US3823533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter retainer
Assignee: Carrier Corp
•
Filing: 1973-09-27
•
Granted: 1974-07-16
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Expires: 1993-09-27
Abstract
Abstract A retaining bracket for use in holding filter material in a furnace or the like having a U-shaped rod biased into a pair of L-shaped openings in brackets spanning the filter.
Inventors
- 👤 R Alverson
- 👤 H Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:37
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
A filter retainer for use in holding and locking a sheet of filter material including a pair of brackets spaced apart in a position to secure a sheet of filter material, a pair of L-shaped openings in each bracket, extending from one edge of each bracket downward and then outward in opposite directions substantially parallel to the edge of the bracket, a U-shaped retaining rod extending between the brackets and having two legs each of which extend through one of the Lshaped openings in each bracket said legs being deflectable for insertion and removal from the L-shaped openings and sufficiently resilient to move apart into the bottom of the Lshaped openings to lock the retainer in place.
Claim 2
Dependent Claim
117 words
A filter retainer for use in holding and locking a sheet of filter material including a pair of brackets spaced apart in a position to secure a sheet of filter material, a pair of L-shaped openings in each bracket, extending from one edge of each bracket downward and then outward in opposite directions substantially parallel to the edge of the bracket, a U-shaped retaining rod extending between the brackets and having two legs each of which extend through one of the Lshaped openings in each bracket said legs being deflectable for insertion and removal from the L-shaped openings and sufficiently resilient to move apart into the bottom of the Lshaped openings to lock the retainer in place.
Claim 3
Dependent Claim
31 words
The filter retainer of claim 1 wherein the L-shaped openings in one bracket are sized to permit rotational movement of the U-shaped retaining rod for removal and replacement of the filter.
Claim 4
Dependent Claim
98 words
A filter retainer for use in holding and locking a sheet of filter material including a U-shaped rod having two deflectable legs, a first bracket having two slots therein which are sized to receive the legs of the U-shaped bracket and to permit rotational movement at the U-shaped bracket through a limited arc, a second bracket having two L-shaped slots, open at the top, to receive the legs of the U-shaped rod and lock the U-shaped rod into a filter retaining position, and means to mount the first and second bracket in a position to support a filter.
Claim 5
Dependent Claim
98 words
A filter retainer for use in holding and locking a sheet of filter material including a U-shaped rod having two deflectable legs, a first bracket having two slots therein which are sized to receive the legs of the U-shaped bracket and to permit rotational movement at the U-shaped bracket through a limited arc, a second bracket having two L-shaped slots, open at the top, to receive the legs of the U-shaped rod and lock the U-shaped rod into a filter retaining position, and means to mount the first and second bracket in a position to support a filter.
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |