Patent US1362488A successfully refreshed from Google Patents.
Patent US4938588A successfully refreshed from Google Patents.
Patent US4795666A successfully refreshed from Google Patents.
US4795666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber reinforced structural member
Assignee: Kawasaki Motors Ltd
•
Filing: 1987-05-12
•
Granted: 1989-01-03
•
Expires: 2007-05-12
Abstract
Abstract A fiber reinforced structural member comprises a shell element formed of a fiber reinforced material such as, for example, a fiber reinforced plastic, and a core element having a large joining surface fixedly joined to the inner surface of the shell element, and comprising one or a plurality of primary core elements each formed of a fiber reinforced material such as, for example, a fiber reinforced plastic, in the form of a tube or a channel, and internally filled with a filling material such as, for example, foam polyurethane. Since the shell element and the core element are joined together over the large joining area, an external force applied to the fiber reinforced structural member is distributed over the large joining surface and hence the stress in the joining surface is reduced, so that the durability and reliability of the fiber reinforced structural member is enhanced.
Inventors
- 👤 Yukio Okada
- 👤 Akira Iwamura
- 👤 Shuji Akashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:00
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0003; B29D99/0007; B61; B61F; B61F5/00; B61F5/50; B61F5/52; B61F5/523; Y; Y02; Y02T; Y02T30/00; Y10; Y10S; Y10S52/00; Y10S52/07; Y10S52/08; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/234
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
86 words
A structural member, comprising: a shell element having a closed cross-section; a plurality of core elements disposed internally within said shell element, each of said core elements having a closed cross-section with at least one side surface thereof united to said shell element and at least one side surface thereof united to another one of said core elements whereby load and impact forces impressed upon said structural member can be distributed throughout said shell and core elements; and filling material disposed internally within said core elements.
Claim 2
Dependent Claim
86 words
A structural member, comprising: a shell element having a closed cross-section; a plurality of core elements disposed internally within said shell element, each of said core elements having a closed cross-section with at least one side surface thereof united to said shell element and at least one side surface thereof united to another one of said core elements whereby load and impact forces impressed upon said structural member can be distributed throughout said shell and core elements; and filling material disposed internally within said core elements.
Claim 3
Dependent Claim
18 words
A structural member as set forth in claim 1, wherein: said structural member comprises an elongated structural beam.
Claim 4
Dependent Claim
51 words
A structural member as set forth in claim 2, wherein said structural beam member comprises: bearing pads disposed upon opposite ends of said structural beam member; and a load bearing member located at a central portion of said structural beam member for supporting external loads applied to said structural beam member.
Claim 5
Dependent Claim
22 words
A structural member as set forth in claim 1, wherein: said shell and core elements are formed from a fiber reinforced material.
Claim 6
Dependent Claim
20 words
A structural member as set forth in claim 4, wherein: said fiber reinforced material is a fiber reinforced plastic (FRP).
Claim 7
Dependent Claim
31 words
A structural member as set forth in claim 1, wherein: said shell element has a substantially square-shaped configuration in cross-section while said core elements have a substantially rectangular configuration in cross-section.
Claim 8
Dependent Claim
20 words
A structural member as set forth in claim 6, wherein: two core elements are disposed internally within said shell element.
Claim 9
Dependent Claim
20 words
A structural member as set forth in claim 6, wherein: three core elements are disposed internally within said shell element.
Claim 10
Dependent Claim
16 words
A structural member as set forth in claim 15, wherein: said filling material comprises foam polyurethane.
Claim 11
Dependent Claim
16 words
A structural member as set forth in claim 1, wherein: said filling material comprises foam polyurethane.
Claim 12
Dependent Claim
25 words
A structural member as set forth in claim 1, wherein: said plurality of core elements comprise two core elements disposed in a single aligned row.
Claim 13
Dependent Claim
25 words
A structural member as set forth in claim 1, wherein: said plurality of core elements comprise three core elements disposed in a single aligned row.
Claim 14
Dependent Claim
38 words
A structural member as set forth in claim 1, wherein: said plurality of core elements comprises two core elements; and the volume of said two core elements is substantially equal to the interior volume of said shell element.
Claim 15
Dependent Claim
38 words
A structural member as set forth in claim 1, wherein: said plurality of core elements comprises three core elements; and the volume of said three core elements is substantially equal to the interior volume of said shell element.
Claim 16
Dependent Claim
85 words
A structural member, comprising: a shell element having a closed cross-section; a plurality of closed cross-section core elements, disposed internally within said shell element in a serial array, united to each other in said serial array and with at least end ones of said core elements of said serial array also being united to said shell element whereby load and impact forces impressed upon said structural member can be distributed throughout said shell and core elements; and filling material disposed internally within said core elements.
Claim 17
Dependent Claim
85 words
A structural member, comprising: a shell element having a closed cross-section; a plurality of closed cross-section core elements, disposed internally within said shell element in a serial array, united to each other in said serial array and with at least end ones of said core elements of said serial array also being united to said shell element whereby load and impact forces impressed upon said structural member can be distributed throughout said shell and core elements; and filling material disposed internally within said core elements.
Claim 18
Dependent Claim
22 words
A structural member as set forth in claim 15, wherein: said shell and core elements are fabricated from a fiber reinforced material.
Claim 19
Dependent Claim
20 words
A structural member as set forth in claim 16, wherein: said fiber reinforced material is a fiber reinforced plastic (FRP).
Claim 20
Dependent Claim
31 words
A structural member as set forth in claim 15, wherein: said shell element has a substantially square-shaped configuration in cross-section while said core elements have a substantially rectangular configuration in cross-section.
Claim 21
Dependent Claim
20 words
A structural member as set forth in claim 18, wherein: two core elements are disposed internally within said shell element.
Claim 22
Dependent Claim
20 words
A structural member as set forth in claim 18, wherein: three core elements are disposed internally within said shell element.
Claim 23
Dependent Claim
18 words
A structural member as set forth in claim 15, wherein: said structural member comprises an elongated structural beam.
Claim 24
Dependent Claim
51 words
A structural member as set forth in claim 21, wherein said structural beam member comprises: bearing pads disposed upon opposite ends of said structural beam member; and a load bearing member located at a central portion of said structural beam member for supporting external loads applied to said structural beam member.
Claim 25
Dependent Claim
41 words
A structural member as set forth in claim 15, wherein: said serial array is a one-by-two array with said core elements extending one core element thickness in a first direction and extending two core element thicknesses in a second orthogonal direction.
Claim 26
Dependent Claim
41 words
A structural member as set forth in claim 15, wherein: said serial array is a one-by-three array with said core elements extending one core element thickness in a first direction and extending three core element thicknesses in a second orthogonal direction.
Claim 27
Dependent Claim
41 words
A structural member as set forth in claim 15, wherein: said plurality of core elements comprises two core elements; and the volume of said serial array of said core elements is substantially equal to the interior volume of said shell elements.
Claim 28
Dependent Claim
41 words
A structural member as set forth in claim 15, wherein: said plurality of core elements comprises three core elements; and the volume of said serial array of said core elements is substantially equal to the interior volume of said shell element.
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) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |