IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0125607
(2002-04-19)
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발명자
/ 주소 |
- Bordeleau, Yvon
- Marcotte, Cé
- cile
- Maxwell, Larry
- Brisson, René
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
12 인용 특허 :
8 |
초록
▼
The trailer comprises a rectangular framework, a loading box fixedly mounted on the framework and including a horizontal platform, and a group of freely rotatable carrying wheels which allow the trailer to be pulled. The trailer is characterized in that two frames are disposed underneath the framewo
The trailer comprises a rectangular framework, a loading box fixedly mounted on the framework and including a horizontal platform, and a group of freely rotatable carrying wheels which allow the trailer to be pulled. The trailer is characterized in that two frames are disposed underneath the framework and are arranged to engage one frame into the other one between an expanded position of the trailer where the frames are drawn apart from one another and a retracted position where the frames are drawn in towards one another. The framework holds the frames with supports, that are arranged to permit a simultaneous transverse and longitudinal movement of the frames with respect to the framework when said frames are moved between an expanded position and a retracted position.
대표청구항
▼
1. A retractable and expandable trailer comprising a rectangular framework, a loading box fixedly mounted on said framework and including a horizontal platform, and a group of freely rotatable carrying wheels which allow said trailer to be pulled, characterized in that there are provided two frames
1. A retractable and expandable trailer comprising a rectangular framework, a loading box fixedly mounted on said framework and including a horizontal platform, and a group of freely rotatable carrying wheels which allow said trailer to be pulled, characterized in that there are provided two frames disposed underneath the framework and arranged to engage one frame into the other one between an expanded position of said trailer where said frames are drawn apart from one another and a retracted position of said trailer where said frames are drawn in towards one another, supports fixedly mounted on said framework, said framework holding said frames with said supports, said supports being arranged to permit a simultaneous transverse and longitudinal movement of said frames with respect to said framework when said frames are moved between said expanded position and said retracted position, said carrying wheels being respectively fixed to the two frames, and an articulation device which allows said frames to move by transverse and longitudinal sliding in said supports between said expanded position and said retracted position and vice versa, and longitudinal members adapted to be juxtaposed relative to said horizontal platform on both sides of said platform in said expanded position of said trailer. 2. A trailer according to claim 1, characterized in that said frames each include a base and two legs perpendicular to said base, said legs being each introduced in said supports in which they can be subjected to said transverse and longitudinal movement, vertical lateral panels each rising from a base of a corresponding frame and fixed to said base in order to define the two sides of the loading box.3. A trailer according to claim 2 characterized in that the trailer comprises a front panel rising from the front end of said rectangular framework, to join said vertical lateral panels and thereby constitute said loading box.4. A trailer according to claim 3 characterized in that said rectangular framework includes lateral sides, a rear side and a front side as well as a central link, fixed between the rear and front sides, said longitudinal members are each mounted in order to pivot along said lateral sides of said rectangular framework to adopt either a vertical position in said retracted position of said trailer where said longitudinal members and said panels are placed against one another, or a horizontal position in said expanded position of said trailer, said longitudinal members then constituting an extension of said platform.5. A trailer according to claim 4, characterized in that each longitudinal member comprises a secondary panel perpendicularly fixed at one end of said longitudinal member to constitute an extension of the front panel in said expanded position of said trailer, when said longitudinal member is in a horizontal position, and when said longitudinal member is in a vertical position in said refracted position of said trailer, said secondary panel is placed outside said front panel and against said front panel, while each said lateral panel rests on a corresponding longitudinal member, said longitudinal member then being in a vertical position.6. A trailer according to claim 2, characterized in that the articulation device comprises a pivoting rod, that is articulated at one end along a leg of a frame and at the other end, along a corresponding leg of the other frame, said pivoting rod being pivotafly mounted on said framework, and means enabling to cause a 180° rotation of said rod and to cause a retraction or expansion of said frames between said retracted and expanded positions, by articulation of said pivoting rod with respect to the two legs on which the frame is articulated.7. A trailer according to claim 6, characterized in that the articulation device comprises two pivoting rods, so that each leg of one frame is connected to a corresponding leg of the other frame.8. A trailer according to claim 7, characterized in that said trailer comprises a pivot pulley fixedly mounted to each pivoting rod, at a location where said pivoting rods pivots on said framework, driving means provided for rotation of the two pulleys and thus causing a 180° rotation of each articulated rod, and consequently, extension or retraction of the two frames.9. A trailer according to claim 8, characterized in that each pivoting rod is pivotally mounted on a central link of said framework.10. A trailer according to claim 8, characterized in that said trailer comprises a drawbar that is fixedly mounted on said framework, a transmission box mounted on said drawbar, said transmission box being operatively connected to each articulated rod by means of said pivot pulleys.11. A trailer according to claim 10, characterized in that said transmission box includes a diving pulley as well as a crank in order to rotate the driving pulley.12. A trailer according to claim 11, characterized in that said pivot pulleys and said trailing pulley comprise sheave wheels.13. A trailer according to claim 12, characterized in that said driving pulley and said pivot pulley are functionally connected to one another by means of a system of straps.14. A trailer according to claim 1, characterized in that said trailer comprises one said support for each leg of the two frames, said supports being shaped to define a rectangular opening capable of receiving one said leg and enabling a transverse and longitudinal sliding of said legs in said supports.
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