Patent ID: 6609594
Filing Date: 2003-08-26
Classification: F16D

Abstract:
A disc brake assembly (10) having a support member (12) secured to a vehicle, a caliper (16) having an actuation section (18) connected by a bridge (22) to an arm (20), said actuation section (18) having a bore (24) therein for retaining a piston (26) to define an actuation chamber (28), a first friction member (30) connected to said piston (26) and a second friction member (32) connected to said arm (20), said caliper (16) having a first ear (38) and a second ear (44) extending from said actuation section (18), said first ear (38) having a first axial opening (39) for receiving a first guide pin (36) located in a first bore (40) in said support member (12) and said second ear (44) having a second axial opening (39â€²) for receiving a second guide pin (42) located in a second bore (46) of said support member (12) to align said caliper (16) over a rotor (34) associated with a wheel of the vehicle, said actuation chamber (28) on being presented pressurized fluid from a source acting on said piston (26) to develop an actuation force to move said piston (26) and first friction member (30) toward said rotor (34) and acting on said actuation section (18) causing said caliper (16) to slide on said first (36) and second (44) guide pins and move said second friction member (32) toward said rotor (34) to effect a brake application, said first (36) and second (44) guide pins each being characterized by a cylindrical member (102) having a first end (104) with a first diameter section (106) separated by a first shoulder (108) from a second end (110) with a second diameter section (112), said cylindrical member (102) having a threaded axial bore (114) that extends from a face (116) on said second end (110) toward the first end (104), a bolt (100) having head (120) with a shaft (118), said shaft (118) having a third diameter section (122) separated from a fourth diameter section (124) by a second shoulder (126), said fourth diameter section (124) having threads thereon, said third diameter section (122) having a length (11) greater than a length (12) of said first (39) and second (39â€²) axial openings in said first (38) and second (44) ears, and a resilient bushing (130) concentrically and loosely located on said third diameter section (122) while engaging one of said first (39) and second (39â€²) axial openings of said first (38) and second (44) ears when the threads on said fourth diameter section (124) are mated with said threaded axial bore (114) of said cylindrical member (102) to bring said second shoulder (126) into engagement with said face (116) on said second end (110) of said cylindrical member (102) to secure said bolt (100) to said cylindrical member (102) while defining a gap (132) between said head (120) of said bolt (100) and said ear (38,44) and/or said face (116) and said ear (38,44) such that said bolt (100) may freely be rotated and moved within said axial opening (39,39â€²) of said ear (38,44) to permit alignment of said cylindrical member (102) in said bore (40,46) of said support member (12) without caming on applying a torque force to said head (120) to attach said bolt (100) to said cylindrical member (102).