EP0005556A2
Expired / Lapsed
EP
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Chair
Assignee: Alcatel Lucent NV
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Filing: 1979-05-22
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Granted: —
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Expires: 1999-05-22
Abstract
Abstract A chair has easily adjustable arm rests (3) to avoid user fatigue. The arm rests (3) are joined to supporting members (6) which are joined to the chair body (10). Each of the joints is a universal joint (8, 9) which, after operation of a lever (30), permits swiveling movements in all directions and an axial movement of the supporting member (6). The universal joint (8, 9) consists essentially of a ferrule (20) with a threaded stud (21) attached to the supporting member (6) or to the chair body (10). The threaded stud (21) supports several shells (22, 25, 27; 22, 41, 27, 42, 40) which are pressed together by the lever (30). One or more of these shells (25, 41, 42) are either connected with one of the arm rests (3) or fastened to one of the supporting members (6).
Inventors
- 👤 Arne Aaras
- 👤 Rikard Nakland
- 👤 Kjell Magnus Martinsen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 10:25
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/022; A47C1/03; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32549; Y10T403/32557; Y10T403/32565; Y10T403/32573
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
119 words
Chair having adjustable arm rests fastened to the chair via supporting members adjustably connected to the body of said chair, characterized in that each arm rest (3) is connected to at least one supporting member (6) by means of a universal joint (8) being rotatable in all directions, that the connection between each supporting member (6) and the body of the chair (10) comprises a second universal joint (9) which in addition to the rotational movements in all directions also allows an axial movement of the supporting member (6) to raise/lower the associated arm rest, and that the movement, in all directions, of each of the universal joints (8, 9) is lockable/releasable by operation of a single lever (30).
Claim 2
Dependent Claim
119 words
Chair having adjustable arm rests fastened to the chair via supporting members adjustably connected to the body of said chair, characterized in that each arm rest (3) is connected to at least one supporting member (6) by means of a universal joint (8) being rotatable in all directions, that the connection between each supporting member (6) and the body of the chair (10) comprises a second universal joint (9) which in addition to the rotational movements in all directions also allows an axial movement of the supporting member (6) to raise/lower the associated arm rest, and that the movement, in all directions, of each of the universal joints (8, 9) is lockable/releasable by operation of a single lever (30).
Claim 3
Dependent Claim
54 words
Chair according to claim 1, characterized in that at least one of the universal joints is a frictional joint which cannot be moved when exposed to usual working loads smaller than the actual frictional force of the joint, but which may be adjusted by a force exceeding the actual frictional force of the joint.
Claim 4
Dependent Claim
71 words
Chair according to claim 1 or 2, characterized in that at least one of the arm rests (3) can perform small, resilient movements, preferably in all directions, from its fixed position when exposed to small external load variations, as a resilient member allowing minor angular movements in all directions, such as a rubber block or a resilient spring member,is disposed between each arm rest (3) and its associated universal joint (8,9).
Claim 5
Dependent Claim
88 words
Chair according to any one of claims 1 to 3, characterized in that each universal joint (8, 9) comprises at least two sets of spherical shell sections (22, 27, 25) each comprising one or more shell sections, one set (22, 27) being fastened to the first (6), and the other set (25) being fastened to the second, of the members movable relative to each other, which sets are mutually interleaved, and an arrangement (21, 29) to press these sets of spherical shell sections firmly together for locking purposes.
Claim 6
Dependent Claim
72 words
Chair according to any one of claims 1 to 3, characterized in that at least one set of spherical shell sections is loosely, mechanically attached to its respective movable member in such a manner that the set is secured to said member when the lever (30) for locking the joint is tightened, while the spherical shell sections (22, 27) of the other set may be fixedly fastened to its associated movable member.
Claim 7
Dependent Claim
108 words
Chair according to any one of claims 1 to 3, characterized in that the one set of spherical shells (22, 27) is fastened to its respective member (6) by means of a threaded stud (21) which.passes through associated openings (24,26,28) in the two spherical shell sections (22,27,25) with a nut (29) on the top of the stud to press the sets together, and that the threaded stud (21) ends in a tubular ferrule (20) which is adapted to enclose one of the members (6) movable relative to each other, so that the universal joint may slide on the associated moving member (6) when the lever (30) is released.
Claim 8
Dependent Claim
121 words
Chair according to any one of claims 1 to 3, characterized in that the spherical shells of the first set of spherical shell sections are interleaved with the spherical shells of the second set of shells, that a common threaded stud (21) passes through openings in both sets of shell sections, and that the openings in all the elements of at least one of the spherical shell section sets are oversized to allow limited movements of one set relative to the other when a nut (29) on the top of said stud (21) is not tightened, and that the movements of the universal joints are limited by the shape and size of the oversize hole(s) through which the threaded stud passes.
Claim 9
Dependent Claim
58 words
Chair according to any one of claims 1 to 3, characterized in that the spherical shell sections have stepwise smaller spherical radii, so that each shell only touches its adjacent spherical shell along an annular, peripheral surface, and that the outer spherical shell section possibly has a centrally depressed section, which does not touch its-adjacent spherical shell section.
Claim 10
Dependent Claim
90 words
Chair according to any one of claims 1 to 3, characterized in that all the spherical shell sections belonging to the same set of shells are engaged with each other so that they all rotate as one body, and that the mutual engagement between the shells in one set of shells takes place either at the holes of said shells, e.g. as the stud 21 engages with said holes and prevents relative rotation, and/or at the peripheral brim of said shells, which e.g. may engage with the associated movable member.
References Cited (Backward Citations)
No citation records indexed.
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