US 5,630,250 AGranted

Drawbar device

OwnerCheng-Tsan Chouinventor

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Abstract

A drawbar device comprises a first sectional handle, a second sectional handle coupling with the first sectional handle, an upper seat disposed under the sectional handles, a push button disposed in the first and second sectional handles, a first and second control plates connecting two ends of the push button respectively, the upper ends of the first and second control rods connecting the first and second control plates respectively, the lower ends of the first and second control rods connecting a first and second positioning blocks respectively, the first and second positioning blocks inserted in a first and second drawbars respectively to engage with a first and second pinions therein, a first and second outer pipes encasing the first and second drawbars respectively, and a lower seat having two recess holes to receive the lower ends of the corresponding first and second outer pipes respectively.

A drawbar device comprising:

a first sectional handle having a first rectangular recess formed on an upper middle portion of said first sectional handle and a first retaining plate disposed at a bottom of said first sectional handle transversely;
a first and second positioning holes formed on said first sectional handle;
a second sectional handle having a second rectangular recess formed on an upper middle portion of said second sectional handle and a second retaining plate disposed at a bottom of said second sectional handle transversely;
a third and fourth positioning holes formed on said second sectional handle;
said second sectional handle coupling with said first sectional handle to form a grip;
an upper seat disposed under said grip;
said first and second rectangular recesses receiving a top portion of a push button;
two blind holes formed at two opposite ends of said push button;
a first and second control plates connecting said corresponding blind holes, respectively;
said first control plate having a first through hole thereon, a first pin hole, and a first protrusion to receive a first spring;
said second control plate having a second through hole thereon, a second pin hole to receive an elongated pin, and a second protrusion to receive a second spring;
two ends of said grip connecting two upper ends of a first and second drawbars, respectively;
a first and second square holes formed at two lateral ends of said upper seat, respectively;
two upper ends of a first and second control rods connecting said first and second control plates, respectively;
each of a first and second positioning blocks having a round hole to receive a corresponding lower end of said control rod, respectively;
each of said first and second positioning blocks having a lower lug to engage with a corresponding first and second pinions, respectively;
said first and second positioning blocks inserted in said first and second drawbars, respectively;
each of said first and second drawbars having a circular hole and a rectangular notch at a lower end of each of said first and second drawbars, respectively;
each said rectangular notch receiving said pinion;
each said pinion having a center hole;
a positioning pin passing through said circular hole and said center hole to fasten said pinion in said drawbar pivotally;
a first rack and said first drawbar inserted in a first outer pipe in parallel;
a second rack and said second drawbar inserted in a second outer pipe in parallel;
each said rack having a plurality of positioning teeth to engage with pinion teeth of said pinion;
a lower seat having two recess holes to receive two lower ends of said corresponding first and second outer pipes, respectively;
said first control plate and said second control plate being pivotally fastened to said grip;
said first spring disposed between said first control plate and said grip;
and
said second spring disposed between said second control plate and said grip .

26 more elements

Abstract

Claims1