US4635492A — Telescopic assembly

Claim 1

Independent Claim 161 words

A telescopic assembly comprising an inner tube substantially closed at one end and open at the other end, an outer tube substantially closed at one end and open at the other end, said outer tube being movably disposed onto said inner tube, a motive power source having a rotatable hollow output shaft, said motive power source being disposed within said inner tube and affixed to the closed end thereof to prevent rotation therebetween, a screwed spindle affixed to said rotatable output shaft at one end, and a driving tube screwed onto said spindle at one end and affixed to said closed end of the outer tube, whereby rotation of said motor output shaft and said screwed spindle effects reciprocal displacement of said inner tube, said driving tube extends substantially into said hollow output shaft when retracted so that the minimum height of the assembly as well as the length of stroke correspond substantially to the length of said motive power source.

Claim 2

Dependent Claim 161 words

A telescopic assembly comprising an inner tube substantially closed at one end and open at the other end, an outer tube substantially closed at one end and open at the other end, said outer tube being movably disposed onto said inner tube, a motive power source having a rotatable hollow output shaft, said motive power source being disposed within said inner tube and affixed to the closed end thereof to prevent rotation therebetween, a screwed spindle affixed to said rotatable output shaft at one end, and a driving tube screwed onto said spindle at one end and affixed to said closed end of the outer tube, whereby rotation of said motor output shaft and said screwed spindle effects reciprocal displacement of said inner tube, said driving tube extends substantially into said hollow output shaft when retracted so that the minimum height of the assembly as well as the length of stroke correspond substantially to the length of said motive power source.

Claim 3

Dependent Claim 58 words

The telescopic assembly of claim 1, wherein said motive power source including a stator having ball bearings and a rotor having a hollow shaft supported in said ball bearings, said screwed spindle is affixed on said hollow shaft in cantilevered manner and extends through said hollow shaft, at least said stator is rigidly fixed to said inner tube.

Claim 4

Dependent Claim 34 words

The telescopic assembly of claim 1, wherein said driving tube is provided with a screwed sleeve at the other end, whereby rotation of said motive power source effects reciprocal displacement of said driving tube.

Claim 5

Dependent Claim 52 words

The telescopic assembly of claim 1, further comprising means for controlling said motive power source, said control means is disposed within said inner tube and includes at least two limit switches operable by said driving tube for disconnecting said motive power source to control the extension and retraction of said inner tube.

Claim 6

Dependent Claim 63 words

The telescopic assembly of claim 1, further comprising guide members adapted to guide said inner and outer tube, said guide member including a pin and a button shaped portion having a convex surface adapted for lumped bearing of the respective inner tube and outer tube, respectively, said guide members are uniformly divided around the periphery of said inner tube and outer tube, respectively.

Claim 7

Dependent Claim 23 words

The telescopic assembly of claim 5, further comprising elastical means adapted to urge said guide members against the respective inner and outer tube.

Claim 8

Dependent Claim 59 words

The telescopic assembly of claim 1, wherein said inner and outer tube have profiles cooperating together, said inner tube has a profile such that a channel-like compartment is formed between the shell of the motive power source and the inner cross section of said inner tube, which compartment extends substantially over the entire length of the motive power source.

Claim 9

Dependent Claim 43 words

The telescopic assembly of claim 7, wherein a gas pressure means is provided within said channel-like compartment, said gas pressure means is connected to said inner and outer tube and is adapted to assist the motive power source during extension of the assembly.

Claim 10

Dependent Claim 16 words

The telescopic assembly of claim 7, wherein inner and outer tube have a rectangular cross section.

Claim 11

Dependent Claim 35 words

The telescopic assembly of claim 7, wherein the inner and outer tube have a circular cross section, said motive power source is arranged such that the inner and outer tube are rotatable to each other.

Claim 12

Dependent Claim 21 words

The telescopic assembly of claim 1, further comprising a breaking means mounted on the output shaft of the motive power source.

Claim 13

Dependent Claim 39 words

The telescopic assembly of claim 1, further comprising a measuring arrangement adapted to reflect the relative position of said inner tube and of said outer tube, said arrangement is connected with a means for controlling said motive power source.

Claim 14

Dependent Claim 147 words

In combination with furniture, a telescopic assembly comprising an inner tube open at one end and closed at the other end by a mounting plate mounted on the lower side of said furniture, an outer tube open at one end and closed at the other end by a mounting plate adapted to rest on a floor or the like, a motive power source having a rotatable hollow output shaft, said motive power source being disposed within said inner tube and affixed to said mounting plate, a screwed spindle affixed to said rotatable output shaft, and a driving tube screwed onto said spindle at one end and affixed to said mounting plate of said outer tube, whereby rotation of said motor output shaft and said screwed spindle effects an adjustment of the level of said furniture by means of the reciprocal displacement of the inner and outer tube.

Claim 15

Dependent Claim 147 words

In combination with furniture, a telescopic assembly comprising an inner tube open at one end and closed at the other end by a mounting plate mounted on the lower side of said furniture, an outer tube open at one end and closed at the other end by a mounting plate adapted to rest on a floor or the like, a motive power source having a rotatable hollow output shaft, said motive power source being disposed within said inner tube and affixed to said mounting plate, a screwed spindle affixed to said rotatable output shaft, and a driving tube screwed onto said spindle at one end and affixed to said mounting plate of said outer tube, whereby rotation of said motor output shaft and said screwed spindle effects an adjustment of the level of said furniture by means of the reciprocal displacement of the inner and outer tube.

Claim 16

Dependent Claim 45 words

The combination of claim 13, further comprising means for connecting said motive power source to external means selected from the group consisting of an external power source, a control unit adapted to control the adjustment of the level of said furniture, and the combination thereof.

Claim 17

Dependent Claim 14 words

The combination of claim 14, wherein said control unit is mounted onto said furniture.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1990-01-12	1990-07-14	1991-01-13	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1994-01-12	1994-07-14	1995-01-13	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1998-01-12	1998-07-14	1999-01-13	$7700.00	Window Closed / Lapsed

Telescopic assembly

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