Patent US4411114A successfully refreshed from Google Patents.
US4411114A
Expired / Lapsed
US
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Compression-tension strut
Assignee: MAN AG
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Filing: 1980-12-29
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Granted: 1983-10-25
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Expires: 2000-12-29
Abstract
Abstract Strut of a tubular wrapping of reinforcing fibers in a synthetic resin on a core, with two rounded tension end caps, the wrapping terminating on the rounded portions thereof, and with respectively one compression cap on an outer peg of each tension end cap and around the rounded section of the wrapping, in which strut the wrapping has longitudinal fibers extended over the rounded portions about pins affixed thereat and oriented obliquely toward the outside, and the core is a fiber-reinforced synthetic-resin pipe respectively attached on an inner peg of the tension peg for the concomitant absorption of the longitudinal compression or the longitudinal compression and longitudinal tension.
Inventors
- 👤 Horst Wurtinger
- 👤 Jochen Glissmann
- 👤 Herbert Heissler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:33
CPC Classifications
F; F16; F16C; F16C7/00; F16C7/02; F16C7/026; Y; Y10; Y10T; Y10T403/00; Y10T403/47; Y10T403/472
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
A strut for longitudinal tension and longitudinal compression comprising a tubular wrapping from reinforcing fibers in a synthetic resin on a core, with respectively one rounded cap provided at each end and exhibiting a central outer peg, the wrapping terminating on the rounded portion of this cap, the latter serving as a tension cap, and with respectively one compression cap attached to the outer peg and surrounding the rounded section of the wrapping, the wrapping of the strut exhibits longitudinal fibers extended over the two rounded portions around pins fixedly provided on the rounded portions and oriented obliquely toward the outside; and the core being a pipe of a fiber-reinforced synthetic resin and respectively affixed to an inner peg of the tension cap, for the concomitant absorption of the longitudinal compression or of the longitudinal compression and longitudinal tension.
Claim 2
Dependent Claim
139 words
A strut for longitudinal tension and longitudinal compression comprising a tubular wrapping from reinforcing fibers in a synthetic resin on a core, with respectively one rounded cap provided at each end and exhibiting a central outer peg, the wrapping terminating on the rounded portion of this cap, the latter serving as a tension cap, and with respectively one compression cap attached to the outer peg and surrounding the rounded section of the wrapping, the wrapping of the strut exhibits longitudinal fibers extended over the two rounded portions around pins fixedly provided on the rounded portions and oriented obliquely toward the outside; and the core being a pipe of a fiber-reinforced synthetic resin and respectively affixed to an inner peg of the tension cap, for the concomitant absorption of the longitudinal compression or of the longitudinal compression and longitudinal tension.
Claim 3
Dependent Claim
26 words
A strut according to claim 1, wherein the angle (α) between the oblique pin and the longitudinal direction of the strut is 45°-15°, especially about 30°.
Claim 4
Dependent Claim
25 words
A strut according to claim 1 or 2, wherein the oblique pins are arranged on the rounded portion in the form of a single crown.
Claim 5
Dependent Claim
41 words
A strut according to claim 1, wherein the oblique pins are supported with respect to the longitudinal tension of the longitudinal fibers by peripheral fibers wrapped around the longitudinal fibers on the rounded portion axially on the inside beside the pins.
Claim 6
Dependent Claim
27 words
The strut according to claims 1 or 4, wherein a shoulder located at the beginning of the inner peg is the axial abutment for the core pipe.
Claim 7
Dependent Claim
16 words
The strut according to claim 1, wherein the core pipe is cemented to the inner peg.
Claim 8
Dependent Claim
38 words
The strut according to claim 1, wherein the space between the rounded portion of the wrapping and the pins, on the one hand, and the compression cap, on the other hand, is filled with a hardened sealing compound.
Claim 9
Dependent Claim
13 words
The strut according to claim 1, wherein the core pipe has longitudinal fibers.
Claim 10
Dependent Claim
38 words
The strut according to claims 1 or 4, wherein the wrapping exhibits peripheral fibers from the oblique pins of one tension cap to those of the other tension cap, these peripheral fibers being wrapped around the longitudinal fibers.
Claim 11
Dependent Claim
20 words
The strut according to claim 8, the core pipe has peripheral fibers wrapped around the longitudinal fibers of this pipe.
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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) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |