JPS5490752A - Safety circuit for side clamp - Google Patents

Safety circuit for side clamp

Info

Publication number
JPS5490752A
JPS5490752A JP16064377A JP16064377A JPS5490752A JP S5490752 A JPS5490752 A JP S5490752A JP 16064377 A JP16064377 A JP 16064377A JP 16064377 A JP16064377 A JP 16064377A JP S5490752 A JPS5490752 A JP S5490752A
Authority
JP
Japan
Prior art keywords
oil pressure
clamping
pressure
passage
lifting oil
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.)
Pending
Application number
JP16064377A
Other languages
Japanese (ja)
Inventor
Yasuhiro Arai
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP16064377A priority Critical patent/JPS5490752A/en
Publication of JPS5490752A publication Critical patent/JPS5490752A/en
Pending legal-status Critical Current

Links

Landscapes

  • Forklifts And Lifting Vehicles (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To prevent clamping oil pressure from falling, by compensating the decrease in the clamping oil pressure by lifting oil pressure when the lifting oil pressure is higher than the clamping oil pressure.
CONSTITUTION: When the clamping oil pressure maintained by a first check valve is equal to a prescribed level at the end of clamping operation, a spool 22 remains moved left. At that time, a passage 23 for the lifting oil pressure is opened and this oil pressure is introduced into an equal pressure valve 26. When the clamping oil pressure is higher than the lifting oil pressure, the equal pressure valve is moved right and the clamping oil pressure introduced from a passage 28 is conducted to a branch pipe 20a through a passage 29 and drained to a move-down pipe 2. When the clamping oil pressure is lower than the lifting oil pressure, the equal pressure valve 26 is moved left to connect the passage 28 to the passage 23. Thereby, the lifting oil pressure is introduced into the clamping pipe 11. At that time, if the lifting oil pressure is higher than the prescribed level for the clamping oil pressure, the lifting oil pressure is reduced to the prescribed level by a maximum pressure control valve 33.
COPYRIGHT: (C)1979,JPO&Japio
JP16064377A 1977-12-27 1977-12-27 Safety circuit for side clamp Pending JPS5490752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16064377A JPS5490752A (en) 1977-12-27 1977-12-27 Safety circuit for side clamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16064377A JPS5490752A (en) 1977-12-27 1977-12-27 Safety circuit for side clamp

Publications (1)

Publication Number Publication Date
JPS5490752A true JPS5490752A (en) 1979-07-18

Family

ID=15719361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16064377A Pending JPS5490752A (en) 1977-12-27 1977-12-27 Safety circuit for side clamp

Country Status (1)

Country Link
JP (1) JPS5490752A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100089704A1 (en) * 2008-10-09 2010-04-15 Cascade Corporation Equalized hydraulic clamp force control

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100089704A1 (en) * 2008-10-09 2010-04-15 Cascade Corporation Equalized hydraulic clamp force control
JP2012505133A (en) * 2008-10-09 2012-03-01 カスケード コーポレーション Hydraulic clamping force equalization control
US9964428B2 (en) 2008-10-09 2018-05-08 Cascade Corporation Equalized hydraulic clamp force control
US10900825B2 (en) 2008-10-09 2021-01-26 Cascade Corporation Equalized hydraulic clamp force control
US11300441B2 (en) 2008-10-09 2022-04-12 Cascade Corporation Equalized hydraulic clamp force control

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