GB2346856A - Cycle transmission system - Google Patents

Cycle transmission system Download PDF

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Publication number
GB2346856A
GB2346856A GB9903826A GB9903826A GB2346856A GB 2346856 A GB2346856 A GB 2346856A GB 9903826 A GB9903826 A GB 9903826A GB 9903826 A GB9903826 A GB 9903826A GB 2346856 A GB2346856 A GB 2346856A
Authority
GB
United Kingdom
Prior art keywords
chainwheel
pedal cycle
transmission system
cycle
pedal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9903826A
Other versions
GB9903826D0 (en
Inventor
William Hewitt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB9903826A priority Critical patent/GB2346856A/en
Publication of GB9903826D0 publication Critical patent/GB9903826D0/en
Publication of GB2346856A publication Critical patent/GB2346856A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M1/00—Rider propulsion of wheeled vehicles
    • B62M1/36—Rider propulsion of wheeled vehicles with rotary cranks, e.g. with pedal cranks

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

The system comprises a pedal crank 6 acting on a forward chainwheel 1, which is coupled by a chain to the rear wheel, via an additional transmission, e.g. a chain drive. The chainwheel 1 is located higher than the crank axis to provide increased clearance of the chainwheel. The chainwheel 1 can be interchangeable or a plurality can be provided for variable gearing ratios.

Description

CYCLE TRANSMISSION SYSTEM THIS INVENTION RELATES TO A PEDAL CYCLE PEDAL CYCLES ARE COMMON AND MOST HAVE A DRIVE SYSTEM OF A SIMILAR LAYOUT. A DISADVANTAGE OF THIS CONFIGURATION IS THE VULNERABLE POSITION OF THE FORWARD CHAINWHEEL WHICH IS EASILY DAMAGED WHEN RIDING OVER OBSTACLES.
AN OBJECT OF THIS INVENTION IS TO PROVIDE A CYCLE WITH NO VULNERABLE FORWARD CHAINWHEEL, GIVE INCREASED GROUND CLEARANCE AND ALLOW EXTRA GEARING POSSIBILITIES.
THIS INVENTION PROVIDES A CYCLE WITH THE FORWARD CHAINWHEEL RELOCATED TO A LESS VULNERABLE POSITION.
A PREFERRED EMBODIMENT OF THE INVENTION WILL NOW BE DESCRIBED WITH REFERENCE TO THE ACCOMPANYING DRAWINGS IN WHICH: FIG. l SHOWS A VIEW FROM THE RIGHT HAND SIDE.
FIG. 2 SHOWS A VIEW FROM THE LEFT HAND SIDE AS SHOWN IN FIG. 1, THE CYCLE COMPRISES A FORWARD CHAINWHEEL 1 WHICH HAS BEEN RELOCATED AWAY FROM ITS ORIGINAL POSITION ON THE PEDAL CRANK 6.
AS SHOWN IN FIG. 2, THE MEANS OF TRANSFERRING DRIVE FROM THE PEDAL CRANK 6 TO THE FORWARD CHAINWHEEL 1 VIA AN ADDITIONAL TRANSMISSION SYSTEM COMPRISING OF A LOWER CHAINWHEEL 2 AN UPPER CHAINWHEEL 3 AND CHAIN 4. CHAINWHEELS 1 AND 3 ARE ATTACHED TO A COMMON SHAFT AND BEARING ASSEMBLY.

Claims (4)

  1. CLAIMS 1. A PEDAL CYCLE WITH NO VULNERABLE FORWARD CHAINWHEEL AND INCREASED GROUND CLEARANCE.
  2. 2. A PEDAL CYCLE AS IN CLAIM 1 WITH INTERCHANGEABLE UPPER CHAINWHEELS OF VARYING SIZES AND A CHAIN TENSIONER TO ALLOW A SELECTION OF GEAR RATIOS.
  3. 3. A PEDAL CYCLE AS IN CLAIM 1 WITH TWO OR MORE FIXED UPPER CHAINWHEELS AND A DERAILLEUR SYSTEM OF KNOWN TYPE TO ALLOW THE SELECTION OF EXTRA GEAR RATIOS WHILE ON THE MOVE.
  4. 4. A PEDAL CYCLE SUBSTANTIALLY AS HEREIN DESCRIBED AND ILLUSTRATED IN THE ACCOMPANYING DRAWINGS.
GB9903826A 1999-02-19 1999-02-19 Cycle transmission system Withdrawn GB2346856A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9903826A GB2346856A (en) 1999-02-19 1999-02-19 Cycle transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9903826A GB2346856A (en) 1999-02-19 1999-02-19 Cycle transmission system

Publications (2)

Publication Number Publication Date
GB9903826D0 GB9903826D0 (en) 1999-04-14
GB2346856A true GB2346856A (en) 2000-08-23

Family

ID=10848103

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9903826A Withdrawn GB2346856A (en) 1999-02-19 1999-02-19 Cycle transmission system

Country Status (1)

Country Link
GB (1) GB2346856A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB707857A (en) * 1952-03-26 1954-04-21 Zdenek Martin Burda Improvements in or relating to the propelling mechanism of bicycles
US4666173A (en) * 1985-01-08 1987-05-19 Graham Garnard E Foot pedal drive for bicycles
WO1998022333A1 (en) * 1996-11-15 1998-05-28 Hubert Mourer Driving device for a crank gear machine
US5810379A (en) * 1994-07-18 1998-09-22 Shusterman; G. Todd Freewheeling drivetrain for tandem bicycles
US5876053A (en) * 1996-08-22 1999-03-02 Ray; Rex Russell Conveyer drive system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB707857A (en) * 1952-03-26 1954-04-21 Zdenek Martin Burda Improvements in or relating to the propelling mechanism of bicycles
US4666173A (en) * 1985-01-08 1987-05-19 Graham Garnard E Foot pedal drive for bicycles
US5810379A (en) * 1994-07-18 1998-09-22 Shusterman; G. Todd Freewheeling drivetrain for tandem bicycles
US5876053A (en) * 1996-08-22 1999-03-02 Ray; Rex Russell Conveyer drive system
WO1998022333A1 (en) * 1996-11-15 1998-05-28 Hubert Mourer Driving device for a crank gear machine

Also Published As

Publication number Publication date
GB9903826D0 (en) 1999-04-14

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)