公开(公告)号：US3572376A

公开(公告)日：1971-03-23

申请号：US3572376D

申请日：1968-07-31

Applicant: BENDIX CORP

Inventor： PFEIFER GUNTHER ,  ROSBACK RICHARD H

IPC: F16K1/42 ,  B60T13/24 ,  B60T13/57 ,  F16K15/18 ,  F16K17/04

CPC classification number: B60T13/245 ,  Y10T137/7841 ,  Y10T137/7895 ,  Y10T137/86976

Abstract: A POPPET VALVE FOR A SERVOMOTOR IS A POWER BRAKING SYSTEM. THE VALVE STEM OF THE POPPET VALVE HAS A SMALL DIAMETER WHICH LOOSELY EXTENDS THROUGH AN OPENING IN THE HOUSING CONNECTING THE CONTROL CHAMBER WITH THE ATMOSPHERIC CHAMBER. A DISC-SHAPED REINFORCED MEMBER HAS A CENTRAL OPENING LOOSELY SURROUNDING THE VALVE STEM. A PERIPHERAL SKIRT ENCLOSES A RUBBER MATERIAL ATTACHED TO THE INNER AND OUTER SURFACES OF THE REINFORCING MEMBER. A CAP MEMBER ATTACHED TO THE VALVE STEM PERMITS A SPRING OPERATIVELY CONNECTED TO A FLANGE SECTION OF THE STEM TO SEAT THE CAP MEMBER ON THE REINFORCING MEMBER WHILE THE REINFORCING MEMBER IS SEATED ON THE OPENING IN THE HOUSING. UPON APPLICATION AND RELEASE OF THE BRAKES, THE VALVE STEM WILL CORRESPONDINGLY MOVE THE REINFORCING MEMBER WITH THE RUBBER-LIKE SURFACES AWAY FROM THE OPENINGS TO PERMIT COMMUNICATION OF ATMOSPHERIC PRESSURE TO THE CONTROL CHAMBER WHERE A CONDUIT CARRIES THIS PRESSURE TO A POWER CHAMBER WHICH OPERATES THE SERVOMOTOR. AFTER THE REINFORCING MEMBER HAS BEEN UNSEATED, THE PERIPHERAL SKIRT WILL PROVIDE A BEARING SURFACE TO GUIDE THE INNER SURFACE INTO SEATING ALIGNMENT WITH THE OPENING IN THE HOUSING WHILE THE CENTRAL OPENING IN THE REINFORCING MEMBER WILL PERMIT LATERAL MOVEMENT WITH RESPECT TO THE VALVE STEM TO ASSURE SEATING OF THE CAP MEMBER.