Patent US5944441A successfully refreshed from Google Patents.
US5944441A
Expired / Lapsed
US
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Connection between rods or tubes made of fibre composite materials
Assignee: Deutsches Zentrum für Luft- und Raumfahrt eV
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Filing: 1997-03-27
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Granted: 1999-08-31
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Expires: 2017-03-27
Abstract
Abstract In a connection between round composite fiber rods or pipes positioned at an angle to one another there are provided angular connecting elements of which the angle corresponds to the angle between the rods to be connected, fiber helical windings in the region of the vertices of the angular connecting elements, respective arms of the connecting elements being arranged to be inserted in the rod or pipe ends. The angular connecting elements are fastened positively on a rod and/or rest frictionally in the rod ends. The fiber helical windings wrap around the angular connecting elements in their angled portions and connect them to one another. Fillers and/or adhesives fill the cavities which are formed at the rod or pipe ends.
Inventors
- 👤 Rainer Schutze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:29
CPC Classifications
F; F16; F16B; F16B7/00; B; B29; B29C; B29C65/00; B29C65/48; B29C65/52; B29C65/54; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/116; B29C66/1162; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5223; B29C66/5224; B29C66/5229; B29C66/52295; B29C66/52298; B29C66/526; B29C66/5264; B29C66/5265; B29C66/63; B29C66/636; B29C66/70; B29C66/72; B29C66/721; B29C66/7214; B29C66/72141; F16B11/00; F16B11/006; F16B11/008; B29C65/542; B29C66/5225; B29C66/7212; F16B2200/00; F16B2200/67; Y; Y10; Y10T; Y10T403/00; Y10T403/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
A connection arrangement comprising at least two round composite fiber rods to be connected and positioned at an angle to one another, angular connecting elements with an angled portion having an angle corresponding to the angle between said rods to be connected, fiber helical windings proximate the angled portion of said angular connecting elements, the rods having ends with cavities being formed at said rod ends, wherein fillers are provided for filling said cavities, respective arms of said angular connecting elements being inserted in said ends, wherein said angular connecting elements are supported in said rod ends by frictional contact and wherein said fiber helical windings are wrapped around and interconnect said angular connecting elements proximate said angled portions.
Claim 2
Dependent Claim
119 words
A connection arrangement comprising at least two round composite fiber rods to be connected and positioned at an angle to one another, angular connecting elements with an angled portion having an angle corresponding to the angle between said rods to be connected, fiber helical windings proximate the angled portion of said angular connecting elements, the rods having ends with cavities being formed at said rod ends, wherein fillers are provided for filling said cavities, respective arms of said angular connecting elements being inserted in said ends, wherein said angular connecting elements are supported in said rod ends by frictional contact and wherein said fiber helical windings are wrapped around and interconnect said angular connecting elements proximate said angled portions.
Claim 3
Dependent Claim
24 words
The connection arrangement according to claim 1, wherein said angular connecting elements are pre-assembled as a fitting to be inserted into said rod ends.
Claim 4
Dependent Claim
62 words
The connection arrangement according to claim 1, said angular connecting elements being attachable to a continuous rod, wherein external arms of said angular connecting elements project beyond said rod ends, said external arms being constructed and arranged to lie parallel to said continuous rod, said external arms being attached to said continuous rod by a helical winding embedded in a resin matrix.
Claim 5
Dependent Claim
45 words
The connection arrangement according to claim 3, wherein said angled portion of said connecting elements connecting said at least two rods being spaced from a wall of said continuous rod, said connecting elements having said external arms attached to a surface of said continuous rod.
Claim 6
Dependent Claim
134 words
A connection arrangement comprising at least one rod attached to a continuous rod, at least two connecting elements, each said connecting element having an internal arm which is inserted in an end of said at least one rod, and an external arm which extends beyond the end of said at least one rod, each said internal arm being connected to its corresponding external arm by an angled portion, said connecting elements further comprising fiber helical windings which are wrapped around and interconnect the connecting elements proximate the angled portions, said internal arms being supported in the end of said at least one rod by frictional contact, and said external arms being constructed and arranged to lie parallel to said continuous rod, said external arms being attached to said continuous rod by a helical winding.
Claim 7
Dependent Claim
134 words
A connection arrangement comprising at least one rod attached to a continuous rod, at least two connecting elements, each said connecting element having an internal arm which is inserted in an end of said at least one rod, and an external arm which extends beyond the end of said at least one rod, each said internal arm being connected to its corresponding external arm by an angled portion, said connecting elements further comprising fiber helical windings which are wrapped around and interconnect the connecting elements proximate the angled portions, said internal arms being supported in the end of said at least one rod by frictional contact, and said external arms being constructed and arranged to lie parallel to said continuous rod, said external arms being attached to said continuous rod by a helical winding.
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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) | 2002-08-30 | 2003-03-01 | 2003-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-30 | 2007-03-01 | 2007-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-30 | 2011-03-01 | 2011-08-31 | $7700.00 | Window Closed / Lapsed |