US4020202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beam and strut girder
Assignee: MAN AG
•
Filing: 1974-07-08
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Granted: 1977-04-26
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Expires: 1994-07-08
Abstract
Abstract A beam and strut girder for use in vehicles and in other constructions which comprises a girder construction consisting of a fiber reinforced plastic material.
Inventors
- 👤 Holger Kreft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:15
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0003; B29C; B29C69/00; B29C69/001; B29C69/002; B29C69/003; B29C70/00; B29C70/68; B29C70/86; B29C70/865; B62; B62D; B62D29/00; E; E04; E04C; E04C3/00; E04C3/02; E04C3/28; B29K; B29K2105/00; B29K2105/04; B29K2307/00; B29K2307/02; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/2918; Y10T428/2922; Y10T428/2925; Y10T428/2929; Y10T428/2933; Y10T428/2936; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
89 words
A beam and strut girder for application in vehicles and civil engineering, which comprises a girder structure having a longitudinal centerline and consisting of reinforcing fibers made of carbon or boron embedded within a plastic matrix; said reinforcing fibers being embedded in the plastic matrix at an angle of 30° to 60° with said longitudinal centerline and said girder structure being formed of at least one shaped section comprising a fraction of a hollow shaped body, said body having windings of said reinforcing fibers positioned within said plastic matrix.
Claim 2
Dependent Claim
89 words
A beam and strut girder for application in vehicles and civil engineering, which comprises a girder structure having a longitudinal centerline and consisting of reinforcing fibers made of carbon or boron embedded within a plastic matrix; said reinforcing fibers being embedded in the plastic matrix at an angle of 30° to 60° with said longitudinal centerline and said girder structure being formed of at least one shaped section comprising a fraction of a hollow shaped body, said body having windings of said reinforcing fibers positioned within said plastic matrix.
Claim 3
Dependent Claim
18 words
The beam and strut girder of claim 1, wherein the plastic matrix is made of a synthetic resin.
Claim 4
Dependent Claim
30 words
The beam and strut girder of claim 1, wherein the reinforcing fibers are embedded in the plastic matrix at an angle of 45° with the longitudinal centerline of the girder.
Claim 5
Dependent Claim
29 words
The beam and strut girder of claim 1, wherein additional reinforcing fibers are embedded in the plastic matrix in a direction parallel with the longitudinal centerline of the girder.
Claim 6
Dependent Claim
45 words
The beam and strut girder of claim 1, wherein the girder structure comprises a plurality of shaped sections joined together, each of said sections comprising a fraction of a hollow shaped body, said body having windings of said reinforcing fibers positioned within said plastic matrix.
Claim 7
Dependent Claim
19 words
The beam and strut girder of claim 5, wherein said sections are joined to each other by adhesive cement.
Claim 8
Dependent Claim
16 words
The beam and strut girder of claim 5, wherein said sections are joined together by bolts.
Claim 9
Dependent Claim
25 words
The beam and strut girder of claim 5, wherein said windings are positioned at said angle about a longitudinal axis of said hollow shaped body.
Claim 10
Dependent Claim
29 words
The beam and strut girder of claim 1, wherein said plastic matrix is made of a synthetic resin selected from the group consisting of epoxy, polyimide and polyamide resins.
Claim 11
Dependent Claim
61 words
The beam and strut girder of claim 1, wherein said girder structure comprises a plurality of shaped sections joined together, each of said sections comprising a fraction of a hollow shaped body, said body having winding of said reinforcing fibers positioned within said plastic matrix, and a foamed plastic providing a filler core located between adjacent sections within said girder structure.
Claim 12
Dependent Claim
54 words
The beam and strut girder of claim 1, wherein said girder structure is formed from at least three shaped sections joined to each other, each shaped section comprising a fraction of a hollow shaped body having a rectangular cross-section, two of said shaped sections being identical angled sections and another being a plate section.
Claim 13
Dependent Claim
30 words
The beam and strut girder of claim 11, wherein said shaped sections include two plate sections and two identical angled sections arranged to form a girder having an I-shaped cross-section.
Claim 14
Dependent Claim
30 words
The beam and strut girder of claim 11, wherein said shaped sections include one plate section and two identical L-shaped sections arranged to form a girder having a T-shaped cross-section.
Claim 15
Dependent Claim
30 words
The beam and strut girder of claim 11, wherein said shaped sections include two plate sections and two identical L-shaped sections arranged to form a girder having a Z-shaped cross-section.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |