Patent US4378561A successfully refreshed from Google Patents.
US4378561A
Expired / Lapsed
US
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Parabolic reflector antenna
Assignee: Individual
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Filing: 1981-01-15
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Granted: 1983-03-29
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Expires: 2001-01-15
Abstract
Abstract A parabolic electromagnetic wave reflector is formed of glued together identical sectors of foam plastic, each with a parabolic curve formed by the upper side, and each with joint elements which serve also as stiffening ribs along their radial edges. A reflective surface is applied to the concave sides of the sectors. When the sectors are joined, they combine to form a parabolic dish.
Inventors
- 👤 Robert J. Hibbard
- 👤 Carl V. Seibert, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:54
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/141; H01Q15/142; F; F24; F24S; F24S23/00; F24S23/70; F24S23/71; F24S23/82; Y; Y02; Y02E; Y02E10/00; Y02E10/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A parabolic reflector comprised of a plurality of similar sectors of foam plastic, each of said sectors having a periphery and an apex and a concave surface formed along parabolic curves extending between said periphery and apex, joint means along radial edges of said sectors for joining the same together to form a dish-shape body, a foam plastic generally flat stiffening rib upstanding from and integral with the concave side of each sector and extending radially from the periphery to the apex thereof, and reflective surface means on the concave sides of said sectors providing for the joined-together sectors a common focal point of reflected wave energy, said ribs being along radial edges of said sectors.
Claim 2
Dependent Claim
116 words
A parabolic reflector comprised of a plurality of similar sectors of foam plastic, each of said sectors having a periphery and an apex and a concave surface formed along parabolic curves extending between said periphery and apex, joint means along radial edges of said sectors for joining the same together to form a dish-shape body, a foam plastic generally flat stiffening rib upstanding from and integral with the concave side of each sector and extending radially from the periphery to the apex thereof, and reflective surface means on the concave sides of said sectors providing for the joined-together sectors a common focal point of reflected wave energy, said ribs being along radial edges of said sectors.
Claim 3
Dependent Claim
42 words
A parabolic reflector as claimed in claim 1, the ribs on said sectors having sidewise-open grooves therein, each of said sectors having along the other radial edge thereof a tongue for engaging in the groove in the rib of an adjacent sector.
Claim 4
Dependent Claim
27 words
A parabolic reflector as claimed in claim 1, each of said sectors having a peripheral flange integral with the radially outward end of the stiffening rib thereon.
Claim 5
Dependent Claim
145 words
A parabolic reflector comprised of a plurality of similar sectors of foam plastic, each of said sectors having a periphery and an apex and a concave surface formed along parabolic curves extending between said periphery and apex, joint means along radial edges of said sectors for joining the same together to form a dish-shape body, a foam plastic generally flat stiffening rib upstanding from and integral with the concave side of each sector and extending radially from the periphery to the apex thereof, and reflective surface means on the concave sides of said sectors providing for the joined-together sectors a common focal point of reflected wave energy, the stiffening rib on each of said sectors having adjacent the apex thereof an upstanding end for joining with the upstanding rib ends of the other sectors to provide a unitary column at the center of the body.
Claim 6
Dependent Claim
145 words
A parabolic reflector comprised of a plurality of similar sectors of foam plastic, each of said sectors having a periphery and an apex and a concave surface formed along parabolic curves extending between said periphery and apex, joint means along radial edges of said sectors for joining the same together to form a dish-shape body, a foam plastic generally flat stiffening rib upstanding from and integral with the concave side of each sector and extending radially from the periphery to the apex thereof, and reflective surface means on the concave sides of said sectors providing for the joined-together sectors a common focal point of reflected wave energy, the stiffening rib on each of said sectors having adjacent the apex thereof an upstanding end for joining with the upstanding rib ends of the other sectors to provide a unitary column at the center of the body.
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) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |