U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 5508049

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.

Newsletter  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.

 

Class 417/385 - With means to supply or vent pulsator fluid


Subclass of Class 417 - Pumps
Definition: Apparatus in which means is provided to supply additional
No. of patents: 45
Last issue date: 11/01/2011


1    
NumberTitleIssue Date
8047814Chemical liquid supplying apparatus
A chemical liquid supplying apparatus which can discharge chemical liquid with high accuracy is provided. The apparatus is used to discharge the chemical liquid in a chemical liquid tank from an application nozzle. The apparatus has a combined member formed integral...
11/01/2011
7168928Air driven hydraulic pump
An air driven hydraulic pump includes two opposed cylinders to either side of a center section. Two pneumatic pistons are slidable in the opposed cylinders and are coupled with one another by a common shaft extending through the center section. The pneumatic pistons...
01/30/2007
7090474Diaphragm pump with overfill limiter
A diaphragm pump which overcomes the problem of diaphragm failure due to overfill of the oil transfer chamber. An overfill preventive element in the form of a mechanical stop, a fully closed coil spring, or a valve system, or alternatives are provided. ...
08/15/2006
7004731Diaphragm pump having a gas venting surface
A scarred surface structure on the cover curvature of a diaphragm compressor is created by shot blasting. The scarred surface structure hinders the sealing effect between the cover curvature and the diaphragm and thereby counteracts the formation of gas cushions.
02/28/2006
6899530Diaphragm pump with a transfer chamber vent with a longitudinal notch on the piston cylinder
A diaphragm pump which overcomes the problem of diaphragm failure due to overfill of the oil transfer chamber and the inability to self-prime. A notch is provided in the upper portion of the surface of the cylinder so that air can be forced back to the reservoir. In...
05/31/2005
6846166Reciprocating diaphragm pump with degassing valves
In a reciprocating pump, drive power of a drive-power supply member is transmitted to a diaphragm within a diaphragm drive chamber via operating fluid. An operating-fluid-flow regulation chamber for regulating the flow of operating fluid is located between the drive...
01/25/2005
6767189Method for the control and regulation of the oil pressure-gas pressure relationship of diaphragm compressors
A method for the control and regulation of the oil pressure-gas pressure relationship of diaphragm compressors. The function of a diaphragm compressor is mainly dependent on a given minimum relationship of gas pressure and oil pressure. When this is undershot...
07/27/2004
6736611Aircraft fluid delivery device
An aircraft fluid delivery device (10) including a piston assembly (20), a pilot assembly (22), and a control assembly (24). The control assembly (24) includes non-contact proximity sensors (S1, S2) that sense the pos...
05/18/2004
6547537Air operated radial piston and diaphragm pump system
Three or more diaphragm pumps (12,14,16) are interconnected to sequentially receive an activation fluid from corresponding piston and cylinder pumps (18,20,22) synchronized by a control mechanism (24) which includes a distributor plate (42) with directive...
04/15/2003
6276907Hydraulically driven diaphragm pump
A diaphragm pump for pumping a fluid, such as paint, includes a diaphragm separating a first chamber for accommodating and dispensing the paint from a second chamber for accommodating a drive fluid, and a piston that reciprocates to drive the drive fluid ...
08/21/2001
6203289Hydraulic alternating volumetric pumping system
Pumping system for pumping fluids at low pressure comprising a pumping enclosure connected to a pipe 16 introducing the fluid to be pumped and a pipe 18 discharging the pumped fluid. The enclosure is connected to a pipe introducing a drive fluid and a red...
03/20/2001
6178951Direct injection fuel pump for engine with controlled ignition and injection system comprising same
An injection pump comprises several modules in a housing. Each module has a chamber supplying an injection circuit, separated by a deformable diaphragm from a compartment defined by a bore of the housing and by a reciprocating piston. The chamber is conne...
01/30/2001
6113361Intensified high-pressure common-rail supply pump
A fuel pump, a fuel-pressure intensifier sub-assembly and a method of producing intensified high-pressure fuel are disclosed. The pump has a metered fuel circuit, a plurality of low-pressure bores with low-pressure plungers disposed therein, an intensifie...
09/05/2000
6099269Absorption refrigeration system having a diaphragm pump and a hydraulic piston pump
A device for pumping an absorbent solution from the low pressure side of an absorption heat exchange system to the high pressure side of that system without relying on pressure from the low pressure side. The device preferably includes a diaphragm pump di...
08/08/2000
5860793Diaphragm metering pump with push to prime air bleeder valve
A new and improved diaphragm metering pump is provided with a modular removable drive assembly. The removable drive assembly provides rotation to an eccentric shaft within the pump and is disposed outside rotary bearings for the eccentric shaft and outsid...
01/19/1999
5730506Vibration damper for damping vibrations in a fluid in a slip-controlled hydraulic brake system of a vehicle system
A space-saving vibration damper that functions reliably for a long term. The vibration damper has a housing that includes at least one concave recess which is sealed by a disk-shaped diaphragm comprising a spring steel sheet. The diaphragm is connected by...
03/24/1998
5667368Diaphragm metering pump including improved leak detection diaphragm
A new and improved diaphragm metering pump is provided with a modular removable drive assembly. The removable drive assembly provides rotation to an eccentric shaft within the pump and is disposed outside rotary bearings for the eccentric shaft and outsid...
09/16/1997
5641270Durable high-precision magnetostrictive pump
A magnetostrictive pump is provided which makes use of a magnetostrictive element which, when an alternating magnetic field is applied to it, compresses a chamber containing a working fluid. A bellows located within the working fluid is repeatedly compres...
06/24/1997
5421710Fuel injection apparatus
A fuel injection apparatus which, when raising fuel of a low viscosity and a low lubricating ability such as gasoline or methanol to a high pressure by a fuel injection pump and injecting it into a combustion chamber of an internal combustion engine etc.,...
06/06/1995
5336320Fast response film coater
A film coater for applying a coating material to selected areas on a target substrate, such as a printed circuit board, having a vented dispenser body with a plunger moveable therein between an open and closed position. A flow of pressurized air which mov...
08/09/1994
5249932Apparatus for controlling diaphragm extension in a diaphragm metering pump
A diaphragm metering pump having control over diaphragm extension is described. A position sensor is incorporated in a diaphragm metering pump to indicate the relative position of the diaphragm during flexure. When excessive extension of the diaphragm is ...
10/05/1993
5165869Diaphragm pump
A piston-driven fluid pump including a drive chamber containing drive fluid and a drive diaphragm forming a wall of the drive chamber. The pump also includes a spill containment chamber disposed adjacent the drive chamber and containing drive fluid, with ...
11/24/1992
5145331Diaphragm pump
In a diaphragm or membrane pump, the diaphragm thereof is composed of two diaphragm disks arranged at an axial distance from one another and enclosing an interior space whose size is variable given damage to one of the diaphragm disks. Further, a signal g...
09/08/1992
5032063Precision fluid pump
Hydraulic fluid is replenished in a pulsator chamber of a fluid driven pulsator pump by having the power plunger in an upstanding bore with spaced seals. The power plunger is withdrawn upon each stroke vertically upward. As it is withdrawn past seals, any...
07/16/1991
4948349Pump and valve apparatus
A pump consists of a valve box in which a valve chamber inlet and outlet are each provided with a valve, and a reciprocating member in a cylinder that communicates with the valve chamber of the valve box to open the valves. A pressure action chamber is pr...
08/14/1990
4887984Marine transmission with fluid coupler
A fluid coupling is provided in a marine drive between the engine and the propulsion unit. The fluid coupling includes a fluid pump connected to the flywheel of the engine, and a turbine connected to an output shaft leading to the propulsiion unit. A seri...
12/19/1989
4865528Method and arrangement for starting an hydraulic diaphragm pump against load
In a diaphragm pump, which is provided with at least one diaphragm (1), which separates a delivery chamber (4) from a pressure chamber (5) filled with an hydraulic fluid and is clmaped at its edge between the pump body (2) and a pump cover (3), and with a...
09/12/1989
4828464Diaphragm pump device
In a diaphragm pump including a first chamber for liquid to be pumped separated from a second chamber for drive fluid by a diaphragm which is driven by a piston alternatively placing the drive fluid under pressure and releasing the pressure from the drive...
05/09/1989
4799355Brake actuation systems for vehicles
The present specification discloses a brake actuation system for a vehicle, which is applicable to both hydraulically or pneumatically operated/spring released brakes and spring operated/hydraulically or pneumatically released brakes. With such brakes it ...
01/24/1989
4789313Apparatus for and method of pumping output fluids such as abrasive liquids
A technique for pumping an output fluid, especially a particle-laden abrasive liquid. This technique utilizes an output pump and a drive pump which are interconnected through a common chamber containing a drive fluid, specifically water. The output pump i...
12/06/1988
4594057Injector pump
An injector pump for introducing metered amounts of fluid into a process line which pump typically is actuated by a gas powered timing relay. A diaphragm or other impermeable member mounted in the pump housing defining a pump chamber for the fluid to be p...
06/10/1986
4564340Device for regulating the pressure and feed volume of a diaphragm pump
A device for regulating in a practically loss-free manner the pressure and feed volume of a diaphragm pump which is constructed as a hydraulically activatable diplacement pump and is especially suited for feeding a viscous and abrasive or a solids-laden s...
01/14/1986
4560324Automatic purger for a hydraulically controlled double diaphragm pump
The automatic purger has an intermediate chamber (11) one of the walls of which is formed by an elastic diaphragm (10), termed front diaphragm, whereas the other wall is formed by a second elastic diaphragm (12), termed rear diaphragm. This chamber is con...
12/24/1985
4558567Continuously variable transmission
A continuously variable transmission (2) is constructed utilizing a constant displacement pump (4) of fixed fluid power stroke, rather than a variable displacement pump with a variable pump stroke. A fluid motor (14) is driven by the pump and has an outpu...
12/17/1985
4468222Intravenous liquid pumping system and method
Intravenous Fluid Pumping System having a controller and a pump controlled by the controller. The controller has a sealed chamber with a flexible membrane covering a portion thereof. An incompressible fluid is disposed in the chamber. A piston member is m...
08/28/1984
4463901Unit fuel injector having independently controlled timing and metering
A unit fuel injector assembly (2, 88) is disclosed for periodically injecting fuel of a variable quantity on a cycle to cycle basis as a function of the pressure of fuel supplied to the injector from a source of fuel (48) and at a variable time during eac...
08/07/1984
4436491Method of supplying hydraulic operating fluid in diaphragm type
In a diaphragm type pump, a minute amount of the operating fluid is supplied instantaneously from an oil reservoir to an operating chamber at the final stage of the suction stroke in a main cylinder, and an excessive amount of the operating fluid and/or b...
03/13/1984
4389163Pressure booster system for fluids
A pressure booster system for fluids using one or more injectors for delivering a relatively low pressure output flow of fluid. A fluid accumulator receives the output from one or more injectors. A detector reveals any fluid mass change in the accumulator...
06/21/1983
4350477Pneumatic pulsatile fluid pump
A portable pumping system for administering fluids intravenously to a patient. The system has a tube connected between the fluid source and the patient with one-way valves at each end of the tube to limit the flow to one direction. A middle portion of the...
09/21/1982
4250872Blood pulsating and/or pumping device
A continuous length of flexible polymeric tubing having a smooth fissureless inner surface throughout is provided with a region intermediate its ends which region has an inside diameter greater than the inside diameter of the remainder of said tubing and ...
02/17/1981
1    
 
Sign InRegister
Username  
Password   
forgot password?