Patent ID: 11920451
Assignee: CANTEX INTERNATIONAL, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC E  F | IPC E  F

Claim 9:
10. The plug valve of claim 1, wherein:
(a) said housing valve stem passage has a first diameter portion adjacent said chamber and a second diameter portion adjacent said first diameter portion, wherein said second diameter portion has a diameter less than that of said first diameter portion thereby providing a downward facing annular shoulder in said housing valve stem passage;
(b) said upper valve stem has a first diameter portion adjacent said valve body midsection and a second diameter portion adjacent said first diameter portion, wherein said second diameter portion has a diameter less than that of said first diameter portion thereby providing an upward facing shoulder on said upper valve stem;
(c) said first seal ring is carried between said downward facing shoulder in said housing valve stem passage and said upward facing shoulder on said upper valve stem passage and between said first diameter portion of said housing valve stem passage and said second diameter portion of said upper valve stem;
(d) said cap valve stem passage has a first diameter portion adjacent said chamber and a second diameter portion adjacent said first diameter portion, wherein said second diameter portion has a diameter less than that of said first diameter portion thereby providing an upward facing shoulder in said cap valve stem passage;
(e) said lower valve stem has a first diameter portion adjacent said valve body midsection and a second diameter portion adjacent said first diameter portion, wherein said second diameter portion has a diameter less than that of said first diameter portion thereby providing a downward facing shoulder on said lower valve stein; and
(f) said second seal ring is carried between said upward facing shoulder in said cap valve stem passage and said downward facing shoulder on said lower valve stem and between said first diameter portion of said cap valve stem passage and said second diameter portion of said lower valve stem.