Assignee
COMMERCIAL SHEARING
US43 patents
Top patents by PatentIndex Score
US4879501ANov 7, 1989
Constant speed hydrostatic drive system
COMMERCIAL SHEARING35 citations92
US4777981AOct 18, 1988
Magnetic detent joy stick and stack remote control valves
COMMERCIAL SHEARING39 citations91
US4682939AJul 28, 1987
Gear pump or motor with tooth tips of dissimilar metal
COMMERCIAL SHEARING45 citations91
USD273586SApr 24, 1984
Convertable pump and motor
COMMERCIAL SHEARING28 citations90
US4830536AMay 16, 1989
Method and apparatus for tunnel lining
COMMERCIAL SHEARING50 citations86
US4470776ASep 11, 1984
Methods and apparatus for gear pump lubrication
COMMERCIAL SHEARING32 citations83
US4835359AMay 30, 1989
Method of manufacturing hemispherical tank heads
COMMERCIAL SHEARING38 citations81
US4187877AFeb 12, 1980
Compensated work port fluid valves
COMMERCIAL SHEARING21 citations80
US4497597AFeb 5, 1985
Cribbing
COMMERCIAL SHEARING22 citations75
US4358724ANov 9, 1982
Solid state servo amplifier for a D.C. motor position control system
COMMERCIAL SHEARING10 citations74
US4519419AMay 28, 1985
Hydraulic valves
COMMERCIAL SHEARING12 citations72
US4519420AMay 28, 1985
Hydraulic valves
COMMERCIAL SHEARING10 citations72
US4058135ANov 15, 1977
Compensated work port fluid valves and work port compensators
COMMERCIAL SHEARING10 citations72
US4789002ADec 6, 1988
Fluid valve structures
COMMERCIAL SHEARING9 citations71
US4709724ADec 1, 1987
Fluid valve structures
COMMERCIAL SHEARING9 citations71
USD273587SApr 24, 1984
Convertable pump and motor
COMMERCIAL SHEARING9 citations71
US4245547AJan 20, 1981
Rotary to linear servo mechanisms
COMMERCIAL SHEARING7 citations71
US4242066ADec 30, 1980
Rotary pumps and motors and thrust plates therefor
COMMERCIAL SHEARING16 citations71
US4095617AJun 20, 1978
Control valves
COMMERCIAL SHEARING18 citations71
US4825752AMay 2, 1989
End-of-stroke bypass valve in piston for impact relief in hydraulic tilt and trim cylinder
COMMERCIAL SHEARING23 citations69
US4361169ANov 30, 1982
Pressure compensated control valves
COMMERCIAL SHEARING18 citations69
US4352375AOct 5, 1982
Control valves
COMMERCIAL SHEARING13 citations69
US4262915AApr 21, 1981
Low friction drag seals
COMMERCIAL SHEARING18 citations69
US4086767AMay 2, 1978
Track drive circuits with synchronization and steering systems
COMMERCIAL SHEARING19 citations68
US4565469AJan 21, 1986
Cribbing
COMMERCIAL SHEARING18 citations66
US4111103ASep 5, 1978
Thrust rings for swash plate pumps and motors
COMMERCIAL SHEARING17 citations65
US4349319ASep 14, 1982
Pressure and flow compensated control system with constant torque and viscosity sensing over-ride
COMMERCIAL SHEARING11 citations64
US4585024AApr 29, 1986
Air shift conversion apparatus for manual valves
COMMERCIAL SHEARING12 citations63
US4337018AJun 29, 1982
Rotary impeller pump or motor with counterbalancing chamber in thrust plate bearing counterbore
COMMERCIAL SHEARING10 citations62
US4569367AFeb 11, 1986
Hydraulic valve inlet unloaders
COMMERCIAL SHEARING5 citations61
US4194366AMar 25, 1980
Two speed valves and bi-directional motor system
COMMERCIAL SHEARING2 citations61
US4354526AOct 19, 1982
Control valves
COMMERCIAL SHEARING4 citations60
US4839935AJun 20, 1989
Mini arched bridge
COMMERCIAL SHEARING10 citations59
US4803415AFeb 7, 1989
Stepper motor control circuit and apparatus
COMMERCIAL SHEARING14 citations59
US4237769ADec 9, 1980
Relief valves and mine props incorporating the same
COMMERCIAL SHEARING4 citations58
US4159024AJun 26, 1979
Fluid control valve
COMMERCIAL SHEARING7 citations58
US3975993AAug 24, 1976
Piston-rod unit for hydraulic machines
COMMERCIAL SHEARING8 citations58
US4636155AJan 13, 1987
Hydraulic seal having U-shaped gasket and a plurality of plastically deformable posts
COMMERCIAL SHEARING5 citations57
US4338962AJul 13, 1982
Control and relief valves
COMMERCIAL SHEARING3 citations57
US4744288AMay 17, 1988
Axial piston pumps and motors
COMMERCIAL SHEARING3 citations54
US4569372AFeb 11, 1986
Remote valve operators
COMMERCIAL SHEARING4 citations52
US4292013ASep 29, 1981
Rotary impeller or motor with pressure balanced end plates
COMMERCIAL SHEARING3 citations49
US4070866AJan 31, 1978
Tunnel liners and methods of making the same
COMMERCIAL SHEARING6 citations46