Electrically assisted cycle kit
First Claim
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1. An electrically assisted cycle kit for fitting to a pedal cycle to convert the pedal cycle into an electrically assisted pedal cycle, the electrically assisted cycle kit comprising:
- an electric motor for assisting pedal cycle motion of the pedal cycle;
a battery for powering the electric motor;
a gear tooth sensor for providing a gear motion signal indicative of at least one of (i) a speed of motion of gear teeth and valleys of an existing rear sprocket of the pedal cycle relative to the gear tooth sensor, said existing rear sprocket not provided in said electrically assisted cycle kit, and (ii) an acceleration of motion of the gear teeth and valleys of the existing rear sprocket of the pedal cycle relative to the gear tooth sensor; and
a controller for controlling a drive of the electric motor in dependence on the gear motion signal provided by the gear tooth sensor.
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Accused Products
Abstract
An electrically assisted cycle kit (50) for fitting to a pedal cycle (2) comprises an electric motor (58) for assisting pedal cycle motion, a battery (52) for powering the motor (58), and a controller (60) for controlling the drive of the motor (58). A gear tooth sensor (65) provides a gear motion signal indicative of the speed/acceleration of motion of gear teeth (94) and valleys (95) of a gear sprocket (32) of the cycle. The controller controls the drive of the motor (58) in dependence on the gear motion signal.
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Citations
20 Claims
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1. An electrically assisted cycle kit for fitting to a pedal cycle to convert the pedal cycle into an electrically assisted pedal cycle, the electrically assisted cycle kit comprising:
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an electric motor for assisting pedal cycle motion of the pedal cycle; a battery for powering the electric motor; a gear tooth sensor for providing a gear motion signal indicative of at least one of (i) a speed of motion of gear teeth and valleys of an existing rear sprocket of the pedal cycle relative to the gear tooth sensor, said existing rear sprocket not provided in said electrically assisted cycle kit, and (ii) an acceleration of motion of the gear teeth and valleys of the existing rear sprocket of the pedal cycle relative to the gear tooth sensor; and a controller for controlling a drive of the electric motor in dependence on the gear motion signal provided by the gear tooth sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An electrically assisted cycle kit for fitting to a pedal cycle, the electrically assisted cycle kit comprising:
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an electric motor for assisting pedal cycle motion of the pedal cycle; a battery for powering the electric motor; a gear tooth sensor for providing a gear motion signal indicative of at least one of (i) a speed of motion of gear teeth and valleys of a gear sprocket of the pedal cycle relative to the gear tooth sensor, and (ii) an acceleration of motion of the gear teeth and valleys of the gear sprocket of the pedal cycle relative to the gear tooth sensor; and a controller for controlling a drive of the electric motor in dependence on the gear motion signal provided by the gear tooth sensor; wherein the controller is configured to determine a ground speed of the pedal cycle from the gear motion signal provided by said gear tooth sensor also used by the controller for controlling the drive of the electric motor. - View Dependent Claims (16, 17, 18)
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19. An attachment for attaching an object to a pedal cycle, comprising a support platform for attaching to a frame of the pedal cycle and a support arm for connecting the object to the support platform;
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wherein the object is connected to the support arm via a joining portion comprising a first portion connected to the object and a second portion connected to the support arm, wherein a first side of the first portion and a second side of the second portion are pressed against each other; and one of said first side of the first portion and said second side of the second portion comprises a notch, and another of said first side of the first portion and said second side of the second portion comprises a projection for engaging with the notch.
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20. A method of fitting an electrically assisted cycle kit to a pedal cycle, the method comprising:
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attaching an electric motor to the pedal cycle for assisting pedal cycle motion of the pedal cycle; attaching a gear tooth sensor to the pedal cycle for providing a gear motion signal indicative of at least one of (i) a speed of motion of gear teeth and valleys of an existing rear sprocket of the pedal cycle relative to the gear tooth sensor, said existing rear sprocket not provided in the electrically assisted cycle kit, and (ii) an acceleration of motion of the gear teeth and valleys of the existing rear sprocket of the pedal cycle relative to the gear tooth sensor; attaching a controller to the pedal cycle and connecting the controller to the electric motor and the gear tooth sensor for controlling the drive of the electric motor in dependence on the gear motion signal provided by the gear tooth sensor; and attaching a battery to the pedal cycle and connecting the battery for powering the electric motor, the gear tooth sensor and the controller.
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Specification