Derailleur Guide Device
AssigneeSRAM Deutschland GmbH
InventorMark Santurbane
Life of this patent
Estimating the term…
Abstract
The invention relates to a chain catcher used on multiple chainring arrangements on bicycles in combination with a derailleur to prevent the drive chain from slipping off the smallest chainring into the space between the chainring and the bicycle frame. The embodiment of a chain catcher according to the invention permits especially simple mounting and adjustment by using an additional fastening element. The corresponding method includes completion of the positioning, fastening, and adjustment of the derailleur before the chain catcher is installed.
Claims25
A chain guide arrangement for guiding a drive chain on a set of front chainrings on a bicycle with a bicycle frame, with a chain guide member which is designed for installation on a base part of a front derailleur on the bicycle;
- wherein the chain guide member comprises:
- a mounting section including a mounting opening;
- a guide section which is arranged with an offset from the mounting section, said guide section being positionable adjacent the drive chain;
- a connecting section between the mounting section and the guide section;
- and
- a chain guide mounting element for fastening the mounting section of the chain guide member to the base part of the front derailleur with the front derailleur already attached to the bicycle frame.
A method for installing a chain guide member on a front derailleur for a bicycle with a chain guide mounting element, after the front derailleur has been attached to the bicycle frame without utilizing the chain guide mounting element, comprising the following steps:
- positioning the front derailleur in an optimal position in relation to chainrings of the bicycle;
- fastening the front derailleur on the bicycle frame in the optimal position;
- mounting the chain guide member on the front derailleur by means of the chain guidance mounting element while maintaining the optimal position of the front derailleur in relation to the chainrings;
- and
- adjusting the chain guide member in relation to the chainrings.
A chain guide arrangement for guiding a drive chain on a set of front chainrings on a bicycle with a bicycle frame, the chain guide arrangement comprising:
- a front derailleur including:
- a base part, and
- a front derailleur mounting element for mounting the front derailleur to the bicycle frame;
- a chain guide member mounted to the base part of the front derailleur, the chain guide member including:
- a mounting section,
- a guide section which is arranged with an offset from the mounting section, the guide section positionable to guide the drive chain,
- a connecting section between the mounting section and the guide section, and
- a chain guide mounting element separate from the front derailleur mounting element for fastening the mounting section of the chain guide member to the base part of the front derailleur.
Dependencies are inferred from the claim text.