passages through the individual lamina forming the pack are arranged serially.
Claim 4
Dependent Claim
41 words
The filter of claim 1 in which said first specific lamina having the tongue member is integrally formed from a material having physical properties which make said tongue flexibly deformable away from the plane of the lamina during the backflow operation.
Claim 5
Dependent Claim
27 words
The filter of claim 1 in which said tongue has a series of fine orifices formed therein whereby said tongue may hinge along the line of orifices.
Claim 6
Dependent Claim
30 words
The filter of claim 1 wherein the tip of the tongue member is provided with slits which provide additional surface area against which particles to be filtereD may be trapped.
Claim 7
Dependent Claim
51 words
The filter of claim 1 wherein said second specific lamina has means rising above the plane of its surface upon which said tongue member rests thus causing said tongue to be angularly positioned with respect to the plane of the laminae generally thus forming a wedge filter for trapping particles therein.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |