Patent EP0441267A1 successfully refreshed from Google Patents.
EP0441267A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A support column
Assignee: Stabilus GmbH
•
Filing: 1991-02-01
•
Granted: —
•
Expires: 2011-02-01
Abstract
Abstract A chair column comprises a stand tube (3). A support bush is inserted into the upper end portion (3a) of the stand tube. A gas spring cylinder (2) extends axially through the receiver bush (5). The piston rod (21) is directed downward and is connected with a bottom (20) of the stand tube. The gas spring cylinder is guided through two axially spaced bearing bushes (6). The bearing bushes are radially supported by the receiver bush through a radially prestressed transmission ring (7) or a plurality of circumferentially distributed buffers. The radial prestress is transmitted to the contact face between the bearing bushes and the gas spring cylinder.
Inventors
- 👤 Hans-Josef Dipl.-Ing. Hosan
- 👤 Axel Dipl.-Ing. Knopp (Fh)
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 21:33
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/20; A47C3/30
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
174 words
A support column comprising a stand tube (3) having an axis, a bottom part (20) and an upper end portion (3a), a receiver bush (5) inserted into said upper end portion (3a), a telescopic positioning device (1) having a lower terminal portion (21) connected to said bottom part (20) of said stand tube (3) and a cylindrical member (2) extending through said receiver bush (5), said cylindrical member (2) having an outer cylindrical surface (2a) guided within said receiver bush (5) in substantially axial direction with respect to said stand tube (3), said outer cylindrical surface (2a) being in sliding engagement with at least one bearing bush (6), said bearing bush (6) being radially supported by said receiver bush (5), characterized by said bearing bush (6) being radially supported by said receiver bush (5) through radially elastic transmission means (7), said radially elastic transmission means (7) being radially prestressed, said at least one bearing bush (6) being radially prestressed against said outer cylindrical surface (2a) by the radial prestress of said transmission means (7).
Claim 2
Dependent Claim
25 words
A support column as set forth in claim 1, said bearing bush (6) being completely transversed by a substantially axially and radially extending slot (13).
Claim 3
Dependent Claim
24 words
A support column as set forth in claim 1 or 2, said radially elastic transmission means (7) comprising a radially elastic transmission ring (7).
Claim 4
Dependent Claim
22 words
A support column as set forth in claim 3, said radially elastic transmission ring (7) being coherent with said bearing bush (6).
Claim 5
Dependent Claim
25 words
A support column as set forth in claim 4, said radially elastic transmission ring (7) being coherent with said bearing bush (6) by two-layer-injection moulding.
Claim 6
Dependent Claim
40 words
A support column as set forth in one of claims 3 to 5, said radially elastic transmission ring (7) being at least partially received by a corresponding annular recess provided at a radially inner surface of said receiver bush (5).
Claim 7
Dependent Claim
38 words
A support column as set forth in one of claims 3 to 6, said radially elastic transmission ring (7) having a convex radially outer surface supported by a respective radially inner concave surface of said receiver bush (5).
Claim 8
Dependent Claim
28 words
A support column as set forth in claim 1 or 2, said radially elastic transmission means comprising a plurality of elastic buffer members (10) distributed around the axis.
Claim 9
Dependent Claim
27 words
A support column as set forth in claim 8, said buffer members (10) being at least partially received by respective cavities (11) within said receiver bush (9).
Claim 10
Dependent Claim
22 words
A support column as set forth in claim 8 or 9, said buffer members (10) being adherent to said receiver bush (9).
Claim 11
Dependent Claim
27 words
A support column as set forth in one of claims 1 to 10, said receiver bush (5,9) being subdivided into a plurality of receiver bush segments (5a,9a).
Claim 12
Dependent Claim
23 words
A support column as set forth in claim 11, said receiver bush segments (5a,9a) being connected to each other by segment connection means.
Claim 13
Dependent Claim
19 words
A support column as set forth in claim 12, said segment connection means being press button type connection means.
Claim 14
Dependent Claim
31 words
A support column as set forth in one of claims 1 to 13, said receiver bush (5,9) being provided with a plurality of recesses (12) in a radially outer surface thereof.
Claim 15
Dependent Claim
42 words
A support column as set forth in one of claims 1 to 14, said elastic transmission means (7) being made of an elastomeric material substantially softer in radial direction than the material of said receiver bush (5) and said bearing bush (6).
Claim 16
Dependent Claim
29 words
A support column as set forth in claim 15, said radially elastic transmission means (7) being made of one of a rubber elastic material and a foam plastic material.
Claim 17
Dependent Claim
24 words
A support column as set forth in one of claims 1 to 16, said receiver bush (5) being made of a synthetic plastic material.
Claim 18
Dependent Claim
24 words
A support column as set forth in one of claims 1 to 17, said bearing bush (6) being made of a synthetic plastic material.
Claim 19
Dependent Claim
21 words
A support column as set forth in claim 18, said bearing bush (6) being made of a graphite containing plastic material.
Claim 20
Dependent Claim
30 words
A support column as set forth in one of claims 1 to 17, said bearing bush (6) being made of a metal sheet material coated with a bearing surface layer.
Claim 21
Dependent Claim
24 words
A support column as set forth in one of claims 1 to 20, a plurality of bearing bushes (6) being provided along said axis.
Claim 22
Dependent Claim
20 words
A support column as set forth in claim 21, two bearing bushes (6) being provided axially one behind the other.
Claim 23
Dependent Claim
28 words
A support column as set forth in claim 21 or 22, each of said bearing bushes (6) being combined with separate radially elastic transmission means (7) allocated thereto.
Claim 24
Dependent Claim
40 words
A support column as set forth in one of claims 1 to 23, said lower terminal portion (21) of said telescopic positioning device (1) having a radial play with respect to said bottom part (20) of said stand tube (3).
Claim 25
Dependent Claim
61 words
A support column as set forth in one of claims 1 to 24, said telescopic positioning device (1) being a cylinder-piston rod device having at least one cylinder member (2) and a piston rod (21), said piston rod (21) being connected to said bottom part (20) of said stand tube (3), said cylinder member (2) providing said outer cylindrical surface (2a).
Claim 26
Dependent Claim
48 words
A support column as set forth in one of claims 1 to 25, said stand tube (3) being adapted for being connected with a foot structure, said cylindrical member (2) being adapted for being connected with a load member, such as a seat plate or a table plate.
Claim 27
Independent Claim
298 words
A method for assembling a support column, said support column comprising a stand tube (3) having an axis, a bottom part (20) and an upper end portion (3a), a receiver bush (5) inserted into said upper end portion (3a) a telescopic positioning device (1) having a lower terminal portion (21) connected to said bottom part (20) of said stand tube (3) and a cylindrical member (2) extending through said receiver bush (5), said cylindrical member (2) having an outer cylindrical surface (2a) guided within said receiver bush (5) in substantially axial direction with respect to said stand tube (3), said outer cylindrical surface (2a) being in sliding engagement with at least one bearing bush (6), said bearing bush (6) being radially supported by said receiver bush (5) through radially elastic transmission means (7), said radially elastic transmission means (7) being radially prestressed, said at least one bearing bush (6) being radially prestressed against said outer cylindrical surface (2a) by the radial prestress of said transmission means (7), said method comprising providing a preassembled guide unit (5,6,7) consisting of said receiver bush (5), said radially elastic transmission means (7) and said at least one bearing bush (6), inserting said preassembled guide unit (5,6,7) into said upper end portion (3a) of said stand tube (3) and inserting thereafter said telescopic positioning device (1) into said stand tube (3) through said preassembled guide unit (5,6,7), said at least one bearing bush (6) having an internal diameter equal to or smaller than the outer diameter of said outer cylindrical surface (2a) before inserting said telescopic positioning device (1) into said stand tube (3), said radially elastic transmission means (7) being radially prestressed by inserting said outer cylindrical surface (2a) of said cylindrical member (2) through said at least one bearing bush (6).
Claim 28
Dependent Claim
42 words
A method as set forth in claim 27, said cylindrical member (2) being provided with at least one tapered spreading surface (2b,2c) for expanding said bearing bush (6), when said cylindrical member (2) is axially inserted through said preassembled guide unit (5,6,7).
Claim 29
Independent Claim
298 words
A method for assembling a support column, said support column comprising a stand tube (3) having an axis, a bottom part (20) and an upper end portion (3a), a receiver bush (5) inserted into said upper end portion (3a), a telescopic positioning device (1) having a lower terminal portion (21) connected to said bottom part (20) of said stand tube (3) and a cylindrical member (2) extending through said receiver bush (5), said cylindrical member (2) having an outer cylindrical surface (2a) guided within said receiver bush (5) in substantially axial direction with respect to said stand tube (3), said outer cylindrical surface (2a) being in sliding engagement with at least one bearing bush (6), said bearing bush (6) being radially supported by said receiver bush (5) through radially elastic transmission means (7), said radially elastic transmission means (7) being radially prestressed, said at least one bearing bush (6) being radially prestressed against said outer cylindrical surface (2a) by the radial prestress of said transmission means (7), said method comprising preassembling said receiver bush (5), said radially elastic transmission means (7) and said at least one bearing bush (6) around said outer cylindrical surface (2a) of said cylindrical member (2), such that said receiver bush (5) provides an external diameter equal or somewhat larger than the internal diameter of said upper end portion (3a) of said stand tube (3) and further comprising inserting said telescopic positioning device (1) with said receiver bush (5), said elastic transmission means (7) and said bearing bush (6) assembled therewith into said stand tube (3), while radially compressing said receiver bush (5), said transmission means (7) and said bearing bush (6) against said outer cylindrical surface (2a) before or during being inserted into said upper end portion (3a) of said stand tube (3).
Claim 30
Dependent Claim
47 words
A method as claimed in claim 29, at least one of said stand tube (3) and said receiver bush (5) being provided with a tapered face for radially compressing said receiver bush (5) when being inserted into said upper end portion (3a) of said stand tube (3).
References Cited (Backward Citations)
DE3627138A1
Cited
EP0325726A1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.