Hydraulic pump for vehicle antilock brake - uses piston with pair of seals insertable into housing bore

摘要

The hydraulic pump also used for a vehicle traction (TCS) in which the housing bore (11) is formed in a housing (10). The piston (20) which has two seals (23, 24) made of elastic material to seal the region between the pump chamber (12) and the suction pipe and between the suction pipe and the housing chamber, is insertable in the housing bore. The cross section surface of the seal between the pump chamber and the suction pipe has an undulating convex or an undulating concave profile. The other seal of the pair is similarly shaped. ADVANTAGE - Gives a light and compact construction with fewer parts; ensures a stable pressure medium delivery.