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US4835359A
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Method of manufacturing hemispherical tank heads
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End-of-stroke bypass valve in piston for impact relief in hydraulic tilt and trim cylinder
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Stepper motor control circuit and apparatus
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Mini arched bridge
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Magnetic detent joy stick and stack remote control valves
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Fluid valve structures
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Axial piston pumps and motors
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Gear pump or motor with tooth tips of dissimilar metal
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Fluid valve structures
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Hydraulic valve inlet unloaders
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Cribbing
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Remote valve operators
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Air shift conversion apparatus for manual valves
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Method and apparatus for tunnel lining
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Hydraulic seal having U-shaped gasket and a plurality of plastically deformable posts
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Constant speed hydrostatic drive system
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CA1148064A
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Pressure and flow compensated control systems with constant torque and viscosity sensing over-ride
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Hydraulic valves
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Cribbing
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GB2103684A
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Tunnel liners
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