JPH0469961B2 - - Google Patents
Info
- Publication number
- JPH0469961B2 JPH0469961B2 JP13904882A JP13904882A JPH0469961B2 JP H0469961 B2 JPH0469961 B2 JP H0469961B2 JP 13904882 A JP13904882 A JP 13904882A JP 13904882 A JP13904882 A JP 13904882A JP H0469961 B2 JPH0469961 B2 JP H0469961B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- rod
- contact
- movable contact
- detection 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 30
- 230000007935 neutral effect Effects 0.000 claims description 11
- 230000008602 contraction Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lifting Devices For Agricultural Implements (AREA)
- Fluid-Pressure Circuits (AREA)
Description
【発明の詳細な説明】
この発明は、トラクタに連結された作業機の左
右方向の傾斜状態を検出する場合等に用いられる
油圧シリンダ等の伸縮状態検出装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an expansion/contraction state detection device for a hydraulic cylinder, etc., which is used for detecting the horizontal tilt state of a working machine connected to a tractor.
ロータリ耕耘機等の作業機を左右１対のロワリ
ンクおよびトツプリンクで構成されるリンク機構
を介して昇降可能並びに左右方向において傾斜可
能にトラクタに連結して使用することが多い。作
業機の左右方向における傾斜（ロータリグ）は、
リフトアームとロワリンクとを結ぶリフトロツド
として働く油圧シリンダの伸縮によつて調節され
るが、作業機をトラクタに対し左右方向に傾斜さ
せた状態のままで持ち上げようとすると動力伝達
部に無理な力がかかつて損傷事故や騒音発生の原
因となるので、回行時等に作業機を持ち上げる必
要があるときは、一旦作業機をトラクタと平行状
態に復帰させ、しかるのちリフトアームを操作し
て作業機を上昇させる必要があつた、。このよう
な操作を円滑に行なうためには、作業機が右上
り、左上り、中立状態のいずれの状態にあるかを
検出することのできる検出装置を設けておくのが
望ましく、この場合上記のような用途において
は、検出装置は苛酷な条件下で使用されるので、
できるだけ構造が簡単で耐久性にすぐれ、かつ複
雑な調整等を必要としないものである必要があ
る。 2. Description of the Related Art A working machine such as a rotary tiller is often connected to a tractor so that it can be moved up and down and tilted in the left and right directions via a link mechanism that includes a pair of left and right lower links and a top link. The inclination of the work equipment in the left and right direction (rotary rig) is
This is adjusted by expanding and contracting the hydraulic cylinder that acts as a lift rod that connects the lift arm and lower link, but if you try to lift the work equipment while it is tilted left and right with respect to the tractor, excessive force may be applied to the power transmission section. In order to prevent damage and noise, when it is necessary to lift the work equipment during turning, first return the work equipment to a parallel position with the tractor, and then operate the lift arm to lift the work equipment. It was necessary to raise the . In order to perform such operations smoothly, it is desirable to install a detection device that can detect whether the work equipment is in the right-up, left-up, or neutral state. In such applications, the detection device is used under harsh conditions, so
It is necessary that the structure is as simple as possible, has excellent durability, and does not require complicated adjustments.
この発明は上記事情に鑑みてなされたもので、
上記リフトアームとロワリンク間に介装される油
圧シリンダ等に取り付け、その伸縮状態を検出す
ることが可能であるような構造が簡単で耐久性に
すぐれた検出装置を提供するものである。 This invention was made in view of the above circumstances,
It is an object of the present invention to provide a detection device with a simple structure and excellent durability, which can be attached to a hydraulic cylinder or the like interposed between the lift arm and the lower link to detect its expansion and contraction state.
すなわち、本発明にかかる油圧シリンダ等の伸
縮状態検出装置は、シリンダ部１０と該シリンダ
部に往復動自在に挿入されたロツド部１１をそな
え、前記シリンダ部の側壁部には、第１の接触位
置Ａと第２接触位置Ｂおよびこれら両接触位置の
中間部に設けられた中立位置Ｎのいずれかに切り
換えらる可動接点部１４をそなえた３位置切換え
スイツチ１２が、前記ロツド部が当接しないとき
は一方の接触位置に可動接点部が位置するように
そのアクチユエータ１３をシリンダ部１０の内側
に臨ませた状態で取り付けられているとともに、
前記ロツド部はその先端部が前記３位置切換えス
イツチの可動接点部を中立位置に位置させる小径
部１１ａとして形成され、この小径部に隣接する
他の部分が前記３位置切換えスイツチの可動接点
部を他方の接触位置に位置させる大径部１１ｂと
して形成されていることを特徴としている。以
下、図面にあらわされた実施例について説明すれ
ば、第１図はトラクタ１にロータリ耕耘機２を連
結した状態をあらわす概略側面図、および第２図
は要部の背面図であつて、ロータリ耕耘機２は左
右１対のロワリンク３，３′およびトツプリンク
４によつてトラクタ１に連結されている。ロワリ
ンク３，３′の中間部はリフトロツド部５，５′に
よつて左右１対のリフトアーム６，６′に連結さ
れているが、一方のリフトロツド５′は油圧シリ
ンダ７によつて構成されている。油圧シリンダ７
には、第３図に示す如く本考案の１実施例である
検出装置９が並列に取り付けられている。すなわ
ち、油圧シリンダ７のシリンダ７ａ上端部がリフ
トアーム６′に、またピストンロツド部７ｂがロ
ワリンク３′にそれぞれ枢着されるとともに、検
出装置９のシリンダ部１０上端部が上記シリンダ
７ａの上端部付近に設けた取付け棒７ｃに取り付
けられ、また検出装置９のロツド部１１の下端部
がピストンロツド７ｂの下端部に突設した取付け
板７ｄにピン留めＰされている。 That is, the device for detecting the expansion/contraction state of a hydraulic cylinder or the like according to the present invention includes a cylinder portion 10 and a rod portion 11 inserted into the cylinder portion in a reciprocating manner, and a first contact is provided on a side wall portion of the cylinder portion. A three-position changeover switch 12 is provided with a movable contact section 14 that can be switched between position A, a second contact position B, and a neutral position N provided in the middle between these two contact positions, when the rod section comes into contact with it. When not in use, the actuator 13 is mounted so as to face inside the cylinder part 10 so that the movable contact part is located at one of the contact positions, and
The tip of the rod portion is formed as a small diameter portion 11a that positions the movable contact portion of the three-position changeover switch in a neutral position, and the other portion adjacent to this small diameter portion positions the movable contact portion of the three-position changeover switch. It is characterized by being formed as a large diameter portion 11b located at the other contact position. The embodiments shown in the drawings will be described below. FIG. 1 is a schematic side view showing a rotary power tiller 2 connected to a tractor 1, and FIG. 2 is a rear view of the main parts of the rotary tiller. The tiller 2 is connected to the tractor 1 by a pair of left and right lower links 3, 3' and a top link 4. The intermediate portions of the lower links 3, 3' are connected to a pair of left and right lift arms 6, 6' by lift rod parts 5, 5', and one lift rod 5' is constituted by a hydraulic cylinder 7. There is. Hydraulic cylinder 7
As shown in FIG. 3, detection devices 9, which are an embodiment of the present invention, are installed in parallel. That is, the upper end of the cylinder 7a of the hydraulic cylinder 7 is pivotally connected to the lift arm 6', the piston rod part 7b is pivotally connected to the lower link 3', and the upper end of the cylinder part 10 of the detection device 9 is near the upper end of the cylinder 7a. The lower end of the rod portion 11 of the detection device 9 is pinned to a mounting plate 7d protruding from the lower end of the piston rod 7b.
検出装置９のシリンダ部側壁部には、第４図に
示す如く３位置切換えスイツチ１２が取り付けら
れている。３位置切換えスイツチ１２は第１の接
触位置Ａ、第２の接触位置Ｂ、および両接触位置
Ａ，Ｂの間隔部である中立位置Ｎをそなえ、アク
チユエータ１３の前後動に応じて可動接点部１４
がいずれかの位置に位置するように構成されてい
る。上記アクチユエータ１３は押圧バネ１３ａに
よつて突出方向（図の左向き）に付勢されてい
る。上記３位置切換えスイツチ１２取付け部で
は、シリンダ部１０の側壁部が切欠かれて検出孔
１５となつている。この検出孔１５内部には、ア
クチユエータ１３によつて押圧され、アクチユエ
ータとともに前後動するボール１６が、シリンダ
部内部へ部分的に突出可能に保持されている。な
お、このボール１６のシリンダ部１０内側への完
全逸脱を防止するため、検出孔１５の内側口縁部
に小さな突起１７が設けられている。 A three-position changeover switch 12 is attached to the side wall of the cylinder portion of the detection device 9, as shown in FIG. The three-position changeover switch 12 has a first contact position A, a second contact position B, and a neutral position N that is a space between the two contact positions A and B.
is located in either position. The actuator 13 is biased in the projecting direction (leftward in the figure) by a pressing spring 13a. At the mounting portion of the three-position changeover switch 12, the side wall portion of the cylinder portion 10 is cut out to form a detection hole 15. A ball 16 that is pressed by the actuator 13 and moves back and forth together with the actuator is held inside the detection hole 15 so as to be able to partially protrude into the cylinder portion. In order to prevent the ball 16 from completely escaping into the cylinder portion 10, a small projection 17 is provided on the inner edge of the detection hole 15.
シリンダ部１０の内側へ往復動自在に嵌合する
ロツド部１１の外径は、シリンダ部内径に近い大
きさに形成されているが、その先端部には短い小
径部１１ａが設けられている。ロツド部１１の上
記小径部１１ａ以外の部分である大径部１１ｂが
前記検出孔１５開設部に位置するときは、ボール
１６が該大径部１１ｂによつて押し戻されるの
で、アクチユエータ１３が後退して、可動接点部
１４が第２の接触位置Ｂに移動し、固定接点C2
と接触する。ロツド部１１の小径部１１ａが検出
口１５開設部に位置するときは、ボール１６はロ
ツド部１１の径が小さくなつた分だけシリンダ部
１０の内側へ突出し、可動接点１４を中立状態に
保つ。また、ロツド部１１がシリンダ部１０の外
向きに移動し、検出孔１５開設部にロツド部１１
が存在しないときは、ボール１６が可能なかぎり
シリンダ部の内側へ突出するので、押圧バネ１３
ａによつて付勢されている可動接点１４が第１の
接触位置Ａに移動し、固定接点C1と接触する。
第４図の図示例ではロツド部１１の小径部１１ａ
が段状に形成されているが、第５図に示す如く斜
面状に形成しておいてもよい。 The outer diameter of the rod portion 11 that reciprocally fits inside the cylinder portion 10 is formed to be close to the inner diameter of the cylinder portion, but a short small diameter portion 11a is provided at the tip thereof. When the large diameter portion 11b of the rod portion 11 other than the small diameter portion 11a is located at the opening of the detection hole 15, the ball 16 is pushed back by the large diameter portion 11b, so the actuator 13 is moved back. Then, the movable contact portion 14 moves to the second contact position B, and the fixed contact C 2
come into contact with. When the small diameter portion 11a of the rod portion 11 is located at the open portion of the detection port 15, the ball 16 protrudes inward of the cylinder portion 10 by an amount corresponding to the reduced diameter of the rod portion 11, keeping the movable contact 14 in a neutral state. Further, the rod portion 11 moves outward of the cylinder portion 10, and the rod portion 11 is inserted into the open portion of the detection hole 15.
When the ball 16 does not exist, the ball 16 protrudes as much as possible inside the cylinder part, so the pressing spring 13
The movable contact 14, biased by a, moves to the first contact position A and comes into contact with the fixed contact C1 .
In the illustrated example of FIG. 4, the small diameter portion 11a of the rod portion 11 is
are formed in a stepped shape, but they may also be formed in a sloped shape as shown in FIG.
第６図は、上記検出装置９を用いて油圧シリン
ダ７の伸縮をコントロールする操作回路を例示す
るもので、作業機であるロータリグ耕耘機２がト
ラクタ１に対し平行状態に保持されているとき
は、ロツド部１１の小径部１１ａにボール１６が
当接するため、可動接点部１４が中立位置に保た
れ、油圧シリンダ７がその状態で保持される。油
圧シリンダ７が伸長した状態では、作業機は右下
りに保持されているが、この状態ではロツド部１
１が検出孔１５開口位置よりも外側に位置するの
で、可動接点部１４が第１の接触位置に位置して
いる。このため、この回路の電源スイツチSwを
ONにすると、油圧シリンダ７に油圧を供給する
ソレノイドバルブ２０が、油圧シリンダ７を収縮
させる方向に油圧を供給するように切り換えられ
る。逆に、油圧シリンダ７が収縮した状態では、
作業機が左下りに保持されているが、この状態で
はロツド部１１の大径部１１ｂがアクチユエータ
１３を押し込んでいるため可動接点部１４は第２
の接触位置Ｂに位置し、この状態でこの操作回路
が働くと、ソレノイドバルブ２０が油圧シリンダ
７を伸長させる方向に切り換えられるのである。
いずれの場合も検出装置９は油圧シリンダ７とと
もに伸縮するが、ロツド部１１の小径部１１ａに
ボール１６が当接する中立状態に達すると、油圧
シリンダ７の伸縮運動が停止する。なお、ボール
１６は必ずしも必要なものではなく、これを設け
ておくかわりにアクチユエータ１３の先端部を直
接シリンダ部１０の内部へ臨ませておいてもよい
が、このようなボール１６を設けておく方が動作
が円滑に行なわれ、かつ耐久性が向上するので有
利である。この場合ボール１６は３位置切換えス
イツチ１２のアクチユエータ１３の一部とみなす
ことができる。 FIG. 6 shows an example of an operation circuit that controls the expansion and contraction of the hydraulic cylinder 7 using the detection device 9. When the rotary tiller 2, which is a working machine, is held parallel to the tractor 1, Since the ball 16 comes into contact with the small diameter portion 11a of the rod portion 11, the movable contact portion 14 is maintained at the neutral position, and the hydraulic cylinder 7 is held in that state. When the hydraulic cylinder 7 is extended, the work equipment is held downward to the right, but in this state, the rod portion 1
1 is located outside the opening position of the detection hole 15, so the movable contact portion 14 is located at the first contact position. For this reason, the power switch Sw of this circuit is
When turned ON, the solenoid valve 20 that supplies hydraulic pressure to the hydraulic cylinder 7 is switched to supply hydraulic pressure in a direction that causes the hydraulic cylinder 7 to contract. Conversely, when the hydraulic cylinder 7 is contracted,
The work machine is held downward to the left, but in this state, the large diameter portion 11b of the rod portion 11 is pushing the actuator 13, so the movable contact portion 14 is in the second position.
When the operating circuit operates in this state, the solenoid valve 20 is switched in the direction of extending the hydraulic cylinder 7.
In either case, the detection device 9 expands and contracts together with the hydraulic cylinder 7, but when a neutral state is reached in which the ball 16 comes into contact with the small diameter portion 11a of the rod portion 11, the expansion and contraction movement of the hydraulic cylinder 7 stops. Note that the ball 16 is not necessarily necessary, and instead of providing it, the tip of the actuator 13 may be directly exposed to the inside of the cylinder portion 10; however, if such a ball 16 is provided, This is advantageous because it allows for smoother operation and improved durability. In this case, the ball 16 can be considered as part of the actuator 13 of the three-position switch 12.
第７図は、油圧シリンダ７のシリンダ７ａと検
出装置９のシリンダ部１０との連結部をあらわ
し、シリンダ７ａに溶接された取付け棒７ｃの先
端部に断面コ字形の接合具２１が取り付けられ、
これにシリンダ部１０の上端部に設けた長穴２２
付きの取付け片２３がボルト２４によつて締着さ
れている。この締着位置は長穴２２に沿つて上下
に調節することができる。このように、油圧シリ
ンダ７に対する検出装置９の取付け位置を調節可
能にしておけば、中立位置の調節が容易となるの
で実用上便利である。 FIG. 7 shows a connecting part between the cylinder 7a of the hydraulic cylinder 7 and the cylinder part 10 of the detection device 9, and a connecting tool 21 having a U-shaped cross section is attached to the tip of a mounting rod 7c welded to the cylinder 7a.
A long hole 22 provided at the upper end of the cylinder portion 10
An attached mounting piece 23 is fastened with a bolt 24. This fastening position can be adjusted up and down along the elongated hole 22. In this way, if the mounting position of the detection device 9 with respect to the hydraulic cylinder 7 is made adjustable, the neutral position can be easily adjusted, which is convenient in practice.
本発明にかかる検出装置は、主としてシリンダ
部１０とこれに嵌合するロツド部１１および１個
の３位置切換えスイツチ１２によつて構成される
ので、構造が簡単で製造コストも低くおさえるこ
とができる。このような検出装置として、２個の
リミツトスイツチを間隔をおいて並設し、ロツド
部に形成した一定長さの検出部がいずれか一方の
リミツトスイツチにのみ当接する状態、および両
方のリミツトスイツチに同時に当接する状態によ
つて左右の傾斜状態および中立状態を検出するよ
うに構成した装置が考えられるが、このような構
成では、２個のリミツトスイツチの位置関係の調
節が難しく、故障も生じやすい。また、ロツド部
とシリンダ部の嵌合にガタがある場合は検出精度
が低下するおそれもある。本発明にかかる検出装
置では、１個のスイツチしか使用しないので、調
節が容易であり、ロツド部とシリンダ部の嵌合に
多少のガタがあつても検出が不正確となるおそれ
は少ない。なお、アクチユエータによる感知部が
シリンダ部１０の内部に位置しているので、泥水
等異物の付着を防止することができるという利点
もある。 The detection device according to the present invention is mainly composed of a cylinder portion 10, a rod portion 11 that fits into the cylinder portion 10, and one three-position changeover switch 12, so that the structure is simple and the manufacturing cost can be kept low. . As such a detection device, two limit switches are arranged side by side at an interval, and a detection part of a certain length formed on the rod part contacts only one of the limit switches, and a state in which it contacts both limit switches at the same time. A device configured to detect the left/right tilted state and the neutral state depending on the contact state is conceivable, but with such a structure, it is difficult to adjust the positional relationship between the two limit switches, and failures are likely to occur. Further, if there is play in the fitting between the rod part and the cylinder part, there is a possibility that the detection accuracy will be reduced. Since the detection device according to the present invention uses only one switch, it is easy to adjust, and even if there is some looseness in the fitting between the rod portion and the cylinder portion, there is little risk of inaccurate detection. In addition, since the sensing part by the actuator is located inside the cylinder part 10, there is also an advantage that adhesion of foreign matter such as muddy water can be prevented.
第１図は作業機を連結したトラクタの概略側面
図、第２図は要部の背面図、第３図は要部の斜視
図、第４図は検出装置の断面図、第５図は異なる
実施例をあらわすロツド部の説明図、第６図は操
作回路図、第７図は検出装置取付け部の拡大図で
ある。図はいずれも実施例をあらわす。
１…トラクタ、２…ロータリ耕耘機、３，３′
…ロワリンク、４…トツプリンク、５…リフトロ
ツド部、６，６′…リフトアーム、７…油圧シリ
ンダ、９…検出装置、１０…シリンダ部、１１…
ロツド部、１１ａ…小径部、１１ｂ…大径部、１
２…３位置切換えスイツチ、１３…アクチユエー
タ、１４…可動接点部、１５…検出孔、１６…ボ
ール。
Figure 1 is a schematic side view of a tractor connected to a working machine, Figure 2 is a rear view of the main parts, Figure 3 is a perspective view of the main parts, Figure 4 is a sectional view of the detection device, and Figure 5 is different. FIG. 6 is an explanatory view of the rod portion showing the embodiment, FIG. 6 is an operating circuit diagram, and FIG. 7 is an enlarged view of the detection device mounting portion. All figures represent examples. 1...tractor, 2...rotary tiller, 3,3'
...Lower link, 4...Top link, 5...Lift rod part, 6, 6'...Lift arm, 7...Hydraulic cylinder, 9...Detection device, 10...Cylinder part, 11...
Rod part, 11a...Small diameter part, 11b...Large diameter part, 1
2... 3-position changeover switch, 13... actuator, 14... movable contact portion, 15... detection hole, 16... ball.
Claims (1)
入されたロツド部をそなえ、前記シリンダ部の側
壁部には、第１の接触位置と第２の接触位置およ
びこれら両接触位置の中間部に設けられた中立位
置のいずれかに切り換えられる可動接点部をそな
えた３位置切換えスイツチが、前記ロツド部が当
接しないときは一方の接触位置に可動接点部が位
置するようにそのアクチユエータをシリンダ部の
内側に臨ませた状態で取り付けられているととも
に、前記ロツド部はその先端部が前記３位置切換
えスイツチの可動接点部を中立位置に位置させる
小径部として形成され、この小径部に隣接する他
の部分が前記３位置切換えスイツチの可動接点部
を他方の接触位置に位置させる大径部として形成
されていることを特徴とする油圧シリンダ等の伸
縮状態検出装置。1 A cylinder part and a rod part inserted into the cylinder part so as to be able to reciprocate; A three-position changeover switch is equipped with a movable contact that can be switched to one of the neutral positions, and the actuator is moved to the cylinder so that the movable contact is located at one of the contact positions when the rod does not make contact. The rod part is attached so as to face inward, and the distal end of the rod part is formed as a small diameter part that positions the movable contact part of the three-position changeover switch in the neutral position, and the other adjacent to the small diameter part An expansion/contraction state detection device for a hydraulic cylinder or the like, characterized in that the portion is formed as a large diameter portion that positions the movable contact portion of the three-position changeover switch at the other contact position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13904882A JPS5929803A (en) | 1982-08-10 | 1982-08-10 | Expansion/contraction condition detector for hydraulic cylinder and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13904882A JPS5929803A (en) | 1982-08-10 | 1982-08-10 | Expansion/contraction condition detector for hydraulic cylinder and the like |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5929803A JPS5929803A (en) | 1984-02-17 |
| JPH0469961B2 true JPH0469961B2 (en) | 1992-11-09 |
Family
ID=15236246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13904882A Granted JPS5929803A (en) | 1982-08-10 | 1982-08-10 | Expansion/contraction condition detector for hydraulic cylinder and the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5929803A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6092710B2 (en) * | 2013-01-22 | 2017-03-08 | 株式会社コスメック | Cylinder device |
| WO2015145989A1 (en) | 2014-03-27 | 2015-10-01 | 日本電気株式会社 | Waveguide converter and waveguide conversion method |
| FR3045744B1 (en) * | 2015-12-16 | 2018-06-22 | Hydraulique Pb | DETECTION DEVICE |
| EP3419037B1 (en) * | 2017-06-22 | 2020-10-21 | HYDRAULIQUE PB (Société Anonyme) | Detection device |
-
1982
- 1982-08-10 JP JP13904882A patent/JPS5929803A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5929803A (en) | 1984-02-17 |
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