Patent ID: 7722279
Filing Date: 2010-05-25
Classification: F16B,G02B,Y10T

Abstract:
1. A molded plastic insert that is configured to mate with a spring loaded plunger, said insert comprising a flat bottom surface, a top surface that is opposite the bottom surface, and a perimeter surface extending between the bottom surface and the top surface, said perimeter surface of said insert defining a generally circular section and a generally elliptical section, a generally spherical depression located on the top surface in the circular section of said insert and a groove located on the top surface in the generally elliptical section extending from the generally spherical depression to the perimeter surface of the generally elliptical section, the groove tapering from a larger dimension adjacent the perimeter surface to a smaller dimension adjacent the generally spherical depression, a depth of the groove being greater at the perimeter surface than at the generally spherical depression, a through hole extending from the generally spherical depression to the flat bottom surface, and a pair of spaced apart generally arcuate indentations formed in the circular section on the perimeter surface.