Patent US5131615A successfully refreshed from Google Patents.
US5131615A
Expired / Lapsed
US
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Support column
Assignee: Stabilus GmbH
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Filing: 1991-01-23
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Granted: 1992-07-21
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Expires: 2011-01-23
Abstract
Abstract A chair column comprises a stand tube. A support bush is inserted into the upper end portion of the stand tube. A gas spring cylinder extends axially through the receiver bush. The piston rod is directed downward and is connected with a bottom of the stand tube. The gas spring cylinder is guided through two axially spaced bearing bushes. The bearing bushes are radially supported by the receiver bush through a radially prestressed transmission ring 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 Hosan
- 👤 Axel Knopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:01
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/20; A47C3/30
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
172 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), 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
172 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), 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 3
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 4
Dependent Claim
22 words
A support column as set forth in claim 1, said radially elastic transmission means (7) comprising a radially elastic transmission ring (7).
Claim 5
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 6
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 7
Dependent Claim
36 words
A support column as set forth in claim 3, 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 8
Dependent Claim
34 words
A support column as set forth in claim 3, 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 9
Dependent Claim
26 words
A support column as set forth in claim 1, said radially elastic transmission means comprising a plurality of elastic buffer members (10) distributed around the axis.
Claim 10
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 11
Dependent Claim
20 words
A support column as set forth in claim 8, said buffer members (10) being adherent to said receiver bush (9).
Claim 12
Dependent Claim
25 words
A support column as set forth in claim 1, said receiver bush (5, 9) being subdivided into a plurality of receiver bush segments (5a, 9a).
Claim 13
Dependent Claim
24 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 14
Dependent Claim
19 words
A support column as set forth in claim 12, said segment connection means being press button type connection means.
Claim 15
Dependent Claim
28 words
A support column as set forth in claim 1, said receiver bush (5, 9) being provided with a plurality of recesses (12) in a radially outer surface thereof.
Claim 16
Dependent Claim
38 words
A support column as set forth in claim 1, 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 17
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 18
Dependent Claim
20 words
A support column as set forth in claim 1, said receiver bush (5) being made of a synthetic plastic material.
Claim 19
Dependent Claim
20 words
A support column as set forth in claim 1, said bearing bush (6) being made of a synthetic plastic material.
Claim 20
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 21
Dependent Claim
26 words
A support column as set forth in claim 1, said bearing bush (6) being made of a metal sheet material coated with a bearing surface layer.
Claim 22
Dependent Claim
20 words
A support column as set forth in claim 1, a plurality of bearing bushes (6) being provided along said axis.
Claim 23
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 24
Dependent Claim
26 words
A support column as set forth in claim 21, each of said bearing bushes (6) being combined with separate radially elastic transmission means (7) allocated thereto.
Claim 25
Dependent Claim
36 words
A support column as set forth in claim 1, 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 26
Dependent Claim
57 words
A support column as set forth in claim 1, said telescopic positioning device (1) being a cylinderpiston 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 27
Dependent Claim
44 words
A support column as set forth in claim 1, 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.
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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) | 1995-07-21 | 1996-01-20 | 1996-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-21 | 2000-01-20 | 2000-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-21 | 2004-01-20 | 2004-07-21 | $7700.00 | Window Closed / Lapsed |