A shock absorbing device having at least one nautilus spring disposed between two members is described. When the members move toward each other, the one or more nautilus coil springs are canted and compressed. The shock absorbing device takes advantage of the unique force-displacement curve of canted springs and reduces bounce back.

A shock absorbing device having at least one nautilus spring disposed between two members is described. When the members move toward each other, the one or more nautilus coil springs are canted and compressed. The shock absorbing device takes advantage of the unique force-displacement curve of canted springs and reduces bounce back.

A modular article of footwear has a shock absorbing insert placed between the insole and the outsole thereof, for example at the heel. The insert includes a spring carrier having upper and lower portions, each having a plurality seats for receiving a respective ends of respective coil springs. Each of the springs extends between said upper and lower portions and is captured therebetween. A pair of opposed permanent magnets generates a separating force which supplements the supporting force of the mechanical springs. The insert may also contain a device for converting mechanical energy to electrical energy.

A modular article of footwear has a shock absorbing insert placed between the insole and the outsole thereof, for example at the heel. The insert includes a spring carrier having upper and lower portions, each having a plurality seats for receiving a respective ends of respective coil springs. Each of the springs extends between said upper and lower portions and is captured therebetween. A pair of opposed permanent magnets generates a separating force which supplements the supporting force of the mechanical springs. The insert may also contain a device for converting mechanical energy to electrical energy.

A heel structure with an adjustable height includes a support rod, adjustment rod, and retractable element. The support rod is penetrated by a through hole. Tracks and engaging grooves are disposed on the wall of the through hole. The engaging grooves are in communication with the tracks and run horizontally. The adjustment rod penetrates the through hole and undergoes displacement. Resilient engaging bumps are disposed above the adjustment rod and thus resiliently pressed within the tracks. The tracks abut against the engaging bumps such that the engaging bumps retract. The retractable element is rotated such that circular pipes of different diameters decreasing downward and stepwise are fitted together so as to be folded and unfolded. A hollow-core mounting region is defined centrally at the circular pipes. A fitting hole is disposed at the lowest circular pipe and fixedly disposed on an outer wall of the bottom of the adjustment rod.

A heel structure with an adjustable height includes a support rod, adjustment rod, and retractable element. The support rod is penetrated by a through hole. Tracks and engaging grooves are disposed on the wall of the through hole. The engaging grooves are in communication with the tracks and run horizontally. The adjustment rod penetrates the through hole and undergoes displacement. Resilient engaging bumps are disposed above the adjustment rod and thus resiliently pressed within the tracks. The tracks abut against the engaging bumps such that the engaging bumps retract. The retractable element is rotated such that circular pipes of different diameters decreasing downward and stepwise are fitted together so as to be folded and unfolded. A hollow-core mounting region is defined centrally at the circular pipes. A fitting hole is disposed at the lowest circular pipe and fixedly disposed on an outer wall of the bottom of the adjustment rod.

A shock absorbing device having at least one nautilus spring disposed between two members is described. When the members move toward each other, the one or more nautilus coil springs are canted and compressed. The shock absorbing device takes advantage of the unique force-displacement curve of canted springs and reduces bounce back.

A shock absorbing device having at least one nautilus spring disposed between two members is described. When the members move toward each other, the one or more nautilus coil springs are canted and compressed. The shock absorbing device takes advantage of the unique force-displacement curve of canted springs and reduces bounce back.

A shoe configured to adjust from a first configuration having a first height to a second configuration having a second height includes a sole. Sole includes a toebox, a shank, and a seat. The shank is rotatably connected to the toebox and the seat. The shoe also includes a heel assembly mounted to the seat. The heel assembly includes a collapsible exterior shell that adjusts the shoe between the first configuration and the second configuration, the first height of the first configuration being greater than the second height of the second configuration.

A shoe configured to adjust from a first configuration having a first height to a second configuration having a second height includes a sole. Sole includes a toebox, a shank, and a seat. The shank is rotatably connected to the toebox and the seat. The shoe also includes a heel assembly mounted to the seat. The heel assembly includes a collapsible exterior shell that adjusts the shoe between the first configuration and the second configuration, the first height of the first configuration being greater than the second height of the second configuration.