公开(公告)号：US12078164B2

公开(公告)日：2024-09-03

申请号：US17997855

申请日：2021-04-23

Applicant: NUOVO PIGNONE TECNOLOGIE SRL

Inventor： Manjunatha M. Chandrashekar

IPC: F04B53/00 ,  F04B39/00 ,  F04B39/12 ,  F04B53/14 ,  F04B53/16

CPC classification number: F04B53/007 ,  F04B39/0005 ,  F04B39/0022 ,  F04B39/122 ,  F04B39/126 ,  F04B53/143 ,  F04B53/164

Abstract: The reciprocating compressor has a cylinder with a compression chamber where a piston can slide between a crank-side position and a head-side position; a piston rod is mechanically connected to the piston and during operation of the compressor, slides in a hole of the compression chamber; there is a small gap between the hole and the piston rod; in order to avoid leakage from this gap a jacket is arranged around the piston rod and is sealed on one side to the piston and on the other side to the cylinder at the gap.

公开(公告)号：US20240218865A1

公开(公告)日：2024-07-04

申请号：US18605254

申请日：2024-03-14

Applicant: Kerr Machine Co.

Inventor： Christopher Todd Barnett ,  Micheal Cole Thomas ,  Kelcy Jake Foster ,  Nicholas Son ,  John Keith

IPC: F04B39/12 ,  F04B1/0538 ,  F04B19/22 ,  F04B23/06 ,  F04B27/00 ,  F04B39/14 ,  F04B53/02 ,  F04B53/16 ,  F04B53/22 ,  F16J15/26

CPC classification number: F04B39/122 ,  F04B1/0538 ,  F04B19/22 ,  F04B27/00 ,  F04B39/121 ,  F04B53/164 ,  F16J15/26 ,  F04B23/06 ,  F04B39/14 ,  F04B53/02 ,  F04B53/22

Abstract: A fluid end assembly comprising a plurality of fluid end sections positioned in a side-by-side relationship. Each fluid end section comprises a housing having a bore formed therein for housing a reciprocating plunger. Fluid is prevented from leaking around the plunger by a packing seal assembly. The packing seal assembly comprises one and only one packing seal.

公开(公告)号：US11994125B2

公开(公告)日：2024-05-28

申请号：US17442097

申请日：2020-07-21

Applicant: SPM Oil & Gas Inc.

Inventor： Jeff Myers ,  John Steven Marquez, Jr. ,  Adalberto Cortes ,  Johnny E. DeLeon, II

IPC: F04B53/00 ,  F04B39/12 ,  F04B53/10 ,  F04B53/16

CPC classification number: F04B53/007 ,  F04B39/122 ,  F04B39/125 ,  F04B53/1032 ,  F04B53/16

Abstract: A fluid end of a reciprocating pump assembly includes a cylinder, a cover, and a valve stop. The cylinder has a fluid inlet, a fluid outlet, and an access side wall comprising an access wall inner surface that defines an access opening. The access opening provides access to an inner area of the cylinder and has an access opening axis. The cover is positioned in the access opening and forms a seal with the access wall inner surface along the access opening. The cover includes a cover axis coaxial with the access opening axis. The valve stop is positioned partially in the fluid inlet and includes a spring retainer and a column portion. The column portion includes a flange positioned between the cover and the access wall inner surface. The flange is in the shape of an arc.

公开(公告)号：US11988200B2

公开(公告)日：2024-05-21

申请号：US17473335

申请日：2021-09-13

Applicant: DONGGUAN XIANMA ELECTROMECHANICAL CO., LTD.

Inventor： Menglin Zou

IPC: F04B25/00 ,  F04B25/02 ,  F04B39/00 ,  F04B39/02 ,  F04B39/12 ,  F04B39/16 ,  F04B53/00 ,  F04B53/08 ,  F04B53/10 ,  F04B53/14 ,  F04B53/16 ,  F04B53/18 ,  F04B17/03 ,  F04B35/04 ,  F04B39/06

CPC classification number: F04B25/02 ,  F04B25/00 ,  F04B39/0005 ,  F04B39/02 ,  F04B39/0292 ,  F04B39/122 ,  F04B39/123 ,  F04B39/125 ,  F04B39/16 ,  F04B53/006 ,  F04B53/08 ,  F04B53/10 ,  F04B53/143 ,  F04B53/16 ,  F04B53/18 ,  F04B17/03 ,  F04B35/04 ,  F04B39/06 ,  F04B2205/05

Abstract: A compressor, which includes a cylinder block and a piston assembly arranged inside the cylinder block; the piston assembly includes a first piston, a second piston arranged inside the first piston, and a movable assembly connected to the first piston, and the movable assembly is configured to drive the first piston and the second piston to reciprocate; the cylinder block is provided with a first compression chamber that defines a space for the first piston to move up and down; the cylinder block is provided with a gas storage chamber for storing the gas after the first compression, and the gas storage chamber is connected to the first compression chamber; and the cylinder block is also provided with a second compression chamber that defines a space for the second piston to move up and down, and the second compression chamber is connected to the gas storage chamber.

公开(公告)号：US20190136840A1

公开(公告)日：2019-05-09

申请号：US16182581

申请日：2018-11-06

Applicant: S.P.M. Flow Control, Inc.

Inventor： Chandu Kumar ,  John S. Marquez ,  Bryan Wagner ,  Kourosh Momenkhani ,  Justin Rand Cummings

IPC: F04B19/22 ,  E21B33/068 ,  E21B43/26 ,  F04B39/12

CPC classification number: F04B19/22 ,  E21B33/068 ,  E21B43/26 ,  F04B1/0404 ,  F04B1/0421 ,  F04B1/053 ,  F04B1/0538 ,  F04B9/045 ,  F04B17/05 ,  F04B39/121 ,  F04B39/122 ,  F04B39/126 ,  F04B53/162 ,  F05B2230/90 ,  F05B2280/10721 ,  F05B2280/6011

Abstract: A reciprocating pump includes a frame for a power end, a skid support structure integrally formed at a base of the power end frame to provide proper support and rigidity for the pump power end, where the integral skid support structure has a plurality of struts forming a series of chambers.

公开(公告)号：US10036381B2

公开(公告)日：2018-07-31

申请号：US14852967

申请日：2015-09-14

Applicant: Westinghouse Air Brake Technologies Corporation

Inventor： Jeffrey Hritz ,  Matthew D. Mitsch

IPC: F04B39/00 ,  F04B53/00 ,  F04B25/00 ,  F04B39/12 ,  B61H13/00 ,  F04B39/10 ,  F04B53/14 ,  F16D125/06 ,  F16D125/08

CPC classification number: F04B53/008 ,  B61H13/00 ,  F04B25/00 ,  F04B39/0005 ,  F04B39/0094 ,  F04B39/10 ,  F04B39/122 ,  F04B39/125 ,  F04B53/14 ,  F16D2125/06 ,  F16D2125/08

Abstract: A piston assembly for reducing clearance volume in a reciprocating compressor for compensating for piston tilt and improving the volumetric efficiency of the compressor includes a piston located within a piston cylinder, the piston having a first end and a second end, a wrist pin associated with the first end of the piston, and a cylinder head/valve assembly associated with the second end of the piston, wherein at least a portion of the second end of the piston includes an angled portion. The piston having the angled portion can be used with oil free cylinders and trunk type pistons. The piston can also be used in a multiple stage, multiple cylinder compressor including a series of piston assemblies. A method of increasing the volumetric efficiency of a reciprocating compressor can also be achieved using the piston having an angled portion.

公开(公告)号：US10001116B2

公开(公告)日：2018-06-19

申请号：US15117721

申请日：2015-04-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Seigo Yanase

IPC: F25B1/00 ,  F04B35/04 ,  F04B39/00 ,  F04B39/12 ,  F25D11/00 ,  F25D23/00 ,  F25B31/02 ,  F04B39/02 ,  F25B1/02 ,  F25D17/06

CPC classification number: F04B35/04 ,  F04B39/00 ,  F04B39/0005 ,  F04B39/023 ,  F04B39/122 ,  F25B1/02 ,  F25B31/023 ,  F25D11/00 ,  F25D17/062 ,  F25D23/006 ,  F25D2317/0665 ,  F25D2500/02

Abstract: In a sealed compressor, electrically-operated element (104) and compressive element (106) driven by electrically-operated element (104) are housed in the inside of sealed container (102). Compressive element (106) includes shaft (126) formed of main shaft (136) and eccentric shaft (134), and cylinder block (128) having; bearing (144) which pivotally supports main shaft (136) of shaft (126); and cylinder (142). Further, the compressive element (106) includes piston (130) which is movable in the cylinder (142) in a reciprocating manner, and connecting portion (132) which connects eccentric shaft (134) and piston (130) to each other. Electrically-operated element (104) is formed of an outer-rotor-type motor which includes stator (150), and rotor (152) which is disposed coaxially with stator (150) so as to surround an outer periphery of stator (150). Further, non-sliding portion (146) is provided between main shaft (136) and bearing (144), and stator (150) is fixed to outer peripheral portion (162) of bearing (144) which corresponds to non-sliding portion (146).

公开(公告)号：US09964211B2

公开(公告)日：2018-05-08

申请号：US14420560

申请日：2014-02-20

Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA

Inventor： Isamu Yoshimura ,  Ryo Nomura ,  Hisao Wada ,  Ryuji Sakai

IPC: F16J1/09 ,  F04B27/08 ,  F04B1/12 ,  F04B1/22 ,  F04B53/14 ,  F03C1/28 ,  F04B39/12 ,  F01B3/00

CPC classification number: F16J1/09 ,  F01B3/007 ,  F03C1/0605 ,  F04B1/124 ,  F04B1/22 ,  F04B27/0878 ,  F04B39/122 ,  F04B53/14

Abstract: An end part of a piston on a front edge side is formed so as to have a crowning of a 1.2-order to 2.5-order curve where a length is 10% or more and 80% or less of a length of a cylindrical part and a height is 10% or more and 160% or less of a clearance. An end part of a cylinder block on a front edge side is formed so as to have a crowning of a 1.2-order to 2.5-order curve where a length is 8% or more and 60% or less of the length of a cylindrical part and a height is 12% or more and 125% or less of the clearance.

公开(公告)号：US09932971B2

公开(公告)日：2018-04-03

申请号：US14251018

申请日：2014-04-11

Applicant: Alfred Kärcher GmbH & Co. KG

Inventor： Thomas Hofer

IPC: F04B1/14 ,  F04B27/10 ,  F04B39/12

CPC classification number: F04B1/145 ,  F04B1/143 ,  F04B27/1081 ,  F04B39/122

Abstract: A piston pump for a high-pressure cleaning appliance is provided, which includes a plurality of pistons that are movable back and forth and each of which enters a pump chamber and is displaceably held at a piston guiding part. The piston guiding part has a supporting wall on which a plurality of guiding elements, each of which guides a piston, are disposed. In order to be able to produce the piston pump in a more cost-effective manner, it is proposed according to the invention that the supporting wall is curved.

公开(公告)号：US09840995B2

公开(公告)日：2017-12-12

申请号：US14609918

申请日：2015-01-30

Applicant: DENSO CORPORATION

Inventor： Masatoshi Kuroyanagi ,  Mamoru Urushizaki ,  Yasuaki Matsunaga

IPC: F04B19/22 ,  F02M59/10 ,  F02M59/48 ,  F04B39/12 ,  F04B39/14 ,  F04B7/04

CPC classification number: F02M59/102 ,  F02M59/48 ,  F04B7/04 ,  F04B19/22 ,  F04B39/121 ,  F04B39/122 ,  F04B39/127 ,  F04B39/14

Abstract: During a pressurization stroke of a high-pressure pump, a cylinder inner wall and a plunger receive a fuel pressure from the pressurization chamber. Meanwhile, an upper housing does not receive the fuel pressure from the pressurization chamber, so that its thickness can be made thin. A cylinder is comprised of a bottom portion, a cylindrical portion and a large-diameter cylindrical portion. When inserting the large-diameter cylindrical portion into a large engaging hole, the bottom portion and the cylindrical portion are not brought into contact with a lower housing. A high liquid-tightness between the bottom portion, the cylindrical portion and a small engaging hole can be ensured.