초록 ▼

A description is given of a ski sledge having a swiveling front ski (1) with steering means (6), two essentially mutually parallel rear skis (2, 3) and a seat (4) connected via one or more rods (7) to the steering means, where the rear skis (2, 3) are connected to the sledge by means of a parallelog

A description is given of a ski sledge having a swiveling front ski (1) with steering means (6), two essentially mutually parallel rear skis (2, 3) and a seat (4) connected via one or more rods (7) to the steering means, where the rear skis (2, 3) are connected to the sledge by means of a parallelogram arrangement.

대표청구항 ▼

The invention claimed is: 1. A ski sledge comprising: a frame; a swiveling front ski mounted to the frame and having steering input, two essentially mutually parallel rear skis connected to the sledge frame with a parallelogram arrangement; and a seat connected along a longitudinal axis to the fram

The invention claimed is: 1. A ski sledge comprising: a frame; a swiveling front ski mounted to the frame and having steering input, two essentially mutually parallel rear skis connected to the sledge frame with a parallelogram arrangement; and a seat connected along a longitudinal axis to the frame, wherein the parallelogram arrangement is connected to the sledge frame approximately centrally of the length thereof, that the parallelogram arrangement is diagonal to a transverse plane that is at approximately right angles to the direction of motion, and that the parallelogram arrangement is combined with a damper device, which parallelogram arrangement includes a lower stay, an upper stay, two outer stays and a central stay pivotably connected to the frame, the lower part of each of the outer stays being connected to each of the skis and the upper part of each of the outer stays being connected to the upper stay, and the lower part of each of the outer stays being connected to the lower stay, that the approximately central part of the lower stay is connected to the lower part of the central stay and the approximately central part of the upper stay is connected to the upper part of the central stay, and that the approximately central part of the central stay is rotatably connected to the seat about a transverse axis perpendicular to the longitudinal axis by a substantially vertical stay. 2. A ski sledge in accordance with claim 1, wherein the outer stays and the central stay are rotatably connected to the lower stay by means of rotatable joints. 3. A ski sledge in accordance with claim 2, wherein the stay is rotatably connected to the central stay, and that the substantially vertical stay is provided with a damper device. 4. A ski sledge in accordance with claim 2, wherein the outer stays are rotatably connected to the upper stay by means of rotatable joints, and that the upper stay is rotatably connected to the central stay by means of a joint. 5. A ski sledge in accordance with claim 2, wherein the stays include a damper device. 6. A ski sledge in accordance with claim 2, wherein the skis are rotatable about an axis that is at approximately right angles to the direction of motion and are fixed against rotation about an axis that is approximately parallel with the direction of motion. 7. A ski sledge in accordance with claim 1, wherein the substantially vertical stay is rotatably connected to the central stay, the plane of rotation being along the longitudinal axis, and that the substantially vertical stay is provided with a damper device. 8. A ski sledge in accordance with claim 7, wherein the outer stays are rotatably connected to the upper stay by means of rotatable joints, and that the upper stay is rotatably connected to the central stay by means of a joint. 9. A ski sledge in accordance with claim 7, wherein the skis are rotatable about an axis that is at approximately right angles to the direction of motion and are fixed against rotation about an axis that is approximately parallel with the direction of motion. 10. A ski sledge in accordance with claim 1, wherein the outer stays are rotatably connected to the upper stay by means of rotatable joints, and that the upper stay is rotatably connected to the central stay by means of a joint. 11. A ski sledge in accordance with claim 10, wherein the stays include a damper device. 12. A ski sledge in accordance with claim 10, wherein the skis are rotatable about an axis that is at approximately right angles to the direction of motion and are fixed against rotation about an axis that is approximately parallel with the direction of motion. 13. A ski sledge in accordance with claim 1, wherein the stays include a damper device. 14. A ski sledge in accordance with claim 1, wherein the skis are rotatable about an axis that is at approximately right angles to the direction of motion and are fixed against rotation about an axis that is approximately parallel with the direction of motion. 15. A ski sledge comprising: a pair of spaced apart rear skis having a first end, a second end, and an attachment point therebetween; a steerable front ski assembly, having a first substantially horizontal stay and a second substantially horizontal stay vertically spaced apart from the first substantially horizontal stay, each substantially horizontal stay having a first end, a second end, and a longitudinal axis; a seat assembly having a seat, the seat including a forward end portion, a rearward portion, an attachment point therebetween, a connector, and a longitudinal axis, the first substantially horizontal stay being connected to the seat at the attachment point of the seat, the connector connected at one end to the forward end portion; a base comprising a pair of upper stays, a pair of lower stays, a pair of spaced apart outer stays, each having a first and second end, the base further comprising a central stay having a first end, a second end, and two attachment points therebetween, the pair of upper stays being pivotably connected at one end and pivotably connected to the first end of the central stay, the other end of the first upper stay being pivotably connected to the first end of the outer stay, the other end of the second upper stay being pivotably connected to the first end of the second outer stay, the second end of the first outer stay being pivotably connected to the first end of the first lower stay and the first rear ski at the attachment point of the first rear ski, the second end of the second outer stay pivotably connected to the first end of the second lower stay and the second rear ski at the attachment point of the second rear ski, the second end of the first lower stay being pivotably connected to the second end of the second lower stay and the second end of the central stay, a plane of motion of each pivotable connection of the base being transverse to the longitudinal axis of the seat assembly; and a substantially vertical stay having a first end and a second end, the first end of the substantially vertical stay being pivotably connected to the first substantially horizontal stay and the seat at the attachment point of the seat, the second end of the vertical stay being pivotably connected to the central stay at the first attachment point of the central stay, a plane of motion of each pivotable connection of the substantially vertical stay being along the longitudinal axis and transverse to the plane of motion of the pivotable connections of the base, the seat being pivotably connected to the second end of the second substantially horizontal stay and the second end of the central stay at a connector-second horizontal stay-central stay joint, a plane of motion of the connector-second horizontal stay-central stay joint being along the longitudinal axis wherein the ski sledge is capable of changing directions without changing direction of the steerable front ski assembly when a user transfers weight to urge the ski sledge in a desired direction when the ski sledge is moving forward and the user is sitting or standing on the ski sledge. 16. The ski sledge of claim 15, further comprising: a first foot rest connected to the first outer stay at an attachment point disposed between the first end of the first outer stay and the second end of the first outer stay, the first foot rest extending away from the center stay; and a second foot rest connected to the second outer stay at an attachment point disposed between the first end of the second outer stay and the second end of the second outer stay, the second foot rest extending away from the center stay, wherein the ski sledge is capable of turns without changing direction of the steerable front ski assembly when a user transfers weight when standing on the first and second foot rests to urge the ski sledge in the desired direction. 17. The ski sledge of claim 15, wherein the stays of the base, when pivotably connected, are connected with joints, wherein one or more joints include a spring. 18. A ski sledge comprising: a steerable front ski assembly, having a first substantially horizontal stay and a second substantially horizontal stay vertically spaced apart, each substantially horizontal stay having a first end, a second end, and a longitudinal axis; a seat assembly having a seat, the seat including a forward end portion, a rearward portion, an attachment point therebetween and a longitudinal axis substantially parallel to the longitudinal axis of the substantially horizontal stays, the first substantially horizontal stay being connected to the seat at the attachment point of the seat; a base comprising a pair of approximately planar four-bar linkage arrangements sharing a central stay fixed link and connected at a first intermediate point disposed between two ends on the central stay, the pair of four-bar linkage arrangements rotating in a plane transverse to the longitudinal axis of the first substantially horizontal stay, the first four bar linkage arrangement being connected to a first rearward ski, the second four bar arrangement being connected to a second rearward ski; and a planar three-bar linkage arrangement including the central stay, the seat, a connector link disposed between the forward end portion of the seat and the forwardmost end of the central stay, and a stay having two ends, the first end of the stay rotatably attached to the central stay at a second intermediate point disposed between the two ends and disposed rearward of the first intermediate point, the second end of the stay rotatably attached to the seat in the rearward portion of the seat, the three-bar linkage being connected to the second substantially horizontal stay and rotating in a plane parallel to the longitudinal axis of the second substantially horizontal stay. 19. The ski sledge of claim 18, wherein the first or second four-bar linkage arrangement or the three-bar linkage arrangement has two or more articulated joints. 20. The ski sledge of claim 18, wherein the three-bar linkage arrangement includes an additional degree of freedom from a spring.