GB2010399A - Cushioning Means for Hydraulic Cylinders - Google Patents

Cushioning Means for Hydraulic Cylinders

Info

Publication number
GB2010399A
GB2010399A GB7849036A GB7849036A GB2010399A GB 2010399 A GB2010399 A GB 2010399A GB 7849036 A GB7849036 A GB 7849036A GB 7849036 A GB7849036 A GB 7849036A GB 2010399 A GB2010399 A GB 2010399A
Authority
GB
United Kingdom
Prior art keywords
piston
cylinder
cushioning means
valve
extremity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB7849036A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BRADFORD CYLINDERS Ltd
Original Assignee
BRADFORD CYLINDERS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BRADFORD CYLINDERS Ltd filed Critical BRADFORD CYLINDERS Ltd
Priority to GB7849036A priority Critical patent/GB2010399A/en
Publication of GB2010399A publication Critical patent/GB2010399A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/223—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which completely seals the main fluid outlet as the piston approaches its end position

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Abstract

In a linear hydraulic cylinder with cushioning means to cushion the impact of the piston on the cylinder at each extremity of its stroke, each cushioning means comprises a cylindrical sealing element 16, 12 mounted on the piston rod 7 or on a rod 11 mounted on the piston 8, and urged away from the piston by a compression spring 17, 14. As the piston approaches one extremity of its stroke, one of the cylindrical sealing elements 16, 12 engages an annular sealing face 23, 22 in the cylinder wall and seals off the cylinder at the end of the cylinder which the piston is approaching. Fluid leaving the cylinder must then pass through a passage 19 and needle valve 20 (a passage 19 and valve 20 being provided at each end of the cylinder) and the rate of flow of fluid through the valve 20 controls the deceleration of the piston. <IMAGE>
GB7849036A 1977-12-20 1978-12-19 Cushioning Means for Hydraulic Cylinders Withdrawn GB2010399A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7849036A GB2010399A (en) 1977-12-20 1978-12-19 Cushioning Means for Hydraulic Cylinders

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB5302977 1977-12-20
GB7849036A GB2010399A (en) 1977-12-20 1978-12-19 Cushioning Means for Hydraulic Cylinders

Publications (1)

Publication Number Publication Date
GB2010399A true GB2010399A (en) 1979-06-27

Family

ID=26267180

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7849036A Withdrawn GB2010399A (en) 1977-12-20 1978-12-19 Cushioning Means for Hydraulic Cylinders

Country Status (1)

Country Link
GB (1) GB2010399A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513369A1 (en) * 1985-04-15 1986-10-16 Alten, Kurt, 3015 Wennigsen Hydraulic working cylinder
NL1018501C2 (en) * 2001-07-09 2003-01-10 Actuant Corp Hydraulic control device.
CN102108990A (en) * 2010-07-23 2011-06-29 三一重工股份有限公司 Hydraulic cylinder and related devices thereof, hydraulic buffer system, excavator and concrete pump truck
CN102155459A (en) * 2010-07-23 2011-08-17 三一重工股份有限公司 Hydraulic oil cylinder, hydraulic buffer system, excavator and concrete pump truck
CN102155462A (en) * 2010-07-23 2011-08-17 三一重工股份有限公司 Hydraulic oil cylinder and relevant device thereof, hydraulic buffer system, excavator and concrete pump truck
CN102155461A (en) * 2010-07-23 2011-08-17 三一重工股份有限公司 Hydraulic oil cylinder, hydraulic buffer system, excavator and concrete pump truck
CN102155460A (en) * 2010-07-23 2011-08-17 三一重工股份有限公司 Hydraulic oil cylinder and related devices of hydraulic oil cylinder, and hydraulic buffer system, excavator and concrete pump truck
CN113775609A (en) * 2021-10-08 2021-12-10 扬州旭欣气动液压设备有限公司 Overheating-prevention hydraulic oil cylinder with buffer structure

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513369A1 (en) * 1985-04-15 1986-10-16 Alten, Kurt, 3015 Wennigsen Hydraulic working cylinder
NL1018501C2 (en) * 2001-07-09 2003-01-10 Actuant Corp Hydraulic control device.
US6739235B2 (en) 2001-07-09 2004-05-25 Actuant Corporation Hydraulic control device
CN102108990A (en) * 2010-07-23 2011-06-29 三一重工股份有限公司 Hydraulic cylinder and related devices thereof, hydraulic buffer system, excavator and concrete pump truck
CN102155459A (en) * 2010-07-23 2011-08-17 三一重工股份有限公司 Hydraulic oil cylinder, hydraulic buffer system, excavator and concrete pump truck
CN102155462A (en) * 2010-07-23 2011-08-17 三一重工股份有限公司 Hydraulic oil cylinder and relevant device thereof, hydraulic buffer system, excavator and concrete pump truck
CN102155461A (en) * 2010-07-23 2011-08-17 三一重工股份有限公司 Hydraulic oil cylinder, hydraulic buffer system, excavator and concrete pump truck
CN102155460A (en) * 2010-07-23 2011-08-17 三一重工股份有限公司 Hydraulic oil cylinder and related devices of hydraulic oil cylinder, and hydraulic buffer system, excavator and concrete pump truck
CN102108990B (en) * 2010-07-23 2011-12-28 三一重工股份有限公司 Hydraulic cylinder and related devices thereof, hydraulic buffer system, excavator and concrete pump truck
CN102155461B (en) * 2010-07-23 2012-06-27 三一重工股份有限公司 Hydraulic oil cylinder, hydraulic buffer system, excavator and concrete pump truck
CN102155460B (en) * 2010-07-23 2012-07-04 三一重工股份有限公司 Hydraulic oil cylinder and related devices of hydraulic oil cylinder, and hydraulic buffer system, excavator and concrete pump truck
CN102155462B (en) * 2010-07-23 2012-07-11 三一重工股份有限公司 Hydraulic oil cylinder and relevant device thereof, hydraulic buffer system, excavator and concrete pump truck
CN102155459B (en) * 2010-07-23 2012-07-18 三一重工股份有限公司 Hydraulic oil cylinder, hydraulic buffer system, excavator and concrete pump truck
CN113775609A (en) * 2021-10-08 2021-12-10 扬州旭欣气动液压设备有限公司 Overheating-prevention hydraulic oil cylinder with buffer structure

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)