JPS5725570A - Prevention valve against sway back of inertia body - Google Patents
Prevention valve against sway back of inertia bodyInfo
- Publication number
- JPS5725570A JPS5725570A JP10023280A JP10023280A JPS5725570A JP S5725570 A JPS5725570 A JP S5725570A JP 10023280 A JP10023280 A JP 10023280A JP 10023280 A JP10023280 A JP 10023280A JP S5725570 A JPS5725570 A JP S5725570A
- Authority
- JP
- Japan
- Prior art keywords
- inertia
- poppet
- movable seat
- liquid
- oil pressure
- 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.)
- Granted
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
- Safety Valves (AREA)
Abstract
PURPOSE: To prevent the sway back of an inertia body in an inertia-body sway-back prevention valve provided in an inertia-body oil pressure control device such as an oil pressure shovel by delaying a movable seat to be returned after a poppet for reducing the liquid pressure in a main pipe line.
CONSTITUTION: For braking by an oil pressure motor, when the liquid at a primary port 54 is brought into a high pressure, a movable seat 41 is shifted to the left against springs 39 and 40 as it is pushed to a poppet 42 (to close a valve). Meanwhile, when the braking work is finished, the liquid pressure is dropped from just before the intermission of the oil pressure motor over to after intermission, and consequently, the movable seat 41 and the poppet 42 are shifted to the right (to be returned) by springs 39 and 40. At this stage, since the discharged liquid from a chamber 45 is throttled by a damping small hole 50, the poppet 42 is delayed after the movable seat 41, and consequently opens a valve. As the valve is opened, main pipe lines 8 and 5 are connected to drop the liquid pressure in the main pipe line 8, and the inertia-body reversing energy at the time of dashing between two bodies 22 and 20 can be extinguished for preventing the sway back of the inertia body.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10023280A JPS5725570A (en) | 1980-07-21 | 1980-07-21 | Prevention valve against sway back of inertia body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10023280A JPS5725570A (en) | 1980-07-21 | 1980-07-21 | Prevention valve against sway back of inertia body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5725570A true JPS5725570A (en) | 1982-02-10 |
| JPH0258481B2 JPH0258481B2 (en) | 1990-12-07 |
Family
ID=14268519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10023280A Granted JPS5725570A (en) | 1980-07-21 | 1980-07-21 | Prevention valve against sway back of inertia body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5725570A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58178504U (en) * | 1982-05-24 | 1983-11-29 | 株式会社ナブコ | swing back prevention valve |
| WO1991015636A1 (en) * | 1990-04-02 | 1991-10-17 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system in civil engineering-construction machine |
| EP0603421A1 (en) * | 1992-07-14 | 1994-06-29 | Hitachi Construction Machinery Co., Ltd. | Inertial body driving unit |
| US5862665A (en) * | 1994-12-08 | 1999-01-26 | Komatsu Ltd. | Apparatus for preventing reverse rotation for hydraulic actuator |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2519300Y2 (en) * | 1990-01-12 | 1996-12-04 | 株式会社ニューギン | Pachinko machine |
| DE19833489A1 (en) * | 1998-07-24 | 2000-01-27 | Mannesmann Rexroth Ag | Hydraulic circuit for controlling user of work apparatus has pump supplying user with pressure medium via feed conduit with back flow conduit feeding back to tank |
| JP4610116B2 (en) * | 2001-03-29 | 2011-01-12 | 東芝機械株式会社 | Valve device |
-
1980
- 1980-07-21 JP JP10023280A patent/JPS5725570A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58178504U (en) * | 1982-05-24 | 1983-11-29 | 株式会社ナブコ | swing back prevention valve |
| WO1991015636A1 (en) * | 1990-04-02 | 1991-10-17 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system in civil engineering-construction machine |
| US5285643A (en) * | 1990-04-02 | 1994-02-15 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system for civil-engineering and construction machine |
| EP0603421A1 (en) * | 1992-07-14 | 1994-06-29 | Hitachi Construction Machinery Co., Ltd. | Inertial body driving unit |
| EP0603421A4 (en) * | 1992-07-14 | 1994-08-31 | Hitachi Construction Machinery Co., Ltd. | |
| US5419132A (en) * | 1992-07-14 | 1995-05-30 | Hitachi Construction Machinery Co., Ltd. | Inertial body drive mechanism |
| US5862665A (en) * | 1994-12-08 | 1999-01-26 | Komatsu Ltd. | Apparatus for preventing reverse rotation for hydraulic actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0258481B2 (en) | 1990-12-07 |
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