Motor vehicles – With powered – ground-engaging means for producing – or...
Patent
1988-10-06
1990-09-11
Marmor, Charles A.
Motor vehicles
With powered, ground-engaging means for producing, or...
2807631, 254122, B60S 900
Patent
active
049554506
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a lifting equipment with mechanical, pneumatic, hydraulic or electrical drive for four-wheeled motor vehicles.
The inadequate mobility of passenger motor vehicles when moving into and out of parking places, in emergency situations and accidents as well as in the case of the daily traffic jams on all highways is sufficiently well known. A change in the direction of travel or the moving into and out of parking places in vehicle queues frequently require repeated shunting with the danger of a collision with other vehicles. The cause of this is substantially the large turning circles of the passenger motor vehicles, which does not permit a turning in the smallest space.
In the GB-A No. 380048 (Evans), there is described a lifting equipment which is firmly mounted at the vehicle base and which on corresponding arrangement lifts either the front wheels or the rear wheels of the vehicle, wherein a small roller loaded by the vehicle weight bears against the roadway and shall at the same time serve as transverse drive. Apart from the expensive mechanism with manual operation, it can be stated that it is almost impossible to move a vehicle weighing several tons, for example on a cobble-stone surface, by means of a roller and to turn the vehicle about the front and rear axle. It must furthermore be regarded as impossible to pivot the vehicle about the vertical axis on the spot when one wheel pair each time still has adhesion with the roadway. Already by reason of the fact that the vehicle is for example raised by both front wheels off from the roadway, it can be stated that a pivotation of the vehicle about a vertical axis is neither intended nor performable. The printed specification also contains no statements about whether the vehicle shall or can be pivoted with the own travel drive.
SUMMARY OF THE INVENTION
The invention is therefore based on the task of creating an equipment which eliminates the mentioned defects and increases the mobility of passenger motor vehicles in the narrowest space. Furthermore, the equipment shall be uncomplicated also for the layman and operationally reliable for the driver and the equipment shall finally be installed cheaply in new and second-hand vehicles.
For the solution of the problem, the invention starts out from a lifting equipment for the turning on the spot of a four-wheeled motor vehicle with front-wheel or four-wheel drive, wherein the lifting equipment is provided with mechanical, pneumatic, hydraulic or electrical drive and firmly mounted at the lower load-supporting base or frame of the vehicle and on actuation bears against the roadway in such a manner that two or three vehicle wheels are each time lifted off from the roadway by a supporting moment. The invention consists in that the supporting moment of the lifting equipment engages in such a manner off the centre of gravity and longitudinally centrally of the vehicle that the two rear wheels are raised off from the roadway and both the front drive wheels are partially relieved in such a manner that the lifting equipment is loaded by 60% to 80% of the vehicle weight and the partially relieved front wheels are loaded by the remaining load.
In refinement of the invention, the lock of the front differential gear is switchable on and off directly or indirectly automatically by the lifting equipment mechanically, pneumatically, hydraulically or electromechanically.
Preferably, the lifting equipment consists of two transverse carriers, which are fastened at the base of the vehicle and each consist of a laterally open right-angled profile and two scissors arm pairs, which are each borne at their outer ends to be rollable within the transverse carriers by rotatable rollers and to be pivotable at the rollers, whilst the inner ends of the scissors arm pairs, which together point towards the centre, are pivotably borne at a bottom plate to be placed on the base.
In further refinement of the invention, the lifting equipment in the extended state is supported against the vehic
REFERENCES:
patent: 2937852 (1960-05-01), Clarke
patent: 3246709 (1966-04-01), Lossev
patent: 3997143 (1976-12-01), Rose
Deinlein-Kalb Hans
Festl Monika
Johnson Victor E.
Marmor Charles A.
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