GB2290271A - Adjustable handlebar and seat extension tube for a pedal cycle - Google Patents

Adjustable handlebar and seat extension tube for a pedal cycle Download PDF

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Publication number
GB2290271A
GB2290271A GB9412194A GB9412194A GB2290271A GB 2290271 A GB2290271 A GB 2290271A GB 9412194 A GB9412194 A GB 9412194A GB 9412194 A GB9412194 A GB 9412194A GB 2290271 A GB2290271 A GB 2290271A
Authority
GB
United Kingdom
Prior art keywords
tube
extension tube
seat extension
adjustable handlebar
seat
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Withdrawn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
GB9412194A
Other versions
GB9412194D0 (en
Inventor
Richard Draper
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 GB9412194A priority Critical patent/GB2290271A/en
Publication of GB9412194D0 publication Critical patent/GB9412194D0/en
Publication of GB2290271A publication Critical patent/GB2290271A/en
Withdrawn legal-status Critical Current

Links

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
    • B62J1/08—Frames for saddles; Connections between saddle frames and seat pillars; Seat pillars
    • 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
    • B62K21/00—Steering devices
    • B62K21/12—Handlebars; Handlebar stems
    • B62K21/16—Handlebars; Handlebar stems having adjustable parts therein

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Control Devices (AREA)

Abstract

The adjustable handlebar and seat extension tube comprises a top tube 1 having a pivotal adjustment with respect to a bottom tube 2 is fixed into the pedal cycle frame. A pivotal bolt (5), nuts (3) and spacing washers (4) clamp top tube 1 and bottom tube 2 at the required angle. Thus the seat and handlebars of the pedal cycle can be adjusted in position independently of each other. <IMAGE>

Description

ADJUSTABLE HANDLEBAR AND SEAT EXTENSION TUBE FOR A PEDAL CYCLE The invention relates to an adjustable seat or handlebar extension tube.
Current handlebar and seat extension tubes for pedal cycles are well known parts of pedal cycles which allow the seat and handlebars to be fixed to the pedal cycle frame. They have the form of a straight tube which is bolted into the frame of a pedal cycle and rises out of the frame as an extension of either the seat tube or head tube, in the case of the handlebars.
The adjustment of seat or handlebar positions relative to each other is rather limited and this is the critical dimension for the comfortable use of the pedal cycle.
According to the present invention there is provided an adjustable extension tube comprising a top tube, a bottom tube and a means of securing the two tubes at the required angle by a clamping bolt at the centre of the pivotal axis. The full adjustment range to be from horizontal to horizontal through one hundred and eighty degrees.
A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which : FIG 1 shows an isometric detail, full size, of the assembled tubes, without pivotal bolt, in the ninety degree position, FIG 2 iilustrates the proposed pivotal bolt clamping mechanism.
FiG 3 shows the whole working mechanism in side elevation.
Referring to the drawing FIG 1 the adjustable extension tube comprises a top tube 1 and a bottom tube 2.
In order to adjust the angle between 1 and 2, a pivotal bolt 5 as shown in FIG 2 with nuts 3 and spacing washers 4 grips the webs of top tube 1 to the webs of bottom tube 2.

Claims (7)

1. An adjustable handlebar and seat extension tube, for a pedal cycle, comprising a top tube, a bottom tube and a pivotal centre bolt, with spacing washers, to provide a means of adjustment to the required angle and securing at the angle set.
2. An adjustable handlebar and seat extension tube as claimed in claim 1 which allows the positions of the handlebars and seat to be adjusted in position relative to each other.
3. An adjustable handlebar and seat extension tube as claimed in claim 1 and claim 2 which aids the comfortable use of a pedal cycle.
Amendments to the claims have been filed as follows 1. An adjustable handlebar and seat extension tube for a pedal cycle, comprising a top tube, a bottom tube and a pivotal, double ended, centre bolt, with spacing washers, to provide a means of adjustment to the required angle and securing at the angle set by a symmetrical clamping force on the interlocking web mechanism from both sides simultaneously along the pivotal axis.
2. An adjustable handlebar and seat extension tube as claimed in claim 1 which allows the positions of the handlebars and seat to be adjusted in position relative to each other.
3. An adjustable handlebar and seat extension tube as claimed in claims 1 and 2. The clamping mechanism relies on friction between the surfaces of the interlocking webs to clamp top tube 1 to bottom tube 2 in the required position.
4. An adjustable handlebar and seat extension tube as claimed in claim 3 where the multiple positioning of the tubes is therefore not limited other than by the 180 degree horizontal to horizontal rotation range.
5. An adjustable handlebar and seat extension tube where the system of interlocking webs of top tube 1 and bottom tube 2 which, because of their arrangement, number and dimensions are to provide stability to the clamped mechanism, both laterally and vertically, when the mechanism is in use.
6. An adjustable handlebar and seat extension tube as claimed in any previous claim where the mechanism is intended to be used for either or both handlebar and seat extension tube applications.
7. An adjustable handlebar and seat extension tube as claimed in any previous claim where the dimensions of the interlocking webs are not restricted by the diameter of the top or bottom tubes. Therefore the interlocking webs could be increased in dimension to increase stability without reducing the adjustability of the mechanism.
GB9412194A 1994-06-17 1994-06-17 Adjustable handlebar and seat extension tube for a pedal cycle Withdrawn GB2290271A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9412194A GB2290271A (en) 1994-06-17 1994-06-17 Adjustable handlebar and seat extension tube for a pedal cycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9412194A GB2290271A (en) 1994-06-17 1994-06-17 Adjustable handlebar and seat extension tube for a pedal cycle

Publications (2)

Publication Number Publication Date
GB9412194D0 GB9412194D0 (en) 1994-08-10
GB2290271A true GB2290271A (en) 1995-12-20

Family

ID=10756900

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9412194A Withdrawn GB2290271A (en) 1994-06-17 1994-06-17 Adjustable handlebar and seat extension tube for a pedal cycle

Country Status (1)

Country Link
GB (1) GB2290271A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322344A (en) * 1997-02-19 1998-08-26 Richard Draper Adjustable handlebar and seat extension tubes for a bicycle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1085598A (en) * 1965-04-05 1967-10-04 Francesco Cesare Rizzato An improved adjustable cycle seat
WO1991019636A1 (en) * 1990-06-18 1991-12-26 Thoeny Franz Steering rod connectable to the steering column of a vehicle
EP0497429A1 (en) * 1991-01-31 1992-08-05 Batavus B.V. Adjustable handlebar stem

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1085598A (en) * 1965-04-05 1967-10-04 Francesco Cesare Rizzato An improved adjustable cycle seat
WO1991019636A1 (en) * 1990-06-18 1991-12-26 Thoeny Franz Steering rod connectable to the steering column of a vehicle
EP0497429A1 (en) * 1991-01-31 1992-08-05 Batavus B.V. Adjustable handlebar stem

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322344A (en) * 1997-02-19 1998-08-26 Richard Draper Adjustable handlebar and seat extension tubes for a bicycle
GB2322344B (en) * 1997-02-19 1999-07-14 Richard Draper Adjustable extension arrangement for a pedal cycle

Also Published As

Publication number Publication date
GB9412194D0 (en) 1994-08-10

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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)