Main Frame, Front Fork, and Bicycle Frame Comprising Same
OwnerJohannes Alderse Baasinventor
Life of this patent
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Abstract
The invention relates to a main frame (1) for a bicycle having a saddle and a front wheel and a rear wheel, which are arranged in alignment, which main frame is produced in a closed mold from a thermoplastic resin, the main frame being in the form of a single-piece hollow article (2) having a frame wall (3) which encloses the cavity thereof, and the frame wall (3) of the hollow article (2) consisting of one piece produced by means of rotational molding in a rotary mold that can be heated from the outside. The invention also relates to a front fork and to a bicycle frame comprising the main frame and the front fork.
Claims51
A main frame (1) for a bicycle with a saddle, as well as with a front wheel and a rear wheel, which are arranged in one track, produced from a thermoplastic in a closed mould, wherein it is designed as a one-piece hollow body (2) with a frame wall (3) surrounding its cavity, and in that the frame wall (3) of the hollow body (2) has a one-piece nature, which is produced by means of a rotational moulding in an externally heatable rotational mould.
A main frame (1) for a bicycle with a saddle, as well as with a front wheel and a rear wheel, which are arranged in one track, produced from a thermoplastic, wherein a main support (4) and a one-sided rear wheel support (5) are comprised in one piece, wherein the rear wheel support (5) is designed as a hollow body (2), the rear wheel support (5) forms an encapsulating housing (16) for a drive means, and that the rear wheel support (5) includes a rear wheel receiver (19), wherein the main support (4) is designed hollow overall with opposite frame walls (3a, 3b) and is designed in one piece with the rear wheel support (5).
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A front fork (40) for a bicycle, which has a saddle, and which is provided with a front wheel and a rear wheel, which are arranged single-tracked, produced from a thermoplastic in a closed mould, wherein the front fork includes at least one fork leg (42, 43) formed as a hollow fork body (50) with a fork wall (51), and in that the fork wall (51) of the hollow fork body (50) has a one-piece nature, which is produced with a rotational moulding in an externally heatable rotational mould.
A front fork (40) for a bicycle, which has a saddle, and which is provided with a front wheel and a rear wheel, which are arranged single-tracked, formed in one piece from a thermoplastic, comprising either a fork leg (42, 43) located on one side and having an upper end and a lower end or two such fork legs (42, 43) arranged symmetrically, wherein a receiving opening (56, 58) is provided in each case at the lower end of the fork leg or the lower ends of the two fork legs (42, 43), and wherein the receiving opening (56, 58) is adapted to hold a front axle (59), wherein a fork bridge region (41), to which, on one side, a fork arm (44, 45) which is oriented upwards is attached or two symmetrically arranged fork arms (44, 45) which are oriented upwards are attached, is formed at the upper end of the fork leg (42, 43).
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A bicycle component part from the group:
- main frame, front fork and wheel, comprising a one-piece hollow body (50) with a component part wall (51) surrounding its cavity, wherein the component part wall (51) of the hollow body (50) is produced from a thermoplastic in a closed mould, wherein the component part wall (51) has a one-piece nature, which is produced by means of a rotational moulding in an externally heatable mould designed for the rotational moulding, with the additional proviso that a foam is arranged in the cavity, and that the foam extends at least partially as a foam layer (126) over the inside of the component part wall (51) or completely fills the cavity as a foam filling (125).
A method for manufacturing a main frame (1) for a bicycle where a front wheel and a rear wheel are arranged in one track, the method comprising:
- pouring a thermoplastic material into a rotational mould having a negative shape of the main frame;
- closing the rotational mould;
- rotating about at least one axis while externally heating the rotational mould;
- solidifying the main frame;
- and
- opening the rotational mould to remove the main frame from the rotational mould, and
- wherein the main frame is designed as a one-piece hollow body (2) with a frame wall (3) surrounding its cavity, and in that the frame wall (3) of the hollow body (2) has a one-piece structure.
Dependencies are inferred from the claim text.