Patent US3707046A successfully refreshed from Google Patents.
US3707046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal filter holding frame and media assembly
Assignee: FACET SERVODYNE Inc A CORP OF
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Filing: 1971-02-16
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Granted: 1972-12-26
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Expires: 1991-02-16
Abstract
Abstract A universal open-ended filter holding frame structure is assembled from specially shaped support components which are snapped together or to similarly shaped peripheral seals or slides at duct or plenum chamber walls by semi-rigid channels that provide positive air seals between the assembled components. Interference type locking clips releasably hold filter media units in the holding frame structure.
Inventors
- 👤 Kenneth W De Baun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:27
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/12; F; F24; F24F; F24F13/00; F24F13/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
176 words
An improved gas filter structure mountable within a duct, plenum chamber or the like comprising at least two adjacent open-ended filter units each having a peripheral border and filter media disposed therewithin; a separate open-ended rigid holding frame disposed around the periphery of each of said filter units and having an integral locking flange, an inwardly-turned seating ledge, and a ribbed locking groove near the seating ledge, the locking flanges of the holding frames for adjacent filter units abutting one another at least along one side of said units; a semi-rigid locking channel resiliently embracing the aforesaid abutting locking flanges of adjacent holding frames to seal them together; and a plurality of angular locking clips securing the filter units in their respective frames, each having a first leg ribbed for locking interference with the corresponding locking groove and a second leg inwardly-turned and normally substantially parallel to said seating ledge to hold the border of one of said filter units against the seating ledge when the first leg is pressed into engagement with said locking groove.
Claim 2
Dependent Claim
176 words
An improved gas filter structure mountable within a duct, plenum chamber or the like comprising at least two adjacent open-ended filter units each having a peripheral border and filter media disposed therewithin; a separate open-ended rigid holding frame disposed around the periphery of each of said filter units and having an integral locking flange, an inwardly-turned seating ledge, and a ribbed locking groove near the seating ledge, the locking flanges of the holding frames for adjacent filter units abutting one another at least along one side of said units; a semi-rigid locking channel resiliently embracing the aforesaid abutting locking flanges of adjacent holding frames to seal them together; and a plurality of angular locking clips securing the filter units in their respective frames, each having a first leg ribbed for locking interference with the corresponding locking groove and a second leg inwardly-turned and normally substantially parallel to said seating ledge to hold the border of one of said filter units against the seating ledge when the first leg is pressed into engagement with said locking groove.
Claim 3
Dependent Claim
65 words
The improved filter structure of claim 1 wherein the ribs on the first leg of said locking clip move into locking interference with the ribs of said locking groove by pressure applied substantially axially along the first leg and disengage from locking interference with the ribs of said locking groove by pressure applied to the second leg remote from its juncture with the first leg.
Claim 4
Dependent Claim
84 words
The improved gas filter structure of claim 1 further comprising a slide track affixed to the duct at least on a pair of opposite sides of the holding frame; a pair of slides mounted within each of the slide tracks and having at least one locking flange abutting the locking flange of the holding frame on each of said slides; and semi-rigid locking channels embracing the aforesaid abutting locking flanges of the slide and the holding frame to seal said slide to said frame.
Claim 5
Dependent Claim
66 words
The improved gas filter structure of claim 1 further comprising a rigid perimeter seal disposed around said holding frame and having a sealing surface affixed to the duct and at least one locking flange offset from sAid sealing surface; and a semi-rigid locking channel resiliently embracing the locking flanges both of the perimeter seal and of the holding frame to seal said frame to the duct.
Claim 6
Dependent Claim
58 words
The improved filter structure of claim 4 wherein the perimeter seal and holding frame each have a pair of locking flanges one on each side of a seating ledge formed on the frame; and there are a pair of corresponding semi-rigid locking channels resiliently embracing corresponding ones of the locking flanges of the perimeter seal and holding frame.
Claim 7
Dependent Claim
51 words
The improved gas filter structure of claim 1 wherein the holding frames of adjacent filter units have a pair of locking flanges one on each side of the seating ledge; and there are a pair of semi-rigid locking channels embracing the aforesaid abutting locking flanges to secure adjacent holding frames together.
Claim 8
Dependent Claim
41 words
The filter structure of claim 6 wherein each holding frame has a pair of locking flanges and there is a locking channel embracing each pair of abutting locking flanges of adjacent holding frames to lock them together in two air-tight seals.
Claim 9
Dependent Claim
36 words
The filter structure of claim 6 wherein adjacent filter holding frames define between one another and their pair of abutting locking flanges, a cavity external to gas flow through the filter assembly for receiving stiffening members.
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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |