JPH02129389U - - Google Patents
Info
- Publication number
- JPH02129389U JPH02129389U JP4234990U JP4234990U JPH02129389U JP H02129389 U JPH02129389 U JP H02129389U JP 4234990 U JP4234990 U JP 4234990U JP 4234990 U JP4234990 U JP 4234990U JP H02129389 U JPH02129389 U JP H02129389U
- Authority
- JP
- Japan
- Prior art keywords
- ram
- tank
- release screw
- port
- supplied
- 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
- 239000010720 hydraulic oil Substances 0.000 claims 2
Landscapes
- Types And Forms Of Lifts (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Description
図面第１〜３図は従来の油圧ジヤツキを示すも
ので、第１図は一部切欠側面図、第２図はその平
面図、第３図はリリーズスクリユウ部分の拡大断
面図、第４図はこの考案の実施例を示すリリーズ
スクリユウの先端部分の拡大断面図である。
２……ポンプ、５……タンク、１０……ポート
、１３……リリーズスクリユウ、１３ａ……テー
パ部、１３ｂ……胴部、１３ｃ……段差部、１５
……シート面、１５ａ……盛上がり部。
Figures 1 to 3 of the drawings show a conventional hydraulic jack. Figure 1 is a partially cutaway side view, Figure 2 is a plan view, Figure 3 is an enlarged sectional view of the release screw, and Figure 4. FIG. 2 is an enlarged sectional view of the tip of the release screw showing an embodiment of this invention. 2... Pump, 5... Tank, 10... Port, 13... Release screw, 13a... Taper part, 13b... Body part, 13c... Step part, 15
... Sheet surface, 15a ... Raised portion.
Claims (1)
給するとともに、リリーズスクリユウを解除する
ことでラム内とタンクとを接続するポートを開き
、ラム内の作動油をポートを介してタンク内に返
戻させる油圧ジヤツキにおいて、前記リリーズス
クリユウの胴部先端にテーパ部を形成し、テーパ
部と胴部との間に段差部を形成し、当該段差部で
前記リリーズスクリユウのシート面を押圧成形し
て盛上がり部を形成するとともに、この盛上がり
部とテーパ部との間にオリフイス又はチヨークを
形成したことを特徴とする油圧ジヤツキ。 The hydraulic oil in the tank is supplied to the ram via the pump, and by releasing the release screw, the port that connects the inside of the ram and the tank is opened, and the hydraulic oil in the ram is supplied to the tank via the port. In the hydraulic jack for returning, a tapered part is formed at the tip of the body of the release screw, a stepped part is formed between the tapered part and the body, and the seat surface of the release screw is press-formed at the stepped part. 1. A hydraulic jack characterized in that a raised part is formed, and an orifice or a choke is formed between the raised part and the tapered part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990042349U JPH0515520Y2 (en) | 1990-04-20 | 1990-04-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990042349U JPH0515520Y2 (en) | 1990-04-20 | 1990-04-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02129389U true JPH02129389U (en) | 1990-10-25 |
| JPH0515520Y2 JPH0515520Y2 (en) | 1993-04-23 |
Family
ID=31553819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990042349U Expired - Lifetime JPH0515520Y2 (en) | 1990-04-20 | 1990-04-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0515520Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5582293U (en) * | 1978-11-30 | 1980-06-06 |
-
1990
- 1990-04-20 JP JP1990042349U patent/JPH0515520Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5582293U (en) * | 1978-11-30 | 1980-06-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0515520Y2 (en) | 1993-04-23 |