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In 1879, Auguste Bartholdi received design patent number 11,023 titled "Design for a Statue". It was for the Statue of Liberty.
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| Number | Title | Issue Date |
| 6056294 | Self-energizing one piece seal A self energizing one piece seal has an annular seal body and a multiplicity of circumferentially spaced delta shaped resilient tabs extending inwardly from the annular body. The seal is adapted to be placed in an annular groove of a cylindrical member so... | 05/02/2000 |
| 5979504 | Rotary control valve A rotary control valve includes a directional control valve having a rotatable valve element for controlling the direction of fluid flow from an input passage to a pair of control ports and from the control ports to a drain passage. A pressure regulating ... | 11/09/1999 |
| 5913577 | Pilot stage of an electrohydraulic control valve A pilot stage of an electrohydraulic control valve controls the position of a pilot actuated main stage by controlling fluid flow through a flow path that connects a supply port to an exhaust port and to an end of the main stage. A proportional valve of t... | 06/22/1999 |
| 5906351 | Integrated electrohydraulic actuator A low cost, electromagnetic efficient integrated electrohydraulic actuator includes a sleeve disposed within a housing and an annular electric coil formed as an integral part of the sleeve so that the coil is deeply integrated in the housing. An armature ... | 05/25/1999 |
| 5876184 | Electrohydraulic pressure regulating valve An electrohydraulic pressure regulating valve comprises a variable orifice disposed between a supply port and a control port and has a fixed size vent orifice disposed downstream of the variable orifice and in parallel with the control port to reduce the ... | 03/02/1999 |
| 5875682 | Operator controlled electrical output signal device Fore and aft movement of a lever pivots first and second shafts of a cross shaped member while left and right movement of the lever causes a yoke of the lever to pivot on third and fourth shafts of the cross shaped member. The pivotal movement of the firs... | 03/02/1999 |
| 5868166 | Pressure regulating valve A pressure regulating valve usable in combination with a hydraulic steering system has a spring mechanism axially disposed between a pair of axially aligned valve spools. Movement of the spring mechanism in a first direction resiliently moves one of the v... | 02/09/1999 |
| 5868059 | Electrohydraulic valve arrangement An electrohydraulic displacement controlled valve module is disposed in a bore of a valve body for controlling fluid flow between first and second ports. A main valve element slideably disposed in the bore is biased to a closed position blocking communica... | 02/09/1999 |
| 5826487 | Pressure control for a pair of parallel hydraulic circuits An unloader valve is connected to a pump and has first and second ends, a priority flow port communicating with the first end and being connected to a first conduit connected to a first hydraulic circuit, an excess flow port communicating with a tank, and... | 10/27/1998 |
| 5819866 | Active pitch control for a mobile machine An active pitch control is provided for counteracting the pitching motion of a mobile machine. The machine has an apparatus for transmitting driving torque from an engine to a pair of pneumatic tires. The pitch control includes a device for detecting a pi... | 10/13/1998 |
| 5809841 | Variable position detent mechanism for a control lever A variable position detent mechanism for latching a control lever at an infinite number of operating positions includes a semi-circular member connected to a support so that its axis coincides with the pivot of the control lever. An electric detent coil i... | 09/22/1998 |
| 5746413 | Fluid metering valve A fluid metering valve adaptable for outputting a fixed volume of lubricating oil from a diesel engine into an engine fuel system includes a sleeve slidably disposed in a body and a piston valve slidably disposed within the sleeve. A spring resiliently bi... | 05/05/1998 |
| 5746056 | Overspeed control for a hydrostatic transmission An overspeed control for a hydrostatic transmission of a mobile machine includes a speed control valve arrangement connected to a fixed displacement pump through a supply line and to a pressure responsive displacement controller of a variable displacement... | 05/05/1998 |
| 5709083 | Hydraulic swing motor deceleration control A hydraulic deceleration control for a hydraulic motor includes a pilot operated control valve for controlling fluid flow through a pair of motor lines connected to the opposite sides of the hydraulic motor. A valve device is disposed to communicate a sou... | 01/20/1998 |
