US4559274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite components of sandwich construction
Assignee: Ford Motor Co
•
Filing: 1983-04-18
•
Granted: 1985-12-17
•
Expires: 2003-04-18
Abstract
Abstract A composite sandwich formed by enclosing a central resilient layer of a soft compressible material between two plate-shaped parts of foamable synthetic material and inserting the assembly into a cavity formed from two shells of prefabricated sheet metal. The resultant composite is subjected to a heat treatment for about 10 minutes at about 200° C. so that the foamable material expands to fill the cavity.
Inventors
- 👤 Herbert Kloppe
- 👤 Erwin Spiegel
- 👤 Hans Vogt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:07
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/1266; B32; B32B; B32B15/00; B32B15/04; B29C44/1285; B29C44/18; B32B15/046; B32B3/00; B32B3/02; B32B3/04; B32B3/26; B32B3/266; B32B5/00; B32B5/18; B62; B62D; B62D29/00; B62D29/001; B62D29/002; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2305/00; B32B2305/08; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12347; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
82 words
A method of producing composite components of sandwich construction, comprising the steps of assembling two shells, each in the form of a prefabricated metal sheet to define a cavity, and two plate-shaped parts of foamable synthetic material with a resilient central layer of a soft compressible material between them in the cavity, joining the two shells at their edges, and subjecting the resulting assembly to a heat treatment of a duration of approximately 10 minutes at a temperature of approximately 200° centigrade.
Claim 2
Independent Claim
82 words
A method of producing composite components of sandwich construction, comprising the steps of assembling two shells, each in the form of a prefabricated metal sheet to define a cavity, and two plate-shaped parts of foamable synthetic material with a resilient central layer of a soft compressible material between them in the cavity, joining the two shells at their edges, and subjecting the resulting assembly to a heat treatment of a duration of approximately 10 minutes at a temperature of approximately 200° centigrade.
Claim 3
Dependent Claim
17 words
A method as claimed in claim 1, wherein the foamable synthetic material is reinforced with mineral fibres.
Claim 4
Dependent Claim
23 words
A method as claimed in claim 1, wherein the two shells are also joined to each other at point other than their edges.
Claim 5
Dependent Claim
15 words
A method as claimed in claim 1, wherein the shells are joined by spot welding.
Claim 6
Dependent Claim
34 words
A method as claimed in claim 1, wherein said plate-shaped foamable part between said two shells of sheet metal has thickness varying locally in accordance with the cross-section of the cavity to be filled.
Claim 7
Dependent Claim
15 words
A method as claimed in claim 1, wherein said foamable part is formed by stamping.
Claim 8
Dependent Claim
15 words
A method as claimed in claim 1, wherein the foamable part is formed by moulding.
Claim 9
Dependent Claim
28 words
A method as claimed in claim 1, wherein the central layer is porous in order to make possible a foam migration towards the inside of said central layer.
Claim 10
Dependent Claim
28 words
A method as claimed in claim 1, wherein the central layer is perforated in order to make possible a foam migration towards the inside of said central layer.
Claim 11
Dependent Claim
26 words
A method as claimed in claim 1, wherein the edges of said two shells are provided with flanges by means of which the shells are joined.
Claim 12
Dependent Claim
20 words
A method as claimed in claim 1, wherein said plate-shaped part consists of pre-reacted polyurethane foam reinforced with mineral fibres.
Claim 13
Dependent Claim
23 words
A method as claimed in claim 1, wherein said shells have major faces which, when seen from outside the finished component, are concave.
Claim 14
Dependent Claim
14 words
A composite component of sandwich construction, produced according to the method of claim 1.
Claim 15
Dependent Claim
39 words
A composite component as claimed in claim 13, wherein said shells are curved and are joined to each other at points other than their edges, which points are placed so as to resist forces tending to compress the sandwich.
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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) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |