US3729905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering device
Assignee: Laminar Flow Inc
•
Filing: 1970-08-20
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Granted: 1973-05-01
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Expires: 1990-08-20
Abstract
Abstract An air filtering device with its filter in a housing. The filter is restrained in the housing by the cooperation of opposed cylindrical members that bear against wedge-like surfaces so that the filter is urged against a support inside the housing.
Inventors
- 👤 A Diccianni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:16
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; Y; Y10; Y10S; Y10S55/00; Y10S55/18; Y10S55/29
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
162 words
A restraint for a filter of the type having a perimeter of rigid material comprising, a housing defining upper and lower plenum chambers with a filter housing disposed therebetween, said filter housing having means supporting a filter along its perimeter, means supported by said housing defining at least two oppositely inclined camming surfaces disposed in facing relation to said means supporting a filter, restraining means comprising at least two cam members coupled to each other, each of said cam members having a substantially peripheral surface, said peripheral surface on each of said cam members being engaged by one of said camming surfaces and being disposed between said camming surfaces and said means supporting a filter, means for displacing one of said cam members toward the other along their respective camming surfaces to displace them toward said means supporting a filter, and said restraining means includes means for resiliently urging said cam members along said camming surfaces toward said means supporting a filter.
Claim 2
Dependent Claim
162 words
A restraint for a filter of the type having a perimeter of rigid material comprising, a housing defining upper and lower plenum chambers with a filter housing disposed therebetween, said filter housing having means supporting a filter along its perimeter, means supported by said housing defining at least two oppositely inclined camming surfaces disposed in facing relation to said means supporting a filter, restraining means comprising at least two cam members coupled to each other, each of said cam members having a substantially peripheral surface, said peripheral surface on each of said cam members being engaged by one of said camming surfaces and being disposed between said camming surfaces and said means supporting a filter, means for displacing one of said cam members toward the other along their respective camming surfaces to displace them toward said means supporting a filter, and said restraining means includes means for resiliently urging said cam members along said camming surfaces toward said means supporting a filter.
Claim 3
Dependent Claim
52 words
A device as defined in claim 1 wherein said means for resiliently urging said cam members along said camming surfaces comprises an elongated member slidably connected to each of said cam members and having spring means in engagement with one of said cam members for urging it toward said other cam member.
Claim 4
Dependent Claim
33 words
A device as defined in claim 1 wherein said cam members are cylindrical in shape and are provided with flanges on their peripheral surfaces, is restrained on said means for supporting a filter.
Claim 5
Dependent Claim
66 words
A device as defined in claim 1 wherein each of said cam members is provided with openings in their peripheral surfaces, an elongated threaded shaft slidably received through said openings, means for constraining one of said cam members at one end os said shaft, and a spring at the other end of said shaft, said spring urging said other cam member toward said one cam member.
Claim 6
Dependent Claim
47 words
A device as defined in claim 1 wherein said filter housing includes opposed side walls, said camming surfaces being supported by said filter housing inwardly of said side walls, and at least two of said oppositely inclined camming surfaces are disposed adjacent each of said side walls.
Claim 7
Dependent Claim
51 words
A device as defined in claim 5 wherein each of said cam members has a cylindrical shape with a radially outwardly directed flange thereon, and said flanges are disposed intermediate said camming surfaces and said side walls to constrain the movement of said cam members along the perimeter of a filter.
References Cited (Backward Citations)
FR655121A
Cited
FR1324386A
Cited
US3383841A
Cited
US3360910A
Cited
US3423908A
Cited
US3426512A
Cited
US3434269A
Cited
US3470679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |