Patent ID: 9375985
Filing Date: 2016-06-28
CPC Classification: B60C,G05D,Y10T

Claim Text:
1. A valve comprising: a stem having a longitudinal axis and a fluid channel formed along said longitudinal axis, the stem comprising: a sleeve translatably disposed about the stem so as to allow closing and opening of the auxiliary port; a first seal disposed for sealing engagement between the stem and the sleeve, the first seal being disposed about the stem between the auxiliary port and the post end; a lock ring disposed between the first seal and the post end; a second seal disposed for sealing engagement between the stem and the sleeve, the second seal being disposed about the stem between the auxiliary port and the base end; a spring disposed about the stem between the second seal and the base end, the spring engaging the sleeve so as to urge the sleeve against the lock ring; wherein when the sleeve is urged against the lock ring, the auxiliary port is closed to prevent fluid from flowing therethrough, and the first and second seals sealingly engage the stem and sleeve; and wherein the sleeve may be forcibly translated against spring pressure along the stem away from the lock ring so as to open the auxiliary port and allow fluid to flow therethrough.