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US 6,471,178 B1Granted
Device for adjusting the length of a support and method for producing same
AssigneeCabex AG
InventorPeter Del Conte
Life of this patent
Estimating the term…
Abstract
The invention relates to a device comprising a substantially tubular inner part (10) and a fluid-impermeable piston (4) stored therein. The base (41) of the piston (4) and a seal (70) form a unit.
Claims31
Equipment for an adjustment of a length of a support for chairs or tables, with one essentially tubular interior part and with a piston (4) which is supported in an interior part in a fluid tight manner, characterized in that a main body (41) of the piston (4) and a seal (70) on the piston form an unit,
- wherein the piston (4) shows a disk shaped main body (41) made of a stiff material, that an opening (104) exists in a middle area of this main body (41), that the seal (70) surrounds the outer edge part of the main body (41) and that the seal extends from the outer edge part away against the opening (104) in the piston main body (41),
- wherein the main body (41,81,91) of the piston is flat or has a form of a plate or disk or a flat bowl having a bottom (82, 92) and a wall (83, 93), that the wall (83) of the main body (81) of the piston stands practically rectangularly to the bottom (82) or that the wall (93) stands to the bottom (92) under an angle, which angle is larger than 90 degrees and smaller than 180 degrees.
Equipment for an adjustment of a length of a support for chairs or tables, with one essentially tubular interior part and with a piston (4) which is supported in an interior part in a fluid tight manner, characterized in that a main body (41) of the piston (4) and a seal (70) on the piston form an unit,
- wherein the piston (4) shows a disk shaped main body (41) made of a stiff material, that an opening (104) exists in the middle area of this main body (41), that the seal (70) surrounds the outer edge part of the main body (41) and that the seal extends from the outer edge part away against the opening (104) in the piston of the main body (41),
- wherein an outer edge part (44) of the main body (41) of the piston (4) is carried out as an outer edge which extends continuously over the whole periphery of the main body (41) or that radial extending cuts (101) are carried out in the outer edge part of the piston main body (41) which are placed along the periphery of the main body (41) in distances of each other, that a segment (102) is placed between neighboring cuts (101) whereby said segment extends in a radial direction, and that the material of a sealing ring (70,85,95) lies not only on a large surface of the segment (102) but also in the cuts as well as gaps (101) between neighboring segments (102).
Equipment for an adjustment of a length of a support for chairs or tables, with one essentially tubular interior part and with a piston (4) which is supported in an interior part in a fluid tight manner, characterized in a main body (41) of the piston (4) and a seal (70) on the piston form an unit,
- wherein the piston (4) shows a disk shaped main body (41) made of a stiff material, an opening (104) exists in the middle area of this main body (41), that the seal (70) surrounds the outer edge part of the main body (41) and that the seal extends from the outer edge part away against the opening (104) in the main body (41) of said piston,
- wherein the seal (70) has a form of a hollow ring, that this hollow ring (70) includes an upper wall (71) lying on the main body of said piston as well as a low and at an underside of the main body of said piston lying wall (72), that these walls (71,72) extends at least essentially radial and at least essentially parallel to each other, that each of these walls (71,72) has the form of said ring, that the outer edges of these ring walls (71,72) are together interconnected by means of a peripheral wall (73) which is in one piece with the ring walls (71, 72), and that a cavity is open in such a sealing ring (70) in the area of the inner edges (76,77) of the ring walls (71,72).
Equipment for an adjustment of a length of a support for chairs or tables, with one essentially tubular interior part and with a piston (4) which is supported in an interior part in a fluid tight manner, characterized in that a main body (41) of the piston (4) and a seal (70) on the piston form an unit,
- wherein the piston (105) shows a stiff insert (120) having a form of a flat ring as well as a seal (130), that the insert is embedded in the seal so, that a middle part (125) of the insert (120) is free or accessible from a side of the seal (130), that the middle part (125) of an annular insert is executed springily and that the end portion (116) of the piston (105) assigned to the piston (105) is pocketed in the middle part (125) of an annular insole (120).
Equipment for an adjustment of a length of a support
- having an essentially tubular interior part,
- having a piston (4) which is movable in the interior part in a fluid tight manner,
- the piston (4) comprising a main body (41) provided with a seal (70), whereby an opening (104) exists in the middle area of this main body (41) and,
- the piston (4) further comprising a piston rod (5), one end portion of the piston rod is provided with a circular step, so that a pivot (60) extends from the front end surface (62) of this end portion of the piston rod (5), whereby said pivot (60) is aligned with a longitudinal axis C of the main body (59) of the piston rod (5) and whereby the main body (41) of the piston (4) is put up on said pivot (60),
- characterized in that
- the main body (41) of the piston (5) has the shape of a ring,
- that the seal (70) has a form of an essentially flat and hollow ring in which the main body (41) of the piston (5) is placed,
- that the cross section of one-half of the seal (70) has the shape of an U,
- that said hollow ring (70) includes an upper wall (71) and a lower wall (72) representing the legs or shanks of said U-shape,
- that ring shaped walls (71,72) of the seal (70) have the form of essentially flat rings extending at radial with respect to said longitudinal axis C and parallel to each other, so that the seal (70) surrounds the outer edge part of the main body (41) of the piston and extends from the outer edge part away against the opening (104) in the piston main body (41),
- that the outer edges of ring shaped walls (71,72) are together connected by means of a peripheral wall (73) which represents the bottom of said U-shape and which is in one piece with said ring shaped walls (71, 72) and
- that the outer surface (75,79) of this peripheral wall (73) is convex.
9 more elements
Equipment for an adjustment of a length of a support for chairs or tables,
- having an essentially tubular interior part,
- having a piston (4) which is movable in the interior part in a fluid tight manner,
- the piston (4) comprising a main body (41) provided with a seal (70), whereby an opening (104) exists in the middle area of this main body (41) and,
- the piston (4) further comprising a piston rod (5), one end portion of said piston rod is provided with a circular step, so that a pivot (60) extends from the front end surface (62) of this end portion of the piston rod (5), whereby said pivot (60) is aligned with a longitudinal axis C of the main body (59) of the piston rod (5) and whereby the main body (41) of the piston (4) is put up on said pivot (60),
- characterized in that
- the piston (103) shows a stiff insert (120) having a form of a flat ring and
- that the piston (105) is secured on the piston rod (5) by aid of a spring arrangement,
- characterized in the main body (121) of the stiff insert (120) which stands practically rectangularly to the longitudinal axis C of the piston rod (5), that the middle part of this insert (120) has an opening (125), so that the insert (120) has an outer edge (122) and an inner edge (123), that the inner edge (123) is provided with tongues (126) which stand away from the interior edge (123) and which are distributed along this interior edge (123), that a respective tongue (126) extends in radial direction with respect to the longitudinal axis C and the respective tongue (126) has the form of a ring sector, that the contour of the outer edge (122) is circular, that outer edge (122) is embedded in the interior of the seal (130), so that the middle part (125) of the insert (120) is free or accessible from one side of the seal (130), and that the end portion (116) of the piston (105) is placed in the springly part (125) of the insert (120).
5 more elements
Dependencies are inferred from the claim text.