US3690103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural element construction and method of manufacturing
Assignee: Bolkow GmbH
•
Filing: 1967-11-15
•
Granted: 1972-09-12
•
Expires: 1987-11-15
Abstract
Abstract A structural part for use as a wall of a device subject to high temperatures, such as rocket combustion chamber, heat shield, nose cone of a missile etc., includes individual tubular form elements having either an opened or a closed cross section which are fitted together to form a wall and which are connected mechanically strong and pressure proof by a layer of material which is electroformed on either one or both sides thereof. Various structural configurations are possible and in some instances the resultant structure is reinforced by a reinforcing member such as a steel strip. In the method of the invention, structural parts which are adapted to be liquid cooled are formed of small tubular elements which are arranged together and thereafter the cracks or joints between the elements are filled with a filling material which has an electrically conductive surface and subsequently a mechanically strong and pressure proof layer is electroformed over the wall formed by the tubular elements and the filling material. In some instances, the filling materials are fused out to leave the interiors void.
Inventors
- 👤 Carl-Helmut Dederra
- 👤 Karl Butter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:43
CPC Classifications
F; F42; F42B; F42B15/00; F42B15/34; F02; F02K; F02K9/00; F02K9/42; F02K9/60; F02K9/62; F02K9/64; F02K9/97; F02K9/972; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49346
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
A rocket engine combustion chamber comprising a composite wall forming the interior of said combustion chamber with an inner layer formed of a plurality of closed longitudinally extending tubular elements defining cooling flow channels, a filler between said tubular elements of a material having an electrically conductive surface, and a rigid layer of electroformed material over the exterior of said tubular elements and said filler and bonding said tubular elements together.
Claim 2
Dependent Claim
71 words
A rocket engine combustion chamber comprising a composite wall forming the interior of said combustion chamber with an inner layer formed of a plurality of closed longitudinally extending tubular elements defining cooling flow channels, a filler between said tubular elements of a material having an electrically conductive surface, and a rigid layer of electroformed material over the exterior of said tubular elements and said filler and bonding said tubular elements together.
Claim 3
Dependent Claim
19 words
A rocket engine combustion chamber, according to claim 1, including a structural steel layer applied over the electroformed layer.
Claim 4
Dependent Claim
75 words
A structural part particularly for high temperature use in devices such as rocket combustion chambers, heat shields, missile nose cones and the like, comprising a plurality of tubular elements arranged in side-by-side relationship, and an electroformed layer applied at least one side of said tubular elements and mechanically interconnecting said elements, said tubular elements being of substantially trapezoidal cross section arranged with alternate ones inverted so that they fit together substantially without any joint therebetween.
Claim 5
Dependent Claim
75 words
A structural part particularly for high temperature use in devices such as rocket combustion chambers, heat shields, missile nose cones and the like, comprising a plurality of tubular elements arranged in side-by-side relationship, and an electroformed layer applied at least one side of said tubular elements and mechanically interconnecting said elements, said tubular elements being of substantially trapezoidal cross section arranged with alternate ones inverted so that they fit together substantially without any joint therebetween.
Claim 6
Dependent Claim
18 words
A structural part, according to claim 3, including a electroformed layer on each side of said tubular elements.
Claim 7
Dependent Claim
102 words
A structural part particularly for high temperature use in devices such as rocket combustion chambers, heat shields, missile nose cones and the like, comprising a plurality of tubular elements arranged in side-by-side relationship, and an electroformed layer applied on at least one side of said tubular elements and mechanically interconnecting said elements, said tubular elements being of substantially I-shaped configuration arranged with their widened flange ends substantially abutting, and including a thermoplastic layer applied on each side of said tubular elements and closing off the spaces between the widened flange ends of said tubular elements to form two channels between each element.
Claim 8
Dependent Claim
102 words
A structural part particularly for high temperature use in devices such as rocket combustion chambers, heat shields, missile nose cones and the like, comprising a plurality of tubular elements arranged in side-by-side relationship, and an electroformed layer applied on at least one side of said tubular elements and mechanically interconnecting said elements, said tubular elements being of substantially I-shaped configuration arranged with their widened flange ends substantially abutting, and including a thermoplastic layer applied on each side of said tubular elements and closing off the spaces between the widened flange ends of said tubular elements to form two channels between each element.
References Cited (Backward Citations)
GB459924A
Cited
US2958183A
Cited
US3190070A
Cited
US2844939A
Cited
GB843923A
Cited
US3022230A
Cited
US3349464A
Cited
US3254487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |