Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Apparatus for applying a back pressure to a pump drive shaft seal

Apparatus for applying a back pressure to a pump drive shaft seal

US Patent 5211532 · Granted May 18, 1993

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Zero emissions reciprocating pump2015
Zero emissions reciprocating pump2013
Zero emissions reciprocating pump2012
Zero emissions reciprocating pump2010
Heat pump fluid heating system2004
System and method for file transmission using file differentiation2003
High pressure multi-stage centrifugal pumps1993
Damper control mechanism1992
Air conditioning apparatus1991
Local room thermostat1990
Air conditioning system1990
Central thermostat1990