초록 ▼

A variable speed bump apparatus comprising a pivoting ramp element hinged at one end, at least one piston and cylinder assembly supporting the pivoting ramp element and a first flow control valve and wherein the first flow control valve is operative to control the response of the pivoting ramp eleme

A variable speed bump apparatus comprising a pivoting ramp element hinged at one end, at least one piston and cylinder assembly supporting the pivoting ramp element and a first flow control valve and wherein the first flow control valve is operative to control the response of the pivoting ramp element.

대표청구항 ▼

[ I claim:] [1.] A variable speed bump apparatus comprising:a pivoting ramp element hinged at one end and arranged for angular motion about said one end;at least one piston and cylinder assembly supporting said pivoting ramp element, said at least one piston and cylinder assembly comprising a piston

[ I claim:] [1.] A variable speed bump apparatus comprising:a pivoting ramp element hinged at one end and arranged for angular motion about said one end;at least one piston and cylinder assembly supporting said pivoting ramp element, said at least one piston and cylinder assembly comprising a piston arranged for reciprocating sliding motion against a fluid in a cylinder, said cylinder having an orifice through which said fluid can be evacuated when said piston presses against said fluid; anda first flow control valve arranged to close against said orifice, an amount of closing of said first flow control valve against said orifice controlling the rate of passage of said fluid through said orifice,wherein a duration of a downward force applied against said ramp element causes an angular downward motion of said ramp element about said one end and causes said piston to press against said fluid, wherein a shorter such duration increases a pressure drop of said fluid through said orifice and retards the angular downward motion of said ramp element, and a longer such duration decreases a pressure drop of said fluid through said orifice and hastens the angular downward motion of said ramp element.