JPS56164208A - Constant-velocity multistage cylinder device - Google Patents
Constant-velocity multistage cylinder deviceInfo
- Publication number
- JPS56164208A JPS56164208A JP6785380A JP6785380A JPS56164208A JP S56164208 A JPS56164208 A JP S56164208A JP 6785380 A JP6785380 A JP 6785380A JP 6785380 A JP6785380 A JP 6785380A JP S56164208 A JPS56164208 A JP S56164208A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- check valve
- opening
- intermediate cylinder
- opening device
- 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
- Actuator (AREA)
Abstract
PURPOSE: To enable automatic supply of oil for the cylinder device during the operation thereof by providing a valve-opening device which opens a check valve forcibly when an intermediate cylinder device lowers down to a prescribed position.
CONSTITUTION: The piston member 9 of the 1st intermediate cylinder 6 is provided with a communication orifice 24 communicating a space 11 witha space 15, while the check valve 25 and the valve-opening device 26 for opening the check valve 25 forcibly are provided in the communication orifice 24. The tip of the valve-opening device 26 which projects from the lower end of a valve seat 40 is set long enough to open the check valve 25 when it contacts with an end plate 1 and is pushed by thereby on the occasion that the intermediate cylinder 6 takes the lowermost position. Every time when the intermediate cylinder 6 takes the lowermost position, the check valve 25 is opened forcedly by the valve-opening device 26 through the intermediary of a groove 45 in the axial direction and thereby oil gets from a supply-discharge port 3 to the spaces 11, 15 and 12 through the check valve 25 found in the position of opening, thereby the oil pressure inside the cyliner device is made equal every part.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6785380A JPS56164208A (en) | 1980-05-23 | 1980-05-23 | Constant-velocity multistage cylinder device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6785380A JPS56164208A (en) | 1980-05-23 | 1980-05-23 | Constant-velocity multistage cylinder device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56164208A true JPS56164208A (en) | 1981-12-17 |
Family
ID=13356919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6785380A Pending JPS56164208A (en) | 1980-05-23 | 1980-05-23 | Constant-velocity multistage cylinder device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56164208A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009298590A (en) * | 2007-06-23 | 2009-12-24 | Herrmann Ag | Lift platform for vehicle and other object |
CN105298980A (en) * | 2015-10-12 | 2016-02-03 | 江苏恒立高压油缸股份有限公司 | Compact type high-reliability double-acting multistage cylinder |
CN108443264A (en) * | 2018-07-23 | 2018-08-24 | 江苏恒立液压股份有限公司 | Level Four oil cylinder |
-
1980
- 1980-05-23 JP JP6785380A patent/JPS56164208A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009298590A (en) * | 2007-06-23 | 2009-12-24 | Herrmann Ag | Lift platform for vehicle and other object |
US8684141B2 (en) | 2007-06-23 | 2014-04-01 | Herrmann Ag | Lifting platform for vehicles and other objects |
CN105298980A (en) * | 2015-10-12 | 2016-02-03 | 江苏恒立高压油缸股份有限公司 | Compact type high-reliability double-acting multistage cylinder |
CN108443264A (en) * | 2018-07-23 | 2018-08-24 | 江苏恒立液压股份有限公司 | Level Four oil cylinder |
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