Guide device for the axial sliding of a telescopic element with respect to a fixed element

Abstract

A guide device for the axial sliding of a first telescopic element, in particular connected to the seat-part of a seat, with respect to a second fixed element, in particular connected to the base of the seat, wherein the second fixed element comprises a first profile shaped so as to define internally—first vertical guide means, with which interposition means cooperate, interposed between the first telescopic element and the second fixed element, in order to promote the reciprocal axial sliding of the first telescopic element with respect to the second fixed element.

1 . A guide device for allowing the axial sliding of a first telescopic element, connected to a seat-part of a seat, with respect to a second fixed element, connected to a base of said seat,
 wherein said second fixed element comprises a first profile shaped to define internally first vertical guide means, with which interposition means cooperates, interposed between said first telescopic element and said second fixed element, to promote the reciprocal axial sliding of said first telescopic element with respect to said second fixed element, and   wherein said interposition means comprises first sliding means, protruding radially from said first telescopic element.   
   
   
       2 . (canceled) 
   
   
       3 . (canceled) 
   
   
       4 . A guide device as in  claim 1 , wherein said sliding means comprises pads fixed to the external surface of said first telescopic element and made of low friction coefficient material. 
   
   
       5 . A guide device as in  claim 1 , wherein said first guide means and said first sliding means are positioned radially at 120 degrees with respect to a longitudinal axis (Y) common to said first telescopic element and said second fixed element. 
   
   
       6 . (canceled) 
   
   
       7 . A guide device as in  claim 1 , wherein said second fixed element comprises second sliding means that protrude radially towards the inside and cooperate with the external surface of said first telescopic element. 
   
   
       8 . A guide device as in  claim 7 , wherein said first telescopic element comprises a second profile shaped to define on the external surface thereof a plurality of flat faces with which said second sliding means cooperates. 
   
   
       9 . A guide device as in  claim 8 , wherein said second sliding means and said flat faces are positioned radially at 120 degrees with respect to said longitudinal axis (Y) and are off-set angularly by 60 degrees with respect to said first guide means. 
   
   
       10 . A guide device as in  claim 8 , wherein said second profile is shaped to define internally second vertical guide means, with which third sliding means cooperates, protruding radially from a third profile disposed inside said first telescopic element. 
   
   
       11 . A guide device as in  claim 10 , wherein said second guide means and said third sliding means are positioned radially at 120 degrees with respect to said longitudinal axis (Y) and are off-set angularly by 60 degrees with respect to said first guide means. 
   
   
       12 . (canceled) 
   
   
       13 . A guide device as in  claim 1 , wherein said interposition means comprises roller means, and
 wherein said first guide means comprises first seatings made longitudinally on the internal surface of said second fixed element, into each of which a first metal blade is inserted, on which said roller means is able to roll.   
   
   
       14 . (canceled) 
   
   
       15 . A guide device as in  claim 13 , wherein on the external surface of said first telescopic element second seatings are made longitudinally, disposed in correspondence with said first seatings, into each of which a second metal blade is inserted, on which said roller means is able to roll. 
   
   
       16 . A guide device as in  claim 1 , also comprising a springing unit in turn comprising:
 adjustment means of the elastic type, disposed inside said first telescopic element and able to adjust in height the level of said first telescopic element with respect to said second fixed element, and   a springing mechanism, able to allow the vertical springing of said first telescopic element with respect to said second fixed element.   
   
   
       17 . A guide device as in  claim 10 , wherein said third profile is connected both to said adjustment means and also to said springing mechanism. 
   
   
       18 . A guide device as in  claim 16 , wherein said adjustment means comprises one or more gas or mechanical springs. 
   
   
       19 . A guide device as in  claim 16 , wherein said springing mechanism comprises springing means and deadening means. 
   
   
       20 . A guide device as in  claim 19 , wherein said deadening means comprises a shock absorber disposed centrally, at the side of which two gas springs are disposed. 
   
   
       21 . (canceled) 
   
   
       22 . A guide device as in  claim 19 , comprising a gas spring disposed centrally and wherein said deadening means comprise two shock absorbers disposed at the sides of said gas spring. 
   
   
       23 . (canceled) 
   
   
       24 . (canceled) 
   
   
       25 . A guide device as in  claim 19 , also comprising an adjustment mechanism for pre-loading said springing means, which in turn comprises:
 a first toothed wheel able to rotate around said axis (Y), to selectively drive a grub screw mechanism able to translate axially a thrust block, which cooperates from below against said springing means, and   a second toothed wheel engaged with said first toothed wheel and driven by a command rod, which forms an acute angle (α) with respect to said axis (Y), to be near a substantially vertical position, or slightly inclined.   
   
   
       26 . (canceled) 
   
   
       27 . A guide device as in  claim 16 , also comprising a command unit, able to selectively command said adjustment means and comprising in turn a command lever pivoted to the lower part of said seat-part and able to drive a central platelet, with which lever means cooperates, which controls said spring means to command, from any angular position of the seat-part whatsoever, the drive of said adjustment means. 
   
   
       28 . A guide device as in  claim 1 , also comprising a mechanism with coaxial flanges, which is able to allow the rotation through 360 degrees of said seat-part and is provided with a pair of flanges, solid with said first telescopic element and defining an annular seating, in which a rotary flange is able to slide rotatably, which is solid with said seat-part. 
   
   
       29 . A seat for public transport means, for trams, buses, trucks, for office use or other, comprising a guide device as in  claim 1 . 
   
   
       30 . A guide device as in  claim 16 , wherein said third profile is connected both to said adjustment means and also to said springing mechanism.