US3786738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vent opening grill
Assignee: FAREX FAB
•
Filing: 1972-06-20
•
Granted: 1974-01-22
•
Expires: 1992-06-20
Abstract
Abstract A vent opening grill having a rectangular frame composed of two pairs of parallel frame members surrounding a rectangular vent opening and consisting of metallic or plastic sheet material. The inner sides of the frame members are provided with elongated parallel grooves which snugly receive rails having rows of parallel pins for louvers which extend across the vent opening and are turnable about the respective pairs of pins. The louvers between one pair of frame members are normal and offset relative to the louvers between the other pair of frame members. The frame members of one pair are U-shaped and have pairs of legs which overlap and are connected with adjacent end portions of the other pair of frame members. One pair of frame members may be integral with a flat plate which surrounds one end of the vent opening.
Inventors
- 👤 T Fahre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:01
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; E; E06; E06B; E06B7/00; E06B7/02; E06B7/08; E06B7/084
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
210 words
A grill, comprising a frame defining a substantially rectangular vent opening and including two first and second frame portions of sheet material flanking said opening, said first frame portions being disposed in spaced parallel planes and having inner sides facing each other and each provided with at least one elongated first groove having two open ends, and outer sides facing away from each other and each comprising a least one elongated bulge complementary to said first groove, said grooves and said bulges being parallel to each other, and each of the second frame portions comprising a base and two legs adjacent said base and eXtending perpendicularly thereto in mutual parallelism, at least said legs being provided with second grooves, said legs overlapping portions of said outer sides and portions of said bulges of said first frame members being received in said second grooves; a pair of elongated rails each received in one of said first grooves; a plurality of elongated parallel louvers extending between and transversely of said rails across said opening and each having two end portions; and coupling means connecting the end portions of said louvers to the respective rails so that each of said louvers is adjustable angularly about an axis extending between the respective end portions.
Claim 2
Dependent Claim
210 words
A grill, comprising a frame defining a substantially rectangular vent opening and including two first and second frame portions of sheet material flanking said opening, said first frame portions being disposed in spaced parallel planes and having inner sides facing each other and each provided with at least one elongated first groove having two open ends, and outer sides facing away from each other and each comprising a least one elongated bulge complementary to said first groove, said grooves and said bulges being parallel to each other, and each of the second frame portions comprising a base and two legs adjacent said base and eXtending perpendicularly thereto in mutual parallelism, at least said legs being provided with second grooves, said legs overlapping portions of said outer sides and portions of said bulges of said first frame members being received in said second grooves; a pair of elongated rails each received in one of said first grooves; a plurality of elongated parallel louvers extending between and transversely of said rails across said opening and each having two end portions; and coupling means connecting the end portions of said louvers to the respective rails so that each of said louvers is adjustable angularly about an axis extending between the respective end portions.
Claim 3
Dependent Claim
28 words
A grill as defined in claim 1, wherein said frame portions are elongated and said first grooves extend through substantially the full length of the respective frame portions.
Claim 4
Dependent Claim
29 words
A grill as defined in claim 1, wherein said portions of said outer sides are provided with eyelid-shaped apertures and said legs comprise tongues extending into the respective apertures.
Claim 5
Dependent Claim
55 words
A grill as defined in claim 1, wherein said second frame portions have inner sides facing each other and provided with a plurality of parallel grooves, each first frame portion also having a plurality of parallel grooves and each groove of said second frame portion being coplanar with one groove of said first frame portion.
Claim 6
Dependent Claim
145 words
A grill as defined in claim 1, wherein said second frame portions include additional inner sides facing each other and provided with additional grooves extending substantially the entire length of at least said base, said additional grooves having longitudinal axes defining a first plane and the longitudinal axes of said first grooves defining a second plane parallel to and spaced from said first plane; and further comprising an additional pair of elongated rails each received in one of said additional grooves; an additional plurality of elongated parallel louvers extending between and transversely of said additional rails across said opening and each having two end portions; and additional coupling means connecting the end portions of said additional louvers to the respective additional rails so that each of said additional louvers is adjustable angularly about an axis extending between the respective end portions of said additional louvers.
Claim 7
Dependent Claim
74 words
A grill as defined in claim 5, wherein said second and said additional grooves extend over both said legs and said base of said second frame portion, said inner sides of said first frame portions being provided with additional first grooves whose axes are located in said first plane and said outer sides of said first frame portions comprising additional bulges complementary to said additional first grooves and being received in said additional grooves.
Claim 8
Dependent Claim
43 words
A grill as defined in claim 1, wherein said frame further includes a substantially flat end frame portion surrounding said opening and rigid with said first frame portions, said planes being at least substantially normal to the plane of said flat frame portion.
Claim 9
Dependent Claim
36 words
A grill as defined in claim 7, wherein said first and end frame portions consist of a single piece of sheet material and said first frame portions extend from one side of said end frame portion.
Claim 10
Dependent Claim
33 words
A grill as defined in claim 1, wherein said coupling means are pins which are rigid with said rails and extend into sockets provided in the adjacent end portions of the respective louvers.
Claim 11
Dependent Claim
18 words
A grill as defined in claim 9, wherein said rails and said pins consist of synthetic plastic material.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |