The present invention concerns a tow element for coupling a tow lift to a bicycle, a method for towing of a bicycle with a tow lift, a method for producing a tow element and a method for converting a tow lift.
Downhill cycling, on bicycles such as off-road bicycles, mountain bikes, snow bikes, fat bikes or all-terrain bicycles (ATB's), enjoys an ever-increasing popularity. In order to arrive at the uphill starting point for a downhill ride, the bicycle and cyclist need to be transported uphill. Preferably, existing infrastructure is used thereto, such as tow lifts, originally intended for skiers. Such a tow lift transports a skier uphill by towing, where the skier glides uphill while holding on to, or being supported by a tow element of the tow lift. The tow element may be rope-shaped, loop-shaped, T-shaped, J-shaped, or disk-shaped. Each tow element is suspended from a recoiling cable, tensioning the tow element when in use and vertically retracting the tow element when not in use. To tow a bicycle with mounted cyclist, the tow lift must be converted, by adapting or replacing the tow elements thereof. With such a converted tow lift, the bicycle can be towed uphill, with the cyclist remaining seated on the bicycle. During uphill towing, the cyclist must steer and balance the bicycle.
Known tow lift conversions utilize tow elements shaped as clamps or hooks. The clamp or hook may be clamped or hooked onto one or more parts of a bicycle, such as the frame, the steering column, the steering bar, or the saddle bar. Thereby the bicycle and mounted cyclist can be towed uphill, while the wheels of the bicycle remain in contact with the ground surface.
A major danger during the uphill towing of a bicycle with mounted cyclist, is that the bicycle may become unstable. Instability may, for instance, occur due to the rough terrain or due to the cyclist losing control over the bicycle. When instability occurs during towing, it is imperative that the bicycle is released from the tow lift as quickly as possible. Otherwise, the bicycle with mounted cyclist could fall over, while continuing to be towed uphill, thereby risking material damage to the bicycle and/or physical injury to the cyclist. Additionally, it is advantageous that the bicycle can swiftly be released from the tow lift when arriving at the uphill end station thereof. However, no prior tow element conversion provides a satisfactory level of safety by allowing a swift and reliable release from the tow lift.
Consequently, there is a clear and urgent need to provide improved means for coupling a bicycle to a tow lift, whereby the bicycle and mounted cyclist can quickly and reliably be released from the tow lift when arriving at the uphill tow lift end station or when instability occurs during towing and a fall is imminent.
The present invention concerns a tow element for coupling a tow lift to a bicycle, the tow element characterized by comprising:
In another aspect, the present invention concerns a method for converting a tow lift, the method comprising:
In yet another aspect, the present invention concerns a method for towing a bicycle with a tow lift according to claim 11, the method comprising:
In yet another aspect, the present invention concerns a method for producing a tow element according to any of claims 1-10, the method comprising:
A tow element 1 according to the invention is schematically shown in
The tow loop 1a comprises a loop portion 1e and two side portions 1f. The loop portion 1e connects the end parts of the side portions 1f to form a loop shape, shown in
The side portions 1f are partially inserted into the tube 1c and fixed in place, as schematically shown in
As schematically shown in the side view of
The tow loop 1a may comprise a metal, such a metal tube or metal rod. Alternatively, the side portions 1f may comprise metal tubes and the loop portion 1e may comprise a metal wire cord, where the metal wire cord is threaded through the tubes of the side portions 1f. A polymer coating or sleeve may be provided on the tow loop 1a, to improve impact damping and to protect the bicycle stem and the tow loop 1a from scratches. Alternatively, the tow loop 1a may comprise a polymer, such as a molded polymer part. The molded polymer part may be reinforced with glass fibers or carbon fibers.
The tow element 1 may optionally comprise a release tab. The release tab is configured to be clamped between the tow loop 1a and the stem 3a. At one end, the release tab is fixed to the tow loop 1a. The other end of the release tab is a free end. Advantageously, when losing balance during towing or when arriving uphill, a cyclist may grab the free end of the release tab and tension the release tab. Due to the release tab being clamped between the tow loop 1a and the stem 3a, a tensioning of the release tab unhooks the tow loop 1a from the stem 3a and tips the tow loop 1a over the stem 3a. Thereby, the tow loop 1a is quickly and reliably released from the stem 3a and the bicycle is released from the tow lift.
The release tab may comprise a webbing, preferably of a polymer material, such as a nylon, propylene, or polyester. The release tab is preferably fixed to the at least one cross-rib 1g. Thereto, one end of the release tab may be wrapped around the at least one cross rib 1g and fixed in place by means of Velcro or by being sewing. Advantageously, by releasably fixing the release tab with Velcro the release tab can easily be replaced. The free end of the release tab may be stiffened, by a stiffening member or by being fixed in a double folded state. Advantageously, the stiffened free end can more easily be grabbed.
The tube 1c, schematically shown in length-wise cross-section in
The optional grip 1b is placed at or near the end of the tube 1c from which the tow loop 1a extends. The grip 1b may be placed such that one end of the grip 1b coincides with the end of the tube 1c. Alternatively, the grip 1b may be placed such that one end of the grip 1b is distanced from the end of the tube 1c. The grip 1b may be formed as a sleeve, as a winding, as an extruded part, as a one-piece moulded part, or as a multi-piece moulded part. The grip 1b may be held in place on the tube 1c by elastic tension, by mechanical fastening means and/or by an adhesive. The grip 1b may comprise a rubber material, such as a neoprene rubber, a silicone material, a fabric material, a polymer foam material, or a solid polymer material. The solid or foamed polymer material may comprise polyethylene, polypropylene, polyvinylchloride, thermoplastic polyurethane, or any other suitable polymer. The grip 1b may be formed with one or more bulges, to improve holding comfort and purchase for a user. The grip 1b may further comprise a patterned or roughened outer surface, to improve grabbing friction of the grip 1b. Advantageously, the grip provides improved friction for secure grabbing and pulling of the tube, during hooking and unhooking of the tow loop, as well as improved comfort during grabbing and holding. Preferably, the grip 1b comprises a vibrant color such as red, orange, or yellow. It is thereby quickly seen where the tube 1c should be grabbed, which is especially advantageous in situations where a fall is imminent and fast unhooking of the tow loop is required.
The tow element 1 also comprises a connector 1d, configured to connect the tow element 1 to a recoiling cable of a tow lift. The connector 1d is connected to the end of the tube 1c, opposite to the tow loop 1a. The connector 1d may be connected to the tube 1c so as to be freely rotatable around the longitudinal axis of the tube 1c. Alternatively, the connector 1d may be connected to tube 1c by a fixed, non-rotating connection. The connector may be connected to the tube 1b by means of a mechanical connection, a spring-loaded connection, by gluing or by welding. The connector 1d may be partially inserted in the tube 1c, as schematically shown in
The tow loop 1a, the tube 1c, the clamping piece and the connector 1d may each comprise the same or different materials, such as a metal, a polymer, or a composite material. Suitable metals are aluminum or anodized aluminum, galvanized steel, or stainless steel. Suitable polymers are acrylonitrile butadiene styrene, polycarbonate, polyethylene, or polypropylene. Suitable composites are glass fiber polymer composite or carbon fiber polymer composite. Preferably, the tube 1c and the connector 1d comprise aluminum or anodized aluminum and the clamping piece comprises a polyethylene.
The tow element 1 may further comprise a sleeve 1i, schematically shown in
A system for coupling a tow lift to a bicycle comprises the tow element 1 and may further comprise a harness. The harness comprises a stem part, schematically shown in
The stem part is configured to be installed on the stem 3a of a bicycle, as detailed below. The stem part comprises a main loop 2a and one or more fastening ribbons 2b extending from the main loop. Preferably two fastening ribbons are provided. The one or more fastening ribbons 2b may be provided with connection means, such as Velcro strips or a side release buckle. Advantageously, the connection means can easily be adjusted to different stem sizes and shapes. The stem part may further comprise a coupling means 2c, such as a loop.
The waist part comprises a closeable loop, configured to be fastened around the waist of a cyclist. The closeable loop comprises closing means 2e, such a side release buckle, Velcro strips, a two-part clasp or a hook and loop fastener. Preferably, the closing means 2e allow the closeable loop to be adjusted to the waist-size of the cyclist. The waist part further comprises a coupling ribbon 2f, extending from the closeable loop, and coupling means 2d, fixed to the coupling ribbon 2f and configured to couple the coupling ribbon 2f to the stem part. The coupling ribbon 2f may further comprise an elastic portion 2g, comprising an elastic material, such as rubber or elastane. Advantageously, the elastic portion 2g allows a mounted cyclist to adjust sitting position without being immediately restrained by the harness. The coupling means 2d may be a hook or a carabiner, configured to hook into the coupling loop 2c. Alternatively, a side release buckle, Velcro strips, or a two-part clasp may be provided.
A tow lift according to the invention comprises a plurality of recoiling cables and at least one tow element according to the invention. At least one of the recoiling cables is connected to a tow element 1. The recoiling cable is connected to the connector 1d of the tow element 1.
A method for towing a bicycle with a tow lift comprises providing a plurality of recoiling cables and at least one tow element 1 according to the invention. The tow loop 1a is hooked onto the stem 3a of the bicycle, schematically shown in a side view in
Additionally, the bicycle and cyclist may be coupled by the harness. Thereto, the stem part is installed on the stem 3a, schematically shown in sideview in
A method for producing a tow element 1 comprises providing a tow loop 1a, wherein the tow loop 1a may comprise a metal or a polymer. A metal tow loop 1a may be formed by stamping or bending metal tubes or metal rods to form the side portions 1f, the loop portion 1e and optionally, the at least one cross-rib 1g. The at least one cross-rib 1g and loop portion 1e may then be welded onto the side portions 1f. Alternatively, the side portions 1f may comprise metal tubes and the loop portion 1e may comprise a metal wire cord, which is threaded through the side portions 1f. A polymer coating or sleeve may next be applied to the tow loop 1a. A polymer tow loop 1a may be formed by injection molding the side portions 1f, loop portion 1e and the at least one cross-rib 1g as a single polymer part. The polymer may be reinforced with glass fibers or carbon fibers.
The method for producing a tow element 1 further comprises providing a tube 1c and a connector 1d. The tow loop 1a is coupled to one end of the tube 1c. Preferably an end portion of the side portions 1f are inserted into a clamping piece 1h and fixed thereto. The clamping piece 1h with inserted side portions 1f is next placed in one end of the tube 1c and fixed thereto. The connector 1d is formed or coupled to the opposite end of the tube 1c. Preferably, the connector 1d is coupled to the tube 1c to be freely rotatable around the longitudinal axis of the tube 1c.
A method for converting a tow lift comprises providing a tow lift with at least one recoiling cable and providing the at least one recoiling cable with a tow element 1 according to the invention. Coupling the tow element 1 comprises coupling the connector 1d of the tow element 1 to the end part of a recoiling cable. The connecter 1d may be coupled to the recoiling cable by a crew connection or by means of an adaptor coupling.
Number | Date | Country | Kind |
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20210382 | Mar 2021 | NO | national |
20211137 | Sep 2021 | NO | national |
Filing Document | Filing Date | Country | Kind |
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PCT/EP2022/057436 | 3/22/2022 | WO |