A track apparatus of the type mountable on a rotatable axle of a vehicle is provided with a frame having excellent rigidity. The frame, which is preferably of unique uni-body construction, includes first and second portions that define a drive wheel receipt well therebetween for receiving the drive
A track apparatus of the type mountable on a rotatable axle of a vehicle is provided with a frame having excellent rigidity. The frame, which is preferably of unique uni-body construction, includes first and second portions that define a drive wheel receipt well therebetween for receiving the drive wheel of the track apparatus.
대표청구항▼
A track apparatus of the type mountable on a rotatable axle of a vehicle is provided with a frame having excellent rigidity. The frame, which is preferably of unique uni-body construction, includes first and second portions that define a drive wheel receipt well therebetween for receiving the drive
A track apparatus of the type mountable on a rotatable axle of a vehicle is provided with a frame having excellent rigidity. The frame, which is preferably of unique uni-body construction, includes first and second portions that define a drive wheel receipt well therebetween for receiving the drive wheel of the track apparatus. ate gear and the rack engaging with a large gear portion of the intermediate gear, whereby the rotational movement of the seat body is amplified by a ratio corresponding to a gear ratio of the large gear portion to the small gear portion and is transmitted to the longitudinal movement of the seat body. 4. The rotating vehicle seat as defined in claim 2, wherein the pinion gear has a no-teeth portion so as to provide a range in which the longitudinal movement is not coupled to the rotational movement of the seat body within the total range of the rotational movement of the seat body. 5. The rotating vehicle seat as defined in claim 4, further comprising a slide lock mechanism for locking the longitudinal movement of the seat body, the slide lock mechanism being constructed to be automatically released when the rotational movement and the longitudinal movement of the seat body are coupled to each other. 6. The rotating vehicle seat as defined in claim 1, wherein the coupling means comprises a link arm of which one end is rotatably connected to the underside of the seat body at a position off center of the rotation of the seat body and the other end is rotatably connected to the longitudinal support base, whereby the one end of the link arm moves around the other end of the link arm and in the longitudinal direction of the vehicle as the seat body rotates, so that the seat body is moved in the longitudinal direction of the vehicle. 7. The rotating vehicle seat as defined in claim 1, wherein the coupling means comprises a wire of which one end is secured to the underside of the seat body and the other end is secured to the longitudinal support base, whereby the seat body is moved in the longitudinal direction of the vehicle by winding the wire as the seat body rotates. 8. The rotating vehicle seat as defined in claim 1, further comprising a lateral support base for moving the seat body in a lateral direction of the vehicle, the lateral support base being constructed to move the seat body to a lower position as the seat body moves to the exterior in the lateral direction of the vehicle. 9. The rotating vehicle seat as defined in claim 8, further comprising a longitudinal restriction member for restricting the longitudinal movement of the seat body during the lateral movement of the seat body. 10. The rotating vehicle seat as defined in claim 9, wherein the longitudinal restriction member also has a function of restricting the lateral movement of the seat body in the seated position. 11. The rotating vehicle seat as defined in claim 3, wherein the pinion gear has a no-teeth portion so as to provide a range in which the longitudinal movement is not coupled to the rotational movement of the seat body within the total range of the rotational movement of the seat body. 12. The rotating vehicle seat as defined in claim 11, further comprising a slide lock mechanism for locking the longitudinal movement of the seat body, the slide lock mechanism being constructed to be automatically released when the rotational movement and the longitudinal movement of the seat body are coupled to each other. 13. An apparatus comprising: a seat body, a first support base supporting the seat body, the first support base capable of rotation, a second support base supporting the first support base, the second support base capable of moving the first support base in a longitudinal direction of a vehicle, and means for coupling the rotational movement and the longitudinal movement of the seat body, the coupling means having a portion with gear teeth and a portion without gear teeth. 14. An apparatus as defined in claim 13, wherein the coupling means comprises a pinion gear that rotates together with the seat body, and a rack mounted on the first support base along the longitudinal direction thereof for engaging with the pinion gear. 15. An apparatus as defined in claim 14, wherein the pinion gear has a no-teeth portion so as to provide a range in which the longitudinal movement is not coupled to the rotational movement of the seat body within the total range of the rotational movement of the seat body. 16. An apparatus as defined in claim 15, further comprising a slide lock mechanism for locking the longitudinal movement of the seat body, the slide lock mechanism being constructed to be automatically released when the rotational movement and the longitudinal movement of the seat body are coupled to each other. 17. An apparatus as defined in claim 13, wherein the coupling means comprises a pinion gear that rotates together with the seat body, an intermediate gear rotatably mounted on the first support base, and a rack mounted on the second support base along the longitudinal direction thereof, the pinion gear engaging with a small gear portion of the intermediate gear and the rack engaging with a large gear portion of the intermediate gear, whereby the rotational movement of the seat body is amplified by a ratio corresponding to a gear ratio of the large gear portion to the small gear portion and is transmitted to the longitudinal movement of the seat body. 18. An apparatus as defined in claim 17, wherein the pinion gear has a no-teeth portion so as to provide a range in which the longitudinal movement is not coupled to the rotational movement of the seat body within the total range of the rotational movement of the seat body. 19. An apparatus as defined in claim 18, further comprising a aide lock mechanism for locking the longitudinal movement of the seat body, the slide lock mechanism being constructed to be automatically released when the rotational movement and the longitudinal movement of the seat body are coupled to each other. 20. An apparatus as defined in claim 13, wherein the coupling means comprises a link arm of which one end is rotatably connected to the underside of the seat body at a position off center of the rotation of the seat body and the other end is rotatably connected to the second support base, whereby the one end of the link arm moves around the other end of the link arm and in the longitudinal direction of the vehicle as the seat body rotates, so that the seat body is moved in the longitudinal direction of the vehicle. 21. An apparatus as defined in claim 13, wherein the coupling means comprises a wire of which one end is secured to the underside of the seat body and thee other end is secured to the second support base, whereby the seat body is moved in the longitudinal direction of the vehicle by winding the wire as the seat body rotates. 22. An apparatus as defined in claim 13, further comprising a third support base capable of moving the seat body in a lateral direction of the vehicle, the third support base being capable of moving the seat body to a lower position as the seat body moves to the exterior in the lateral direction of the vehicle. 23. An apparatus as defined in claim 22, further comprising a longitudinal restriction member capable of restricting the longitudinal movement of the seat body during the lateral movement of the seat body. 24. An apparatus as defined in claim 23, wherein the longitudinal restriction member is also capable of restricting the lateral movement of the seat body in the seated position. 25. A method for rotating a vehicle seat body supported by a rotating support base about a pivotal axis from a sitting position, in which the vehicle seat faces a front direction of a vehicle, to an entry/exit position, in which the vehicle seat faces a door opening, comprising: rotating the vehicle seat body about the pivotal axis from the sitting position to an intermediate position without moving the vehicle seat body towards the front direction of the vehicle and simultaneously rotating the vehicle seat body about the pivotal axis and forwardly moving the vehicle seat body along a longitudinal support base towards the front direction of the vehicle from the intermediate position to the entry/exit position, wherein the forwa
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이 특허에 인용된 특허 (11)
Christianson Peter J. (R.R. #3 ; P.O. Box 135 Fargo ND 58104), Converter assembly for converting a drive-wheel tractor into a track-driven tractor.
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