CN105459034A - Valve device and pneumatic tool having the valve device - Google Patents
Valve device and pneumatic tool having the valve device Download PDFInfo
- Publication number
- CN105459034A CN105459034A CN201510626783.9A CN201510626783A CN105459034A CN 105459034 A CN105459034 A CN 105459034A CN 201510626783 A CN201510626783 A CN 201510626783A CN 105459034 A CN105459034 A CN 105459034A
- Authority
- CN
- China
- Prior art keywords
- fluid passage
- opening
- valve
- closing operation
- operation element
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
- F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
- F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
- F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve
Abstract
A valve operating component can be operated to allow a valve body to reliable move between an open position and a seal position; the valve device comprises the following elements: a fluid passage element (30); an open-close work element (28) extending in a mode of penetrating the fluid passage element in a cross section direction, and the open-close work element can move between the seal position and the open position; a valve operation element (30) capable of moving between the close position and open position on an outer periphery of the fluid passage element, and the valve operation element is provided with a press cam layout curve portion (36) clamped with one end (28b) of the open-close work element in a slide manner on the inner periphery, and provided with a return cam layout curve portion (38) clamped with the other end (28c) of the open-close work element in a slide manner. The valve operation element moves between the open position and close position, thus using the cam layout curve portions to enable the open-close work element to move between the open position and seal position.
Description
Technical field
The present invention relates to and make the valve gear of the opening and closing of the fluid passage of the working fluid such as compressed air for carrying out and possess the fluid operating instrument of this valve gear in the fluid operating instrument such as grinder of pneumatic type, particularly relate to pneumatic tool.
Background technology
Such as, disclose a kind of following grinder in No. 2004-209596, Japanese Unexamined Patent Publication (patent document 1), it receives the compressed air from compressed air source (air pump) and makes Grinding structural unit rotate thus carry out grinding operation to air motor supply.This grinder possesses and is exerted a force by spring and the valve body of cutting out by compressed-air actuated fluid passage, when carrying out grinding operation, operator becomes by making valve operating component open (work) position from closedown (not working) position, thus make the valve work pin be connected with valve body from detent position to release position displacement, make this valve body overcome acting force of the spring from fluid passage detent position to the displacement of fluid passage release position, to air motor supply, Grinding structural unit is rotated compressed air.When interrupting or terminate grinding operation, operator returns to closed position from open position by making valve operating component, thus valve body is by above-mentioned acting force of the spring and Returning fluid path detent position, with therewith, valve work pin also returns detent position from release position.
At first technical literature
Patent document
Patent document 1: No. 2004-209596, Japanese Unexamined Patent Publication
In the fluid operating instrument that above-mentioned grinder is such, the foreign matters such as dust enter valve gear and the motion of valve work pin are deteriorated, make valve operating component return to closed position even if may produce, also cannot be made the situation of this valve body Returning fluid path detent position by acting force of the spring.
Summary of the invention
Invent problem to be solved
The present invention completes in view of such problem, its object is to, a kind of valve gear is provided and possesses the fluid operating instrument of this valve gear, particularly pneumatic tool, described valve gear possesses for along with making valve operating component return to closed position from open position, and forcibly makes the cam mechanism of the valve body Returning fluid path detent position being positioned at fluid passage release position.
For solving the scheme of problem
That is, the invention provides a kind of valve gear, comprising:
Fluid passage element, it has fluid passage;
Opening and closing operation element, it is arranged on described fluid passage element, and and can be pressed in the cross-sectional direction of described fluid passage from described detent position and be used for displacement between the release position that described fluid passage is open at the detent position for being closed by described fluid passage; And
Valve operating component, it can on the outer peripheral face of described fluid passage element and displacement between closed position and open position, and possess and return to cam profile curve portion, the described cam profile curve portion that returns is configured to, when described valve operating component is from described open position to described closed position displacement, be slidably fastened with the end of the described opening and closing operation element externally given prominence to from described fluid passage element, thus make described opening and closing operation element return described detent position from described release position.
In this valve gear, utilize cam mechanism to make opening and closing operation element reliably return detent position from release position, thus eliminate problem as above.
Specifically, following mode can be adopted, that is,
Described opening and closing operation element is configured to extend in the mode of described fluid passage element through on described cross-sectional direction, and has and described the other end of opposition side returning to the described end that cam profile curve portion is slidably fastened, described end,
Described valve operating component possesses pressing cam profile curve portion, described pressing cam profile curve portion is configured to, when described valve operating unit is from described closed position towards described open position displacement, be slidably fastened with described the other end of described opening and closing operation element, thus make described opening and closing operation element from described detent position to the displacement of described release position.
By making the one end returning cam profile curve portion and opening and closing operation element be slidably fastened, pressing cam profile curve portion and the other end are slidably fastened, thus reliably can carry out the displacement between the release position of opening and closing operation element and detent position.
More specifically, following mode can be adopted, that is,
Described valve operating component can displacement between described closed position and described open position in the circumference centered by the long limit axis of described fluid passage element.
In addition, in other example, following mode can be adopted, that is,
Described valve operating component can displacement between described closed position and described open position on the direction of the long limit axis being parallel of described fluid passage element.In this case, press cam profile curve portion and the end that returns cam profile curve portion and opening and closing operation element be slidably fastened and make the part of opening and closing operation element displacement be not limited to curve also can be set to straight line.
In above valve gear, following mode can be adopted, that is,
Be the valve body for fluid passage described in opening and closing by described opening and closing operation element, and be formed as when being positioned at described detent position, described fluid passage being closed, when being positioned at described release position, described fluid passage is open.
Specifically, following mode can be adopted, that is,
Described valve body as described opening and closing operation element has: closure, its be formed as when being positioned at described detent position by described fluid passage close size; And opening portion, it is radially cross-sectional by described fluid passage when being positioned at described release position, and is formed as allowing that fluid passes and the size of flowing in the both sides of described opening portion.
As other example, following mode can be adopted, that is,
Described opening and closing operation element is the component for making valve body work, described valve body is used for fluid passage described in opening and closing, and described opening and closing operation element is formed as making described valve body be in fluid passage detent position when being positioned at described detent position, and described valve body is made to be in fluid passage release position when being positioned at described release position.
The present invention also provides a kind of pneumatic tool, its from external reception compressed air and to air motor supply thus drive described air motor to carry out operation, wherein, described pneumatic tool possesses above-mentioned valve gear, and compressed air is supplied to described air motor by the described fluid passage of the described fluid passage element in described valve gear.
Below, with reference to the accompanying drawings valve gear of the present invention and the air tool embodiment that possesses this valve gear are described.
Accompanying drawing explanation
Fig. 1 is the use of the longitudinal section as air tool grinder of valve gear of the present invention.
Fig. 2 is local excision's top view of the grinder of Fig. 1, and discoid Grinding structural unit omits diagram.
Fig. 3 is the figure of the valve gear representing the Fig. 1 being in fluid passage closed state, a () is longitudinal section, figure when () is the A-A line observation in (a) b, figure when (c) is the B-B line observation in (a).
Fig. 4 is the figure of the valve gear representing the Fig. 1 being in fluid passage open state, a () is longitudinal section, figure when () is the C-C line observation in (a) b, figure when (c) is the D-D line observation in (a).
Fig. 5 is the expanded view valve operating component of the tubular in the valve gear of Fig. 1 being illustrated the inner surface of this valve operating component along the line cut-out expansion of limit long with it axis being parallel, a () is the inner surface of the valve operating component of valve gear when being positioned at fluid passage closed state, (b) shows the figure of the inner surface of valve operating component valve operating component makes this valve gear become fluid passage open state during from the state displacement of (a).
Fig. 6 illustrates the distribution channel closed state of the valve gear of the second embodiment of the present invention, a () is longitudinal section, figure when () is the A-A line observation in (a) b, figure when (c) is the B-B line observation in (a).
Fig. 7 illustrates the distribution channel open state of the valve gear of the second embodiment of the present invention, a () is longitudinal section, figure when () is the C-C line observation in (a) b, figure when (c) is the D-D line observation in (a).
Detailed description of the invention
Grinder 10 shown in Fig. 1 and Fig. 2 has: receive compressed-air actuated air intake joint 12 that never illustrated compressed air source (air pump) supplies, link and control compressed air to the valve gear of the present invention 16 of the supply of air motor 14, cut-out, the rotation transfer part 22 transmitted to discoid Grinding structural unit 20 by the rotary driving force of the output shaft 18 from air motor 14 with this air intake joint 12.The air motor 14, rotation transfer part 22 etc. of grinder 10 are well-known, therefore omit their detailed description, are described below to valve gear 16.
Fig. 3 and Fig. 4 shows the valve gear 16 under the state having linked air intake joint 12.Valve gear 16 has: two cylindrical members 26a, 26b form in being concentrically screwed each other, and mark off the fluid passage element 26 of the fluid passage 24 from air intake joint 12 to air motor 14 (Fig. 1); For carrying out the valve body 27 of the opening and closing of this fluid passage 24; The slender rod shaped opening and closing operation element 28 be connected with this valve body 27; And by this opening and closing operation element 28 for the valve operating component 30 of the tubular of the opening and closing operations of carrying out valve body 27.
Valve body 27 is set to disc-shape, and have and be fixed therein the heart and the connecting axle 27a forwards extended, this connecting axle 27a inserts opening 28a in the mode that can slide, and this opening 28a is arranged on the central authorities of the length direction of opening and closing operation element 28.Opening and closing operation element 28 is set to this fluid passage element 26 through on the cross-sectional direction of fluid passage element 26, its end 28b, 28c respectively can with the pressing cam profile curve portion 36 that arranges on the inner peripheral surface of valve operating component 30 with return to cam profile curve portion 38 and be slidably fastened.
Press cam profile curve portion 36 and return to cam profile curve portion 38 and form according to following mode.
When making valve operating component 30 rotate from the position (closed position) shown in (b) of Fig. 3 to the position (open position) shown in (b) of Fig. 4 along clockwise direction, pressing cam profile curve portion 36 is slidably fastened with the end 28b of opening and closing operation element 28, and by opening and closing operation element 28 from the position (detent position) shown in (b) of Fig. 3 to position (release position) pressing shown in (b) of Fig. 4, thus, the connecting axle 27a of valve body 27 tilts, thus this valve body 27 becomes a part (be top in the illustrated example) state that engages with valve seat 34 as shown in (a) of Fig. 4 has a down dip and the fluid passage release position that makes the opening of this fluid passage 24.
When making valve operating component 30 rotate from the open position shown in (b) of Fig. 4 to the closed position shown in (b) of Fig. 3 in the counterclockwise direction, return to cam profile curve portion 38 to be slidably fastened with the end 28c of opening and closing operation element 28, and opening and closing operation element 28 is returned from the release position shown in (b) of Fig. 4 to the detent position shown in (b) of Fig. 3, thus, the connecting axle 27a of valve body 27 is in the position of the long limit axis 24x along fluid passage 24, this valve body 27 becomes to seal all sidedly with valve seat 34 and engages and the fluid passage detent position closed by this fluid passage 24 as shown in (a) of Fig. 3.In this condition, valve body 27 is pressed on valve seat 34 by conical helical spring 40 thus reliably carries out engaging with the sealing of valve seat 34.
As shown in (b) of Fig. 3, the two ends in pressing cam profile curve portion 36 are provided with recess 36a, 36b.Recess 36a is when valve operating component 30 is positioned at the closed position shown in (b) of Fig. 3, and accept the end 28b of opening and closing operation element 28, conical helical spring 40 flexibly supports the opening and closing operation element 28 under this state.Recess 36b is when valve operating component 30 is positioned at the open position shown in (b) of Fig. 4, accept the end 28b of opening and closing operation element 28, conical helical spring 40 flexibly supports the opening and closing operation element 28 under this state, prevents valve operating component 30 from unexpectedly rotating to closed position.
In the power-driven tools such as grinder, in order to make this instrument become open mode (duty) from closed condition (off position), consider from secure context, in decree, regulation must be undertaken by the operation of two steps.Therefore in illustrated grinder 10, in order to become the fluid passage open state (i.e. open mode) shown in Fig. 4 from the fluid passage closed state (i.e. closed condition) shown in Fig. 3, from these figure, valve operating component 30 is made first (to make valve operating component 30 from the state of (a) of Fig. 3 displacement and become the state (first step) of (a) of Fig. 4 to the left in the example in the figures with the long limit axis 24x displacement abreast of this fluid passage 24, next, carry out the rotating operation (second step) in the circumference of the long limit axis 24x of hydrodynamic form path 24 as described above, thus become open mode from closed condition.Therefore, when valve operating component 30 is become open mode by force from closed condition in the position shown in (a) of Fig. 3 by helical spring 42, operator overcomes the acting force of the spring of this helical spring 42 and this valve operating component 30 is moved in the axial direction, rotates afterwards.Expanded view shown in Fig. 5 shows the structure of the operation for carrying out this two step.That is, on the inner peripheral surface of valve operating component 30, except the pressing cam profile curve portion 36 formed as recess and return except cam profile curve portion 38, two step recesses 44 of the operation for two steps are provided with.This two steps recess 44 by the axis direction recess 44a extended abreast with the long limit axis 24x of this valve operating component 30 and be connected with this axis direction recess 44a and the peripheral recess 44b extended in the circumferential ((c) of Fig. 3 and (c) of Fig. 4) with forms, and the banking pin 46 be arranged on fluid passage element 26 and this two steps recess 44 are slidably fastened.Namely, when valve operating component 30 is positioned at the closed position shown in Fig. 1, banking pin 46 is positioned at axis direction recess 44a, making this banking pin 46 enter in peripheral recess 44b, can carry out the rotation of this valve operating component 30 thus by being moved to the left in figure by valve operating component 30.
In the valve gear 16 of the second embodiment of the present invention shown in Fig. 6 and Fig. 7, the opening and closing operation element 28 in the valve gear 16 of the first above-mentioned embodiment is formed as the valve body of direct opening and closing fluid passage 24.This opening and closing operation element 28 is identical with same first embodiment of the interaction relationship of valve operating component 30, valve operating component 30 has pressing cam profile curve portion 36 and returns to cam profile curve portion 38, by the rotating operation of this valve operating component 30, make opening and closing operation element 28 displacement between the detent position closed by fluid passage 24 and the release position that fluid passage 24 is open.Specifically, the curved portion of pressing cam profile curve portion 36 from the position that the end 28b of the opening and closing operation element 28 in Fig. 6 (b) engages counterclockwise in the gamut of 90 °, returning to cam profile curve portion 38 is curved portion from the position that the end 28c of the opposition side of opening and closing operation element 28 engages counterclockwise in the gamut of 90 °.
Opening and closing operation element 28 has: closure 28-1, its size being formed as coordinating with fluid passage 24 when this opening and closing operation element 28 is positioned at detent position and being closed by this fluid passage 24; Opening portion 28-2, it is connected with this closure 28-1, and is formed as coordinating with fluid passage 24 when opening and closing operation element 28 is positioned at release position and allowing the size of the flowing of fluid; And head 28-3, it is connected with this opening portion 28-2 and is slidably fastened with pressing cam profile curve portion 36.Opening portion 28-2 is formed as the slender member linking head 28-3 and closure 28-1, and is formed as making fluid pass in the both sides of this opening portion 28-2 and the size of flowing when opening and closing operation element 28 is positioned at release position.
Above, the embodiment of valve gear of the present invention is illustrated, but the present invention is not limited to these embodiments, and can various distortion be carried out.Such as, the opening and closing operation element 28 playing function as the valve body in the second embodiment can be formed as tabular as so-called gate valve, and opening portion 28-2 can arrange the opening with the area roughly the same with fluid passage 24.In addition, valve operating component 30 makes open and close valve element 28 displacement between detent position and release position by rotating, but also can by the mobile identical displacement producing open and close valve element 28 point-blank in the axial direction.
Claims (8)
1. a valve gear, comprising:
Fluid passage element, it has fluid passage;
Opening and closing operation element, it is arranged on described fluid passage element, and and can be pressed in the cross-sectional direction of described fluid passage from described detent position and be used for displacement between the release position that described fluid passage is open at the detent position for being closed by described fluid passage; And
Valve operating component, it can on the outer peripheral face of described fluid passage element and displacement between closed position and open position, and possess and return to cam profile curve portion, the described cam profile curve portion that returns is configured to, when described valve operating component is from described open position to described closed position displacement, be slidably fastened with the end of the described opening and closing operation element externally given prominence to from described fluid passage element, thus make described opening and closing operation element return described detent position from described release position.
2. valve gear according to claim 1, wherein,
Described opening and closing operation element is configured to extend in the mode of described fluid passage element through on described cross-sectional direction, and has and described the other end of opposition side returning to the described end that cam profile curve portion is slidably fastened, described end,
Described valve operating component possesses pressing cam profile curve portion, described pressing cam profile curve portion is configured to, when described valve operating unit is from described closed position towards described open position displacement, be slidably fastened with described the other end of described opening and closing operation element, thus make described opening and closing operation element from described detent position to the displacement of described release position.
3. valve gear according to claim 2, wherein,
Described valve operating component can displacement between described closed position and described open position in the circumference centered by the long limit axis of described fluid passage element.
4. valve gear according to claim 2, wherein,
Described valve operating component can displacement between described closed position and described open position on the direction of the long limit axis being parallel of described fluid passage element.
5. valve gear according to any one of claim 1 to 4, wherein,
Be the valve body for fluid passage described in opening and closing by described opening and closing operation element, and be formed as when being positioned at described detent position, described fluid passage being closed, when being positioned at described release position, described fluid passage is open.
6. valve gear according to claim 5, wherein,
Described valve body as described opening and closing operation element has: closure, its be formed as when being positioned at described detent position by described fluid passage close size; And opening portion, it is radially cross-sectional by described fluid passage when being positioned at described release position, and is formed as allowing that fluid passes and the size of flowing in the both sides of described opening portion.
7. valve gear according to any one of claim 1 to 4, wherein,
Described opening and closing operation element is the component for making valve body work, described valve body is used for fluid passage described in opening and closing, and described opening and closing operation element is formed as making described valve body be in fluid passage detent position when being positioned at described detent position, and described valve body is made to be in fluid passage release position when being positioned at described release position.
8. a pneumatic tool, its from external reception compressed air and to air motor supply thus drive described air motor to carry out operation, wherein,
Described pneumatic tool possesses the valve gear according to any one of Claims 1-4, and compressed air is supplied to described air motor by the described fluid passage of the described fluid passage element in described valve gear.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014200791A JP6423224B2 (en) | 2014-09-30 | 2014-09-30 | VALVE DEVICE AND AIR TOOL WITH VALVE DEVICE |
| JP2014-200791 | 2014-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105459034A true CN105459034A (en) | 2016-04-06 |
| CN105459034B CN105459034B (en) | 2017-09-01 |
Family
ID=55597419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510626783.9A Active CN105459034B (en) | 2014-09-30 | 2015-09-28 | Valve gear and the pneumatic tool for possessing valve gear |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6423224B2 (en) |
| KR (1) | KR101767739B1 (en) |
| CN (1) | CN105459034B (en) |
| TW (1) | TWI555916B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110450015A (en) * | 2019-09-10 | 2019-11-15 | 上海科科阀门集团有限公司 | A kind of butterfly valve seat grinding device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3221553A1 (en) * | 1982-06-08 | 1983-12-08 | Deutsche Gardner-Denver Gmbh, 7081 Westhausen | Compressed-air screwing tool |
| US4772186A (en) * | 1986-02-18 | 1988-09-20 | The Aro Corporation | Automatic fluid torque responsive shut-off mechanism for an air tool |
| WO1999049247A1 (en) * | 1997-01-30 | 1999-09-30 | Nitto Kohki Co., Ltd. | Apparatus for controlling supply and cut-off of fluid |
| JP2004209596A (en) * | 2002-12-27 | 2004-07-29 | Fuji Kuki Kk | Air feed structure for air tool |
| US7207348B2 (en) * | 2003-01-14 | 2007-04-24 | Recoules S.A. | Machine comprising a safety valve for the supply of pressurised fluid |
| CN201124364Y (en) * | 2007-10-01 | 2008-10-01 | 苏州宝时得电动工具有限公司 | Power tool |
| CN202781090U (en) * | 2012-09-14 | 2013-03-13 | 海峰机械工业股份有限公司 | Pneumatic tool control handle rotating structure and pneumatic tool comprising same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4843670Y1 (en) * | 1970-01-29 | 1973-12-17 | ||
| JPS5082487U (en) * | 1973-11-29 | 1975-07-15 | ||
| US4736742A (en) * | 1986-04-03 | 1988-04-12 | Minnesota Mining And Manufacturing Company | Device for driving tools used in orthopedic surgery |
| JP3868414B2 (en) * | 2003-10-07 | 2007-01-17 | 不二空機株式会社 | Air tools |
| WO2005111422A1 (en) * | 2004-05-13 | 2005-11-24 | Neuberg Company Limited | Diaphragm pump and manufacturing apparatus of electronic component |
| JP4695870B2 (en) * | 2004-05-13 | 2011-06-08 | ノイベルク有限会社 | Diaphragm pump and electronic component manufacturing equipment |
| JP5059313B2 (en) | 2005-10-07 | 2012-10-24 | 日本ニューマチック工業株式会社 | Air tools |
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2014
- 2014-09-30 JP JP2014200791A patent/JP6423224B2/en active Active
-
2015
- 2015-09-03 TW TW104129215A patent/TWI555916B/en active
- 2015-09-24 KR KR1020150135560A patent/KR101767739B1/en active IP Right Grant
- 2015-09-28 CN CN201510626783.9A patent/CN105459034B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3221553A1 (en) * | 1982-06-08 | 1983-12-08 | Deutsche Gardner-Denver Gmbh, 7081 Westhausen | Compressed-air screwing tool |
| US4772186A (en) * | 1986-02-18 | 1988-09-20 | The Aro Corporation | Automatic fluid torque responsive shut-off mechanism for an air tool |
| WO1999049247A1 (en) * | 1997-01-30 | 1999-09-30 | Nitto Kohki Co., Ltd. | Apparatus for controlling supply and cut-off of fluid |
| JP2004209596A (en) * | 2002-12-27 | 2004-07-29 | Fuji Kuki Kk | Air feed structure for air tool |
| US7207348B2 (en) * | 2003-01-14 | 2007-04-24 | Recoules S.A. | Machine comprising a safety valve for the supply of pressurised fluid |
| CN201124364Y (en) * | 2007-10-01 | 2008-10-01 | 苏州宝时得电动工具有限公司 | Power tool |
| CN202781090U (en) * | 2012-09-14 | 2013-03-13 | 海峰机械工业股份有限公司 | Pneumatic tool control handle rotating structure and pneumatic tool comprising same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110450015A (en) * | 2019-09-10 | 2019-11-15 | 上海科科阀门集团有限公司 | A kind of butterfly valve seat grinding device |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI555916B (en) | 2016-11-01 |
| TW201629357A (en) | 2016-08-16 |
| KR20160038792A (en) | 2016-04-07 |
| KR101767739B1 (en) | 2017-08-11 |
| JP6423224B2 (en) | 2018-11-14 |
| JP2016070384A (en) | 2016-05-09 |
| CN105459034B (en) | 2017-09-01 |
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