Land vehicles – Wheeled – Articulated vehicle
Patent
1990-06-04
1991-05-07
Marmor, Charles A.
Land vehicles
Wheeled
Articulated vehicle
188112R, B60T 1308
Patent
active
050130595
ABSTRACT:
An actuator/coupler having concealed rollers between forward coupler attaching to the towing vehicle and rear housing connected to trailer. Forward rollers bear on the underside of the top wall of the rear housing. The rear rollers bear on the underside of the top wall of the coupler. A hydraulic cylinder block is counterbored and the rear rollers have annular extensions fitting into the counterbores for roller support during assembly. Rests are provided under front rollers for roller support during assembly. A piston rod in the hydraulic cylinder extending forwardly through a pivotal latching wall having a clutching opening normally only letting the piston rod move rearwardly and locking against forward movement and a spring pressing the latching wall to locking position. A cable to connect to the towing vehicle and reeved in said coupler to pull said piston rod rearwardly to apply hydraulic pressure to trailer brakes in case of trailer disconnect, braking being maintained by means of the latching wall, the latching wall being releasable by manual pressure acting against the force of the spring. A hydraulic reservoir above the hydraulic cylinder and a diaphragm top for the reservoir and a plate over the diaphragm. An opening in the plate and diaphragm for hydraulic fluid refilling. Overlying walls of housing and coupler having matching openings, the opening in the housing being circular and an operating disc rotating mounted therein, the opening in the coupler having a forward pointed v-shape, a latch pivotally mounted in the disc to engage the v-shape of the coupler opening when depressed so that the coupler and housing are restrained from telescoping to apply braking pressure when backing, the latch automatically releasing when the vehicle moves forwardly relative to the trailer.
REFERENCES:
patent: 2815778 (1957-12-01), Holman
patent: 3180455 (1965-04-01), De Puydr
patent: 3241639 (1966-03-01), De Puydt
patent: 3734540 (1973-05-01), Theirmann
patent: 4239252 (1980-12-01), Huetsch
Bowen Duane C.
Johnson Victor E.
Marmor Charles A.
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