초록 ▼

A lift/tilt-bed trailer. Apparatus is described for either raising from or lowering to the ground a trailer bed in a single step while maintaining a substantially horizontal attitude relative thereto, or for tilting the trailer bed which is normally positioned parallel to the ground when the trailer

A lift/tilt-bed trailer. Apparatus is described for either raising from or lowering to the ground a trailer bed in a single step while maintaining a substantially horizontal attitude relative thereto, or for tilting the trailer bed which is normally positioned parallel to the ground when the trailer is in its traveling mode for the purpose of loading or unloading the bed without substantial change in the orientation of the trailer “U”-frame in which the bed is located. Four pivotable tracks attached to the frame and corresponding roller wheels attached to the bed cooperate to achieve the desired motion. Since the trailer need not be detached from whatever device is used to move it about when it is to be loaded or unloaded, increased stability results with consequent reduction in risk to the operator.

대표청구항 ▼

A lift/tilt-bed trailer which comprises in combination: a. a first substantially rigid elongated frame member having a first end and a second end; b. a second substantially rigid elongated frame member rigidly attached to said first frame member substantially perpendiuclar thereto at the first end t

A lift/tilt-bed trailer which comprises in combination: a. a first substantially rigid elongated frame member having a first end and a second end; b. a second substantially rigid elongated frame member rigidly attached to said first frame member substantially perpendiuclar thereto at the first end thereof; c. a third substantially rigid elongated frame member rigidly attached to said first frame member in a direction substantally perpendicular thereto at the second end thereof and disposed in substantially the same direction as said second frame member, said third frame member being substantially parallel thereto, whereby a substantially planer, three-sided rectanguler “U”-frame is formed; d. a first wheel; e. a second wheel; f. means for rotatably attaching said first wheel to said second frame member such that said first wheel is located on the side of said second frame member away from said third frame member; g. means for rotatably attaching said second wheel to said third frame member in an opposing manner to said first wheel; h. a substantially planar rectangular bed adapted to fit substantially within said rectangular “U”-frame; i. bed positioning means for raising and lowering said substantially planer rectangular bed relative to said rectangular “U”-frame, said bed positioning means including: 1. a first track member pivotably attached to said second frame member on the side thereof facing said third frame member; 2. a second track member pivotably attached to said third frame member disposed in an opposing manner to said first track member; 3. a third track member pivotably attached to said second frame member on the side thereof facing said third member and at a position thereon further away from said first frame member than said first track member; 4. a fourth track member pivotably attached to said third frame member disposed in an opposing manner to said third track member; 5. first bed translating means adapted to move within said first track member and be guided thereby, said first bed translating means being fixed to the outside edge of said bed in the vicinity of said first track member facing said first track member; 6. second bed translating means adapted to move within said second track member and be guided thereby, said second bed translating means being fixed to the outside edge of said bed in the vicinity of said second track member facing said second track member; 7. third bed translating means adapted to move within said third track member and be guided thereby, said third bed translating means being fixed to the outside edge of said bed in the vicinity of said third track member facing said third track member; and 8. fourth bed translating means adapted to move within said fourth track member and be guided thereby, said fourth bed translating means being fixed to the outside edge of said bed in the vicinity of said fourth track member facing said fourth member; and j. means for imparting motion to said bed relative to said rectangular “U”-frame, whereby as said bed is moved toward said first frame member said bed is guided by said track members and said bed translating means to a position approximately level with said rectangular “U”-frame and approximately parallel thereto, said track members assuming a position substantially parallel to said rectangular “U”-frame, and whereby as said bed is moved away from said first frame member said bed is similarly guided to a position such that it is at rest on the surface upon which said first wheel and said second wheel are resting while said rectangular “U”-frame remains approximately parallel thereto, each of said track members having the end thereof away from said first frame member touching the surface and forming an angle with said rectangular “U”-frame as a result of having pivoted about said pivotable attachment therof.