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US3823518A
Expired / Lapsed
US
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Reinforced fiberglass plastic roof for box cars
Assignee: Stanray Corp
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Filing: 1973-01-05
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Granted: 1974-07-16
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Expires: 1993-01-05
Abstract
Abstract A railway vehicle roof including a plurality of sections made from molded reinforced fiber glass plastic sheets. The molded plastic sheets include a pair of transversely extending and lengthwise spaced ribs, a pair of spaced X-shaped ribs disposed between the transversely extending ribs, and a plurality of ribs extending between the X-shaped ribs. Upstanding flanges are formed along the transverse edges of the panel. A seam cap fits over adjacent ones of the upstanding flanges.
Inventors
- 👤 J Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:15
CPC Classifications
B; B61; B61D; B61D17/00; B61D17/04; B61D17/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
151 words
In a railway box car having a pair of side plate structures extending longitudinally thereof, a roof structure secured to the side plates, said roof structure comprising a panel at each end made of steel and a central panel made of steel, a plurality of reinforced fiber glass plastic roof sections disposed between the respective end panels and said central panel, said plastic roof sections each including a pair of X-shaped ribs molded therein, said X-shaped ribs being separated by a plurality of transversely extending ribs, a transversely extending rib located on opposite sides of each of said X-shaped ribs, and shallow ribs along each of the transverse edges of said sections, a flange projecting upwardly from each of said transverse edges and being in abutting relationship with an upstanding flange on an adjacent panel, and a seam cap overlying said flanges and fastening said panels together along said transverse edges.
Claim 2
Dependent Claim
151 words
In a railway box car having a pair of side plate structures extending longitudinally thereof, a roof structure secured to the side plates, said roof structure comprising a panel at each end made of steel and a central panel made of steel, a plurality of reinforced fiber glass plastic roof sections disposed between the respective end panels and said central panel, said plastic roof sections each including a pair of X-shaped ribs molded therein, said X-shaped ribs being separated by a plurality of transversely extending ribs, a transversely extending rib located on opposite sides of each of said X-shaped ribs, and shallow ribs along each of the transverse edges of said sections, a flange projecting upwardly from each of said transverse edges and being in abutting relationship with an upstanding flange on an adjacent panel, and a seam cap overlying said flanges and fastening said panels together along said transverse edges.
Claim 3
Dependent Claim
19 words
The invention as defined in claim 1 wherein said seam cap includes a sealant for sealing said upstanding flanges.
Claim 4
Dependent Claim
24 words
The invention as defined in claim 1 wherein said plastic sections include a fiber glass content of about 30 to 35 percent by weight.
Claim 5
Dependent Claim
14 words
The invention as defined in claim 1 wherein said plastic is a polyester resin.
Claim 6
Dependent Claim
14 words
The invention as defined in claim 1 wherein said plastic is a translucent plastic.
Claim 7
Dependent Claim
15 words
The invention as defined in claim 1 wherein said plastic is a gray opaque plastic.
References Cited (Backward Citations)
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Cited
US1709603A
Cited
US1956302A
Cited
US2446323A
Cited
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Cited
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Cited
US3429083A
Cited
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 |