Patent ID: 6902140
Filing Date: 2005-06-07
Classification: E06C,F16M

Abstract:
1. An adjustable support foot, comprising: a support post having a base and a screwed axle erected thereon; a plurality of retaining plates each provided with a screw thread on an inner wall thereof, a rim of an upper end of each of said retaining plates being provided with a tapered surface, a rim of a lower end of each of said retaining plates being provided with a transverse flange having a tapered surface; a control device including a retaining cylinder, a control ring, a spring, an axial actuator and a radial actuator, said retaining cylinder being a hollow cylindrical body provided with a lower receptacle hole and an upper axial hole, a top end of said receptacle hole being connected to said axial hole through a tapered section, a wall of said retaining cylinder surrounding said receptacle hole being provided with a plurality of inwardly tapered through holes each for housing a steel ball, said control ring being a ring body enclosing said retaining cylinder, an inner wall having a plurality of slots, said spring coaxially situating in an upper portion of said retaining cylinder and constantly pushing said control ring downward, said axial actuator being connected to said control ring for controlling the elevation of said control ring, said radial actuator being connected to said retaining plates for pulling said retaining plates outward by an elastic means thereof; and an outer shell being a hollow shell body enclosing said control device, said outer shell having two axial holes each on a top surface and a bottom surface thereof, said bottom axial hole further including an upwardly tapered section; whereby at least two retaining plates are used to engage said screwed axle of said support post and then housed in said receptacle hole of said retaining cylinder, said retaining plates being secured within said retaining cylinder by engaging said upper tapered surfaces of said retaining plates with said tapered section of said retaining cylinder and said flanges of said retaining plates with said tapered section of said outer shell, said axial actuator and said radial actuator capable of being controlled from outside for quickly adjusting the height of said adjustable support foot.