EP0331490A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Shaft-locking device
Assignee: NHK Spring Co Ltd
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Filing: 1989-03-02
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Granted: —
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Expires: 2009-03-02
Abstract
Abstract A rotation device to permit, and lock rotation of a first part relative to a second part, said device comprising: a first shaft (3) to be connected to the first part (1) and having a spring engaging portion (3a) second shafts (4, 5), both to be connected to the second part (2) and being located either side of said portion (3a) of said first shaft (3) a coil spring (6) wound closely around said second shafts (4, 5) and around said portion (3a), so as to restrain relative rotation therebetween.
Inventors
- 👤 Yoshiharu Komagane Kojo Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 22:58
CPC Classifications
F; F16; F16M; F16M11/00; F16M11/02; F16M11/04; E; E05; E05D; E05D11/00; E05D11/08; E05D11/082; E05D11/084; F16B; F16B12/00; F16B12/10; F16B12/28; F16B12/32; F16C; F16C11/00; F16C11/04; F16C11/10; F16C11/103; F16D; F16D13/00; F16D13/08; F16D49/00; F16D49/02; F16D7/00; F16D7/02; F16D7/022; E05Y; E05Y2900/00; E05Y2900/20; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20636; Y10T74/2066
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
A rotation device to permit, and lock rotation of a first part relative to a second part, said device comprising: a first shaft (3) to be connected to the first part (1) and having a spring engaging portion (3a) second shafts (4, 5), both to be connected to the second part (2) and being located either side of said portion (3a) of said first shaft (3) a coil spring (6) wound closely around said second shafts (4, 5) and around said portion (3a), so as to restrain relative rotation therebetween.
Claim 2
Dependent Claim
90 words
A rotation device to permit, and lock rotation of a first part relative to a second part, said device comprising: a first shaft (3) to be connected to the first part (1) and having a spring engaging portion (3a) second shafts (4, 5), both to be connected to the second part (2) and being located either side of said portion (3a) of said first shaft (3) a coil spring (6) wound closely around said second shafts (4, 5) and around said portion (3a), so as to restrain relative rotation therebetween.
Claim 3
Dependent Claim
76 words
A rotation device according to claim 1 wherein: said second shafts (4, 5) are hollow, said first shaft has side portions (3b, 3c) either side of said portion (3a), said side portions (3b, 3c) having smaller diameters than said portion (3a) and being inserted into said second shafts so as to rotatably support said first shaft, and said second shafts (4, 5) and said portion (3a) of said first shaft (3) have the same external diameter.
Claim 4
Dependent Claim
35 words
A rotation device according to claim 1 or 2 wherein there are more turns of said coil spring (6) wound around said portion (3a) of said first shaft than around said second shafts (4, 5).
Claim 5
Dependent Claim
36 words
A rotation device according to claim 1 or 2 wherein there are more turns of said coil spring (6) wound around said second shafts (4, 5) than around said portion (3a) of said first shaft (3).
Claim 6
Dependent Claim
32 words
A rotation device according to any preceding claim wherein at least one end portion (6a) of said coil spring (b) is separated from the outer surface of respective second shafts (4, 5).
Claim 7
Dependent Claim
119 words
A rotation device to permit, and lock, rotation of a first part relative to a second part, said device comprising: a first shaft (13) to be connected to said first part, at least one second shaft (14) to be connected to said second part, a coil spring (6) closely wound around said first shaft (13) and said at least one second shaft (14) so as to restrain relative movement therebetween, and wherein at least one end portion (6a) of said coil spring (6) is separated from the outer surface of an appropriate one of said first and second shafts (13, 14) whereby the remainder of said coil spring (6) may more uniformly grip the outer surface of said shaft.
Claim 8
Dependent Claim
119 words
A rotation device to permit, and lock, rotation of a first part relative to a second part, said device comprising: a first shaft (13) to be connected to said first part, at least one second shaft (14) to be connected to said second part, a coil spring (6) closely wound around said first shaft (13) and said at least one second shaft (14) so as to restrain relative movement therebetween, and wherein at least one end portion (6a) of said coil spring (6) is separated from the outer surface of an appropriate one of said first and second shafts (13, 14) whereby the remainder of said coil spring (6) may more uniformly grip the outer surface of said shaft.
Claim 9
Dependent Claim
35 words
A rotation device according to claim 5 or 6 wherein said at least one end portion (6a) of said spring 6) extends at a tangent to the outer surface of said one of said shafts.
Claim 10
Dependent Claim
33 words
A rotation device according to claim 5 or 6 wherein said at least one end portion (6a) of said spring (6) is wound with a larger diameter than the remainder of said spring.
Claim 11
Dependent Claim
57 words
A rotation device according to claim 5 or 6 wherein at least one of said second shafts (4, 5) is stepped, having portions of small and large diameter, said portions of small diameter being remote from said first shaft (3) and the end portions (6a) of said coil spring being positioned around said portions of small diameter.
Claim 12
Independent Claim
30 words
A device according to any of claims 5 to 9 wherein grease is provided between said end portions (6a) of said coil spring (6) and said fixed shafts (4, 5).
References Cited (Backward Citations)
No citation records indexed.
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