초록 ▼

The combined shock absorbing seat post and air pump assembly is for use on a bicycle or the like. The assembly comprises two hollow tubes inserted one into the other defining a compression chamber from which the compressed air may be sent to an inflatable device such as a tire. A shock absorbing mec

The combined shock absorbing seat post and air pump assembly is for use on a bicycle or the like. The assembly comprises two hollow tubes inserted one into the other defining a compression chamber from which the compressed air may be sent to an inflatable device such as a tire. A shock absorbing mechanism is further provided for attenuating jarring conditions while operating the bicycle on a rough surface. The shock absorbing mechanism comprises an helicoidal compression spring in which the tension can be adjusted by hand upon rotation of a screwed element. The assembly provides a very practical and very compact assembly that combines the advantages of an air pump in the seat post and the advantages of an easily adjustable shock absorber mounted on the seat post.

대표청구항 ▼

A combined shock absorbing seat post and air pump assembly for use on a bicycle or the like, said assembly comprising: a first hollow tube having a bottom end closed by an end wall having an air outlet hole, said first tube being insertable in a seat post sleeve of a bicycle frame and having an uppe

A combined shock absorbing seat post and air pump assembly for use on a bicycle or the like, said assembly comprising: a first hollow tube having a bottom end closed by an end wall having an air outlet hole, said first tube being insertable in a seat post sleeve of a bicycle frame and having an upper open end; a second hollow tube in sliding relationship with said first tube through the upper open end thereof and fitted therein, said second tube being closed by a wall separating a compression chamber from ambient air and having an air inlet hole, the compression chamber being defined by at least the end wall of said first tube and the wall of said second tube; air connecting means connected to the air outlet hole made through said end wall of said first tube and having a free end attachable to an air valve of an inflatable device for providing compressed air thereto when reducing the volume of the compression chamber upon reciprocal movement of said first and second tubes; a first check valve, located in said air connecting means, for preventing air in the inflatable device from escaping through said air connecting means; a second check valve set in the air inlet hole for preventing air in the compression chamber from escaping through the air inlet hole; and shock absorbing means for attenuating jarring conditions while operating the bicycle on a rough surface, said shock absorbing means comprising: a helicoidal spring mounted around said second tube for forcing opposite movement of said first and second tubes, said spring having a lower end resting on a shoulder of said first tube and an upper end secured to said second tube; an internally threaded element in mesh with an externally threaded segment of said second tube for securing said upper end of said spring to said second tube, said threaded element being rotatable by hand along said segment for modifying the tension of said spring; and resilient sealing means mounted around said spring for substantially hermetically sealing said spring from ambient air.