Adjustable air filter

Details Adjustable air filter Adjustable air filter

1993-09-23

1996-05-14

Chiesa, Richard L.

Gas separation: apparatus

Electric field separation apparatus

And serially arranged nonelectrical separator

55486, 55496, 55511, 55528, 55DIG31, 96 58, 96 59, 96 75, 96 99, B03C 3017, B03C 302

Patent

active

RE0352365

ABSTRACT:
An adjustable air filter for use in heating, ventilating, cooling, and forced air systems. The air filter includes a media for filtering air and adapted to be cut with scissors, and a frame embracing the peripheral edges of the media. The frame includes a pair of male sections and a pair of female sections respectively telescopingly receiving the male sections. Also, the frame is adapted to be cut with scissors and is preferably formed of polyvinyl chloride. Each of the male sections includes a T-shaped projection and each of the female sections includes a complementary shaped T-shaped slot adapted to telescopingly receive the T-shaped projection for preventing inward separation of the sections from one another. In the preferred form the media is of the electrostatic type and includes at least one layer of polypropylene woven in an egg-crate pattern. Also, the layer preferably includes a pad of washable polyester material. At least one grid, having squares defining interstices, is formed of polypropylene and is heat staked into the layer of polypropylene for permanent attachment thereto. Self-tapping screws are provided to lock the sections of the frame together against telescoping separation thereof.

REFERENCES:
patent: 1122437 (1914-12-01), Sweeney
patent: 2175903 (1939-10-01), Lichtman
patent: 2802544 (1957-08-01), Lewis
patent: 3274759 (1966-09-01), Bell, Jr.
patent: 3592451 (1971-07-01), McDuffee
patent: 3675402 (1972-07-01), Weed
patent: 4460394 (1984-07-01), Wrightson
patent: 4902306 (1990-02-01), Burnett et al.
patent: 5011555 (1991-04-01), Sager
patent: 5037455 (1991-08-01), Scheineson et al.
patent: 5059218 (1991-10-01), Pick
patent: 5087276 (1992-02-01), Snyder
Table 6.8.18 Thermoplastics--Properties and Uses; pp. 6-173 through 6-175 of Marks' Standard Handbook for Mechanical Engineers, 9th Edition, 1987.

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