JPS55123002A - Hydraulic cylinder - Google Patents

Hydraulic cylinder

Info

Publication number
JPS55123002A
JPS55123002A JP2964979A JP2964979A JPS55123002A JP S55123002 A JPS55123002 A JP S55123002A JP 2964979 A JP2964979 A JP 2964979A JP 2964979 A JP2964979 A JP 2964979A JP S55123002 A JPS55123002 A JP S55123002A
Authority
JP
Japan
Prior art keywords
oil
piston
packing
shaped packing
pressurized
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
JP2964979A
Other languages
Japanese (ja)
Inventor
Yoshioki Nagai
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.)
Shinmaywa Industries Ltd
Original Assignee
Shin Meiva Industry 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 Shin Meiva Industry Ltd filed Critical Shin Meiva Industry Ltd
Priority to JP2964979A priority Critical patent/JPS55123002A/en
Publication of JPS55123002A publication Critical patent/JPS55123002A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To enable rapid expansion and slow retraction, by push-opening a U- shaped packing to cause a free flow in the expansion of a piston and using a choke hole to cause a limited flow in the retraction of the piston.
CONSTITUTION: When pressurized oil is introduced into an inlet/outlet opening 14, the pressurized oil hardly passes through a choke hole 16 but flows into an empty chamber 12 behind a U-shaped packing 13 through an oil passage 15. The oil reduces the cross section of the U-shaped packing 13 so that the oil freely flows on both the sides of the packing and enters into a cylinder barrel 2. As a result, a piston 3 is rapidly expanded by pressure in opposition to a spring 9. When the oil is drained through the inlet/outlet opening 14, the oil in the cylinder barrel 2 is pressurized by the tension of the spring 9 and the cross section of the U-shaped packing 13 is increased by the pressure of the oil and the packing comes into contact with an enlarged part 5 and a projecting part 11 to seal them up. As a result, the oil passes through the choke hole 16 and performs slow limited flowing to the opening 14 and the piston 3 is slowly retracted.
COPYRIGHT: (C)1980,JPO&Japio
JP2964979A 1979-03-13 1979-03-13 Hydraulic cylinder Pending JPS55123002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2964979A JPS55123002A (en) 1979-03-13 1979-03-13 Hydraulic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2964979A JPS55123002A (en) 1979-03-13 1979-03-13 Hydraulic cylinder

Publications (1)

Publication Number Publication Date
JPS55123002A true JPS55123002A (en) 1980-09-22

Family

ID=12281944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2964979A Pending JPS55123002A (en) 1979-03-13 1979-03-13 Hydraulic cylinder

Country Status (1)

Country Link
JP (1) JPS55123002A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6619182B2 (en) 2001-04-25 2003-09-16 Delaware Capital Formation, Inc. Flow control device
CN101863311A (en) * 2010-03-17 2010-10-20 长沙长泰机械股份有限公司 Pulp packet compressor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6619182B2 (en) 2001-04-25 2003-09-16 Delaware Capital Formation, Inc. Flow control device
CN101863311A (en) * 2010-03-17 2010-10-20 长沙长泰机械股份有限公司 Pulp packet compressor

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