WO2008021946A3 - Hydraulic cylinder with fatigue fuse - Google Patents

Hydraulic cylinder with fatigue fuse Download PDF

Info

Publication number
WO2008021946A3
WO2008021946A3 PCT/US2007/075566 US2007075566W WO2008021946A3 WO 2008021946 A3 WO2008021946 A3 WO 2008021946A3 US 2007075566 W US2007075566 W US 2007075566W WO 2008021946 A3 WO2008021946 A3 WO 2008021946A3
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
fatigue
fuse
hydraulic cylinder
wall
Prior art date
Application number
PCT/US2007/075566
Other languages
French (fr)
Other versions
WO2008021946A2 (en
Inventor
Bruce Knuth
Original Assignee
Actuant Corp
Bruce Knuth
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 Actuant Corp, Bruce Knuth filed Critical Actuant Corp
Priority to DE112007001903T priority Critical patent/DE112007001903T5/en
Publication of WO2008021946A2 publication Critical patent/WO2008021946A2/en
Publication of WO2008021946A3 publication Critical patent/WO2008021946A3/en

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
    • 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
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/007—Overload

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Safety Valves (AREA)
  • Fuses (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

A hydraulic cylinder has a fatigue fuse mounted directly at an opening in the wall of the cylinder. The fuse includes a fatigue element designed to yield before the cylinder reaches its fatigue limit. The fatigue element has a fatigue limit specified to be near, but less than the fatigue limit of the cylinder wall such that tripping of the fuse gives an indication, by a pop-out plunger, that the cylinder is nearly fatigued without catastrophic failure of the cylinder. The fuse maintains pressure temporarily following yielding of the fatigue member to maintain hydraulic power for the current lift. After pressure in the cylinder has been reduced sufficiently, a valve in the fuse will open to vent the cylinder and prevent its continued use.
PCT/US2007/075566 2006-08-11 2007-08-09 Hydraulic cylinder with fatigue fuse WO2008021946A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112007001903T DE112007001903T5 (en) 2006-08-11 2007-08-09 Hydraulic cylinder with fatigue protection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US82218606P 2006-08-11 2006-08-11
US60/822,186 2006-08-11

Publications (2)

Publication Number Publication Date
WO2008021946A2 WO2008021946A2 (en) 2008-02-21
WO2008021946A3 true WO2008021946A3 (en) 2008-12-11

Family

ID=39082954

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/075566 WO2008021946A2 (en) 2006-08-11 2007-08-09 Hydraulic cylinder with fatigue fuse

Country Status (2)

Country Link
DE (1) DE112007001903T5 (en)
WO (1) WO2008021946A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2938021A1 (en) * 2008-11-06 2010-05-07 Afhymat PROTECTIVE DEVICE FOR HYDRAULIC ACTUATOR
EP2643594B1 (en) 2010-11-28 2017-03-08 Harry Højvang Sørensen Pump for pumping liquid containing solid matter
US10845267B2 (en) 2018-12-10 2020-11-24 Efs International S.A. Fatigue fuse mounting systems and methods

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4703916A (en) * 1986-06-12 1987-11-03 Shinn Fu Corporation Hydraulic jack structural improvement in one-way hydraulic path in association with safety pressure relief network
US5542252A (en) * 1995-05-09 1996-08-06 Hung; Michael Safety valve structure for hydraulic jacks
US6347786B1 (en) * 2001-01-23 2002-02-19 Shinn Fu Corporation Hydraulic jack lifting mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821209A (en) 1953-01-23 1958-01-28 Waterman William Hydraulic fuses
US5107679A (en) 1991-03-25 1992-04-28 Mcneilus Truck And Manufacturing, Inc. Safety valve for discharge chutes on cement mixer
US5381822A (en) 1993-11-26 1995-01-17 Dana Corporation Relief valve with hydraulic fuse

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4703916A (en) * 1986-06-12 1987-11-03 Shinn Fu Corporation Hydraulic jack structural improvement in one-way hydraulic path in association with safety pressure relief network
US5542252A (en) * 1995-05-09 1996-08-06 Hung; Michael Safety valve structure for hydraulic jacks
US6347786B1 (en) * 2001-01-23 2002-02-19 Shinn Fu Corporation Hydraulic jack lifting mechanism

Also Published As

Publication number Publication date
DE112007001903T5 (en) 2009-07-23
WO2008021946A2 (en) 2008-02-21

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