|
Match
|
Document |
Document Title |
|
|
8118579 |
Gear pump
A pump comprises a driving rotor and a driven rotor that are positioned in a housing such that, as the driving rotor and the driven rotor rotate, the teeth of the driving rotor and the teeth of the...
|
|
|
8011910 |
Low noise gear set for gear pump
A low noise gear set for use generally and preferably with a power plant having an engine driving a pump connected to a low pressure fluid source, generating high pressure fluid at an output. The...
|
|
|
7980836 |
Modular multi-rotor compressor and method of manufacture
A multi-rotor compressor and method of manufacturing is provided. The compressor includes a housing with a plurality of identical planet rotors. The planet rotors are equally spaced apart at a...
|
|
|
7862314 |
Screw compressor
A screw compressor rotatably accommodates, within a casing including a suction port and a delivery port, a pair of female and male rotors under the meshed state and compresses gas in the state...
|
|
|
7798794 |
Screw pump and screw rotor
A cross section of a tooth profile of a first screw rotor (17) perpendicular to the rotor axis includes a tooth top arc (A1B1), a tooth bottom arc (C1D1), a first curve (A1C1), and a second curve...
|
|
|
7794218 |
Roots type pump and fuel cell system
There is disclosed a Roots type pump in which two rotors are rotated synchronously in a pump chamber to compress fluid therein, wherein respective stop positions of the rotors in the pump chamber...
|
|
|
7779822 |
Intake assembly with integral resonators
An intake assembly, such as a supercharger assembly, is provided for an internal combustion engine. The intake assembly includes a housing having a wall defining an inlet passage through which...
|
|
|
7753665 |
Screw compressor for working pressures above 80 bar
On screw compressors for extremely high discharge pressures, e.g. for application in refrigeration systems operating with CO2 in a transcritical process, featuring two rotors, a male rotor and a...
|
|
|
7744356 |
Screw vacuum pump with male and female screw rotors having unequal leads
In a screw vacuum pump 30, equal lead screws each in the range of 1 to 4 leads are added on the discharge side of male and female screw rotors (4) and (5) having a continuously changing screw gear...
|
|
|
7722345 |
Screw compressor
In a screw compressor, a pair of rotors are located in a housing to be rotatable around their rotary axes to form in the housing a compression chamber in which gas sucked from a suction port of the...
|
|
|
7637726 |
Screw vacuum pump
A screw vacuum pump includes a gas working chamber formed by a male screw rotor and a female screw rotor respectively including unequal lead screws engaging each other and having a lead angle that...
|
|
|
7625191 |
Rotary displacement machines having rotors of asymmetrical profile
Rotary displacement machine having a housing and at least two twinned rotors of asymmetrical profile, the twinned rotors each made of a core on which projects a helicoidal thread which extends...
|
|
|
7618248 |
Screw compressor with intermediate plate
The invention relates to oil-flooded screw compressors having a male rotor and female rotor each featuring preferably a ratio of male-to-female rotor lobes of 4:6, 5:6 or 5:7. In order to decrease...
|
|
|
7594323 |
Methods for designing single-lobe and double-lobe rotors
The present invention provides methods for designing single-lobe or double-lobe rotors which enable a defined rotor and a conjugate rotor intermeshing and conjugating to each other and by...
|
|
|
7562450 |
Methods for designing single-lobe rotors
The present invention provides a method for designing single-lobe rotors of the present invention includes: curve portions of the of a curve E, an arc A, an arc B, an arc F, an arc C, an arc H, a...
|
|
|
7513761 |
Double screw compressor for supplying gas
A double-screw compressor for supplying gas, such as air, to a gas consumer, is provided. The double-screw compressor includes two interacting rotors for compressing the gas and a toothed gearing....
|
|
|
7484943 |
Screw pump with improved efficiency of drawing fluid
A screw pump includes a housing and a pair of intermeshing screw rotors. The housing has an inlet port and an outlet port. Each rotor has a first portion whose lead angle decreases. The first...
|
|
|
7338266 |
Screw pump and method of operating the same
A screw pump includes a pair of screw rotors (2a, 2b) having teeth which are held in mesh with each other for drawing and discharging a fluid by rotating the screw rotors (2a, 2b) synchronously in...
|
|
|
7255545 |
Double-lobe type rotor design process
A double-lobe type rotor design process includes a process for forming a defined rotor and a process for forming a conjugate rotor, wherein the defined rotor and the conjugate rotor intermesh and...
|
|
|
7232298 |
Screw compressor in which the trailing flanks of the lobes of at least one rotor body are beveled at an end surface of the rotor body near the outlet port
A helical screw rotor compressor is provided which includes a rotor housing that includes a barrel wall between two parallel end walls, an inlet port at a first end and an outlet port at a second...
|
|
|
7214036 |
Screw type vacuum pump
A screw vacuum pump which allows reduced power, lower inside gas temperature, and reduced discharging time. The pump has a pair of screw rotors rotatively engaged with each other in a pump casing...
|
|
|
7192262 |
Twin-shaft vacuum pump and method of forming same
A twin-shaft vacuum pump includes two shafts and two rotors supported on respective shafts and cooperating with each other for producing a pumping effect, with each rotor being formed of a...
|
|
|
7163387 |
Meshing helical rotors
A conjugate pair of intermeshing rotors include helical lobes having helical crests and intervening grooves and are adapted for rotation about parallel axes within a working space of a screw rotor...
|
|
|
7044724 |
Screw compressor and method of manufacturing rotors thereof
A screw compressor comprises a casing, and a male and a female rotor formed with axially twisted screw grooves and accommodated in the casing, the both rotors being rotated by timing gears fixed to...
|
|
|
7040870 |
Gear pump with gears having curved teeth and method of feeding elastomeric material
A gear pump and method for pumping elastomeric material having two gears with meshing herringbone gear teeth. Each of the gear teeth has helical side portions and a curved central portion which...
|
|
|
6779993 |
Rotor profile for screw compressors
A rotor profile for screw compressors is disclosed. The rotor profile is shown in a latitudinal cross-section taken along a line extending in a direction perpendicular to rotor axes, and is applied...
|
|
|
6769891 |
Rotary positive-displacement pump with meshing gear wheels without encapsulation, and gear wheel for such a positive-displacement pump
A rotary positive-displacement pump comprises two gear wheels which mesh with each other without encapsulation. Each gear wheel has a plurality of teeth with a profile which falls within a band of...
|
|
|
6769890 |
Gas rotary screw compressor
A gas rotary screw compressor (1), in particular, for cooling gas suitable for low-power systems, the compressor having a casing (1a) having an intake conduit (6) and a delivery conduit (7); and...
|
|
|
6719548 |
Twin screw rotor device
A screw rotor device has a housing with an inlet port and an outlet port and at least one pair of rotors. The rotors each have an identical number of threads (N), a buttress thread profile with a...
|
|
|
6702558 |
Twin screw rotors and displacement machines containing the same
The twin screw rotors for axis-parallel installation in displacement machines for compressible media have asymmetrical transverse profiles and numbers of wraps that are ≧2. Depending upon the w...
|
|
|
6701220 |
Industrial robot device
An industrial robot including a manipulator having a control system. The manipulator includes a common gear housing having first and second inner compartments connected with a passage channel....
|
|
|
6692243 |
Screw compression flow guide for discharge loss reduction
A screw compressor includes a housing having a discharge port; and at least two rotors disposed in the housing for generating opposed discharge flows through the discharge port, wherein the...
|
|
|
6652250 |
Screw compressor having intermediate shaft bearing
A screw compressor 1 comprises a screw compressor body 2 having a pair of female and male screw rotors 21 meshed with each other encased in a rotor casing 22, and a motor casing 4 having a motor 3...
|
|
|
6588207 |
Step-less, hydraulic power transmission
The step-less hydraulic power transmission of the present invention comprises essentially two gear pumps including a first pump that is reversible and continuously variable, in which the per...
|
|
|
6554593 |
Dry screw vaccum pump having nitrogen injection
A dry vacuum pump assembly that includes a casting having an inner chamber, an inlet and an outlet communicating with the inner chamber, a pair of right and left handed screw rotors positioned in...
|
|
|
6447276 |
Twin screw rotors for installation in displacement machines for compressible media
Displacement machines for compressible media having single-threaded, twin screw rotors with continuously decreasing pitch to achieve an inner compression are known. The demand for compact pumps...
|
|
|
6422847 |
Screw rotor tip with a reverse curve
A rotor for a screw rotor machine includes a shaft and a plurality of lobes disposed on the shaft, each of the lobes extending radially outward from the shaft and having a tip surface, a rear...
|
|
|
6386848 |
Screw rotors and screw machine
In screw rotors (21, 22) which are each provided with a screw tooth (211, 221) having a spiral addendum surface portion (211a, 221a) and a deddendum surface portion (211c, 221c), and are used as a...
|
|
|
6371744 |
Dry screw vacuum pump having spheroidal graphite cast iron rotors
A dry vacuum pump that includes a casting having an inner cylinder communicating with an inlet and an outlet of the pump, shafts supported by the casting, spiral toothed parts formed on the shaft a...
|
|
|
6368091 |
Screw rotor for vacuum pumps
The moment Mo of unbalanced forces Fr of a screw rotor A1 is reduced by adjusting the number of thread leads of a threaded portion 2 of the screw rotor A1 to (an integer +0.5). The amount of...
|
|
|
6361289 |
Medical gear pump for suctioning and rinsing
A medical gear pump is used for suction and irrigation, in particular for endoscopy or the laboratory, and it has two meshing gears as conveying elements, one of which is joined to a drive...
|
|
|
6328546 |
Screw compressor with adjustable full-load capacity
A screw-compressor of which the full-load capacity can be adjusted without changing the shape, number of components and basic dimensions of the compressor, wherein the outer circumferential area of...
|
|
|
6296461 |
Plural screw positive displacement machines
Helical intermeshing main and gate rotors (1, 2) are mounted for rotation about their axes in respective intersecting bores in a housing. The profiles of the rotors as seen in cross section are...
|
|
|
6257855 |
Screw fluid machine
A screw rotor for use in screw compressors and screw vacuum pumps comprises a pair of rotors including a male rotor and a female rotor. These rotors have helical lobes in an axial direction and...
|
|
|
6244844 |
Fluid displacement apparatus with improved helical rotor structure
A fluid displacement apparatus includes a housing defining a chamber therein having a first port and a second port. First and second helical rotors with opposing pitches are meshed within the...
|
|
|
6193491 |
Rotors for screw compressor
The rotors for screw compressor include a male rotor and a female rotor. The cross-sectional profile of the male rotor is composed of four circular curves, curves generated by two circular curves...
|
|
|
6139299 |
Conjugate screw rotor profile
The point of tangency of the tip circle of the male rotor and the root circle of the female rotor is used as a starting point in generating the series of curves defining the male and female...
|
|
|
6129535 |
Twin feed screw
In known embodiments, media are fed in a contact-free manner in propeller pumps by single-thread twin feed screws which are guided via pilot gears, the twin feed screws having the same transverse...
|
|
|
6092994 |
Liquid delivery device, method of controlling such liquid delivery device, and liquid delivery pump
A screw pump includes a casing having inlet and outlet ports and a pump rotor rotatably mounted in the casing and having screw threads communicating with said inlet and outlet ports. The pump rotor...
|
|
|
6000920 |
Oil-flooded screw compressor with screw rotors having contact profiles in the shape of roulettes
Radial cross sections of a male screw rotor and a female screw rotor at a contact portion therebetween for transmitting power from the female rotor to the male rotor are profiled in the shape of...
|