A cushioned hook adapted to be mounted to the rear of a vehicle for providing a pulling connection with a trailing vehicle. The cushioned hook includes a lever member supported for pivotal movement and having an upper portion formed as a hook and a lower portion adapted to engage a resilient bumper when the hook is connected to the trailing vehicle.
The present invention provides a method of mounting a rearwardly extending push block unit and associated pulling hook on a vehicle in order to adapt it for push-pull operation, the vehicle including a rearwardly extending frame portion forming a verticle mounting plate, brackets being rigidly mounted upon the extended frame portion, the method comprising the steps of removing a normal push block assembly and radiator guards secured to the brackets, mounting an extended push block unit upon the vertical mounting plate and then securing a hook unit in releasable engagement with the brackets and in structural engagement with the extended push block unit in order to provide rigid structural support for the hook and extended push block unit while facilitating removal of the pulling hook and push block unit from the vehicle when desired.
A construction vehicle has a push-pull arrangement mounted on a forward end of the frame thereof. Such arrangement comprises a detachable bail pivotally mounted on the frame and adapted for engagement with a hook of another vehicle and a detachable push block assembly detachably mounted on the frame. A common bore is formed in the frame and push block assembly to mount a like-shaped annular member for transmitting shear loads imposed on the push block assembly to the frame directly.
A coupling hook for use in pulling vehicles. The coupling hook is formed with a single shank portion connected to the vehicle through tensile and compression supports for transmitting the pulling force coupled through the hook portion to the vehicle.
A push-pull coupling (18) for wheel supported power scrapers (10 and 14) has a coupling means (26) supported for cushioned fore-and-aft movement in a mounting frame (21) at the rear of a first power scraper (10) and a power operated bail (39) at the front of a second power scraper (14). The coupling means (26) has a rearwardly facing hook (37) against which a bight (39a) of the bail (39) may push, and a forwardly facing hook (38) against which the bight (39a) of the bail (39) may pull.
A coupling capable of selectively connecting and disconnecting tractor-scraper units so that they may operate either in push-pull tandem relation or individually. A first push block and pulling hook are arranged at the rear of the front tractor-scraper unit, whereas on the front of the rear unit there are arranged a second push block for contact with the first push block and a ball for engagement of the pulling hook. The second push block is pivotally supported at its top end, and the bail is pivotally connected to the bottom end of the second push block. Arranged between the bottom end of the second push block and the tractor framework of the rear unit are a pair of what are herein termed two-way shock-absorber assemblies which are dually effective to minimize the shocks caused upon contact between the first and second push blocks and upon engagement of the pulling hook by the bail.
