Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 7562616 | Device for the emergency lowering of a load-carrying means for a stacker truck Device for the emergency lowering of a load carrying means for a stacker truck, in particular a reach-type forklift truck, with a valve arrangement accommodated in a valve block, via which the inflow and outflow of a hydraulic means is regulated to and from a lift c... | 07/21/2009 |
| 7441407 | Hydraulic drive control device A hydraulic drive control device which is capable of translating the effect of oil pressure loss reduction into the effect of fuel consumption reduction that is very real to the user. The hydraulic drive control device has (i) a driving hydraulic circuit for driving... | 10/28/2008 |
| 7156013 | Hydraulic cylinder comprising valves An energy cylinder for operating a valve of a turbine, in particular of a steam turbine, is disclosed, wherein a cylinder housing and a control block are combined into a common block. The latter has two diametrically arranged lateral surfaces on which a control valv... | 01/02/2007 |
| 6789589 | Bulk handling device operating coupling A controller for controlling the operation of gripping devices of a loader harvester bulk handling device. In the controller, the coupling of a valve with the operating device of the loader harvester's cross-cutting device, and with a tilting mechanism of a tilting ... | 09/14/2004 |
| 6253658 | Hydraulic control system The invention provides a hydraulic control system capable of preventing an objective from crashing even if a load supporting passage is fractured or the like during a crane operation for moving down the objective with a hydraulic shovel. When a pilot pres... | 07/03/2001 |
| 6220288 | Electrohydraulic control device An electro-hydraulic control device (10, 60) for a hydraulic servo motor for controlling a volume flow is proposed, which is embodied as a 4/2 valve module. A blocking valve in accordance with seat valve technology between a motor connection (B) and a ret... | 04/24/2001 |
| 6068013 | Counter balance valve In a counter balance valve, a valve body is provided with a valve bore having first and second pump-side ports, first and second motor-side ports and an auxiliary port. A spool is slidably fitted in the valve bore in a longitudinal direction thereof to es... | 05/30/2000 |
| 6050172 | Pneumatically operated mechanism A pneumatically operated mechanism for a glass machine comprises a piston and cylinder device, first and second air lines leading to opposite sides of the piston, and first and second control means for controlling the passage of air through the air lines,... | 04/18/2000 |
| 6035909 | Hydraulic drive for a feller-buncher An apparatus for felling and bunching trees is disclosed. The apparatus includes a front frame and a front axle supported by the front frame. The apparatus further includes a number of front wheels mounted on the front axle and a work tool supported by th... | 03/14/2000 |
| 5950519 | Hydraulic system with secondary exhaust passage A hydraulic system for working cylinders of construction equipment is disclosed. The system allows oil to be smoothly drained from a chamber of a working cylinder into an oil tank through a first passage or/and a second passage without being resisted duri... | 09/14/1999 |
| 5907991 | Quick drop valve control The present quick drop valve control provides both quick drop and float functions by moving a quick drop valve to a position interconnecting the drop and lift sides of a pair of lift cylinders when a directional control valve reaches a predefined position... | 06/01/1999 |
| 5857401 | Pneumatic mechanism A pneumatic circuit for use in causing rapid, upward movement of a piston and cylinder device in a glass machine incorporates a supplementary valve which connects an upper part of the cylinder to exhaust for part of the upstroke, and through a restrictor ... | 01/12/1999 |
| 5833209 | Device and method for influencing the periodic stroke movement of the closing element of a valve To influence the periodic stroke movement of the closing element of a valve, a control cylinder working on the closing element in the stroke direction is provided, which can be acted upon or released by a control element periodically with pressure medium.... | 11/10/1998 |
| 5794736 | Fluid control system for a vehicle power assisted steering mechanism A fluid control system (10) for a vehicle power steering mechanism having a manually driven steering member and a fluid driven driving member (16) operatively connected to steering means of the vehicle by which steerage of the vehicle is achieved, the con... | 08/18/1998 |
| 5701933 | Hydraulic control system having a bypass valve A hydraulic control system has a closed center control valve disposed to control flow of pressurized fluid from a pump to an actuator and a bypass valve disposed to control fluid flow through a bypass line connecting the pump to a reservoir. A controller ... | 12/30/1997 |
| 5615595 | Tandem cylinder control Tandem arranged cylinders having a common wall therebetween, with a common piston rod extending through said common wall, said rod carrying a piston for reciprocation within each said cylinder, and a valve member for fluid communication between said cylin... | 04/01/1997 |
| 5542864 | Steering cylinder for outboard engines The disclosure involves a hydraulic cylinder having an elongate interior chamber, a piston movable in the chamber, and a first fluid passage generally parallel to the chamber. In the improvement, the cylinder includes a second fluid passage generally para... | 08/06/1996 |
| 5195418 | Hydraulic control system for weighting and two-way valve therefor A motion control system for hydraulically operated lifting devices. The system provides for the dynamic weighing of a loaded container by controllably directing hydraulic flow through a bypass chamber of a two-way valve. An analog output signal is generat... | 03/23/1993 |
| 5076140 | Method and system for hydraulically positioning and impact load cushioning of a workpiece A hydraulic positioning means is provided which includes means for selectively allowing or prohibiting the flow of the first hydraulic fluid under the operating pressure. It also includes means in the hydraulic positioning means for selectively positionin... | 12/31/1991 |
| 5076144 | Poppet valve device A poppet valve device according to the present invention is adapted to sequentially operate a plurality of poppet valves the switching operation of a pilot valve, for example, an electromagnetic solenoid or the like which operates in response to an extern... | 12/31/1991 |
| 5036933 | Supplementary rear-wheel steering for motor vehicles In normal operation, a control or regulating device controls vehicle rear wheel steering in accordance with freely-selectable specifications. If a malfunction of the control or regulating device is detected, the latter becomes inoperative immediately. A p... | 08/06/1991 |
| 4753269 | Hydraulic latching apparatus for a control system A system for hydraulically detecting the seizure of a control valve in a hydraulic servo valve system wherein a hydraulic signal generated responsive to the control valve seizure is utilized to translate a bypass valve from its operational position to its... | 06/28/1988 |
| 4741249 | Automatic economizing device for compressed air Automatic device for economizing compressed air comprises a means for ensuring the passage of driving fluid under pressure during most of the stroke of the moving element of a user apparatus. The device consists of a single-unit body having a first circui... | 05/03/1988 |
| 4690035 | Emergency draining device for stopping pneumatic cylinders An emergency drain device for pneumatic cylinders which is integrated in an orientatable connection fixed directly to the cylinder body and comprises a valve which closes an orifice of the bolt of the connection, going to the atmosphere, when a control pr... | 09/01/1987 |
| 4672885 | Servo device for controlling flow in a hydraulic installation, particularly for the assisted steering of a vehicle The servo device for controlling flow (10) situated in a branch hydraulic line (6), incorporates in a body (11) an inlet passage (12) and an outlet passage (9) connected by an intermediate passage (13) forming a seat (14) for a valve component (15) which ... | 06/16/1987 |
| 4644657 | Speed-controlled apparatus for cutting and taking out blocks from a silo fodder bin Apparatus for cutting out blocks from a silo fodder bin has an hydraulically-driven, blade-carrying travelling gear travelling to and fro across a bridge and a conduit between hydraulic feed and return lines thereto such that the fluid flow through said c... | 02/24/1987 |
| 4640097 | Brake booster A brake booster having a constant pressure chamber and a variable pressure chamber formed respectively at both front and rear sides of a power piston within a housing, characterized in that a hollow expansion body expansible axially of the power piston is... | 02/03/1987 |
| 4640095 | Digital electro-hydraulic valve arrangement Electro-hydraulic valve arrangements are useful in controlling a displacement control member of a variable displacement pump or motor. However, previous digital electro-hydraulic valves having brief pulse widths required special high speed solenoids to sp... | 02/03/1987 |
| 4633757 | Brake booster A brake booster can switch operating mode from a positive-pressure mode using a signal-controlled fluid pressure supplier to a vacuum-pressure mode and vice versa. The booster includes a booster converter holding both an air valve and a vacuum valve of th... | 01/06/1987 |
| 4632158 | Power limiting hydraulic system The hydraulic system of this invention is for operating a tree processing implement on a work vehicle so that during a first part of an operating cycle the implement is supplied by two hydraulic pumps jointly, while during another part of the operating cy... | 12/30/1986 |
| 4625625 | Vehicle hydraulic systems In a vehicle hydraulic system of the open center kind, hydraulic fluid for operating vehicle services is circulated continuously, normally by an engine-driven pump. A closed center booster which requires a substantially constant pressure differential to o... | 12/02/1986 |
| 4581978 | Control system for pressure operated actuator A control system for a fluid pressure operated actuator includes an arming valve having open and closed positions and a pilot operated selector valve having a neutral position and an extend position. The arming valve is connected to a source of fluid and ... | 04/15/1986 |
| 4579038 | Depth control valve and system for agricultural implements Disclosed is a representative agricultural implement towed by a tractor equipped by a hydraulic power source connected to a lift mechanism for raising and lowering the implement frame so as to vary the ground-working depth of the working tools. The frame ... | 04/01/1986 |
| 4570672 | Hydraulic control valve with independently operable bypass valve A hydraulic sectional control valve includes separate pump pressure and function control spools. The spools may be actuated independently and sequentially to provide raising, holding and power down functions for earthmoving and construction vehicles. Addi... | 02/18/1986 |
| 4542678 | Control arrangement for hydraulic motor A control arrangement for a hydraulic motor has an adjustable pressure medium supply device with a container, an unblockable check valve with a control connection, a plurality of chambers including a supply chamber, a motor chamber, first and second retur... | 09/24/1985 |
| 4487106 | Fluid operated system Fluid control systems frequently eliminate use of fluid operated jack protecting relief valves because additional visibility blocking and damage prone conduits are required to connect the relief valves to the reservoir. A fluid operated system having a co... | 12/11/1984 |
| 4475710 | Electro-hydraulic control actuator for turbine valves In an electro-hydraulic control assembly for turbine valves, including a shaft for the turbine valve, a valve housing, electrical control means, an electro-hydraulic converter connected to the electrical control means, a hydraulic control cylinder being c... | 10/09/1984 |
| 4475440 | Power steering control apparatus An improved power steering control apparatus includes a power steering motor having a piston rod which extends through one end of the motor cylinder. This results in the rod end of the piston having a smaller working area than the head end of the piston. ... | 10/09/1984 |
| 4473128 | Vehicular power steering system In a vehicular power steering system, the hydraulic fluid supply to a hydraulic power actuator is controlled in accordance with the vehicle speed and the angular velocity of the steering wheel. Preferably, the fluid supply is reduced so that the steering ... | 09/25/1984 |
| 4439063 | Hydraulic control means A tunnel knife shield has a support frame, and a plurality of knife positioned side-by-side on the support frame. Each of the knives is associated with a double-acting hydraulic ram, the rams being used for advancing the knives, and for causing the suppor... | 03/27/1984 |
