Motor vehicles – Surface effect vehicles – Dynamic seal or fluid curtain
Patent
1983-09-26
1985-11-12
Peters, Jr., Joseph F.
Motor vehicles
Surface effect vehicles
Dynamic seal or fluid curtain
37126R, 172783, 172799, 280 6H, 280492, 280754, B62D 510, B60G 2500
Patent
active
045522383
ABSTRACT:
A tractor scraper hitch steering and suspension system wherein a tractor drive wheel axle frame is pivotally connected to a tractor main frame to permit vertical movement of the tractor drive wheels relative to the tractor. Two hydraulic cylinders are pivotally connected between the tractor drive wheel axle frame and a cross arm forming a part of a hitch assembly that secures the tractor to the scraper. The hydraulic cylinders dampen vertical bounce movement that occurs during operation and control tilting or rolling motion between the tractor portion and the scraper portion that occur about their common longitudinally extending axis. A locking brake is provided to resist vertical motion of the tractor drive wheel axle frame to stabilize the depth of a cutting edge of the scraper during operation and obtain a steady depth of cut. A pressurized hydraulic system including an accumulator, a source of fluid pressure, fluid control valves, restrictor orifices and a sensor system are effective to maintain a range of predetermined vertical positions of portions of the articulately connected vehicle regardless of the weight of the load being received, carried by, or discharged from the scraper bowl to thereby control riding characteristics when encountering bounce, pitch or rolling conditions.
REFERENCES:
patent: 3032135 (1962-05-01), McAdams
patent: 3314496 (1967-04-01), Thassy
patent: 3672460 (1972-06-01), Takata
patent: 3953040 (1976-04-01), Unruh et al.
patent: 4279312 (1981-07-01), Pyle
patent: 4279319 (1981-07-01), Joyce, Jr.
Brown Robert A.
FiatAllis North America, Inc.
Peters Jr. Joseph F.
Watts Charles R.
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