Filtering apparatus for a forced air duct grill
OwnerJoseph Hodgeinventor
Life of this patent
Estimating the term…
Abstract
A filter apparatus has a rigid housing surrounding a piece of preferably self charging electrostatic filter material and having a preferably magnetic attachment device for mounting the filter apparatus directly in front of a grill at an end of a cold air return or supply of a forced air system, for a heating and/or air conditioning system. The filter and housing are generally sized so that the frame does not cover any of the openings on the grill over which it is designed to be placed. Decorative openwork is positioned in the front of the filter material to provide an aesthetically pleasing covering of what is considered less than attractive filter material.
Claims16
A filter apparatus for filtering airflow directly in front of a grill at a room duct end of a forced air system, said filter apparatus comprising:
- a grill at a room duct end of a forced air system having supply and return ducts,
- a filter material large enough to entirely cover all openings in said grill and positioned within and supported by a rigid housing frame,
- a removable flexible support means to support said filter material parallel to said grill,
- said housing frame having sidewalls with channels completely extending around a periphery of said filter material and said removable flexible support means such that essentially all of the airflow through said duct end is directed through said filter material, a plate having decorative openwork positioned within said channels and in front of said filter material, and
- a removable attachment means operably positioned within said housing frame for mounting the filter apparatus in front of and over said grill.
A filter apparatus for placement over an opening at a room duct end of a forced air system, said filter apparatus comprising:
- a grill at a room duct end of a forced air system having supply and return ducts,
- a housing having sidewalls with channels,
- a flexible frame containing and supporting a removable filter, said frame removably positioned within said channels,
- a plate having decorative openwork positioned within said channels and in front of said filter, and
- a removable attachment means on a back of said housing and within said housing for mounting the filter apparatus in front of and over the opening.
Dependencies are inferred from the claim text.