US3788587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient column
Assignee: Stabilus Industrie und Handels GmbH
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Filing: 1972-12-05
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Granted: 1974-01-29
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Expires: 1992-12-05
Abstract
Abstract The single column supporting the seat of a stool or chair consists of two telescoping tubes and a pneumatic spring in the communicating bores of the tubes, the cylinder of the spring being secured to the tube attached to the seat and the piston rod being secured to the tube attached to the base of the chair by a spring washer. A circumferential groove near the free end of the piston rod is engaged by tongs extending into the central opening of the spring washer so that the piston rod may be pulled loose of the base and the associated tube by manual tension. The cylinder may be attached to the seat by a variety of fasteners which either respond to axial tension in the manner of the aforedescribed spring washer or may be removed manually without the use of tools.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:48
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/50; B60N2/509; A; A47; A47C; A47C3/00; A47C3/20; A47C3/30; B60N2/52; B60N2/522; B60N2/527
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
176 words
A resilient column comprising, in combination: a. an elongated tubular element having a longitudinal axis; b. a load carrier element; c. a pneumatic spring partly received in said tubular element, said spring including 1. a cylinder member elongated in the direction of said axis and bounding a cavity therein, 2. a body of gas under a pressure higher than atmospheric pressure in said cavity, 3. a piston slidable in said cavity in said direction in sealing engagement with said cylinder member, and 4. a piston rod member fastened to said piston for joint movement, a portion of said piston rod member projecting from said cylinder member in said direction; d. first fastening means securing said cylinder member to one of said elements; and e. second fastening means securing said piston rod member to the other element, 1. at least one of said fastening means including yieldably resilient catch means responsive to manual tension applied to said elements in said direction for releasing one of said members from the element fastened thereto by said one fastening means.
Claim 2
Dependent Claim
176 words
A resilient column comprising, in combination: a. an elongated tubular element having a longitudinal axis; b. a load carrier element; c. a pneumatic spring partly received in said tubular element, said spring including 1. a cylinder member elongated in the direction of said axis and bounding a cavity therein, 2. a body of gas under a pressure higher than atmospheric pressure in said cavity, 3. a piston slidable in said cavity in said direction in sealing engagement with said cylinder member, and 4. a piston rod member fastened to said piston for joint movement, a portion of said piston rod member projecting from said cylinder member in said direction; d. first fastening means securing said cylinder member to one of said elements; and e. second fastening means securing said piston rod member to the other element, 1. at least one of said fastening means including yieldably resilient catch means responsive to manual tension applied to said elements in said direction for releasing one of said members from the element fastened thereto by said one fastening means.
Claim 3
Dependent Claim
14 words
a body of gas under a pressure higher than atmospheric pressure in said cavity,
Claim 4
Dependent Claim
14 words
a body of gas under a pressure higher than atmospheric pressure in said cavity,
Claim 5
Dependent Claim
17 words
A column as set forth in claim 1, wherein said one element is said load carrier element.
Claim 6
Dependent Claim
28 words
A column as set forth in claim 2, wherein said load carrier element has a tubular portion enveloping said cylinder member in telescoping engagement with said tubular element.
Claim 7
Dependent Claim
17 words
a piston slidable in said cavity in said direction in sealing engagement with said cylinder member, and
Claim 8
Dependent Claim
17 words
a piston slidable in said cavity in said direction in sealing engagement with said cylinder member, and
Claim 9
Dependent Claim
53 words
a piston rod member fastened to said piston for joint movement, a portion of said piston rod member projecting from said cylinder member in said direction; d. first fastening means securing said cylinder member to one of said elements; and e. second fastening means securing said piston rod member to the other element,
Claim 10
Dependent Claim
53 words
a piston rod member fastened to said piston for joint movement, a portion of said piston rod member projecting from said cylinder member in said direction; d. first fastening means securing said cylinder member to one of said elements; and e. second fastening means securing said piston rod member to the other element,
Claim 11
Dependent Claim
32 words
A column as set forth in claim 3, further comprising base means fastened to said tubular element for holding said axis upright when said base means is set on a horizontal surface.
Claim 12
Dependent Claim
34 words
A column as set forth in claim 4, wherein said load carrier element has a load receiving face extending from said axis in all radial directions and substantially horizontal when said axis is upright.
Claim 13
Dependent Claim
83 words
A column as set forth in claim 1, wherein said one fastening means secures said piston rod member to said tubular element, and said catch means includes a centrally apertured spring disc having a plurality of integral tong portions projecting into the central aperture thereof, and securing means axially securing said spring disc in said tubular element, said piston rod member being formed with at least one recess receiving said tong portions when said piston rod member is fastened to said tubular element.
Claim 14
Dependent Claim
39 words
A column as set forth in claim 6, wherein said piston rod member tapers from said at least one recess in a direction away from said piston for facilitating insertion of said piston rod member into said central aperture.
Claim 15
Dependent Claim
47 words
A column as set forth in claim 6, further comprising abutment means on said tubular element preventing axial movement of said piston rod member under compressive forces applied to said elements beyond a position of engagement of said recess in said piston rod member by said tongs.
Claim 16
Dependent Claim
32 words
A column as set forth in claim 8, wherein said abutment means include an abutment member, said securing means jointly securing said abutment member and said spring disc in said tubular element.
Claim 17
Dependent Claim
86 words
A column as set forth in claim 1, wherein said one fastening means secures said cylinder member to said load carrier element, said cylinder member and said load carrier element constituting a pair of releasably fastened members, one member of said pair being formed with a recess transverse to said axis, and said catch means being mounted on the other member of the pair and extending into said recess of the one member of the pair when fastening the members of said pair to each other.
Claim 18
Dependent Claim
35 words
A column as set forth in claim 10, wherein said catch means include a catch member and yieldably resilient means biasing said catch member inward of the recess in said one member of said pair.
Claim 19
Dependent Claim
55 words
A column as set forth in claim 1, wherein said one fastening means secures said piston rod member to said tubular element, said catch means being operatively interposed between said piston rod member and said tubular element, said first fastening means including manually releasable means for securing said cylinder member to said load carrier element.
Claim 20
Dependent Claim
76 words
A column as set forth in claim 12, wherein said load carrier element has a tubular portion enveloping said cylinder member in telescoping engagement with said tubular element, said tubular portion being formed with a radial bore, said cylinder member being formed with a recess aligned with said bore, and said manually releasable means include a locking member accessible from outside said tubular portion and passing through said bore into the recess of said cylinder member.
Claim 21
Dependent Claim
30 words
A column as set forth in claim 13, further comprising yieldably releasable means outside said tubular portion and biasing said locking member inward of said bore and of said recess.
Claim 22
Dependent Claim
46 words
A column as set forth in claim 13, further comprising abutment means on said load carrier element preventing axial movement of said cylinder member under compressive forces applied to said element beyond a position of engagement of said recess in said cylinder by said locking member.
Claim 23
Dependent Claim
40 words
A coluMn as set forth in claim 1, wherein said piston separates two compartments in the cavity of said cylinder member, and said pneumatic spring further includes by-pass valve means operable for connecting said compartments and for sealing the same.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |