Invention Grant
- Patent Title: Low friction coatings for dynamically engaging load bearing surfaces
- Patent Title (中): 低摩擦涂层，用于动态接合承载表面
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Application No.: US11639868Application Date: 2006-12-15
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Publication No.: US08146889B2Publication Date: 2012-04-03
- Inventor: Rick C. Hunter
- Applicant: Rick C. Hunter
- Applicant Address: US TX Houston
- Assignee: Vetco Gray Inc.
- Current Assignee: Vetco Gray Inc.
- Current Assignee Address: US TX Houston
- Agency: Bracewell & Giuliani LLP
- Main IPC: F16K3/00
- IPC: F16K3/00
Abstract:
A gate valve has a body, the body having a cavity and a flow passage intersecting the cavity. A seat ring is mounted to the body at the intersection of the flow passage and the cavity, the seat ring having an engaging face. A gate in the cavity has an engaging face that slidingly engages the face of the seat ring while being moved between open and closed positions. A friction-resistant coating is on at least one of the faces.
Public/Granted literature
- US20070163655A1 Low friction coatings for dynamically engaging load bearing surfaces Public/Granted day:2007-07-19
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