Patent US3802440A successfully refreshed from Google Patents.
US4380443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber-reinforced drive shaft
Assignee: Felten and Guilleaume Carlswerk AG
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Filing: 1981-06-09
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Granted: 1983-04-19
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Expires: 2001-06-09
Abstract
Abstract A drive shaft, particularly for motor vehicles, has a tubular shaft part of a fiber reinforced synthetic plastic material, two end pieces each associated with respective one of the end portions of the shaft and having sleeve-shaped and ring-shaped sections, and a plurality of anchoring pins arranged on the end pieces on the region between the sleeve-shaped and the ring-shaped section at circumferentially spaced locations.
Inventors
- 👤 Helmut Federmann
- 👤 Joachim Bausch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:06
CPC Classifications
F; F16; F16C; F16C3/00; F16C3/02; F16C3/026; F16C3/023; F16C2326/00; F16C2326/01; F16C2326/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
182 words
A drive shaft, particularly for motor vehicles, comprising a tubular shaft part having an axis and two axially spaced end portions and being composed of a fiber-reinforced synthetic plastic material; two end pieces each associated with a respective one of said end portions of said shaft and having a sleeve-shaped section extending into and surrounded by a respective one of said end portions of said shaft part, and a ring-shaped section extending axially outwardly from said sleeve-shaped section and having an inner end face which forms a stop and a protective end abutment for a respective one of said end portions of said shaft part, said end pieces being constituted of metal; and means for connecting said end pieces with said shaft part, said connecting means including a plurality of anchoring members provided in each of said end pieces, said anchoring members being arranged on said sleeve-shaped section so that they extend substantially radially outwardly at a plurality of circumferentially spaced locations in the vicinity of a transition between said sleeve-shaped section and said ring-shaped section of each of said end pieces.
Claim 2
Dependent Claim
182 words
A drive shaft, particularly for motor vehicles, comprising a tubular shaft part having an axis and two axially spaced end portions and being composed of a fiber-reinforced synthetic plastic material; two end pieces each associated with a respective one of said end portions of said shaft and having a sleeve-shaped section extending into and surrounded by a respective one of said end portions of said shaft part, and a ring-shaped section extending axially outwardly from said sleeve-shaped section and having an inner end face which forms a stop and a protective end abutment for a respective one of said end portions of said shaft part, said end pieces being constituted of metal; and means for connecting said end pieces with said shaft part, said connecting means including a plurality of anchoring members provided in each of said end pieces, said anchoring members being arranged on said sleeve-shaped section so that they extend substantially radially outwardly at a plurality of circumferentially spaced locations in the vicinity of a transition between said sleeve-shaped section and said ring-shaped section of each of said end pieces.
Claim 3
Dependent Claim
67 words
A drive shaft as defined in claim 1, wherein said sleeve-shaped section of each of said end pieces has a predetermined inner and outer diameters, said ring-shaped section of each of said end pieces having an outer diameter which exceeds the outer diameter of said sleeve-shaped section and an inner diameter which is equal to the inner diameter of said sleeve-shaped section of the same end piece.
Claim 4
Dependent Claim
40 words
A drive shaft as defined in claim 1, wherein said end portions of said shaft part are composed of a synthetic plastic matrix with embedded fibers bonded with said inner end face of a respective one of said end pieces.
Claim 5
Dependent Claim
41 words
A drive shaft as defined in claim 1, wherein said end portions of said shaft part are composed of a synthetic plastic matrix with embedded fiber bundles bonded with said inner end face of a respective one of said end pieces.
Claim 6
Dependent Claim
54 words
A drive shaft as defined in claim 1, wherein said ring-shaped sections of said end pieces have a predetermined outer diameter, said shaft part has a central portion located between said end portions and having an outer diameter which is substantially equal to the outer diameter of said ring-shaped sections of said end pieces.
Claim 7
Dependent Claim
34 words
A drive shaft as defined in claim 1, wherein said anchoring members are uniformly distributed on said sleeve-shaped section of each of said end pieces, as considered in a circumferential direction of the latter.
Claim 8
Dependent Claim
48 words
A drive shaft as defined in claim 1, wherein each of said anchoring members is formed as an anchoring pin having an inner portion inserted into said sleeve-shaped section of a respective one of said end pieces and an outer portion extending substantially radially outwardly from the same.
Claim 9
Dependent Claim
37 words
A drive shaft as defined in claim 1, wherein each of said end pieces extending in a predetermined direction, said anchoring members being inclined to said direction of extension of a respective one of said end pieces.
Claim 10
Dependent Claim
49 words
A drive shaft as defined in claim 1, wherein each of said end pieces has an annular groove provided in the region of transistion between said sleeve-shaped section and said ring-shaped section, said anchoring members being introduced into said annular groove of a respective one of said end pieces.
Claim 11
Dependent Claim
37 words
A drive shaft as defined in claim 9, wherein each of said end pieces has a plurality of blind holes provided in a wall bounding said annular groove, said anchoring members being inserted into said blind holes.
Claim 12
Dependent Claim
37 words
A drive shaft as defined in claim 9, wherein each of said end pieces has a plurality of threaded openings provided in a wall bounding said annular groove, said anchoring members being screwed into said threaded openings.
Claim 13
Dependent Claim
36 words
A drive shaft as defined in claim 1, wherein each of said end pieces has an inner diameter of between 60 mm and 80 mm and is provided with at least 24 of said anchoring members.
Claim 14
Dependent Claim
22 words
A drive shaft as defined in claim 12, wherein each of said end pieces is provided with 32 of said anchoring members.
Claim 15
Dependent Claim
51 words
A drive shaft as defined in claim 1, wherein said sleeve-shaped section of each of said end pieces has an outer contour including a convex part radially increasing the wall thickness of said sleeve-shaped section, and an adjoining inclined part radially decreasing the wall thickness of said sleeve-shaped section to 0-value.
Claim 16
Dependent Claim
55 words
A drive shaft as defined in claim 14, wherein said ring-shaped section of each of said end pieces has a predetermined outer diameter, said convex part of said sleeve-shaped section of each of said end pieces having an outer diameter substantially corresponding to the outer diameter of said ring-shaped section of the same end pieces.
Claim 17
Dependent Claim
29 words
A drive shaft as defined in claim 14, wherein said sleeve-shaped section of each of said end pieces has an outer surface entirely provided with a plurality of projections.
Claim 18
Dependent Claim
36 words
A drive shaft as defined in claim 16, wherein at least a part of said ring-shaped section of each of said end pieces has an outer surface at least partially provided with a plurality of projections.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-18 | 1986-10-18 | 1987-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-18 | 1990-10-18 | 1991-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-18 | 1994-10-18 | 1995-04-19 | $7700.00 | Window Closed / Lapsed |