Patent ID: 7234375

Claim:
An electric air pressure corkscrew comprising: an upper shell, a motor and a battery base deposited in said upper shell, a cap covered on an upper side of said upper shell, said cap having a push button fixed in its center portion to expose upward, an electric switch fixed under and pushed by said push button; a lower shell fixed under said upper shell and having an annular projection formed in a lower end, a fix base fixed in said lower shell, a speed-reducing gear unit fixed in said fix base, said speed-reducing gear unit connected to a spindle of said motor and having a projecting shaft extending downward; a rotatable block fixed under said projecting shaft and having two oppositely spiral surfaces formed in a lower end, a positioning plate fixed in said fix base and having a multiagonic hole; an air cylinder fixed under said position plate and having plural air holes in a lower end, a piston fitted movably in an interior of said air cylinder, said piston having an anti-leak gasket fixed thereon and plural air holes in a lower end, a multiagonic member fixed on said piston and extending in said multiagonic hole of said position plate, an interactive block fixed on said multiagonic member and capable of corresponding to said two oppositely spiral surfaces of said rotatable block; a spring placed under said piston; a check valve deposited under said air cylinder; a needle placed under said check valve and having a center lengthwise hole and an air hole near its lower tip and communicating with said center lengthwise hole; a tubular slide base fitted around said fix base and having a projecting strip lengthwise on an inner wall to fit with a slide groove provided in an outer wall of said fix base; a slide tube fixed under said slide base and having a hole in an upper end for said needle to insert through down, said slide tube further having two oppositely inclined slide grooves on an outer wall; a rotatable sleeve fitted around a lower end of said lower shell and having annular fitting member on an upper end for fitting with said annular projection of said lower shell; and, a bottom base fixed under said rotatable sleeve and having two opposite projections on an inner wall to fit in said two oppositely inclined slide grooves of said slide tube.