US 4,359,235 AGranted

Ski brake

AssigneeTMC Corporation

InventorHeinz Wittmann

Life of this patent

Estimating the term…

Loading patent…

Abstract

A ski brake having a ski mountable base plate and having a pair of braking arms, each braking arm having a disk-shaped head at one end and being supported intermediate its ends on the base plate for limited pivotal and axial movement about an axis normal to the arm and transverse of the ski. A bearing bar is pivotally supported in the base plate about the axis, and a pedal is pivotally supported on the bearing bar at a location remote from the axis. A receiving recess is provided in each lateral side of the pedal and defines a guide surface which forms an acute angle with the ski surface when the ski brake is fully retracted. Each disk-shaped head is supported for pivotal movement about its axis on a respective guide surface with a side thereof disposed against and parallel to the guide surface. The undersurface of the pedal includes a flattened surface extending forwardly from beneath the pivot axis and upwardly at an acute angle to the rest of the undersurface. The pivotal movement of the pedal on the bearing bar as the ski brake is pivoted to a retracted position acts on the disk-shaped heads through the guide surfaces to pull the braking arms laterally inwardly to a position above and parallel to the ski.

Claims18

Dependent claims

In a ski brake having a base plate, a pedal and two braking mandrels which project, in a braking position, next to the two ski edges below the running surface of the ski and which are each the free end of a respective, pivotally supported braking arm, first swivel axes of said braking arms each extending transversely with respect to the ski and being inclined in relationship thereto, said braking arms being movably supported on guide surfaces which extend normal to the respective first swivel axes and being pivotal about second swivel axes against the urging of an erecting spring from the braking position into a fully retracted position in which the two braking arms are held approximately parallel with respect to the upper side of the ski and at least partially above the same, the improvement comprising wherein each said braking arm has a head;

wherein said guide surface for each individual braking arm is defined by a receiving recess constructed in a frame of said pedal and in the fully retracted position forms an acute angle with respect to the upper side of the ski, in which receiving recesses said heads of said individual braking arms are supported on said guide surfaces, said braking arms each being pivotal about a said first axis which is normal to said guide surface in the associated receiving recess of said pedal;
wherein each of said braking arms has a nipple which is supported in a respective holding opening provided in said base plate and, in relationship to the longitudinal axis of the ski, is movable transversely back and forth;
wherein in alignment with said two holding openings in said base plate there are provided bearing openings in bearing plates of said base plate, each said bearing opening receiving a respective bearing pin of an approximately omega-shaped bearing bar, said bearing bar including a support part at a location remote from said two bearing pins, said support part including support legs and portions of said support legs, at least in the fully retracted position, being received in a groove in said pedal, and said pedal being movably supported on a portion of said support part;
and wherein said pedal has on an end thereof which is remote from said second swivel axes a flattened surface which extends at an acute angle with respect to the plane of the undersurface of said pedal.

1 more element

In a ski brake having at least two braking mandrels which project, in a braking position, next to the two ski edges below the running surface of the ski, which braking mandrels are the free ends of respective, pivotally supported braking arms, first swivel axes of said braking arms each extending transversely with respect to the upper side of the ski and being inclined with respect to the upper side of the ski, said braking arms being movably supported on guide surfaces which extend normal to the respective first swivel axes and define, together with an operating pedal, a braking mechanism which, in relationship to a ski-fixed base plate, can be swung about a second swivel axis against the urging of an erecting spring from the braking position into a fully retracted position, in which latter position the two braking arms are held approximately parallel with respect to the upper side of the ski and at least partially above the same, the improvement comprising wherein each said braking arm has a head;

wherein said guide surfaces for said respective braking arms are constructed as sloped surfaces partially defining receiving recesses in said pedal and which, in the fully retracted position of the ski brake, extend at an acute angle with respect to the upper side of the ski;
wherein the receiving recesses are arranged in a frame of the pedal and symmetrically with respect to the longitudinal axis of the same, in which receiving recesses said heads of said individual braking arms are supported against respective said guide surfaces, said braking arms each being pivotal about a respective said first swivel axis which is positioned normal to said associated guide surface;
wherein each of said braking arms has a nipple which is supported in a respective holding opening provided in said base plate and is reciprocally movable in the holding opening transversely of the longitudinal axis of the ski;
wherein in the base plate in alignment with said two holding openings there are provided bearing openings, each said bearing opening receiving a respective bearing pin of an approximately omega-shaped bearing bar, which bearing pins form said second swivel axis of said braking mechanism;
wherein the portion of said bearing bar which is remote from said two bearing pins includes a support section having support legs, portions of said support legs, at least in the fully retracted position of the braking mechanism, being received in a receiving groove of said pedal, and said pedal being movably supported on a portion of said support part;
and wherein the underside of said pedal has on its end which is remote from said second swivel axis a flattened surface which extends at an acute angle with respect to the remainder of the underside of said pedal.

3 more elements

Dependencies are inferred from the claim text.