Bizarre Patents
Pizza Pie With Concentric Rings of Crust
A pizza mold for forming a plurality of concentric raised ridges of dough (i.e., crust) on the surface of a pizza pie.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8037680 | Hydraulic control system for a swiveling construction machine A hydraulic control system for a swiveling construction machine includes at least one hydraulic travel motor, a first hydraulic actuation device, a second hydraulic actuation device and a hydraulic diverter valve assembly. The at least one hydraulic travel motor is ... | 10/18/2011 |
| 7895833 | Hydraulic drive apparatus A hydraulic drive system is mounted on a hydraulic excavator, and is provided with a directional control valve 23 for a boom, a directional control valve 24 for an arm, a boom control device 25 for selectively controlling the directional control... | 03/01/2011 |
| 7748215 | Anti-cavitation manifold for drive coupled, dual motor reversible hydraulic drive winding and unwinding systems An improved anti-cavitation hydraulic manifold for hydraulically coupling the hydraulic input and output of two, drive coupled, reversible hydraulic motors and a reversible source of hydraulic power for winding and unwinding systems is described wherein a stop confi... | 07/06/2010 |
| 7434394 | Hydraulic drive device To permit using hold-side pressure oil in a first hydraulic cylinder for the acceleration of a second hydraulic cylinder upon performing a combined operation of the first and second hydraulic cylinders, a hydraulic drive system is provided with a main hydraulic pump... | 10/14/2008 |
| 7357064 | Hydraulic control system for a mobile piece of equipment What is disclosed is a control arrangement for an equipment, in particular a wheel loader or a backhoe loader having a shovel mounted articulatedly at a boom, wherein the control arrangement enables a control of the shovel by means of a control pressure of a boom co... | 04/15/2008 |
| 7178334 | Hydrostatic vehicle drive system comprising a differential lock The invention relates to a hydrostatic vehicle drive system (1) comprising a first and a second hydraulic pump (2, 3), and a first and a second hydraulic motor (7, 12). Said hydraulic pumps (2, 3) and said hydraulic motors (7, 12) ... | 02/20/2007 |
| 7127888 | Hydraulic drive unit A hydraulic drive unit is provided with a boom cylinder, an arm cylinder, a communication line communicating a rod chamber of the boom cylinder and a bottom chamber of the arm cylinder with each other, and a switching valve arranged on the communication line for com... | 10/31/2006 |
| 7032378 | Flow divider system and valve device of the same There is provided a flow divider system in a hydraulic circuit for a work machine including a boom cylinder and a bucket cylinder. The flow divider system divides a pressured oil drained from a one-boom cylinder into an other-bucket cylinder and a tank via a first o... | 04/25/2006 |
| 7003948 | Hydrostatic transmission According to the present invention, an improved hydraulic transmission system is provided which includes a fluid supply adapted to supply a variable pressure hydraulic working fluid. Hydraulic users are connected to the fluid supply. A control is adapted to generate... | 02/28/2006 |
| 6898932 | Hydraulic driving unit A hydraulic driving unit is provided with a directional control valve 23 and directional control valve 24 for controlling a boom cylinder 6 and arm cylinder 7, both of which are driven by pressure oil delivered from a main hydraulic pump,... | 05/31/2005 |
| 6832806 | Hydraulic actuating device, in particular for a convertible-top assembly of a vehicle The present invention relates to a hydraulic actuating device for a device having a first and a second hydraulically moveable component. This actuating device comprises a first and a second hydraulic actuator, respectively, for moving the first and second moveable c... | 12/21/2004 |
| 6662556 | Hydraulic systems for a small loader A small self-propelled loader has hydraulic drive motors and at least one work cylinder, and has a hydraulic system that efficiently utilizes the available horse power from an internal combustion engine on the loader. The engine drives a tandem pump and t... | 12/16/2003 |
| 6659531 | Rebalancing circuit for a truck cover sliding pivot A hydraulic circuit comprises first and second cylinders, and a piston disposed in each of the cylinders. A pump communicates with one side of one of the pistons, and a pressure relief valve has a position wherein the pump communicates with another side o... | 12/09/2003 |
| 6502393 | Hydraulic system with cross function regeneration A regeneration method for a hydraulic system enables the fluid being forced from a first actuator to be used to power a second actuator. Often the force of the load acting on a hydraulic actuator is used to move the actuator into a given position which mo... | 01/07/2003 |
| 6330798 | Hydraulic system with shadow poppet valve A hydraulic valve assembly includes a pilot operated proportional poppet valve in which the main poppet moves in response to pressure in a first control chamber. The pressure in a first control chamber is governed by a pilot poppet and movement of the mai... | 12/18/2001 |
| 6241420 | Control system for a vibratory compactor A fluid control system (50) is provided for a work machine (10) having first and second compacting drums (14,16). First and second hydraulic motors (28,32) are connected in series and power first and second vibratory mechanisms (26,30) located within the ... | 06/05/2001 |
| 6134887 | Hydraulic control circuit for working members of earth-moving machines A hydraulic control circuit for, for example, working members of earth-moving machines such as backhoe loaders. A first and a second control section (9,10) are coupled to first and second linear hydraulic actuators (1,2; 3-8) through respective first a se... | 10/24/2000 |
| 6029446 | Multifunction valve stack A power machine has a base, an operator support portion, and a hydraulic slew motor coupled to move the operator support portion relative to the base. A boom, an arm, and a tool are all coupled to one another and to the operator support portion and are po... | 02/29/2000 |
| 6018895 | Valve stack in a mini-excavator directing fluid under pressure from multiple pumps to actuable elements A power machine includes a pair of traction motors to provide for travel of the machine. The power machine also includes a boom, an arm and a tool (such as a bucket). The power machine includes a hydraulic power circuit which has a valve stack that enable... | 02/01/2000 |
| 6016657 | Automotive hydraulic system and method A fluid supply system provides hydraulic fluid to a series combination of an automotive fan motor and a power steering unit. There is a bypass line around the fan motor for prioritizing the operation of the power steering unit. A normally closed pressure ... | 01/25/2000 |
| 6003313 | High pressure to low pressure exchange system for hydraulic drives A boom and drive train hydraulic system is described having a pressure source, preferably a pump operated by a motor, said pressure source providing hydraulic fluid at a high pressure to a first set of valves used to operate the drive train of the system.... | 12/21/1999 |
| 5960628 | Hydraulically powered fan and power steering in vehicle A hydraulic system for use in an automotive vehicle. A source of hydraulic pressure selectively operates in two modes. In one mode, it feeds a radiator cooling fan and a power steering system in parallel when a system pressure or flow exceeds a predetermi... | 10/05/1999 |
| 5946911 | Fluid control system for powering vehicle accessories A fluid control system for powering vehicle accessories includes a pump for generating a supply flow of hydraulic fluid, and a supply line for receiving the supply flow of hydraulic fluid. The system further includes a fan control circuit in fluid communi... | 09/07/1999 |
| 5819534 | Articulated aerial device with hydraulic upper boom compensation An aerial lift unit is truck mounted. The lift includes a lower boom pivoted to the truck and an upper boom pivotally connected to the outer end of the first boom. A lower boom cylinder unit is connected to pivot and thereby raise and lower the lower boom... | 10/13/1998 |
| 5797310 | Dual self level valve A self-leveling system controlling a boom (13) and a bucket (15) by double acting cylinders (17, 19). The system includes a self leveling valve assembly (27) including a first valve section (27a) including a flow divider spool (41) whereby flow from the r... | 08/25/1998 |
| 5687568 | Hydraulic motor system A hydraulic motor system minimizes wasted power by using a plurality of fixed displacement hydraulic motors to drive a drive shaft in a cooperative manner. The motors are selectively switched into operation in response to variations in fluid pressure. As ... | 11/18/1997 |
| 5669461 | Automotive hydraulic system and method A fluid supply system provides hydraulic fluid to a series combination of an automotive fan motor and a power steering unit. There is a bypass line around the fan motor for prioritizing the operation of the power steering unit. A normally closed pressure ... | 09/23/1997 |
| 5561978 | Hydraulic motor system A hydraulic motor system minimizes wasted power by using a plurality of fixed displacement hydraulic motors to drive a drive shaft in a cooperative manner. The motors are selectively switched into operation in response to variations in fluid pressure. As ... | 10/08/1996 |
| 5546751 | Anti-cavitation manifold for drive coupled, dual motor, reversible hydraulic drive systems An anti-cavitation hydraulic manifold for hydraulically coupling the hydraulic input and output of two, drive coupled, reversible hydraulic motors to a reversible source of hydraulic power is described which includes: (i) two high pressure hydraulic input... | 08/20/1996 |
| 5535845 | Automotive hydraulic system and method A fluid supply system provides hydraulic fluid to a series combination of an automotive fan motor and a power steering unit. There is a bypass line around the fan motor for prioritizing the operation of the power steering unit. A normally closed pressure ... | 07/16/1996 |
| 5471908 | Hydraulic system for backhoe Disclosed is a hydraulic system for a machine having a pump, a steering circuit and first and second hydraulic implements, e.g., a hydraulic loader and a backhoe, powered by first and second valve sections, respectively. In the improvement, the system inc... | 12/05/1995 |
| 5005654 | High torque hydraulic shoe bolt wrench A hydraulic shoe bolt wrench used to mount and remove shoe bolts which secure shoes to a track chain. The apparatus comprises a vertical cylinder stood upright on a frame moving on a work table, a main frame secured to a piston rod of the vertical cylinde... | 04/09/1991 |
| 4977928 | Load sensing hydraulic system Load sensing hydraulic systems conserve energy by generating only the fluid flow demanded by the system and at a pressure only slightly greater than the highest load pressure of the system. Optimizing the operating characteristics of the system for certai... | 12/18/1990 |
| 4958696 | Switching arrangement for the hydraulic drive means of a full-track vehicle In a switching arrangement for the hydraulic drive of a full-track vehicle, in which arrangement at least one drive motor is associated with each respective endless ground-engaging track at both sides of the longitudinal axis of the vehicle, there are pro... | 09/25/1990 |
| 4748891 | Hydraulic system A hydraulically operated rotational drive system, preferably for a Gatling cannon or gun, comprises a first hydraulic motor for the driving phase and sustenance of a predeterminate operating speed as well as for base load operation for the braking phase, ... | 06/07/1988 |
| 4649706 | Hydraulic feed control system for log debarkers A hydraulic feed control system for log debarkers having three infeed and three outfeed rolls. Each roll is driven by its own hydraulic motor. Each infeed motor is connected in series with a corresponding outfeed motor whereby three pairs of motors are de... | 03/17/1987 |
| 4522269 | Dual motor torque delivering tool A pneumatic power tool for tightening screw joints includes a primary motor 11 for a high speed running down sequence, a secondary motor 12 for a high torque final tightening sequence, a coupling gearing 18 providing a high ratio gearing for the secondary... | 06/11/1985 |
| 4458764 | Device in rock or earth drilling apparatus for rotary drilling A device in rock or earth drilling apparatus for rotary drilling including an axially stationary chuck (21) and an axially movable chuck (27) which is rotated by a reversible pressure fluid driven rotary motor (32) having a pressure fluid supply conduit f... | 07/10/1984 |
| 4414809 | Hydraulic power steering and cooling fan drive system for vehicles Power steering pump is employed to provide power for engine cooling fan drive. Bypass oil or bypass oil in addition to return oil is routed from the power steering gear through the fan drive motor for improved fan drive operation.... | 11/15/1983 |
| 4381731 | Hydraulic power system for a plurality of operating units in a poultry of livestock confinement house The hydraulic power system includes a single electrical motor for driving a fluid pump which supplies fluid under pressure to a plurality of series connected fluid motors, with the first motor in the series directly to the pump outlet and the last motor i... | 05/03/1983 |
