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公开(公告)号：US20240318674A1
公开(公告)日：2024-09-26
申请号：US18681547
申请日：2022-07-11
CPC分类号： F15B15/22 , F15B15/1428 , F15B15/1457
摘要： A rod for a piston and cylinder device has a rod spud having a spiral channel in an outer surface thereof. The spiral channel spirals around the rod spud in a longitudinal direction. The spiral channel provides a hydraulic fluid flow path between an internal volume of a barrel and an internal volume of a spud receiver of the piston and cylinder device when the rod spud is in the spud receiver. At least a portion of the spiral channel has a cross-sectional area that decreases continuously and gradually as the spiral channel spirals longitudinally away from a distal end of the rod spud. The spiral channel provides more controlled deceleration of the hydraulic cylinder rod until the end of the retraction stroke.
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公开(公告)号：US12066040B2
公开(公告)日：2024-08-20
申请号：US18249412
申请日：2020-10-19
发明人： Josef Bueter
CPC分类号： F15B15/224 , F15B15/1452 , F16J9/08 , F16J9/14
摘要： A working cylinder which has end-position damping. A piston ring passes over an axially offset pressure medium connection and encloses a pressure medium damping volume. The piston ring includes a ring joint which has a base section and a projection section. The piston ring is of sealing construction. The pressure medium flows out of the pressure medium damping volume via an axial transfer channel, which can be defined by an axial cylinder-tube groove or an axial piston-ring groove. Also, there is a damping piston ring, which is of sealing construction and which has an axial piston-ring groove.
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公开(公告)号：US11953101B2
公开(公告)日：2024-04-09
申请号：US17405681
申请日：2021-08-18
发明人： Riccardo Meldolesi , Anthony Perkins , Clive Lacy , Dustin Kramer
CPC分类号： F16K11/07 , F15B15/223 , F15B21/14 , F16K3/24 , F15B2211/7052 , F15B2211/755
摘要： A spool valve for controlling the flow of a fluid into a reciprocating piston cylinder. A spool is slideably inserted into an outer casing, the spool valve having a first and a second non-waisted end portions and having a waisted middle portion. The casing has an intake port and output port for fluids entering and exiting the casing. A first non-waisted end portion covers the intake port during a first valve-closed event as the spool slides in one direction within the casing. The waisted middle portion is sufficiently wide to uncover both the intake port and the output port during a valve-open event as the spool slides in one direction within the casing. A second non-waisted end portion covers the output port during a second valve-closed event as the spool slides in the same one direction within the casing.
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公开(公告)号：US11953033B2
公开(公告)日：2024-04-09
申请号：US17787675
申请日：2020-12-18
发明人： Josef Bueter
CPC分类号： F15B15/224 , F15B15/1452
摘要： A working cylinder has a cushioned end-stroke. The piston unit has a piston main part and a ring body. The exterior of the ring body receives a piston ring with a piston ring gap, and the ring opening of the ring body receives a guiding pin of the piston main part. A ring gap is formed between the ring body and the guiding pin, and the ring body has axial and radial play relative to the piston main part. The ring body has an axial ring surface on the piston main part side, and the piston main part has an axial counter ring surface on the ring body side opposite the axial ring surface. The piston unit is constructed so that during an inward movement into the cushioning zone, the piston ring passes axially over the pressure medium connection and the piston unit encloses a damping pressure medium volume. The piston unit is in a first operating state during an inward movement and a second operating state during an outward movement. In the first operating state, the axial ring surface and the axial counter ring surface lie against each other and define a seal plane the piston ring gap is configured for a throttled outflow of the damping pressure medium volume. In the second operating state, the axial ring surface and the axial counter ring surface have an axial gap for a pressure medium inflow.
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公开(公告)号：US20240060518A1
公开(公告)日：2024-02-22
申请号：US18260165
申请日：2021-12-28
发明人： Yuichi TAKAHASHI
CPC分类号： F15B15/22 , F15B15/1433 , F15B15/149 , F15B15/1457
摘要： The present invention includes: a cylinder; a piston that is inserted in the cylinder and partitions an interior of the cylinder into fluid chambers and; guides that support the piston and guide movement of the cylinder, the guides including a first internal flow passage and a second internal flow passage; and nozzles communicating with the fluid chambers, respectively, wherein a pipe to communicate with a fluid pressure source is configured to switch between the external pipes, a flow passage from the fluid pressure source to the nozzles includes a short-circuit flow passage that short-circuits a flow passage communicating with the fluid pressure source and a flow passage not communicating with the fluid pressure source, and this short-circuit flow passage is provided with a throttle unit that throttles a flow passage.
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公开(公告)号：US11867589B2
公开(公告)日：2024-01-09
申请号：US17346591
申请日：2021-06-14
申请人： Swagelok Company
IPC分类号： G01M3/02 , F15B21/10 , F15B15/14 , F15B15/22 , F15B13/02 , F16K37/00 , F15B15/20 , F15B19/00 , F16K3/12 , F15B20/00 , F15B11/064 , F16K31/12
CPC分类号： G01M3/02 , F15B13/024 , F15B13/027 , F15B15/1409 , F15B15/204 , F15B15/22 , F15B19/005 , F15B21/10 , F16K31/12 , F16K37/0041 , F15B11/064 , F15B20/005 , F15B2211/30505 , F15B2211/40507 , F15B2211/50518 , F15B2211/50545 , F15B2211/5151 , F15B2211/5153 , F15B2211/555 , F15B2211/632 , F15B2211/6306 , F15B2211/6309 , F15B2211/6313 , F15B2211/7052 , F15B2211/857 , F15B2211/864 , F15B2211/865 , F15B2211/8606 , F15B2211/87 , F15B2211/8855
摘要： In an exemplary method of monitoring performance of a fluid driven actuator for a valve, pressurized fluid is supplied through an actuator supply line to an inlet port of the actuator during a first time period to operate the actuator from a normal position to an actuated position. Pressure changes corresponding to a fluid flow condition in the actuator supply line are measured during the first time period, with the measured pressure changes defining a valve cycle pressure profile including a first inflection point corresponding to movement of the actuator from the normal position to the actuated position. The valve cycle pressure profile is analyzed to identify a non-compliant condition in at least one of the valve and the actuator. An output communicating the identified non-compliant condition is then generated.
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公开(公告)号：US11820495B2
公开(公告)日：2023-11-21
申请号：US17319722
申请日：2021-05-13
发明人： Sean Kerr , David Marles , Paul Gordon L'Allier
CPC分类号： B64C25/22 , B64C25/30 , F15B15/224
摘要： A single acting actuator for an aircraft landing gear assembly is disclosed having a piston mounted in a cavity and moveable relative to a housing between a retracted position and an extended position, the piston dividing the cavity into first and second pressure chambers. At least one of the pressure chambers is associated with first and second outlets, with the actuator being arranged such that, in respect of the relative movement in which the pressure chamber is the decreasing volume pressure chamber, in a first stage of the relative movement the first and second outlets are open thereby allowing actuator fluid to flow out of the pressure chamber through the first and second outlets and in a second stage of the relative movement the second outlet is open but the first outlet is closed, thereby acting to slow the relative movement of the piston with respect to the housing.
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公开(公告)号：US11506230B2
公开(公告)日：2022-11-22
申请号：US17262846
申请日：2019-07-25
申请人： Moog BV
IPC分类号： F15B15/22
摘要： An actuator including a housing, an actuator rod and a snubber assembly. The actuator has an axis, the housing has a first end and an aperture positioned at the first end of the housing, and the actuator rod extends through the aperture along the axis of the actuator. The snubber assembly is mounted at the first end of the housing, and includes one or more energy absorbing devices. The snubber assembly is positioned on the housing such that an axis of each of the one or more energy absorbing devices is offset relative to the axis of the actuator. The snubber assembly is configured such that the one or more energy absorbing devices provide bidirectional end-of-stroke damping.
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公开(公告)号：US20220288734A1
公开(公告)日：2022-09-15
申请号：US17636187
申请日：2020-08-13
申请人： KOSMEK LTD.
发明人： Gaku YOSHIMURA
摘要： A support rod (3) is inserted in a housing (1) so as to be movable in an up-down direction. An actuation chamber (21) is provided in a lower end portion of the housing (1). An output member (24) is moved upward by pressurized oil supplied to the actuation chamber (21). In the actuation chamber (21), to which pressurized oil is supplied, a release spring (33) is attached between a leading end wall (31) of the actuation chamber (21) and a flange portion (25a) provided to a base end portion of the output member (24). The release spring (33) biases the output member (24) downward.
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公开(公告)号：US20220213906A1
公开(公告)日：2022-07-07
申请号：US17522862
申请日：2021-11-09
发明人： Ravinder Padam , Roopak Sharma , Sanjeev Arora
摘要： A hydraulic actuator includes a body defining a bore having a first end surface, a second end surface, and a bore surface, and a piston slidable in the bore. The piston, bore surface and first end surface define a first chamber, and the piston, bore surface and second end surface define a second chamber. The body also defines an accumulator chamber and a fluid passage between the first chamber and the accumulator chamber. An accumulator is received in the accumulator chamber and a valve selectably opens and closes the fluid passage.
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