JPS5490752A - Safety circuit for side clamp - Google Patents
Safety circuit for side clampInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100089704A1 (en) * | 2008-10-09 | 2010-04-15 | Cascade Corporation | Equalized hydraulic clamp force control |
-
1977
- 1977-12-27 JP JP16064377A patent/JPS5490752A/en active Pending
Cited By (5)
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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