Daniel R Scott

US Patent:

60708549, Jun 6, 2000

Filed:

Nov 12, 1997

Appl. No.:

8/968271

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

US Classification:

2511496

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.

US Patent:

6029700, Feb 29, 2000

Filed:

Aug 31, 1998

Appl. No.:

9/144676

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:

E03B 100

US Classification:

137613

Abstract:

A dual valve fitting enables pressure within a housing to be quickly measured. The fitting defines a passage between its threaded and protuberant ends. The threaded end screws into the housing. In an upper section of the passage, a first valve atop a valve stem features a poppet head that is seatable against an outer valve seat. A first biasing mechanism compels the head against the outer seat to keep the first valve normally closed. In a lower section of the passage, a second valve features a seat piece and a valve retainer. On its periphery, the seat piece carries an o-ring which sealingly secures the piece within the passage. The piece defines an inner bore between its ends and has an inner valve seat on its bottom. The top of the retainer is extendable through this inner bore to a point a dead space apart from a bottom of the stem. Around its bottom, the retainer carries an annular check valve.

US Patent:

60892684, Jul 18, 2000

Filed:

Aug 31, 1998

Appl. No.:

9/144621

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

US Classification:

13761411

Abstract:

A dual valve fitting enables pressure within a housing to be quickly measured. The fitting includes first and second valve bodies. The first body defines a passage between its threaded and protuberant ends. In the passage, a first valve atop a valve stem features a poppet head that is seatable against an outer valve seat. A first biasing mechanism compels the poppet head against the outer valve seat so that the first valve is normally closed. The second body defines a bore between its upper and lower threaded ends which communicates with the passage. The upper threaded end connects with the threaded end of the first body whereas the lower threaded end is designed to screw into a threaded bore of the housing. In the bore, a second valve features a retainer whose top defines a recess that retains a seal element that is seatable against an inner valve seat. A second biasing mechanism acts upon the retainer so that the seal element therein seats against the inner valve seat thereby rendering the second valve normally closed.