Patent ID: 6848354

Claim:
A rod/piston assembly comprising: a unitary rod member including a lower bezel portion having a lower bezel portion outer diameter, a connecting rod portion and a knob portion having a knob portion outer diameter less than said lower bezel portion outer diameter; said lower bezel portion defining opposed first and second sides such that said connecting rod portion terminates in said first side of said lower bezel portion and said knob portion extends from said second side of said lower bezel portion; said knob portion defining a free surface opposite said second side of said lower bezel portion; and a relatively flat and annular compression ring defining a hole receiving said knob portion and an annular securing surface portion facing said second side of said lower bezel portion, said compression ring being secured to said unitary rod member along said securing surface, and having an unsecured annular surface portion extending radially outward from said annular securing surface.