A pin binding toe unit for holding a footwear toe to a snow travel aid has a pair of pivotal jaws with respective teeth for engaging concavities in sides of the footwear toe, and a biasing element operable to bias the jaws into open and closed positions. In contrast to conventional incorporation of multiple biasing elements into the jaws, the biasing element is instead uniquely housed in the mode lever by which the jaws are openable and closeable, and in this housed relation to the mode lever, the biasing element is constrained to a uniform horizontal orientation through the full range of jaw motion. The assembly is simplified, torque leverage on the jaws is advantageously varied within the range of the jaw motion for improved energy absorption, and the trigger of the mode lever is uniquely widened for easier user step-in. Threaded pivots enable disassembly of components for service and end-of-life recycling, with the two threaded jaw pivots being characterized by opposing thread directionality or opposing insertion orientation for self-prevented loosening of the threaded jaw pivots over repeated open-close cycles.

A ski includes an elongated ski body having a bottom layer defining a bottom surface of the ski, a top layer defining a top surface of the ski, and a middle layer disposed between the bottom layer and the top layer, in which the middle layer includes a negative Poisson's ratio (NPR) foam material having a Poisson's ratio of between 0 and ?1.

A ski includes an elongated ski body having a bottom layer defining a bottom surface of the ski, a top layer defining a top surface of the ski, and a middle layer disposed between the bottom layer and the top layer, in which the middle layer includes a negative Poisson's ratio (NPR) foam material having a Poisson's ratio of between 0 and ?1.

The toe-piece of a ski mountaineering binding comprises: a first jaw and a second jaw rotatably coupled with a base fixable to a ski; a first hooking element borne by the first jaw and having a first tip for inserting in a first lateral hole of a ski boot and a second hooking element borne by the second jaw and having a second tip for inserting in a second lateral hole of the ski boot when the toe-piece assumes a configuration of an inserted ski boot. The toe-piece is configured so that the first hooking element is inserted in a first seat in the first jaw to enable a roto-translatory motion between a retracted position when the boot is aligned to the longitudinal axis of the ski, and a plurality of possible advanced positions when the ski boot temporarily misaligns with respect to the longitudinal axis of the ski.

The present invention concerns a system for optional dynamic positioning of a ski binding (2) or parts of this, on or in a ski during use. The invention is characterized in that the system comprises an electrical actuator (6), an energy source (7) in order to run the electrical actuator, in addition to a control system (8) adapted to control the electrical actuator.

Some aspects include a ski binding system using controllable electromagnets, alone or in combination with permanent magnets, as means of attaching or releasing a ski boot to a ski during use. Some aspects include a ski binding system using a controllable solenoid. In some aspects, microprocessor-based control releases binding electronically based on input from sensors located in binding, ski and/or boot, as well as in other equipment or clothing connected to them or to skier, or binding releases when a mechanical threshold is overcome. In some aspects, sensor data are recorded for analysis of system performance and for adjustment and improvement of system parameters based on data analytics.

A binding for a touring ski, a Telemark ski or a cross-country ski having step in automatic locking. The binding includes a front retaining element to cooperate with the front sole of a boot, a rear retaining element to cooperate with the rear part of the front sole and/or the rear sole of the boot, a tensioning element to tension the boot on the binding and to enable the heel to be freely lifted, a tensioning link placed under and connected to a rear retaining stirrup, and a fixed or retraction stop to cooperate with the tensioning link so as to enable the rear retaining stirrup to move back, tensioning the tensioning element, when the heel of the boot exerts a downwardly directed pressure on the rear retaining boot situated in an idle position.

A binding for a touring ski, a Telemark ski or a cross-country ski having step in automatic locking. The binding includes a front retaining element to cooperate with the front sole of a boot, a rear retaining element to cooperate with the rear part of the front sole and/or the rear sole of the boot, a tensioning element to tension the boot on the binding and to enable the heel to be freely lifted, a tensioning link placed under and connected to a rear retaining stirrup, and a fixed or retraction stop to cooperate with the tensioning link so as to enable the rear retaining stirrup to move back, tensioning the tensioning element, when the heel of the boot exerts a downwardly directed pressure on the rear retaining boot situated in an idle position.

boot on a sliding board, having a base (130; 3) intended to be fixed to the sliding board,

two lateral jaws (101; 8, 9), each mounted to be rotationally mobile on the base (130; 3) about a substantially vertical rotation axis (103; 10, 11), so as to occupy a closed position to hold a boot and a separated position to release or receive a boot,

and a pusher (110; 35) having two lateral trig surfaces (114; 24, 25) each cooperating with a respective ramp (104; 22, 23) of each jaw (101; 8, 9), this pusher (110; 35) being linked to the base (130; 3) by a trig spring (112; 36)

and two links (120; 28, 29) each linked to a jaw (101) by a first lateral axis (123; 14, 15) and linked together by at least one central axis (125; 32).

The invention relates to a heel-piece for binding a boot on a gliding board that includes a frame including a vertical extension; a body rotatably mounted about the extension; at least two rods supported by the body, extending on respective sides of the vertical extension, the two rods each having a free end to cooperate with a housing in the heel of the boot; and a holding mechanism for maintaining a spacing between the free ends of the rods. The vertical extension supports at least one contact zone fixed in relation to the frame. Each rod cooperates with a respective portion of the contact zone, specific to each rod. The contact zone is arranged such that a rotation of the body about the extension, from a descent configuration, causes an increased spacing between the two rods. The invention also relates to a binding system and a gliding board equipped with such a binding.