Patent ID: 7344006
Filing Date: 2008-03-18
Classification: F16D

Abstract:
1. In a piston assembly for use in a brake assembly having a brake stack wherein the piston assembly has a one piece piston sleeve having a first end, a second end, an external radius, and an internal radius, and a one piece cap on said piston sleeve second end, the improvement comprising; said cap having a first end, a middle portion and a second end, wherein said cap first end has an external radius and said cap second end has an external radius, and wherein said cap first end external radius is smaller than said cap second end external radius, and wherein the middle portion is stepped to transition from the cap first end external radius to the cap second end external radius, wherein said cap first end external radius is such that said cap first end slides into said piston sleeve, and wherein said cap middle portion has a conical mating surface, hereinafter referred to as the cap conical mating surface, for mating with said piston sleeve second end, and wherein said piston sleeve second end has a corresponding conical mating surface, hereinafter referred to as the piston sleeve conical mating surface, for mating with said cap conical mating surface, wherein said cap conical mating surface and said piston sleeve conical mating surface each have a frustoconical shape which opens away from the brake stack, and wherein said cap second end external radius is larger than said piston sleeve external radius, and wherein said cap second end further comprises a disc portion, operative to engage the brake stack.