Classifications

• • 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
  • B62H5/08—Appliances preventing or indicating unauthorised use or theft of cycles; Locks integral with cycles preventing the drive
  • B62H5/10—Appliances preventing or indicating unauthorised use or theft of cycles; Locks integral with cycles preventing the drive acting on a pedal crank

Definitions

• the invention relates to a device for theft prevention, suitable to be used with a bicycle that may optionally be provided with a motor, and that is designed to work together with a crankshaft of the bicycle, comprising a crank to be mounted on the crankshaft and provided with a pedal, a coupling member to be operated with an external key, having an uncoupled position and a coupled position, where in the uncoupled position the crank is allowed to run clear of the crankshaft, and in the coupled position the crank and the crankshaft are coupled so as to be rotatingly fixed to each other .
• a drawback of the device known from this publication is that it cannot be used for existing bicycles since the use of this known device requires the design of the crankshaft of the bicycle and its housing to be modified and adapted to the design of the device.
• a related problem is that the use for newly to be manufactured bicycles is costly because of the referred-to required structural adaptations to the bicycle.
• a complicating factor is that, according to the type of bicycle, the crankshaft housings are supplied in various sizes and designs, so that equally many adaptations need to be made to these designs before the device for theft prevention pro- posed in the German Utility Model can be employed.
• the object of the invention is to provide a generally usable device for theft prevention that can be employed without structural adaptation of existing, or newly to be manufactured bicycles.
• a device is proposed for this purpose that complies with one or several of the appended claims.
• the device is characterised in that the coupling member is exclusively and entirely accommodated in a break-proof housing located at an end of the crank opposite the end where the pedal is mounted, with the coupling member being equipped to work together with a standard model crankshaft.
• the theft prevention device is easy to implement as a device that may replace a standard crank. Fitting the device according to the invention suffices to convert an existing bicycle or to provide a newly to be manufactured bicycle that meets the requirements of theft prevention as intended with the invention.
• the coupling member of the device according to the invention may conveniently be embodied such that the same comprises a first plate that is adjustable between the uncoupled position and the coupled position, being rotatingly fixed with the housing and being provided with means for coupling to or, as the case may be, releasing a base plate that is mounted so as to be rotatingly fixed on the crankshaft.
• the means of the first plate are pins or projections and that the base plate has recesses for receiving these first pins or projections.
• the device is characterised in that the housing possesses a locking plate facing away from the crankshaft, which when the coupling member is in the uncoupled position, is secured against removal.
• the locking plate and the housing possess an inter- mating thread, and that the locking plate at its side facing toward the interior of the housing, and the first plate at its side facing toward the locking plate are provided with coupling means working together that are active in the uncoupled position of the coupling member. It is advantageous that the coupling means are formed by intermating second pins or projections and respective recesses.
• mounting or demounting of the device can in fact take place when the coupling means are not active, i.e. when the crank and the crankshaft are in the coupled position.
• FIG. 1 an exploded view of a device according to the invention
• FIG. 5 and 6 a cut-away view of the device according to the invention mounted on a crankshaft, and - Figure 7 an inside of the locking plate of the device according to the invention.
• crankshaft housing 1 is shown, with which the person skilled in the art is quite familiar, and accommodated therein a standard model crankshaft 2.
• the device according to the invention comprises a crank A provided with a pedal 12, with Figure 1 clearly show- ing that at its end facing away from the pedal 12, the crank possesses a housing 4.
• This housing 4 is break-proof, which will also be further explained in the description below.
• a base plate 5 that can be placed at the inside of the housing, is mounted on the crankshaft 2 by means of a bolt 3.
• the crank as such is indeed mounted, it is able to rotate freely because the coupling between the base plate 5 and the crank or the housing of the crank 4 is not a rotat- ingly fixed coupling.
• the crank 4 mounted thus with the aid of the base plat 5 is shown in Figure 2.
• the coupling member comprises the components that in Figure 1 are identified by reference numbers 6 to 11. These components may be assembled in advance and work together in such a way that with the aid of an external key the crank or the housing 4 and the base plate 5 can be coupled or uncoupled in a manner that will be explained later on.
• FIG 1 clearly shows that the coupling member 6,7,8,9,10,11 comprises a first plate 8 which, as will also be explained later on, is adjustable between an uncoupled position and a coupled position, and which is coupled so as to be rotatingly fixed with the housing 4 of the crank.
• the first plate 8 works together with the first sleeve 7 and the bearing disk 9, which are provided with external key ways that are able to intermate with keys incorporated in the housing 4 of the crank. Rotation of the crank thus also causes rotation of the first plate 8.
• first plate 8 is pro- vided with means in the form of first pins disposed perpendicularly on the plate 8 at the side of the first sleeve 7, which pins are able to intermate with recesses in the base plate 5.
• the first plate 8 In order to move the first plate 8 so as to realise the changeover between the uncoupled position and the coupled position, the first plate 8 is mounted on a second sleeve 6, with the second sleeve 6 having an exterior and the first plate 8 having an interior thread, which are able to intermate.
• the second sleeve 6 further possesses a lock and an end projecting through the centre of the locking plate 10, such that the lock can be operated with a key and the second sleeve can be turned. As a result of said threaded coupling this turning causes the movement of the first plate 8.
• the Figures 3 and 5 show the first plate 8 in the uncoupled position wherein the first pins of the first plate 8 are clear of the recesses in the base plate 5. In this way the crank and housing 4 are able to rotate freely around this (stationary) base plate 5, making cycling impossible.
• the Figures 4 and 6 show the coupling member in the coupled position. Figure 6 clearly shows that the respective first pins of the first plate 8 have been moved to project into the recesses of the base plate 5, so that when the crank and housing 4 rotate, the first plate 8 is rotatingly fixed thereto and - via the said pins - the base plate 5 coupled thereto will rotate also and will make cycling possible.
• the housing has a locking plate 10 facing away from the crankshaft 2, which when the coupling member 6,7,8,9,10,11 is in the uncoupled position, is secured against removal.
• the locking plate 10 and the housing have an intermating thread and that (see also Figure 7) the locking plate 10, at its side facing toward the interior of the housing, and the first plate 8 at its side facing toward the locking plate 10, are provided with intermating coupling means that are active in the uncoupled position of the coupling member 6,7,8,9,10,11 shown in Figure 5.
• sec- ond pins mounted on the first plate 8 and oriented toward the locking plate 10 project into recesses of the locking plate 10. These recesses are provided at the inside of the locking plate 10, as shown in Figure 7. Due to this provision the locking plate 10 cannot be unscrewed from the housing and can consequently not be removed.
• Figure 6 finally, which relates to the device according to the invention while the coupled position between the crank 4 and the crankshaft 2 is in effect, shows that the respective second pins of the first plate 8 no longer project into the recesses of the locking plate 10, such that in this coupled position the locking plate 10 can be removed, making demounting (and also mounting) of the device possible.
• the above elucidation and the exemplary embodiment employed therein are expressly intended as non-limiting with regard to the protective scope merited by the essence of the invention.
• the example and the given explanation merely serve for the clarification of any possible ambiguities that may be contained in the appended claims, without in any way limiting these with respect to the protective scope, which is determined by the essence of the invention, in accordance with the subject matter of the appended claims.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Lock And Its Accessories (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=31885142

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (2)

• 2003
  • 2003-01-20 NL NL1022433A patent/NL1022433C2/nl not_active IP Right Cessation
• 2004
  • 2004-01-20 WO PCT/NL2004/000045 patent/WO2004069635A1/en active Application Filing

Patent Citations (2)

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