US4056376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter
Assignee: Pall Filtration and Separations Group Inc
•
Filing: 1975-11-14
•
Granted: 1977-11-01
•
Expires: 1995-11-14
Abstract
Abstract A fluid filter and a method for making it. The filter comprises a one-piece container having one open surface, a pleated filter element fitting in the container, and a cover fitting over the container's open surface. A trough in the container receives and positions three side edges of the filter element, and a mating channel in the cover receives and positions the element's remaining side edge. Fluid tight seals secure the four edges of the filter element in the trough and channel and secure the cover to the container.
Inventors
- 👤 Raymond E. Schuldenfrei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:55
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/0002; B01D46/0005; B01D46/0012; B01D46/10; B01D2277/00; B01D2277/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
205 words
A fluid filtering device comprising: A. a unitary container having an integral port and defining a cubic volume with at least one open surface; B. a continuous three section trough integral within the container and adapted to receive and position three side edges of a pleated filter media element; C. an adhesive substantially simultaneously deposited in the three sections of the trough in its gooey, uncured state; D. a three dimensional pleated filter element having two flat planar side edges and an upper zigzag side edge and a lower zigzag side edge, three of the filter element's side edges being inserted in the goo containing trough so as to simultaneously seal three edges of the filter element to three corresponding sides of the trough, the seal becoming permanent when the goo has been allowed to cure; E. a cover secured to the open surface of the container, the cover having an integral port and a channel mateable with the container's trough for receiving and positioning the remaining unsealed side edge of the filter element; and F. sealing means within the channel for providing a fluid type seal between the cover and 1 the container and 2 the remaining unsealed side edge of the filter element.
Claim 2
Dependent Claim
205 words
A fluid filtering device comprising: A. a unitary container having an integral port and defining a cubic volume with at least one open surface; B. a continuous three section trough integral within the container and adapted to receive and position three side edges of a pleated filter media element; C. an adhesive substantially simultaneously deposited in the three sections of the trough in its gooey, uncured state; D. a three dimensional pleated filter element having two flat planar side edges and an upper zigzag side edge and a lower zigzag side edge, three of the filter element's side edges being inserted in the goo containing trough so as to simultaneously seal three edges of the filter element to three corresponding sides of the trough, the seal becoming permanent when the goo has been allowed to cure; E. a cover secured to the open surface of the container, the cover having an integral port and a channel mateable with the container's trough for receiving and positioning the remaining unsealed side edge of the filter element; and F. sealing means within the channel for providing a fluid type seal between the cover and 1 the container and 2 the remaining unsealed side edge of the filter element.
Claim 3
Dependent Claim
203 words
A fluid filtering device comprising: A. a unitary container having integral inlet and exhaust ports, the container having one open surface, yet defining a cubic volume; B. a continuous three section trough integral within the container and adapted to receive and position three side edges of a pleated filter media element; C. an adhesive substantially simultaneously deposited in the three section of the trough in its gooey, uncured state; D. a three dimensional pleated filter element having 2 flat planar side edges and an upper zigzag side edge and a lower zigzag side edge, three of the filter element's side edges being inserted in the goo containing trough so as to simultaneously seal three edges of the filter element to three corresponding sides of the trough, the seal becoming permanent when the goo has been allowed to cure; E. a cover secured to the open surface of the container, the cover having a channel mateable with the container's trough for receiving and positioning the remaining unsealed side edge of the filter element; and F. sealing means within the channel for providing a fluid type seal between the cover and (1) the container and (2) the remaining unsealed side edge of the filter element.
Claim 4
Dependent Claim
203 words
A fluid filtering device comprising: A. a unitary container having integral inlet and exhaust ports, the container having one open surface, yet defining a cubic volume; B. a continuous three section trough integral within the container and adapted to receive and position three side edges of a pleated filter media element; C. an adhesive substantially simultaneously deposited in the three section of the trough in its gooey, uncured state; D. a three dimensional pleated filter element having 2 flat planar side edges and an upper zigzag side edge and a lower zigzag side edge, three of the filter element's side edges being inserted in the goo containing trough so as to simultaneously seal three edges of the filter element to three corresponding sides of the trough, the seal becoming permanent when the goo has been allowed to cure; E. a cover secured to the open surface of the container, the cover having a channel mateable with the container's trough for receiving and positioning the remaining unsealed side edge of the filter element; and F. sealing means within the channel for providing a fluid type seal between the cover and (1) the container and (2) the remaining unsealed side edge of the filter element.
Claim 5
Independent Claim
160 words
A method for making a filter device comprising the steps of: A. providing a three dimensional pleated filter element having two flat planar side edges and an upper zigzag side edge and a lower zigzag side edge; B. providing a container with a port, one open surface, and an integrally molded continuous trough, the continuous trough having three sections adapted to receive and position three corresponding side edges of the filter element; C. substantially simultaneously depositing a gooey adhesive in the three sections of the trough; D. inserting the filter element in the trough after step (C) so as to simultaneously seal three edges of the filter element to three corresponding sections of the trough; E. allowing the adhesive to cure to a firm state after step (D); and F. sealing a cover, having an integral port and a channel mateable with the trough, across the container's open surface and to the remaining unsealed side edge of the filter element.
Claim 6
Independent Claim
160 words
A method for making a filter device comprising the steps of: A. providing a three dimensional pleated filter element having two flat planar side edges and an upper zigzag side edge and a lower zigzag side edge; B. providing a container with a port, one open surface, and an integrally molded continuous trough, the continuous trough having three sections adapted to receive and position three corresponding side edges of the filter element; C. substantially simultaneously depositing a gooey adhesive in the three sections of the trough; D. inserting the filter element in the trough after step (C) so as to simultaneously seal three edges of the filter element to three corresponding sections of the trough; E. allowing the adhesive to cure to a firm state after step (D); and F. sealing a cover, having an integral port and a channel mateable with the trough, across the container's open surface and to the remaining unsealed side edge of the filter element.
Claim 7
Independent Claim
171 words
A method for making a filter device comprising steps of: A. providing a three dimensional pleated filter element having two flat planar side edges and an upper zigzag side edge and a lower zigzag side edge; B. providing a unitary container having integral inlet and exhaust ports, the container having one open surface and yet defining a cubic volume and the container having an integrally molded continuous trough, the continuous trough having three sections adapted to receive and position three corresponding side edges of the filter element; c. substantially simultaneously depositing a gooey adhesive in the three sections of the trough; D. inserting the filter element in the trough after step (C) so as to simultaneously seal three edges of the filter element to three corresponding sections of the trough; E. allowing the adhesive to cure to a firm state after step (D); and F. sealing a cover having a channel mateable with the trough across the container's open surface and to the remaining unsealed side edge of the filter element.
Claim 8
Independent Claim
171 words
A method for making a filter device comprising steps of: A. providing a three dimensional pleated filter element having two flat planar side edges and an upper zigzag side edge and a lower zigzag side edge; B. providing a unitary container having integral inlet and exhaust ports, the container having one open surface and yet defining a cubic volume and the container having an integrally molded continuous trough, the continuous trough having three sections adapted to receive and position three corresponding side edges of the filter element; c. substantially simultaneously depositing a gooey adhesive in the three sections of the trough; D. inserting the filter element in the trough after step (C) so as to simultaneously seal three edges of the filter element to three corresponding sections of the trough; E. allowing the adhesive to cure to a firm state after step (D); and F. sealing a cover having a channel mateable with the trough across the container's open surface and to the remaining unsealed side edge of the filter element.
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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |