Bellows seal and method for assembling

Claim 1

Bellows seal assembly comprising: a. convoluted expandable or compressible bellows whose external periphery is pressurized having a circular interior non-pressurized passage throughout with one terminating end of said bellows connected to a plate having a diameter that extends over said interior passage of the bellows, the other end welded to a lower fitting having an interior bore followed by a cylindrical extension said cylindrical extension and said interior bore extending beyond the terminating end of said bellows and where a portion of the fitting having the interior bore is tubular in shape; b. a valve stem having a radially grooved lower terminating tip passing through said interior passage of the bellows and slidingly engaging said grooved tip within the interior bore of said fitting but not extending through the complete length of said fitting, and wherein part of the tubular section of said fitting is crimped towards the center in order to displace a portion of the tubular wall towards and inside the stem groove for securing said fitting to said valve stem within the non-pressurized interior of said bellows and securing said fitting to a valve sealing means to allow reciprocating movement of said valve sealing means and thereby preventing said stem from disengaging from said fitting while allowing a free rotational movement of said stem within the interior bore of said fitting by the stem groove and the crimped section thereby preventing breakage of said bellows when the valve stem is improperly rotated.