Patent ID: 6928899

Claim:
A striking head-interchangeable hammer comprising: a handle; a head body connected securely to said handle, having opposite upper and lower ends, and formed with a through-hole that extends between said upper and lower ends, an upper bore that extends from said through-hole to said upper end of said head body, and a lower bore that is opposite to said upper bore and that extends from said through-hole to said lower end of said head body, said upper bore being defined by a bore-defining wall that defines a first abutting face transverse to the length of said through-hole; a first striking body mounted detachably on said lower end of said head body and having a striking portion and a connecting portion that extends from said striking portion, that is received fittingly in said lower bore in said head body, and that is formed with an inner thread; and a stress-distributable fastener including a connecting rod that extends fittingly through said through-hole and said upper and lower bores in said head body and that has a threaded lower end which engages threadedly said inner thread of said connecting portion of said first striking body, and an upper end which is opposite to said threaded lower end and which is formed with an abutting flange extending radially and outwardly therefrom, said abutting flange being received fittingly in said upper bore, and defining a second abutting face that is anchored on and that abuts against said first abutting face of said bore-defining wall of said upper bore upon tightening of said threaded lower end of said connecting rod onto said inner thread of said connecting portion of said first striking body so as to distribute stress, which results from a hammering operation, to said abutting flange, and so as to prevent concentration of the stress on said threaded lower end of said connecting rod and loosening of said first striking body from said head body.