초록 ▼

In a bicycle frame comprising a plurality of tubes having hollow ends and a plurality of fittings having pins fitting in the hollow ends, each pin extends along an axis and has an outer surface portion of axially constant section centered on the axis and engaged in the respective tube end, an inner

In a bicycle frame comprising a plurality of tubes having hollow ends and a plurality of fittings having pins fitting in the hollow ends, each pin extends along an axis and has an outer surface portion of axially constant section centered on the axis and engaged in the respective tube end, an inner surface portion centered on the axis and flaring axially inward away from the inner end of the respective outer surface portion, and a shoulder surface projecting generally perpendicular from the inner end of the respective inner surface portion and facing outward. Each tube end has an end surface abutting flatly inward on the respective shoulder surface and an inner surface having an inner surface portion fitted tightly over and complementary to the inner surface portion of the respective pin and an outer surface portion radially slightly spaced from and facing the outer surface portion of the respective pin. An adhesive generally fills between the outer surface portions of each pin and the respective tube and adheres same together.

대표청구항 ▼

A bicycle frame comprising: a top tube having front and rear ends; a down tube having upper and lower ends; a seat tube having upper and lower ends; two seat stays having upper and lower ends; two chain stays having front and rear ends; a head-tube fitting having pins fitted into the front end of th

A bicycle frame comprising: a top tube having front and rear ends; a down tube having upper and lower ends; a seat tube having upper and lower ends; two seat stays having upper and lower ends; two chain stays having front and rear ends; a head-tube fitting having pins fitted into the front end of the top tube and the upper end of the down tube; a front sprocket fitting having pins fitted into the lower ends of the down and seat tubes and into the front ends of the chain stays; respective rear sprocket fittings having pins fitting into the rear ends of the chain stays and into the lower ends of the seat stays: a seat fitting having a pin fitted into the rear end of the top tube and another pin; means connecting the other pin to the upper ends of the seat stays, each pin extending along a respective axis and having an outer surface portion of axially constant section centered on the axis and engaged in the respective tube end, an inner surface portion centered on the axis and flaring axially inward away from the inner end of the respective outer surface portion, and a shoulder surface projecting generally perpendicular from the inner end of the inner surface portion and facing outward; each tube end has an end surface abutting flatly on the respective shoulder surface and an inner surface having an inner surface portion fitted tightly over and complementary to the inner surface portion of the respective pin and an outer surface portion radially slightly spaced from and facing the outer surface portion of the respective pin; and respective bodies of adhesive generally filling between the outer surface portions of each pin and the respective tube and adhering same together.