Puma Se

Storck Bicycle Gmbh

Stephan Odenwald

Jens Buder

Ulrich Heinkel

Daniel Kriesten

Peter Wolf

Thorsten Sterzing

Thomas Milani

Ralph DÖRFLER

A power measuring system for an at least partially human powered vehicle or training device with a crank drive, in particular a bicycle, with at least one crank arm of the bicycle being manufactured of fiber-reinforced plastics and the crank arm having a sensor, in particular a strain gage, and with the largest part of the sensor being directly enclosed on all sides by the fiber-reinforced plastics. The force exerted on the respective pedal and from this the torque exerted on the bottom bracket shaft is determined by an electronics unit, which is preferably arranged in a cavity in the bottom bracket shaft, from the signal of sensor. From this, together with the rotational frequency of bottom bracket shaft, which is possibly measured by further sensors or is determined in a calculative way, the power currently generated by the user of the bicycle is determined. The power values can, in particular wirelessly, be sent to a display unit and be displayed thereby in the form of power-related information. The sensors in both crank arms, make it possible to determine the power for the left and the right leg of the cyclist separately.

Crank arm, crankset, and power measuring device for an at least partially human powered vehicle or training device with a crank drive

The invention relates to a shoe, especially to a sports shoe, comprising a shoe upper () and a sole (), wherein at least one actuator () is arranged in the sole (), by means of which a region of the contact surface () for the foot of the wearer of the shoe can be affected with regard to the geometry of the contact surface () at least in a defined length range (B) and/or width range (B) of the sole () relatively to the position of the contact surface () of the sole () on the ground. In order to make the required actuating motion of the actuator using little energy, the invention proposes that the actuator () comprises a support element () supporting the foot of the wearer, which is pivotally disposed relatively to a base part () around an axis (A), wherein at least one hydraulic chamber () having a variable volume is arranged on each side of the axis (A) between the support element () and the base part (), which are completely filled with a substantially incompressible medium, wherein the at least two hydraulic chambers () are fluidically connected to each other by means of a conduit () in which a switchable valve () is disposed.

Shoe, particularly sports shoe

Growing community of inventors

Chemnitz, Germany

Stephan Odenwald