Patent ID: 9228664
Filing Date: 2016-01-05
CPC Classification: F16K,Y10T

Claim Text:
1. A method for operating a rotary multi-port valve mechanism having a valve body defining a valve chamber and having a primary flow port and a plurality of secondary flow ports having port seal surfaces and having a rotary diverter defining a flow passage and an internal transverse piston receptacle and having a port selector piston member that is linearly moveable within said transverse piston receptacle and having a sealing end and defining a piston flow port, comprising: rotating said rotary diverter to a position aligning said sealing end of said port selector piston member with a sealing surface of the selected secondary flow port; moving said port selector piston member linearly in an energizing direction within said internal transverse piston receptacle and establishing sealed engagement of said sealing end port selector piston member with said sealing surface of the selected secondary flow port; permitting the flow of fluid between the selected secondary flow port and said primary flow port through said piston flow port and said flow passage of said rotary diverter; terminating the flow of fluid between the selected secondary flow port and said primary flow port; moving said port selector piston member linearly in a de-energizing direction to a retracted non-sealing position within said internal transverse piston receptacle; rotating said rotary diverter to another position aligning said port selector piston member with an open sealing end facing a sealing surface of another selected flow port; and again moving said port selector piston member linearly in an energizing direction within said internal transverse piston receptacle and establishing sealed engagement of said port selector piston member with another one of said port seal surfaces.