초록 ▼

A jack comprises a main frame device, an extensible rod device and two wheels. The main frame device has an upright pipe, a driving rod connected to the upright pipe, a reinforced plate connected to the driving rod and the upright pipe, an upper rod inserted in the upright pipe, and an upper block m

A jack comprises a main frame device, an extensible rod device and two wheels. The main frame device has an upright pipe, a driving rod connected to the upright pipe, a reinforced plate connected to the driving rod and the upright pipe, an upper rod inserted in the upright pipe, and an upper block mounted on the upper rod. The extensible rod device has an outer pipe, a middle pipe inserted in the outer pipe, and an inner pipe inserted in the middle pipe. An inserted end of the driving rod is inserted in a lower end of the outer pipe. Two wheels are fastened on the upright pipe pivotally.

대표청구항 ▼

[ I claim:] [1.] A vehicle jack comprising:a main frame device having an upright pipe, a driving rod connected to said upright pipe, an upper rod inserted in said upright pipe, and a generally U-shaped upper block mounted on said upper rod,an extensible rod device having an outer pipe, a middle pipe

[ I claim:] [1.] A vehicle jack comprising:a main frame device having an upright pipe, a driving rod connected to said upright pipe, an upper rod inserted in said upright pipe, and a generally U-shaped upper block mounted on said upper rod,an extensible rod device having an outer pipe, a middle pipe inserted in said outer pipe, and an inner pipe inserted in said middle pipe,a protruded flange formed at a bottom of said middle pipe,an upper annular recess formed in an upper end of said outer pipe,a lower annular recess formed in an lower end of said outer pipe,a first recess rail formed in an inner periphery of said outer pipe between said upper annular recess and said lower annular recess to receive said protruded flange,an upper annular groove formed in an upper end of said middle pipe,a lower annular groove formed in a lower end of said middle pipe,a second recess rail formed in an inner periphery of said outer pipe between said upper annular recess and said lower annular recess to receive said protruded block,said driving rod having an inserted end inserted in a lower end of said outer pipe,a support block disposed beneath said driving rod,two parallel lobes attached to said upright pipe,a support plate having an upper end aligned between said parallel lobes,a pivot pin fastening said support plate and said parallel lobes together,said upright pipe having a shaft hole and a first and second positioning holes,a shaft fastening two wheels on said upright pipe pivotally,said upper rod having a through hole and a plurality of round holes,a first positioning rod fastening said upright pipe and said upper rod together,said generally U-shaped upper block having a slot and a circular hole,a second positioning rod fastening said generally U-shaped upper block and said upper rod together, anda protruded block formed at a bottom of said inner pipe.