Multi-tiered system of leveller units

Details Multi-tiered system of leveller units Multi-tiered system of leveller units

1992-09-18

1994-07-12

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Inclined plane lifter

E02C 300

Patent

active

053281543

ABSTRACT:
A multi-tiered system of leveller units for the levelling of recreational vehicles. The leveller units each comprise a planar body, with upper and lower surfaces circumscribed by edges. The body of each unit bears a plurality of pins upwardly extending from spaced locations in the upper surface and has a plurality of pin-engaging pockets formed in the lower surface to matably receive corresponding pins of other similar units. The pins are of slightly smaller size than the corresponding pockets so that when the pins of one unit are associated with the pockets of another, there is provided a loose engagement therebetween. The body may be formed of a discontinuous webbing providing light-weight strength and support to the units to support the large loads placed thereupon.

REFERENCES:
patent: 3162973 (1964-12-01), Christiansen
patent: 3487579 (1970-01-01), Brettingen
patent: 3752441 (1973-08-01), Rogers
patent: 4026086 (1977-05-01), Langley
patent: 4165862 (1979-08-01), Bennett
patent: 4427179 (1984-01-01), Price
patent: 4548392 (1985-10-01), Rickling
patent: 4606732 (1986-08-01), Lyman
patent: 4744780 (1988-05-01), Volpe
patent: 4819910 (1989-04-01), Johnston
patent: 4836501 (1989-06-01), Baer

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