Patent US2145402A successfully refreshed from Google Patents.
Patent US3547818A successfully refreshed from Google Patents.
Patent US4459819A successfully refreshed from Google Patents.
Patent US4863771A successfully refreshed from Google Patents.
US4863771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow fiber reinforced structure and method of making same
Assignee: ThyssenKrupp Budd Co
•
Filing: 1987-12-21
•
Granted: 1989-09-05
•
Expires: 2007-12-21
Abstract
Abstract A hollow fiber reinforced structure having irregular cross-sections, curvatures, joints and twists is provided. A method of forming the structure includes placing fibrous material on the walls of an outer mold and placing a bladder internal to the fibrous material, which serves as an inner mold. When the mold is closed and the bladder expanded, resin is injected into the fibrous material. After curing, the solid reinforced structure is formed.
Inventors
- 👤 Richard B. Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:57
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/44; B29C70/443; B29C43/00; B29C43/02; B29C43/10; B29C43/12; B29L; B29L2022/00; B29L2024/00; B60; B60K; B60K15/00; B60K15/03; B60K2015/03328; B60K2015/03453; B60K2015/03467; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/23; B60R21/231; B60R2021/23123; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49947; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362; Y10T428/24; Y10T428/24628; Y10T428/24744
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A large molded structural part having a complex shape comprising: a hollow fiber reinforced plastic member including at least a first and a second section extending in different directions to each other and joined together at a joint, the first and second sections being asymmetrical in cross section and defined by two spaced apart surfaces, at least one surface being irregular shaped and different in configuration than the other surface, and the interior of the hollow member containing a bladder sufficiently resilient to have expanded to the inner faces of the two surfaces during molding of the member.
Claim 2
Dependent Claim
98 words
A large molded structural part having a complex shape comprising: a hollow fiber reinforced plastic member including at least a first and a second section extending in different directions to each other and joined together at a joint, the first and second sections being asymmetrical in cross section and defined by two spaced apart surfaces, at least one surface being irregular shaped and different in configuration than the other surface, and the interior of the hollow member containing a bladder sufficiently resilient to have expanded to the inner faces of the two surfaces during molding of the member.
Claim 3
Dependent Claim
27 words
The part of claim 1 wherein said irregular surface is constructed of a plurality of separate pieces of fibrous material which have been impregnated with a resin.
Claim 4
Dependent Claim
21 words
The part of claim2 wherein said plurality of pieces overlie each other along a lateral cross section of the irregular surface.
Claim 5
Dependent Claim
26 words
The part of claim1 wherein said bladder comprises two flat sheets seamed together along edges adjacent to the areas where said first and second surfaces meet.
Claim 6
Dependent Claim
15 words
The part of claim 1 in the shape of a door frame for a vehicle.
Claim 7
Dependent Claim
20 words
The part of claim 1 wherein said bladder extends continuously throughout the first and second sections and the joint therebetween.
Claim 8
Dependent Claim
11 words
The part of claim1 wherein the part is used in vehicle.
Claim 9
Dependent Claim
16 words
The part of claim 1 wherein said sections define an opening for supporting another structural member.
Claim 10
Dependent Claim
14 words
The part of claim 8 wherein said another structural member is a vehicle door.
References Cited (Backward Citations)
US25241A
Cited
USRE25241E
Cited
US3128322A
Cited
US3937781A
Cited
US3832109A
Cited
US3967996A
Cited
US4126659A
Cited
US4446092A
Cited
US4314964A
Cited
US4338070A
Cited
US4483731A
Cited
US4418031A
Cited
US4740346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |