Patent · US Expired

Hydrodynamic seal

US4705277A · kind A · utility

26Cited by
8References
3Claims
0Family size

Assignee

Inventor

Key dates

Filing dateNov 8, 1984
Grant dateNov 10, 1987
Priority date
Expiry dateNov 8, 2004

Classification

  • Technology area (CPC F)Mechanical Engineering; Lighting; Heating
  • CPC primaryF16J15/3244
  • WIPO fieldMechanical elements
  • WIPO sectorMechanical engineering

Abstract

A polytetrafluoroethylene seal is provided with surface effect vanes that effect hydrodynamic pumping of oil upon rotation of a shaft about which the seal is disposed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.