Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Hydraulic rock breaker circuit for an excavator

Hydraulic rock breaker circuit for an excavator

US Patent 4230022 · Granted Oct 28, 1980

Estimated economic value: $3,263,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Pilot control system2002
Ride control2001
Oil processor circuit1997
Hydraulic system using multiple substantially identical valve assemblies1995
Poppet valve with force feedback control1995
Hydraulic control system1994
Fluid regeneration circuit1993
Hydraulic control system having poppet and spool type valves1993
Pressure compensated flow amplifying poppet valve1992
Load pressure duplicating circuit1992
Load sensing hydraulic control system1991
Hydraulic swing motor control circuit1986