Howard L. Johnson

Person

Joliet, IL, US

People

Patents Grantslast 30 patents

Information Patent Grant
Control for load sharing pumps
- Patent number 4,345,436
- Issue date Aug 24, 1982
- Caterpillar Tractor Co.
- Howard L. Johnson
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Flow force balanced spool valve
- Patent number 4,245,816
- Issue date Jan 20, 1981
- Caterpillar Tractor Co.
- Howard L. Johnson
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Combination check and flow control valve for hydraulic systems
- Patent number 4,204,459
- Issue date May 27, 1980
- Caterpillar Tractor Co.
- Howard L. Johnson
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Margin valve
- Patent number 4,196,588
- Issue date Apr 8, 1980
- Caterpillar Tractor Co.
- Howard L. Johnson
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Low pressure signal driven flow control system
- Patent number 4,184,410
- Issue date Jan 22, 1980
- Caterpillar Tractor Co.
- Howard L. Johnson
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydraulic system with priority control
- Patent number 4,147,034
- Issue date Apr 3, 1979
- Caterpillar Tractor Co.
- Howard L. Johnson
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Method for assembling a cartridge-type valve
- Patent number 4,142,282
- Issue date Mar 6, 1979
- Caterpillar Tractor Co.
- Howard L. Johnson
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
External centering spring adjustment for a spool valve
- Patent number 4,132,245
- Issue date Jan 2, 1979
- Caterpillar Tractor Co.
- Howard L. Johnson
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Anti-cavitation and pressure modulating relief valve for controllin...
- Patent number 4,114,516
- Issue date Sep 19, 1978
- Caterpillar Tractor Co.
- Howard L. Johnson
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Power conservation means for variable displacement pump fluid suppl...
- Patent number 4,089,170
- Issue date May 16, 1978
- Caterpillar Tractor Co.
- Howard L. Johnson
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Cartridge type check valve
- Patent number 4,084,609
- Issue date Apr 18, 1978
- Caterpillar Tractor Co.
- Howard L. Johnson
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Piston pump assembly having load responsive controls
- Patent number 4,034,564
- Issue date Jul 12, 1977
- Caterpillar Tractor Co.
- Howard L. Johnson
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
All hydraulic motor grader circuitry
- Patent number 4,033,236
- Issue date Jul 5, 1977
- Caterpillar Tractor Co.
- Howard L. Johnson
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Spring centered balanced resolver valve
- Patent number 4,024,797
- Issue date May 24, 1977
- Caterpillar Tractor Co.
- Howard L. Johnson
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Three-pump - three-circuit fluid system of a work vehicle having co...
- Patent number 3,998,053
- Issue date Dec 21, 1976
- Caterpillar Tractor Co.
- Howard L. Johnson
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Fluid system of a work vehicle having fluid combining means and sig...
- Patent number 3,991,571
- Issue date Nov 16, 1976
- Caterpillar Tractor Co.
- Howard L. Johnson
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Force balanced valve spool
- Patent number 3,990,477
- Issue date Nov 9, 1976
- Caterpillar Tractor Co.
- Howard L. Johnson
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Load responsive pump controls of a fluid system
- Patent number 3,990,236
- Issue date Nov 9, 1976
- Caterpillar Tractor Co.
- Howard L. Johnson
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Load controlled fluid system having parallel work elements
- Patent number 3,987,622
- Issue date Oct 26, 1976
- Caterpillar Tractor Co.
- Howard L. Johnson
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Fluid system of a work vehicle having fluid combining means
- Patent number 3,987,704
- Issue date Oct 26, 1976
- Caterpillar Tractor Co.
- Howard L. Johnson
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Lock valve assembly
- Patent number 3,974,742
- Issue date Aug 17, 1976
- Caterpillar Tractor Co.
- Howard L. Johnson
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Fluid filter system
- Patent number 3,959,141
- Issue date May 25, 1976
- Caterpillar Tractor Co.
- Howard L. Johnson
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Howard L. Johnson

Person

Patents Grantslast 30 patents

Control for load sharing pumps

Flow force balanced spool valve

Combination check and flow control valve for hydraulic systems

Margin valve

Low pressure signal driven flow control system

Hydraulic system with priority control

Method for assembling a cartridge-type valve

External centering spring adjustment for a spool valve

Anti-cavitation and pressure modulating relief valve for controllin...

Power conservation means for variable displacement pump fluid suppl...

Cartridge type check valve

Piston pump assembly having load responsive controls

All hydraulic motor grader circuitry

Spring centered balanced resolver valve

Three-pump - three-circuit fluid system of a work vehicle having co...

Fluid system of a work vehicle having fluid combining means and sig...

Force balanced valve spool

Load responsive pump controls of a fluid system

Load controlled fluid system having parallel work elements

Fluid system of a work vehicle having fluid combining means

Lock valve assembly

Fluid filter system