| 摘要 |
FIELD: shoe industry. SUBSTANCE: pneumatic springy boot has bottom part formed as all-metal springy base with hermetically sealed main cavity provided with air charging valve. Increased pressure auxiliary cavity is positioned within middle part of main cavity to double additional repulsive force. Auxiliary cavity is provided with back flap positioned adjacent to heel and locking flaps adjacent to metatarsus. Airduct for communicating heel cavity with metatarsus cavity is further provided with supporting flap, cover and pivotal pin. Under the action of heel air is urged from heel cavity into increased pressure cavity. During turning of foot air is delivered from metatarsus cavity by vacuum through opening of airduct into heel cavity. When foot is further turned, springs positioned under metatarsus are compressed under the action of weight of User. When metatarsus is moved to lower position, cover of airduct is closed by the action of upper base and increased pressure cavity valve is opened by pin and compressed air together with spring effectuate repulsion. EFFECT: increased efficiency, wider operational capabilities and enhanced reliability in operation. |
