patentstorm.us

Vane air motor

Patent Number: 8439662
Publication Date: 2013-05-14
Inventor:

A vane air motor configured to prevent uneven wear of vanes is provided. The vane air motor has a cylindrical member having a rotor chamber (19) defined by a circular cylindrical inner peripheral surface (11), and a vaned rotor. A plurality of air discharge openings (50) are provided over a predetermined length range in the axial direction of the rotor chamber. Each pair of axially adjacent air discharge openings are spaced from each other and overlap each other as seen ...

Power take-off for compressors

Patent Number: 8439661
Publication Date: 2013-05-14
Inventors: ;

A power take-off for compressors, comprising: a first rotating element (2), predisposed to be connected on command to a motor (40); at least a second rotating element (3), kinematically connected to the first rotating element (2), which is predisposed to be connected to a first user (50); a torque limiter or clutch (4), interposed between the first rotating element (2) and the second rotating element ...

Screw compressor having a second meshing body with at least one projection non-uniformly arranged with respect to the other projections in circumferential direction

Patent Number: 8439660
Publication Date: 2013-05-14
Inventor:

A screw compressor comprises a first meshing body and a second meshing body. The first meshing body has plural helical flutes disposed around a first rotating shaft. The second meshing body has plural projections or lobes disposed around a second rotating shaft. At least one of the projections or lobes is arranged non-uniformly with respect to the other projections or lobes in a circumferential direction of the second rotating shaft. The plural helical flutes are arranged to be meshable ...

Eccentric screw pump with split stator

Patent Number: 8439659
Publication Date: 2013-05-14
Inventors: ;

An eccentric screw pump has a plurality of segments extending along an axis and together forming a tubular casing generally centered on the axis and a plurality of axially extending stator shells of elastic material together forming inside the casing a tubular stator having axially opposite ends each having centered on the axis a frustoconical end seal surface. The stator shells are separable from the casing segments. An intake housing has a connecting flange formed centered on the axis ...

Progressing cavity pump rubber reinforcement device for rotor alignment

Patent Number: 8439658
Publication Date: 2013-05-14
Inventor:

A progressing cavity pump assembly utilizes a reinforced upper section of the stator rubber helix. The pump stator is located at the end of a string of tubing. The reinforced upper section of the stator rubber helix is strong enough, whether reinforced by mechanical means or by strengthening the rubber matrix chemically, so as not to allow the passage of a stop located above or on the top of the pump rotor. The rotor is lowered on a string of rods until the stop above or on top of the rotor ...

Oil-free screw compressor

Patent Number: 8435020
Publication Date: 2013-05-07
Inventor:

A screw compressor (10) is provided with shaft seal sections (28, 41) located on opposite sides of a compression chamber (24) of a screw rotor (25), to prevent mixing of oil in bearings (27, 39, 40) into the compression chamber (24) and leakage of process gas from the compression chamber (24). A suction-opening return line (52) interconnects the shaft seal section (41) on the discharge side of the compression chamber (24) ...

Pump having modular shaft bearings and seals

Patent Number: 8430657
Publication Date: 2013-04-30
Inventors: ; ;

An external gear pump including seals, bearings, bushing/seal housings, choke collars and shafts that are all removable for maintenance and/or replacement without removing either endplate or internals from the case assembly. The preferred pump includes four bearing caps that can be removed without removing the pump from its mounted position. By removing the four bearing caps, access is gained inside the pump housing to all of the seals, bearings, bushing/seal housings, choke collars and ...

2 stage rotary compressor

Patent Number: 8430656
Publication Date: 2013-04-30
Inventors: ; ;

The present invention provides a 2 stage rotary compressor including a hermetic container (101), an electric motor (110) composed of an stator (111), a rotor (112) and a rotation axis (113), a low pressure compression assembly (120) including a low pressure cylinder (121), a high pressure compression (130) assembly including a high pressure cylinder (131), a middle plate (140) for separating the low pressure cylinder ...

Positive displacement flowmeter and helical gear

Patent Number: 8425212
Publication Date: 2013-04-23
Inventor:

Flowmeter with a pair of helical gears using an oval pitch curve as a reference rack tooth profile. The tooth height ratio of the reference rack tooth profile is π/4. The reference rack tooth profile is an oval pitch curve of two or less leaves. The moving radius of the oval pitch curve is expressed by ρ=a/(1−b cos nθ), where ρ is a moving radius which is a distance between the center of rotation and the oval pitch curve, “a” is a similarity factor, “b” is a degree of ...

Positive displacement machine according to the spiral principle

Patent Number: 8425211
Publication Date: 2013-04-23
Inventor:

In a positive displacement machine for compressible media, having a spiral-shaped feed chamber (11) arranged in a housing (7b) between cylinder walls (14, 15), a spiral-shaped displacement body is composed of a disc (2) with spiral-shaped strips (3). The strips (3) are held eccentrically with respect to the housing, in such a way that, during operation, each point of the strip performs a movement which is limited by the peripheral walls of ...

Two-setting variable-eccentricity vane pump

Patent Number: 8425210
Publication Date: 2013-04-23
Inventor:

A variable-eccentricity vane pump having a rotor fitted with blades; an adjusting ring housing the rotor; elastic means for forcing the adjusting ring into a maximum-eccentricity position with respect to the rotor; a first sliding member connected to the adjusting ring and which slides in fluidtight manner inside a first chamber connected hydraulically to a delivery conduit of the pump; and a second sliding member connected to the adjusting ring and which slides in fluidtight manner inside ...