US 4,955,754 A · Shock absorbing device for a paving machine

Abstract

The invention is a device for cushioning the contact between a paving machine equipped with a hopper for receiving paving material and a truck carrying paving material to be dumped into the hopper. In one embodiment the device has an arm with one end pivotally connected to the paving machine; the other endDoffth ajm Beajs ollerRfoo clnttcttnggthh ttrex oo tte ruwk..Thh ajm s coonegtee t tte issonnoffa yddauuicccyyinnerrsyten; as the roller contacts the truck tires, the fluid of the hydraulic system cushions the contact between the roller and the tires. The hydraulic system includes a pump for returing the piston (and thus the roller) to an extended position and an adjustable pressure hydraulic valve, controllable by the operator of the paving machine, for modulating the force exerted on the paving machine and on the tires while the roller is in contact with the tires. The device may also be equipped with a latch, releasable by the operator of the paving machine, for holding the piston (and thus the roller) in a retracted position to reduce the tendency of the truck tires to bounce ahead of the paver.

Claims24

Dependent claims

A device for cushioning a contact between a travelling self-propelled paving machine equipped with a hopper for receiving paving material and a truck carrying paving material to be deposited in the hopper, the truck being equipped with a tire, the device comprising:

A. contacting means, connected to the paving machine, for contacting the truck and for applying to the truck a force tending to move the truck in a direction in which the paving machine is travelling, the contacting means movable between an extended position for initially contacting the truck and a retracted position;
B. cushioning means, connected to the contacting means and to the paving machine, for cushioning the force applied to the truck and the force applied to the paving machine by the contact between the contacting means and the truck;
C. latch means, connected to one of the paving machine and the contacting means, for latching the contacting means in the retracted position, the latch means having a latched state and an unlatched state;
and D. restoring means, connected to the contacting means and to the paving machine, for restoring the contacting means to the extended position.

1 more element

A. contacting means, connected to the paving machine, for contacting the truck and for applying to the truck a force tending to move the truck in the direction in which the paving machine is travelling, the contacting means movable between an extended position for initially contacting the truck and a retracted position;
B. cushioning means, connected to the contacting means and to the paving machine, for cushioning the force applied to the truck and the force transmitted to the paving machine by the contact between the contacting means and the truck;
C. force modulating means, connected to the cushioning means and to the paving machine, for modulating the force applied to the truck and the force applied to the paving machine by the contact between the contacting means and the truck;
and
D. restoring means, connected to the contacting means and to the paving machine, for restoring the contacting means to the extended position.

2 more elements

Dependencies are inferred from the claim text.

Shock absorbing device for a paving machine

Life of this patent

Shock absorbing device for a paving machine

Life of this patent

Abstract

Claims24