Inventors:
Vincent F. Troiani - New Florence PA
Gregory L. Johnston - Tarentum PA
John B. Carroll - Irwin PA
Gary M. Sich - Irwin PA
Wei Li - Pittsburgh PA
Robert D. Dimsa - Elizabeth PA
Michael J. Veltri - Pittsburgh PA
Daniel G. Scott - Pittsburgh PA
Assignee:
Westinghouse Air Brake Company - Wilmerding PA
International Classification:
F16L 3728
Abstract:
A dual valve fitting enables quick measurement of pressure contained within a housing. The fitting includes a valve body, a valve retainer, first and second sealing rings and a biasing mechanism. The valve body defines a flow passage within which is situated the valve retainer. The valve body is designed at its protuberant end to mate with a female coupler of a quick connect device and at its threaded end to screw into a threaded bore of the housing. The valve retainer defines around itself first and second annular recesses each of which spaced apart from the other to match the spacing of outer and inner annular valve seats formed in the flow passage. Forming a first valve, the first sealing ring retains in the first annular recess so as to be seatable against the outer valve seat. Forming a second valve, the second sealing ring retains in the second annular recess so as to be seatable against the inner valve seat. The valve retainer is biased within the flow passage so that the first and second sealing rings seat against the outer and inner valve seats, respectively, thereby rendering the first and second valves normally closed.