Patent ID: 6374721
Filing Date: 2002-04-23
Classification: B60T

Abstract:
A brake vacuum booster assembly comprising:a booster housing with a plurality of chambers and a diaphragm separating said chambers; a power piston having a first passageway in fluid communication with one of said chambers with said diaphragm interconnected to said power piston for moving said power piston along an axis; a cylinder at least partially disposed within a portion of said power piston for movement along said axis relative to said power piston, said cylinder having a second passageway vented to atmosphere and in fluid communication with said first passageway; a valve movable to an open position when said cylinder is moved along said axis and relative to said power piston toward said booster housing, said valve arranged between said first and said second passageways for connecting said passageways and venting said second passageway and said one of said chambers to atmosphere when in said open position; an electric actuator retained within a cavity in said cylinder for coacting with said valve and moving said valve to said open position in response to an electronic request signal; a cylinder cap connected to an end of said cylinder for retaining said electric actuator within said cavity, said cylinder cap having an opening aligned with said second passageway; and a retaining mechanism interposed between the cylinder and the cylinder cap for preventing axial and rotational movement of said cylinder cap relative to said cylinder to securely retain said electric actuator within said cavity and maintain alignment of said opening and second passageway.