公开(公告)号：US12085180B2

公开(公告)日：2024-09-10

申请号：US18010210

申请日：2021-12-16

申请人： MITSUBA Corporation

发明人： Hiroki Saito ,  Yusuke Fujita ,  Hiroshi Ooka ,  Masahiko Tsuchida

IPC分类号： F16K7/00 ,  F16K17/04 ,  F16K27/02 ,  F04C14/24

CPC分类号： F16K17/04 ,  F16K27/0209 ,  F04C14/24

摘要： The invention suppresses hysteresis. A relief valve switching between whether to discharge oil through movement of a valve body includes: a first spacing part, in which the valve body moves; a second space part, connected with the first space part and having a diameter smaller than a diameter of the first space part; an elastic body, connected with the valve body; a seal part, disposed in a circumferential direction of the valve body; and a third space part, formed in the first space part.

公开(公告)号：US20240035469A1

公开(公告)日：2024-02-01

申请号：US18224471

申请日：2023-07-20

申请人： Pump Technology Solutions PS GmbH

发明人： Martin Heilig

IPC分类号： F04C14/24 ,  F04C15/06 ,  F04C2/344

CPC分类号： F04C14/24 ,  F04C15/06 ,  F04C2/344 ,  F04C2270/185

摘要： Apparatus for regulating delivery volume of a displacement pump comprises a displaceable regulating piston and a spring element acting on the regulating piston in a displacement direction (x) thereof. The apparatus further comprises a means for applying a force to the regulating piston against an effective direction (a) of the spring element.

公开(公告)号：US11840422B2

公开(公告)日：2023-12-12

申请号：US16636838

申请日：2018-08-20

申请人： MACNAUGHT PTY LTD

发明人： Marco Uccellani ,  Prabhjot Singh

IPC分类号： B65H75/44 ,  F04C2/10 ,  F04C14/24 ,  F04C14/04 ,  A62B1/12

CPC分类号： B65H75/4442 ,  F04C2/10 ,  F04C2/102 ,  F04C14/24 ,  A62B1/12 ,  B65H2403/7252 ,  F04C14/04 ,  F04C2210/206 ,  F04C2240/60 ,  F04C2240/605 ,  F04C2270/205

摘要： A braking system for a hose or cable reel including a housing configured to fit inside a drum of the reel and to rotate with the drum during use, and a gerotor including inner and outer gears disposed inside the housing, wherein the inner gear is attachable to a shaft of the reel and the outer gear is configured to rotate relative to the inner gear with the housing during use thereby causing hydraulic fluid to be pumped through the gerotor and impede rotation of the drum.

公开(公告)号：US11656003B2

公开(公告)日：2023-05-23

申请号：US16814487

申请日：2020-03-10

申请人： Emerson Climate Technologies, Inc.

发明人： James W. McBean ,  Robert C. Stover

IPC分类号： F04C18/02 ,  F04C29/04 ,  F04C14/24 ,  F04C14/26 ,  F04C28/24 ,  F04C28/28 ,  F04C29/12 ,  F25B1/04 ,  F25B31/02 ,  F25B41/20

CPC分类号： F25B1/04 ,  F04C14/24 ,  F04C14/26 ,  F04C18/02 ,  F04C18/0207 ,  F04C18/0269 ,  F04C28/24 ,  F04C28/28 ,  F04C29/04 ,  F04C29/12 ,  F25B31/026 ,  F25B41/20

摘要： A compressor includes a shell, first and second scroll members, a fitting assembly and a valve assembly. The first scroll member includes a first end plate having a first spiral wrap extending therefrom. The second scroll member includes a second end plate having a second spiral wrap extending therefrom and an injection passage formed in the second end plate. The second spiral wrap is meshingly engaged with the first spiral wrap to form compression pockets. The injection passage is in fluid communication with the compression pockets. The fitting assembly is in fluid communication with the injection passage. The valve assembly coupled to one of the second scroll member and the fitting assembly and movable between a closed position in which fluid communication between the compression pockets and the suction chamber is prevented and an open position in which fluid communication between the compression pockets and the suction chamber is allowed.

公开(公告)号：US11493037B1

公开(公告)日：2022-11-08

申请号：US17034910

申请日：2020-09-28

申请人： Laverne Schumann

发明人： Laverne Schumann

IPC分类号： F04C2/20 ,  F04C15/00 ,  F04C14/24 ,  F04C15/06 ,  F01M1/02 ,  F04C13/00

摘要： One embodiment of a modular pump includes a cover and a housing that may be engaged with one another during operation. A gearset may be positioned within an internal portion of the housing. If the modular pump is configured as a rotary pump, the gear set may be comprised of an inner gear positioned within a portion of a ring gear. The modular pump may include a spacer positioned between the cover and the housing to allow the modular pump to be configured with gear sets of varying axial dimensions.

公开(公告)号：US20220316473A1

公开(公告)日：2022-10-06

申请号：US17641530

申请日：2020-09-03

申请人： HITACHI ASTEMO, LTD.

发明人： Atsushi NAGANUMA

IPC分类号： F04C14/22 ,  F04C14/24

摘要： Discharge port (26) as arc-recessed discharge portion is formed by cutting on bottom surface (13a) of pump accommodating portion (13) of variable displacement pump. On mounting surface (1b) of housing body (1), first low pressure chamber (281) is formed at position overlapping with discharge port (26) in radial direction of pump structure (14) formed by driving shaft (3), rotor (4) and vanes (5) Drain hole (28b) communicating with low pressure portion located outside housing body (1) is formed on bottom surface (28a) of first low pressure chamber (281) along direction of rotation axis (O1) of pump structure (14). Low pressure portion has pressure that is hydraulic pressure of oil discharged from discharge port (26) or less. Oil from discharge port (26), having higher pressure than first low pressure chamber (281), flows into first low pressure chamber (281) by pressure difference between discharge port (26) and first low pressure chamber (281).

公开(公告)号：US20220235801A1

公开(公告)日：2022-07-28

申请号：US17586152

申请日：2022-01-27

申请人： Schwäbische Hüttenwerke Automotive GmbH

发明人： Stefan Küchle ,  Thomas Tontsch ,  Simone Schilling

IPC分类号： F15B13/042 ,  F04B49/00 ,  F04B49/08 ,  F04B49/24 ,  F04C14/24 ,  F16K11/07 ,  F16K17/10

摘要： A control valve for a pump for delivering a fluid. The control valve includes: a valve housing which delineates a piston chamber; a piston which can be moved within the piston chamber; and a fluid channel which ports into the piston chamber via a port opening, wherein the port opening defines a port control edge. The valve housing includes a recess which extends into the fluid channel, wherein the recess defines a recess control edge which is axially offset with respect to the port control edge, and/or the piston includes a piston recess which defines a piston recess control edge.

公开(公告)号：US11268508B2

公开(公告)日：2022-03-08

申请号：US16462473

申请日：2017-10-27

申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.

发明人： Shigeyuki Miyazawa

IPC分类号： F04C2/344 ,  F04C14/22 ,  F04C14/12 ,  F04C14/24 ,  F04C28/12

摘要： A variable displacement pump according to the present invention is notably configured such that the opening area of a variable metering orifice (MO) is variably controlled by a second control valve (6) as a spool valve having a second spool valve body (61). According to this type of the second control valve (6), a larger amount of movement (stroke movement) of the second spool valve body (61) can be ensured. Consequently, the opening area of the variable metering orifice (MO) can be controlled without being restricted by a range of variation in a proper discharge amount based on an amount of movement of a cam ring (2), thereby achieving sufficient energy conservation of the pump.

公开(公告)号：US11060520B2

公开(公告)日：2021-07-13

申请号：US15530770

申请日：2017-02-27

申请人： Joe Dick Rector

发明人： Richard Wallace Hibbard

IPC分类号： F01C1/18 ,  F03C2/00 ,  F03C4/00 ,  F04C2/00 ,  F04C2/12 ,  F04C2/08 ,  F04C14/24 ,  F04C15/00

摘要： A rotary, self-priming, positive displacement pump is described. The pump may include a pump housing including an inlet and an outlet, a pump chamber including an upper wall, a lateral wall, and a floor, first and second rotary impellers in the pump chamber, and a pair of gears each secured to the first and second rotary impellers, and a pressure relief feature operable to relieve pressure developing in a relatively high pressure zone of the pump chamber. The gears mesh with each other to ensure that the vanes do not contact one another during rotation. The pressure relief feature may comprise one or more channels formed in the pump housing and/or the first and second rotary impellers. The channels connect the high pressure zone with another zone to redistribute pressure. The channels may include one continuous channel or alternatively, a plurality of unconnected channels.

公开(公告)号：US11054026B2

公开(公告)日：2021-07-06

申请号：US16698566

申请日：2019-11-27

申请人： Project Phoenix, LLC

发明人： Thomas Afshari

IPC分类号： F16H61/4008 ,  F04C14/08 ,  F04C14/24 ,  F04C15/00 ,  F03C2/08 ,  F04C2/08 ,  F16H39/36 ,  F16H61/4035 ,  F16H61/44 ,  F16H61/465

摘要： A hydrostatic transmission system includes a hydraulic motor and at least one proportional control valve and at least one pump connected to the hydraulic motor to provide fluid to operate the hydraulic motor. The at least one pump includes at least one fluid driver having a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from the pump inlet to the pump outlet. The hydrostatic transmission system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover and concurrently establishes an opening of the at least one proportional control valve to adjust at least one of a flow and a pressure in the hydrostatic transmission system to an operational set point.