Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7401541 | Servo-pneumatic actuator A positioning system includes an actuator, valve (preferably pneumatic), position sensor and an electronic valve controller, integrated in a single unit. Continuously variable setpoints are possible within the range of operation. A preferred control circuit includes... | 07/22/2008 |
| 7353743 | Multi-valve fluid operated cylinder positioning system A position control system is used for controlling a fluid operated cylinder having at least one fluid chamber defined by a piston located within a housing for movement between first and second end limits of travel. The system includes at least two electrically actua... | 04/08/2008 |
| 7347172 | Hydraulic valve actuation system with valve lash adjustment A hydraulic valve actuation system has a hydraulic actuator connected with a valve in an engine. The hydraulic actuator has a boost pin enclosing a drive pin in a casing. The drive pin connects with and defines a valve lash with a valve stem of the valve. The hydrau... | 03/25/2008 |
| 7213549 | Variable valve actuator Improved actuators and valve control systems, and methods for controlling actuators and/or engine valves, are disclosed. In addition to the inherent capability of timing control, the ability to provide continuous valve lift or stroke control greatly improves engine ... | 05/08/2007 |
| 7159639 | Diecasting machine A direct-acting type diecasting machine having an inexpensive and simplified hydraulic circuit is provided, which includes: a mold clamping cylinder for clamping and opening/closing a mold in a direct-acting manner; a single two-way hydraulic pump driven by a drivin... | 01/09/2007 |
| 7156058 | Variable valve actuator Actuators, and corresponding methods and systems for controlling such actuators, provide independent lift and timing control with minimum energy consumption, while supplying sufficient supplemental energy to overcome friction. In an exemplary embodiment, an actuatio... | 01/02/2007 |
| 7143682 | Large manipulator having a vibration damping capacity A large-size manipulator comprises a boom made up of several segments and arranged on a vehicle frame. The boom is foldable and has a slewing track ring rotated about a vertical axis of rotation. The boom segments can be swiveled with respect to each other and with ... | 12/05/2006 |
| 7114430 | Adaptive position determining system for hydraulic cylinder A position determining system may include a hydraulic cylinder and a flow control device operatively connected to the hydraulic cylinder. A controller may be configured to supply an actuating signal to the flow control device. The controller may be configured to mon... | 10/03/2006 |
| 7108324 | Vehicle seat adjuster A pneumatic seat adjuster for moving a vehicle seat relative to a floor of the vehicle includes a body having a bore formed therein. The body is adapted to be connected to one of a floor and a vehicle seat. A piston is slidably disposed in the bore of the body. The ... | 09/19/2006 |
| 7059126 | System for preventing swing wag for a work machine with a boom assembly A swing cushion system of a work machine includes a directional flow device having a directional control member, a control device coupled to the directional flow device that outputs a signal to the directional flow device to shift the directional control member to d... | 06/13/2006 |
| 7004224 | Diecasting machine A diecasting machine capable of realizing highly precise injection of molten metal at high-speed without using an accumulator is provided, which includes: an injection cylinder for loading molten metal into a mold cavity by injection; a single two-way hydraulic pump... | 02/28/2006 |
| 6994012 | Drive units and drive assemblies A threaded nipple (26) at the closed end of a linear hydraulic motor (12) is received within a recess (82) in a frame member (78). Single clamp members, or individual clamp members (88), have recesses (92) that receive lower... | 02/07/2006 |
| 6957603 | Modulated overpressure valve structure for fluid operated device A pressure releasing valve structure 36″ is provided for a fluid operated device 10. The device has an orifice 42 constructed and arranged to be in fluid communication with a pressure chamber C. The valve structure includes a body 49 ha... | 10/25/2005 |
| 6820355 | Hydraulic control circuit of boom cylinder in work machine A hydraulic control circuit of a boom cylinder for a work machine, which, when controlling the supply and discharge of pressurized oil with respect to a boom cylinder, improves fuel efficiency, work efficiency in combined operations, and work efficiency and operatio... | 11/23/2004 |
| 6776081 | Pneumatic actuator system A pneumatic actuator system is provided which includes one or more piston-cylinder type actuators (14) intended for crust breaking operations at electrolytic alumina reduction baths. Each actuator (14) includes a working piston (21), and a pisto... | 08/17/2004 |
| 6722257 | Workpiece high-speed pressurizing method and mechanism by using cylinder with cushioning mechanism At a step of pressurizing a workpiece after reducing a speed of a piston rod at an end of a forward stroke of the piston rod by restrictively allowing compressed air to flow out of an exhaust-side pressure chamber, operation of a rapid exhaust valve is triggered by ... | 04/20/2004 |
| 6510688 | Safety device for a moving system A safety device for a moving system with a drive in which a pneumatically operated piston, by linear movement in a cylinder, moves a transported object past a stationary part in at least one direction has the aim of generating a switching signal at every ... | 01/28/2003 |
| 6283008 | Shock-proof hydraulic cylinder The invention relates to a shockproof hydraulic cylinder that has a cylinder housing (1), in which a plunger (4) that is driven via a plunger shaft (10) is arranged to move axially, and optionally a hollow-cylinder damping plunger (11). Using different em... | 09/04/2001 |
| 6082243 | Fluid controlled switching unit A fluid controlled switching unit includes a valve block; a guide bore provided in the valve block; first and second work chambers provided in the valve block and spaced from one another; first and second cylinder bores provided in the valve body; and a p... | 07/04/2000 |
| 5950926 | Sprayer boom lock valve for sequencing unfolding steps The present invention relates to a sprayer boom lock valve for automating the setup sequence for sprayer operation from the transport position. The lock valve comprises a lever, spring biased toward a valve closing pin, and a cam secured on the secondary ... | 09/14/1999 |
| 5868216 | Hydraulic rack-and-pinion steering assembly For a hydraulic rack-and-pinion steering assembly for which a working piston is guided in a hydraulic cylinder which features an end limit stop by which, in an end position of the working piston, a path for the pressure agent supplied to the working pisto... | 02/09/1999 |
| 5826483 | Hydraulic heavy equipment In hydraulic heavy equipment, a working device has a boom, an arm and a bucket. An operating device has the same link structure as in the working device. By operating the working device, control valves are operated and the working device functions in a si... | 10/27/1998 |
| 5595148 | Hydraulic valve control device The invention relates to a freely activatable hydraulic valve control device for a stroke valve, which valve control device is arranged particularly in an internal-combustion engine. The stroke valve includes a valve stem and a first spring acting on the ... | 01/21/1997 |
| 5572918 | Multi-functional valve A hydraulic system having a high-pressure differential cylinder implemented as a servo actuator is hydraulically connected to a valve combination and an electro-hydraulic servo valve. The valve combination is a multi-functional valve including multiple in... | 11/12/1996 |
| 5471907 | Marine steering apparatus A fluid power apparatus is connected to a pressurized fluid supply and a conventional helm pump controlled by the helm of a vessel to shift the rudder. The apparatus comprises an actuator cylinder connectable to the rudder, and a servo cylinder and a main... | 12/05/1995 |
| 5349894 | Locking hydraulic actuator A method for locking a hydraulic actuator in a predetermined position and a locking hydraulic actuator are provided. The method includes the steps of supplying hydraulic fluid to a forward chamber in the hydraulic actuator, transferring the hydraulic flui... | 09/27/1994 |
| 5325762 | Fluid pressure operated piston engine assembly A fluid pressure operated piston engine assembly, such as a pump assembly, including a fluid pressure operated piston engine and a fluid valve for coupling fluid under pressure to alternative portions of the piston chamber of the piston engine. The fluid ... | 07/05/1994 |
| 5313871 | Hydraulic control system utilizing a plurality of branch passages with differing flow rates A hydraulic control system for controlling an actuator has a cylinder and a piston, and an oil pump. A first passage is communicated with the oil pump, and a second passage is communicated with the cylinder of the actuator. A plurality of branch passages ... | 05/24/1994 |
| 5311808 | Cylinder apparatus A cylinder apparatus capable of effectively restraining a loss of energy with a simple structure at a low cost. When a piston 16 of a main cylinder 11 cuts off a communication between a subchamber 20 and a supply/exhaust passage 32, a pressure of the subc... | 05/17/1994 |
| 5293809 | Method of limiting a contact force A force limiter for limiting the force with which two articles come into contact with each other, which force limiter comprises a control member (11) displaceable with respect to a holder (5), which member is pneumatically prestressed with a force which i... | 03/15/1994 |
| 5289756 | Marine steering apparatus A fluid power apparatus is connected to a pressurized fluid supply and a conventional helm pump controlled by the helm of a vessel to shift the rudder. The apparatus comprises an actuator cylinder connectable to the rudder, and a servo cylinder and a main... | 03/01/1994 |
| 5253575 | Cover driving system A drive system for a lid or a flap of a convertible car body in which the control effort for the drive system is reduced by configuring the working cylinder as a control valve which releases the lid or the like after unlocking of the lock for lifting by t... | 10/19/1993 |
| 5220861 | Actuator with neutral position return The mechanism has an actuator provided with a piston, a servo control valve which is actuated by electric input and output signals for supplying working fluid to the actuator and exhausting working fluid from the actuator, a slider which closes an oil pas... | 06/22/1993 |
| 5136928 | Service machine stopping apparatus for midget rotary power shovel A service machine stopping apparatus is provided for a midget rotary power shovel wherein an upper rotary member is rotatably disposed on a lower travelling member capable of self-travelling and a service machine is mounted onto the upper rotary member. T... | 08/11/1992 |
| 4996906 | Actuating assembly for hydraulic elevators An actuating assembly having a cylinder which receives a plunger defining a fluid restricting means along its lower end. A feed conduit delivers pressurized fluid through a fluid inlet and into the cylinder, which displaces the plunger out of the cylinder... | 03/05/1991 |
| 4981426 | Clamping mechanism in an injection molding machine A clamping mechanism which includes a cylinder and a piston. The diameter of the piston is less than the internal diameter of a rear chamber of the cylinder such that fluid flows around the piston when the piston moves from an open position to an intermed... | 01/01/1991 |
| 4958548 | Hydraulic drive mechanism A hydraulic drive mechanism for a punching or an embossing tool, with a double-acting drive hydrocylinder with differently large piston areas, the rapid feed operation, the working feed operation, as well as the rapid retraction operation being controllab... | 09/25/1990 |
| 4852663 | Hydraulic percussive machines The present invention is directed to a hydraulic percussive machine with a shuttle valve to control the flow of fluid to and from a drive chamber without timing lands on the piston and a seal between the drive and return chambers. This is made possible by... | 08/01/1989 |
| 4766802 | Small-sized engine operated by fluid Small-sized engine operated by an expanding gaseous fluid, which comprises a cylinder (18), a piston (20) and an inlet valve (38), the upper parts of the cylinder (18) and the piston (20) cooperating momentarily with a perforated (29) resilient membrane (... | 08/30/1988 |
| 4699223 | Method and device for percussion earth drilling In percussion drilling such as earth drilling, a hammer piston driven by pressure medium is axially reciprocally movable in a drill body to transfer impact energy to a drill shank connectable to a drill bit. The axial position of the drill shank in the dr... | 10/13/1987 |
