Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
  • B62J1/00—Saddles or other seats for cycles; Arrangement thereof; Component parts
  • B62J1/02—Saddles resiliently mounted on the frame; Equipment therefor, e.g. springs
  • B62J1/06—Saddles capable of parallel motion up and down
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
  • B62K19/00—Cycle frames
  • B62K19/30—Frame parts shaped to receive other cycle parts or accessories
  • B62K19/36—Frame parts shaped to receive other cycle parts or accessories for attaching saddle pillars, e.g. adjustable during ride

Definitions

• the present patent application for industrial invention relates to a device used to adjust the height of the saddle while riding a bicycle, which comprises a special pneumatic jack, whose automatic extension is determined by a valve that can be manually adjusted with a control lever suitably located on the bicycle frame.
• the height of the saddle from the ground can be adjusted by means of locking devices located on the bicycle frame, basically consisting in a clamp located at the beginning of the rod that supports the stem of the saddle.
• the adjustment of the saddle is always a difficult operation, being the result of two opposite needs: the need to adjust the saddle in such a way that the user can touch the ground with his/her feet without getting off the bicycle, and the need to completely extend his/her legs when pedalling. It appears evident that if the user wants to pedal correctly he/she must adjust the saddle in such a way that his/her leg will reach the maximum extension when the pedal reaches the bottom dead centre.
• the device of the invention which basically comprises a tubular rod that supports the saddle, is inserted and slides within a tube that is in turn inserted and tightened inside the tubular vertical rod that supports the saddle in ordinary bicycles. It must be remembered that the tubular vertical rod ends with a tightening clamp used to adjust the height of the saddle.
• the rod that supports the saddle houses a special pneumatic jack, whose sleeve is fixed on the bottom of the tube, while the stem of the jack is connected to the rod that supports the saddle in such a way that the expulsion and retraction of the stem correspond to an identical lowering or raising travel of the saddle mounted on top of the tubular rod.
• the special characteristic of the pneumatic jack is represented by the fact that it is provided with a valve that prevents the stem from sliding when the valve is closed. On the contrary, when the valve is open, both the automatic expulsion and forced retraction of the stem are possible.
• - Fig. 1 is the cross-section of the device mounted inside the tube with a vertical plane
• the device (1 ) is composed of a tube (2) with circular section whose lower part is closed with a bottom (3) and whose upper part is closed with a collar (4) in which a tubular rod (5) is inserted and slides, supporting the saddle (6).
• a pneumatic jack (7) is housed and slides inside the tubular rod (5).
• the sleeve of the jack (7) is equipped with a bracket (8) used to fix it with a plug (9) to the bottom (3) of the tube (2).
• the lower end of the tubular rod (5) is provided with a piston (11) with central hole, which slides freely outside the sleeve of the jack (7) and inside the tube (2).
• An "L-shaped" bracket (10) is fixed on top of the stem (7a) of the jack (7), whose vertical arm (10a) has a hole for a plug (12) that connects the bracket (10) to the tubular rod (5), which therefore follows the travels of the stem (7a).
• the tubular rod (5) has a slot (5a) from which the horizontal arm (10b) of the bracket (10) laterally protrudes, on which a sheath (13) is stopped, in which a cable (14) slides and is hooked to a control lever (15), pivoted on the bracket (10), designed to open the valve (16), normally closed, located on top (7b) of the stem (7a).
• the other end of the cable (14) is hooked to a second lever mounted on the bicycle frame in an easily accessible position for the user.
• the main characteristic of the jack (7) - normally available on the market - consists in the fact that the stem (7a) cannot slide until the valve (16) remains closed.
• the stem (7a) When the valve (16) is opened, the stem (7a) is automatically expelled because of the compressed gas contained inside the jack (7), in which the stem (7a) can be reinserted by pushing it strongly enough to overcome the expulsive pressure of the gas.
• the downward travel of the rod (5) corresponds to the downward travel of the saddle which allows the user to touch the ground with his/her feet by simply extending his/her legs without getting off the saddle and without tilting the bicycle laterally.
• tubular rod (5) During its alternated travels the tubular rod (5) is driven by the piston (11 ) and by the collar (4). Attention is drawn on the fact that the tubular rod (5) preferably has square cross-section, in order to prevent possible rotations inside the tube (2) which would correspond to the undesired rotation of the saddle mounted on top of the rod (5).

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Steering Devices For Bicycles And Motorcycles (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=11437379

Family Applications (1)

Country Status (3)

Cited By (3)

Citations (5)

• 2002
  • 2002-06-11 IT IT2002AN000027A patent/ITAN20020027A1/it unknown
  • 2002-09-11 AU AU2002341392A patent/AU2002341392A1/en not_active Abandoned
  • 2002-09-11 WO PCT/IT2002/000577 patent/WO2003104072A1/en not_active Application Discontinuation

Patent Citations (5)

Non-Patent Citations (1)

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