Shock device in particular for bicycles

A shock device for an at least partially muscle-powered two-wheeled vehicle, the shock device comprising:

• at least one tube system having two telescopic tubes, the tube system extending from a first end to a second end;
• and
• a suspension system which is effective between the first end and the second end and biases the two tubes to an extended position;
• wherein the suspension system comprises a positive air spring and an independent, series-connected supplementary spring, and wherein both the positive air spring and the supplementary spring bias the tube system to the extended position;
• and
• the supplementary spring shows a lower breakaway force than does the positive air spring and that the ratio of the suspension travel of the positive air spring to the suspension travel of the supplementary spring is higher than 4:1,
• wherein the ratio of the spring force of the supplementary spring to the spring force of the positive air spring in the case of a maximum stroke length of the supplementary spring is lower than 20:10 and higher than 1:10.

A shock device for an at least partially muscle-powered two-wheeled vehicle, the shock device comprising:

• at least one tube system having two telescopic tubes, the tube system extending from a first end to a second end;
• and
• a suspension system is provided which is effective between the first end and the second end and biases the two tubes to an extended position,
• wherein the suspension system comprises a positive air spring and an independent, series-connected supplementary spring, and wherein both the positive air spring and the supplementary spring bias the tube system to the extended position;
• and
• the supplementary spring shows a lower breakaway force than does the positive air spring and that the ratio of the suspension travel of the positive air spring to the suspension travel of the supplementary spring is higher than 4:1,
• wherein the ratio of the spring force of the supplementary spring to the spring force of the positive air spring in an extended position or a sag position is lower than 4:1 and higher than 1.4.

A shock device for an at least partially muscle-powered two-wheeled vehicle, the shock device comprising:

• at least one tube system having two telescopic tubes, the tube system extending from a first end to a second end;
• and
• a suspension system which is effective between the first end and the second end and biases the two tubes to an extended position,
• wherein the suspension system comprises a positive air spring and an independent, series-connected supplementary spring, and wherein both the positive air spring and the supplementary spring bias the tube system to the extended position,
• wherein the positive air spring comprises a positive chamber in a first tube of the two tubes, the positive chamber being enclosed by a moving piston connected with a piston rod and wherein the piston rod is coupled with a second tube of the two tubes,
• wherein a negative spring is configured in the first tube and comprises a negative chamber and exerts a force counteracting the positive air spring, wherein the negative spring is configured as an air spring and wherein the moving piston variably divides the volume in the first tube into a negative volume of the negative spring and a positive volume of the positive spring;
• and
• the supplementary spring shows a lower breakaway force than does the positive air spring and the ratio of the suspension travel of the positive air spring to the suspension travel of the supplementary spring is higher than 4:1,
• wherein the ratio of a stroke length of the positive air spring to a suspension travel of the supplementary spring is higher than the ratio of the volume of the positive chamber to the volume of the negative chamber in the extended position.

A shock device for an at least partially muscle-powered two-wheeled vehicle, the shock device comprising:

• at least one tube system having two telescopic tubes, the tube system extending from a first end to a second end;
• a suspension system which is effective between the first end and the second end and biases the two tubes to an extended position;
• wherein the suspension system comprises a positive air spring and an independent, series-connected supplementary spring, and wherein both the positive air spring and the supplementary spring bias the tube system to the extended position,
• wherein the positive air spring comprises a positive chamber in a first tube of the two tubes, the positive chamber being enclosed by a moving piston connected with a piston rod and wherein the piston rod is coupled with a second tube of the two tubes,
• wherein a negative spring is configured in the first tube and comprises a negative chamber and exerts a force counteracting the positive air spring, wherein the negative spring is configured as an air spring and wherein the moving piston variably divides the volume in the first tube into a negative volume of the negative spring and a positive volume of the positive spring;
• and
• the supplementary spring shows a lower breakaway force than does the positive air spring and the ratio of the suspension travel of the positive air spring to the suspension travel of the supplementary spring is higher than 4:1,
• wherein the ratio of the volume of the positive chamber to the volume of the negative chamber in the extended position is higher than 1.5.

A shock device for an at least partially muscle-powered two-wheeled vehicle, the shock device comprising:

• at least one tube system having two telescopic tubes, the tube system extending from a first end to a second end;
• a suspension system which is effective between the first end and the second end and biases the two tubes to an extended position;
• wherein the suspension system comprises a positive air spring and an independent, series-connected supplementary spring, and wherein both the positive air spring and the supplementary spring bias the tube system to the extended position,
• wherein the positive air spring comprises a positive chamber in a first tube of the two tubes, the positive chamber being enclosed by a moving piston connected with a piston rod and wherein the piston rod is coupled with a second tube of the two tubes,
• wherein a negative spring is configured in the first tube and exerts a force counteracting the positive air spring, wherein the negative spring is configured as an air spring and wherein the moving piston variably divides the volume in the first tube into a negative volume of the negative spring and a positive volume of the positive spring, and
• the supplementary spring shows a lower breakaway force than does the positive air spring and the ratio of the suspension travel of the positive air spring to the suspension travel of the supplementary spring is higher than 4:1,
• wherein a bypass is provided which ensures pressure compensation between the positive air spring and the negative spring in a predetermined piston position.