Semi-trailer lifting and coupling gear for tractor vehicles
First Claim
1. Device for lifting the pole of a trailer of the semi-carried type and coupling same to a tractor vehicle, which comprises a supporting bracket secured beneath, and to the rear of said tractor, substantially in alignment with the longitudinal center line thereof, and further comprising a lever having a hook-shaped rear end adapted to engage the shackle of said trailer pole and a crosshead-shaped opposite end, said lever being pivoted to said supporting bracket about a horizontal axis, a hydraulic cylinder and piston unit mounted on the vehicle and connected to move the hook shaped rear end portion of the lever from a low position corresponding to the picking up of said shackle to a high coupling and hauling position in which said lever is locked against motion by a safety locking system, and a pivot pin for mounting said lever on said supporting bracket about said horizontal axis, said safety locking system including a visible element movable between one position to indicate a locked condition and another position to indicate an unlocked condition, said hydraulic cylinder and piston being adapted to pull said crosshead portion of said lever for lifting same being pivoted to said supporting bracket about an axis located upstream of the plane containing the axis of the rear axle of said tractor, said lever being adapted to be locked in relation to said bracket in the upper coupling position by means of said safety locking system including a latch bolt adapted to abut an inwardly contoured portion of said crosshead shaped opposite end.
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Accused Products
Abstract
This device for lifting the pole of a trailer of the semi-carried type and coupling same to a tractor vehicle comprises a supporting bracket secured beneath and at the rear of the tractor in alignment with the center line thereof, a lever having a hook portion adapted to pick up the shackle of the trailer pole and a crosshead-shaped opposite end, this lever being pivoted to said bracket about a horizontal axis in order to move said hook portion by means of a hydraulic actuator from a low, shackle picking-up position to a high coupling and hauling position in which said lever is locked by a safety system releasable by manual, electric or electromagnetic, or hydraulic means.
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Citations
20 Claims
- 1. Device for lifting the pole of a trailer of the semi-carried type and coupling same to a tractor vehicle, which comprises a supporting bracket secured beneath, and to the rear of said tractor, substantially in alignment with the longitudinal center line thereof, and further comprising a lever having a hook-shaped rear end adapted to engage the shackle of said trailer pole and a crosshead-shaped opposite end, said lever being pivoted to said supporting bracket about a horizontal axis, a hydraulic cylinder and piston unit mounted on the vehicle and connected to move the hook shaped rear end portion of the lever from a low position corresponding to the picking up of said shackle to a high coupling and hauling position in which said lever is locked against motion by a safety locking system, and a pivot pin for mounting said lever on said supporting bracket about said horizontal axis, said safety locking system including a visible element movable between one position to indicate a locked condition and another position to indicate an unlocked condition, said hydraulic cylinder and piston being adapted to pull said crosshead portion of said lever for lifting same being pivoted to said supporting bracket about an axis located upstream of the plane containing the axis of the rear axle of said tractor, said lever being adapted to be locked in relation to said bracket in the upper coupling position by means of said safety locking system including a latch bolt adapted to abut an inwardly contoured portion of said crosshead shaped opposite end.
- 11. In and for a vehicle a draw hook comprising a hooked lever terminating with the hook proper, means pivotally connecting the lever to a fixed part of the vehicle about a horizontal axis whereby the lever is displaceable in a vertical plane, a jack supplementary to the existing hydraulic system of the vehicle, and means connecting the jack to the lever whereby said lever is brought into the towing position, and means mounting said jack below said vehicle substantially on the longitudinal axis thereof, said fixed part of the vehicle comprising a chair formed by two flanges joined together by a rear cross-member, a front tie and the base by which the chair is fixed to the chassis of the vehicle, said base being situated to the rear of the horizontal axis, said flanges and said lever being each formed with a hole situated in the rear end of the flanges, the holes of the three elements being adapted to be traversed by a pin when they are aligned in the towing position.
Specification