GB2593748A - The combination of a seat tube and seat post for a cycle - Google Patents

The combination of a seat tube and seat post for a cycle Download PDF

Info

Publication number
GB2593748A
GB2593748A GB2004771.8A GB202004771A GB2593748A GB 2593748 A GB2593748 A GB 2593748A GB 202004771 A GB202004771 A GB 202004771A GB 2593748 A GB2593748 A GB 2593748A
Authority
GB
United Kingdom
Prior art keywords
combination
seat
stop
seat post
seat tube
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.)
Granted
Application number
GB2004771.8A
Other versions
GB202004771D0 (en
GB2593748B (en
Inventor
Lewis Cumberpatch Jon
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.)
Pashley Holdings Ltd
Original Assignee
Pashley Holdings Ltd
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 Pashley Holdings Ltd filed Critical Pashley Holdings Ltd
Priority to GB2004771.8A priority Critical patent/GB2593748B/en
Publication of GB202004771D0 publication Critical patent/GB202004771D0/en
Priority to DE102021107633.1A priority patent/DE102021107633A1/en
Publication of GB2593748A publication Critical patent/GB2593748A/en
Application granted granted Critical
Publication of GB2593748B publication Critical patent/GB2593748B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B62H—CYCLE STANDS; SUPPORTS OR HOLDERS FOR PARKING OR STORING CYCLES; APPLIANCES PREVENTING OR INDICATING UNAUTHORIZED USE OR THEFT OF CYCLES; LOCKS INTEGRAL WITH CYCLES; DEVICES FOR LEARNING TO RIDE CYCLES
    • B62H5/00—Appliances preventing or indicating unauthorised use or theft of cycles; Locks integral with cycles
    • B62H5/001—Preventing theft of parts or accessories used on cycles, e.g. lamp, dynamo
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62H—CYCLE STANDS; SUPPORTS OR HOLDERS FOR PARKING OR STORING CYCLES; APPLIANCES PREVENTING OR INDICATING UNAUTHORIZED USE OR THEFT OF CYCLES; LOCKS INTEGRAL WITH CYCLES; DEVICES FOR LEARNING TO RIDE CYCLES
    • B62H5/00—Appliances preventing or indicating unauthorised use or theft of cycles; Locks integral with cycles
    • B62H5/006—Appliances preventing or indicating unauthorised use or theft of cycles; Locks integral with cycles acting on the saddle
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motorcycle And Bicycle Frame (AREA)

Abstract

A combination of a seat tube 12 and seat post 10 for a cycle includes a first stop 46 at the lower end of the seat post, the first stop 46 protruding at the lower end of the seat post in a direction radially outwardly with respect to the longitudinal axis of the seat post 10. A second stop 66 is fast with the seat tube 12, and located between the seat tube 12 and the seat post 10. The stops 46, 66 are such that they interengage to prevent removal of the seat post 10 from the seat tube 12. The first stop 46 may be a flange secured to the bottom of the seat post 10. The second stop 66 may be a split sleeve and may be secured to the seat tube 12 by a screw 14 passing through a clamp 13.

Description

The Combination of a Seat Tube and Seat Post for a Cycle The invention relates to the combination of a seat tube and seat post for a cycle.
It is desirable to be able to retain a seat post of a bicycle or tricycle within the frame of the bicycle or tricycle to prevent theft. The seat post height should still be able to be adjusted but removal is prevented. This is particularly important for public hire schemes or fleet bike use.
A known arrangement for retaining the seat post is shown in Fig 1. In this arrangement, a rigid rod 1 has a cylindrical block 2 mounted to one end. There is a threaded bore 20 in the cylindrical block 2 and an aperture (not shown) in the seat tube 4 so that a security type bolt 3 can be passed through the aperture and into the threaded bore 20 to secure the block 2 to the seat tube 4 of the bicycle frame. At the other end of the rod 1 is a disc 5 which is secured to the rod 1 with a bolt 6 which passes perpendicularly through the disc 5 by passing through a central aperture 24 in the disc 5 and into an axial screw threaded bore 26 in the end of the rod 1. The rod assembly is able to slide within the seat post 7 as the seat post 7 is raised and lowered. At the bottom of the seat post 7 is a screw threaded axial bore 28 and an end cap 8 with a screw thread 30 that is screwed into the screw threaded axial bore 28 in the bottom of the seat post 7. The end cap 8 has a central aperture 32 which slidingly receives the rod 1 and through which the disc 5 cannot pass thereby preventing the seat post 7 from being removed from the seat tube 4. In this way, the seat post 7 can be raised and lowered over a reasonable distance, but it cannot be removed from the seat tube 4. At least, it cannot be removed without specialist tools to undo the security bolt 3.
The cylindrical block 2 occupies space within the seat tube 4 of the frame, and this space could otherwise be used for other purposes.
According to the invention, there is provided the combination of a seat tube and seat post for a cycle, the combination including: a first stop at the lower end of the seat post, the first stop protruding at the lower end of the seat post in a direction radially outwardly with respect to the longitudinal axis of the seat post, and, -a second stop fast with the seat tube, and located between the seat tube and the seat post, the stops being such that they interengage to prevent removal of the seat post from the seat tube.
As the first stop is at the lower end of the seat post, the whole region below the lower end of the seat post is available space for other items, such as an electric motor. The combination of the invention is very compact. It is seen that the rod assembly of the prior arrangement has been completely eliminated.
The first stop may comprise a single protrusion or may comprise a plurality of protrusions. The first stop may protrude on opposite sides of the seat post. In a preferred embodiment, the first stop comprises a flange which may be substantially continuous around the seat post axis. The first stop may be carried by a member, which may be mounted on the seat post by being received in the end of the seat post. The member may be screw threaded so as to be screwed into a screw thread in the lower end of the seat post.
The second stop may take any suitable form, and may present a stop surface which extends around at least half of the circumference of the seat tube. The word "circumference" is intended to cover both seat tubes of circular cross-section and also seat tubes of non-circular cross section, such as aerodynamic seat tubes of tear drop cross section. Preferably the second stop presents a stop surface which extends around at least two thirds, and preferably at least three quarters of the circumference of the seat tube, most preferably extending around substantially the full circumference of the seat tube.
The second stop may form the lower edge of a sleeve. The sleeve may include a split from its upper edge. This is particularly the case where the sleeve overlaps portion of the seat tube which also includes a split.
The second stop may be made fast with the seat tube by one or more bolts, which may pass through the seat tube. The or each bolt may also pass through the seat clamp. The or each bolt may therefore perform a dual function of attaching both the seat clamp and the second stop. The or each bolt may be a security bolt.
The second stop may include a lip that sits against the upper end of the seat tube.
The second stop may be made from any suitable material and may be made from a low friction material or a self lubricating material such as a plastics material such as nylon.
An embodiment of the invention will now be described by way of example and with reference to the accompanying drawings, in which: Fig la is a side elevation of a known seat post and seat tube arrangement; Fig lb is a side elevation of the arrangement of Figla in cross-section; Fig 2a is a side elevation of the seat post and seat tube arrangement of the embodiment of the invention, and; Fig 2b is a side elevation of the arrangement of Fig 2a in cross-section.
The embodiment of the invention as shown in Figs 2a and 2b comprises a seat tube 12 and seat post 10.
In the bottom end of the seat post 10 is an end cap 9. The bottom end of the seat post 10 defines a screw thread 40 and the end cap 9 defines an outer thread 42 on its main body 44. The lower part of the end cap 9 defines a radially outwardly extending flange 46 of a greater diameter than the diameter of the seat post 10. The upwardly facing surface 48 of this flange 46 forms the aforesaid "first stop".
A sleeve 11 with an axially extending slot (not shown) from its upper edge 52 is inserted into the seat tube 12 of the cycle frame. The sleeve 11 has a lip 54 extending radially outwardly from its upper edge 52 that sits against the upper end 56 of the seat tube 12. A seat clamp 13 fits around the top section 58 of the seat tube 12. This clamp 13 also features a lip 60 which sits on the top of the sleeve 11. The clamp 13 is secured to the seat tube 12 using two security type bolts 14. These bolts 14 pass though corresponding holes 62, 64 in the seat tube 12 and sleeve 11 but do not contact the seat post 10. The holes 64 in the sleeve 11 have a screw thread to receive the bolts 14.
The bottom edge 66 of the sleeve 11 forms the aforesaid "second stop".
The seat post 10 is able to move up and down within the sleeve 11 within the seat tube 12. However, if removal of the seat post 10 is attempted, the upwardly facing surface 48 of the flange 46 of the end cap 9 will hit the bottom 66 of the sleeve 11, preventing further movement of the seat post 10 and hence preventing its removal.
The embodiment of the invention uses fewer parts than the previously described arrangement and is lighter and quicker to assemble. It also requires less space within the seat tube.
In one embodiment, an [-bike motor can be installed in place of a conventional bottom bracket, which would not be possible in the known arrangement described above as there is not enough space.
The sleeve 11 is a replaceable part and prevents wear to the inside surface of the seat tube 12. The sleeve 11 could be made of a self lubricating material such as nylon to enable smooth operation of the seat post 10.

Claims (20)

  1. CLAIMS1. The combination of a seat tube and seat post for a cycle, the combination including: a first stop at the lower end of the seat post, the first stop protruding at the lower end of the seat post in a direction radially outwardly with respect to the longitudinal axis of the seat post, and, a second stop fast with the seat tube, and located between the seat tube and the seat post, the stops being such that they interengage to prevent removal of the seat post from the seat tube.
  2. 2. The combination as claimed in claim 1, wherein the first stop comprises a single protrusion.
  3. 3. The combination as claimed in claim 1 or claim 2, wherein the first stop protrudes on opposite sides of the seat post.
  4. 4. The combination as claimed in claim 1,2 or 3, wherein the first stop comprises a flange.
  5. 5. The combination as claimed in claim 4, wherein the flange is substantially continuous around the seat post axis.
  6. 6. The combination as claimed in any preceding claim, wherein the first stop is carried by a member, the member being mounted on the seat post by being received in the end of the seat post.
  7. 7 The combination as claimed in claim 6, wherein the member is screw threaded so as to be screwed into a screw thread in the lower end of the seat post.
  8. 8. The combination as claimed in any preceding claim, wherein the second stop presents a stop surface which extends around at least half of the circumference of the seat tube.
  9. 9 The combination as claimed in claim 8, wherein the second stop presents a stop surface which extends around at least two thirds of the circumference of the seat tube.
  10. The combination as claimed in claim 8, wherein the second stop presents a stop surface which extends around at least three quarters of the circumference of the seat tube.
  11. 11. The combination as claimed in claim 8, wherein the second stop presents a stop surface which extends around substantially the full circumference of the seat tube.
  12. 12. The combination as claimed in any preceding claim, wherein the second stop forms the lower edge of a sleeve.
  13. 13. The combination as claimed in claim 12, wherein the sleeve includes a split from its upper edge.
  14. 14. The combination as claimed in claim 12 or claim 13, wherein the sleeve is made from a low friction material.
  15. 15. The combination as claimed in claim 12, 13 or 14, wherein the sleeve is made from a plastics material
  16. 16. The combination as claimed in claim 15, wherein the sleeve is made from nylon.
  17. 17. The combination as claimed in any preceding claim, wherein the second stop is made fast with the seat tube by one or more bolts, which pass through the seat tube.
  18. 18. The combination as claimed in claim 17, wherein the or each bolt also passes through the seat clamp of the seat tube.
  19. 19. The combination as claimed in claim 17 or claim 18, wherein the or each bolt is a security bolt.
  20. 20. The combination as claimed in any preceding claim, wherein the second stop includes a lip that sits against the upper end of the seat tube.
GB2004771.8A 2020-03-31 2020-03-31 The combination of a seat tube and seat post for a cycle Active GB2593748B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2004771.8A GB2593748B (en) 2020-03-31 2020-03-31 The combination of a seat tube and seat post for a cycle
DE102021107633.1A DE102021107633A1 (en) 2020-03-31 2021-03-26 Combination of a seat tube and a seat post for a bicycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2004771.8A GB2593748B (en) 2020-03-31 2020-03-31 The combination of a seat tube and seat post for a cycle

Publications (3)

Publication Number Publication Date
GB202004771D0 GB202004771D0 (en) 2020-05-13
GB2593748A true GB2593748A (en) 2021-10-06
GB2593748B GB2593748B (en) 2024-03-20

Family

ID=70553423

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2004771.8A Active GB2593748B (en) 2020-03-31 2020-03-31 The combination of a seat tube and seat post for a cycle

Country Status (2)

Country Link
DE (1) DE102021107633A1 (en)
GB (1) GB2593748B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07277244A (en) * 1994-04-12 1995-10-24 Matsushita Electric Ind Co Ltd Device for limiting raised height of bicycle seat post
DE102004009927A1 (en) * 2004-02-26 2005-09-15 Markus Schulz Device for mounting of saddle support on especially bicycle frame has devices to prevent saddle support rotating around tube axis and comprises longitudinal slot formed on support or on frame tube and protrusion engaging in it
US9981707B1 (en) * 2017-11-14 2018-05-29 Kalloy Industrial Co., Ltd. Anti-theft device for bicycle seat post

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07277244A (en) * 1994-04-12 1995-10-24 Matsushita Electric Ind Co Ltd Device for limiting raised height of bicycle seat post
DE102004009927A1 (en) * 2004-02-26 2005-09-15 Markus Schulz Device for mounting of saddle support on especially bicycle frame has devices to prevent saddle support rotating around tube axis and comprises longitudinal slot formed on support or on frame tube and protrusion engaging in it
US9981707B1 (en) * 2017-11-14 2018-05-29 Kalloy Industrial Co., Ltd. Anti-theft device for bicycle seat post

Also Published As

Publication number Publication date
DE102021107633A1 (en) 2021-09-30
GB202004771D0 (en) 2020-05-13
GB2593748B (en) 2024-03-20

Similar Documents

Publication Publication Date Title
US5469726A (en) Nut locking apparatus
US8448971B2 (en) Seat anti-theft assembly and method of installing the same
US6165092A (en) Guide assembly for a bicycle
US5586472A (en) Detachable bicycle pedal mounting structure
US5947498A (en) Modular telescopic front fork assembly
US5517878A (en) Handlebar to steerer clamping device for bicycles
US20050081678A1 (en) Bicycle crank assembly
US5465634A (en) Handlebar assembly for cycles
CN105059456B (en) Bicycle handle bar's clamp assembly
DE102007046301B4 (en) Bicycle sprocket with mounting cover
DE69524085T2 (en) WHEEL RING AND WHEEL NUT MOUNTING SYSTEM
US5201244A (en) Bicycle handlebar stem extender
US20070052201A1 (en) Bicycle pedal
JPH02212201A (en) Quick release device for bicycle hub and quick release fixing device for bicycle seat each having anti-robbery function
US20210023895A1 (en) Tubeless valve assembly
GB2593748A (en) The combination of a seat tube and seat post for a cycle
TW200918395A (en) Clamping device
CN114379694B (en) Pedal of bicycle
US5413365A (en) Wheel spindle
US10759484B2 (en) Height adjustment assembly for bicycle saddle
DE102017007362A1 (en) Electric motor, in particular for vehicles
CN1069879C (en) Coil core holder for coil frame
CN210828781U (en) Mute anticreep slot door sliding block set spare and elevator
DE1455665A1 (en) Independent suspension for motor vehicles
CN220243449U (en) Whole inner wiring front fork assembly and bicycle