Land vehicles – Step or abutment ascending type vehicle – With skid or rollerway
Patent
1984-08-21
1987-03-17
Love, John J.
Land vehicles
Step or abutment ascending type vehicle
With skid or rollerway
180 82, 188 42, 188174, 188176, 280 4729, B62B 122, B62B 502
Patent
active
046501975
DESCRIPTION:
BRIEF SUMMARY
This invention has been primarily devised for the lifting and transporting of television receivers but as will be clear from the following description the trolley can be used for other equipment.
Television receivers have special features making it diffucult for a single person to handle the larger screened models. The larger television receivers are very heavy, they have a fragile screen and the shape of the receiver makes it difficult to embrace them for carrying. The shape and size of the larger screened models when coupled with their considerable weight makes it difficult to manoeuvre them through conventional doorway openings. The present invention overcomes the above problems.
Broadly, the invention can be said to provide a trolley comprising an elongated frame, a pair of ground engaging wheels with a common axis of rotation located adjacent one end of the frame and projecting below the frame, a handle at the other end of the frame, a pair of first frame rails occupying a common plane and extending longitudinally of the frame so as to be at right angles to the axis of rotation of the wheels, a carriage captive on said first frame rails and slidable therealong with first supporting means on the carriage located above the frame, second supporting means on the frame adjacent said one end thereof to combine with the first supporting means to support a load when it is transported on the trolley, stair climbing means on the trolley, said stair climbing means comprising two elongated sliders mounted on the frame so as to be longitudinally movable relative to the frame, resilient biassing means biassing the sliders towards said other end of the trolley frame against stop means with step engaging surfaces on the sliders positioned in a common plane below said frame.
A presently preferred embodiment of the invention will now be described with reference to the accompanying drawings in which:
FIG. 1 is a perspective view of the trolley according to the invention,
FIG. 2 is a perspective view of the carriage of the trolley of FIG. 1,
FIG. 3 is a side view of the trolley,
FIG. 4 is an enlarged partly fragmentary perspective view of a slider member used in the step climbing operation of the trolley,
FIG. 5 is diagrammatic view of a first position in a step climbing operation of the trolley,
FIG. 6 is a view similar to FIG. 5 at a later stage in the step climbing operation and
FIG. 7 is a view similar to FIG. 5 showing the last stage in the step climbing operation.
As illustrated the trolley comprises a frame with a body part 10 and a handle part 11. The body part comprises a first pair of rails 12 which are tubular and square in section and parallel and lie in a common plane and a further pair of rails 13 which are also tubular and square in section and parallel and lie in a common plane parallel to the plane occupied by the rails 12 but lower relative to the ground, as shown in FIG. 1. The rails 12 and 13 are joined by an arched end member 14 with extended ends to provide feet 15. The handle part 11 is of U form and is made of circular cross-section tube with the free ends of the U legs pivotally connected at 16 to the rails 13 and the U legs are housed in notched lugs 17 on the rails 13. The U legs are retained in the notches of the notched lugs 17 by means of draw bolts and cam faced levers 18 both for the extended configuration where the U member provides a handle and for the folded condition where the U member legs lie closely adjacent and parallel to the further rails 13.
At the other ends of the rails 13 there are rail extensions 20 joined by a bar 19. The axis of the bar 19 is also the axis of stub axles on which two wheels 21 are rotatably mounted. There are elongated feet 22 hingedly connected to the respective rail extensions 20 allowing the feet to project at right angles to the planes occupied by the rails 12 and 13 or to be folded down in a storage condition where the feet lie parallel to each other and the bar 19.
There is a carriage 23 slidably mounted on the rails 12. The carriage comprises two sle
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patent: 1965944 (1934-07-01), Lea
patent: 1972367 (1934-09-01), Willard
patent: 2459275 (1949-01-01), Gates
patent: 2467644 (1949-04-01), Wright et al.
patent: 2635887 (1953-04-01), Menne
patent: 4275894 (1981-06-01), Mortenson
Hill Mitchell J.
Love John J.
O'Brien Anthony A.
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