CA1219574A - Hand grinder and valve therefor - Google Patents
Hand grinder and valve thereforInfo
- Publication number
- CA1219574A CA1219574A CA000442988A CA442988A CA1219574A CA 1219574 A CA1219574 A CA 1219574A CA 000442988 A CA000442988 A CA 000442988A CA 442988 A CA442988 A CA 442988A CA 1219574 A CA1219574 A CA 1219574A
- Authority
- CA
- Canada
- Prior art keywords
- valve
- casing
- hand grinder
- bush
- machine
- 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
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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/12—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with streamlined valve member around which the fluid flows when the valve is opened
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B15/00—Machines or devices designed for grinding seat surfaces; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/026—Fluid driven
-
- 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
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
- F16P3/18—Control arrangements requiring the use of both hands
- F16P3/22—Control arrangements requiring the use of both hands for hydraulic or pneumatic control systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Lift Valve (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
- Mechanically-Actuated Valves (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Massaging Devices (AREA)
- Toys (AREA)
Abstract
A B S T R A C T
HAND GRINDER AND VALVE THEREFOR
A valve comprises a displaceable valve body which can abut on a valve seat and limit the flow of a medium. The valve has a valve casing which is closed at one end and which has an inlet for the medium at said end. A stem which carries a valve body extends from the other end of the casing. The valve body co-operates with a valve seat designed as a shoulder in a bush through which the stem can be axially displaced.
HAND GRINDER AND VALVE THEREFOR
A valve comprises a displaceable valve body which can abut on a valve seat and limit the flow of a medium. The valve has a valve casing which is closed at one end and which has an inlet for the medium at said end. A stem which carries a valve body extends from the other end of the casing. The valve body co-operates with a valve seat designed as a shoulder in a bush through which the stem can be axially displaced.
Description
~2~
The invention relates to a valve comprising a dis-placable valve body which can abut on a valve seat and limit the flow of a medium.
Valves of this type are used for regulating and con-trolling working mediums in the form of compressed air and liquids utilized in air and hydraulic ma-chines, respectively, of various types.
The invention furthermore relates to a hand grinder comprising a valve as mentioned above.
Such grinders must be operated in a suitable and safe manner and therefore it must be possible for the user to adjust the valve in a convenient way dependent of the situation of use in question.
In case of hand tools, the machine must therefore be manually adjustable and preferably without impairing the control of the tool in that damages may be incur-red on tools and/or work.
In practice there are especially problems in connec-tion with large and heavy hand tools making so heavy demands on a secure grip that it is difficult to control the flow of the working medium through the valve without impairing the control of the tool. This means that the tool must be removed from the place of work, ie. be made non-machining, if a change of the speed of rotation of the machine is to be adjusted by the valve, when the tool can be made to machine again .
~1 ~2'119~i74 1 by bringing it nearer to the place of work.
It is the object of the present invention to facili-tate the operation and thereby increase work safety and to improve tool precision, and this is achieved by means of a valve comprising a valve casing closed at one end and having an inlet for the medium at said end, and where on the inner side from said end there is extending a stem provided with a valve body, said body facing the end of the casing and cooperating with a valve seat designed as a recess in a bush wherein the stem can be axially displaced.
There is thus obtained a valve which can be designed in a handle forming one of the holding positions on a tool in that the medium can be admitted to the rear of the handle at the closed end of the casing, e.g.
through a hose, and through the valve to the opening in the bush and then, e.g. through a pipe, to the working machine. From there the medium can be admit-ted through a second handle, if any, which can like-wise be provided with a handle. In this manner, the pipe can form part of the tool e~uipment so that the control and regulating functions can be effected by means of one of the handles with a built-in regulating valve. The operation of the valve takes place by an axial movement of the valve casing.
By designing the valve casing as disclosed in claim
The invention relates to a valve comprising a dis-placable valve body which can abut on a valve seat and limit the flow of a medium.
Valves of this type are used for regulating and con-trolling working mediums in the form of compressed air and liquids utilized in air and hydraulic ma-chines, respectively, of various types.
The invention furthermore relates to a hand grinder comprising a valve as mentioned above.
Such grinders must be operated in a suitable and safe manner and therefore it must be possible for the user to adjust the valve in a convenient way dependent of the situation of use in question.
In case of hand tools, the machine must therefore be manually adjustable and preferably without impairing the control of the tool in that damages may be incur-red on tools and/or work.
In practice there are especially problems in connec-tion with large and heavy hand tools making so heavy demands on a secure grip that it is difficult to control the flow of the working medium through the valve without impairing the control of the tool. This means that the tool must be removed from the place of work, ie. be made non-machining, if a change of the speed of rotation of the machine is to be adjusted by the valve, when the tool can be made to machine again .
~1 ~2'119~i74 1 by bringing it nearer to the place of work.
It is the object of the present invention to facili-tate the operation and thereby increase work safety and to improve tool precision, and this is achieved by means of a valve comprising a valve casing closed at one end and having an inlet for the medium at said end, and where on the inner side from said end there is extending a stem provided with a valve body, said body facing the end of the casing and cooperating with a valve seat designed as a recess in a bush wherein the stem can be axially displaced.
There is thus obtained a valve which can be designed in a handle forming one of the holding positions on a tool in that the medium can be admitted to the rear of the handle at the closed end of the casing, e.g.
through a hose, and through the valve to the opening in the bush and then, e.g. through a pipe, to the working machine. From there the medium can be admit-ted through a second handle, if any, which can like-wise be provided with a handle. In this manner, the pipe can form part of the tool e~uipment so that the control and regulating functions can be effected by means of one of the handles with a built-in regulating valve. The operation of the valve takes place by an axial movement of the valve casing.
By designing the valve casing as disclosed in claim
2, the valve becomes self-closing without any use of auxiliary springs in that the pressure exerted by the medium will close the valve. This gives a high degree ; of operating comfort and at the same time great security of the valve being closed when the operator's ~ S7 4 1 hold of the handle is released.
By making the casing rotatable as disclosed in claim
By making the casing rotatable as disclosed in claim
3, the valve can be produced by such simple operations as boring and turning.
By providing the casing with an inclined track as disclosed in claim 4 and letting a pin move in this track and thereby displace the casing relative to the bushg the regulating can take place by a small turn of the casing.
By designing the valve as disclosed in claim 5, it can be constructed by simple components which are partly cheaply produced and partly easily replaced.
As disclosed in claim 6, it is suitable to secure the bush to an integrated part of the tool, thereby making it possible to use the handle for regulating as well as controlling the tool without the operator having to remove his hands from the handle.
The invention also relates to a hand grinder which can use the valve according to the the invention.
By designing a hand grinder as disclosed in claim 7, there is obtained a very efficient and safe hand grinder. By carrying the pressure medium to and from the machine within the handle pipe, there is obtained 3 a high degree of security against breakages, and by designing the handle pipe with handles at the ends, the operator will keep in close contact with the grinder which will furthermore be of a very simple construction.
3L29L9S7~
~, 1 By letting the axis of rotation of the spindle be parallel to the longitudinal axes of the handles as disclosed in claim 8, there is obtained a convenient working position for the user. When using the grinder in such a way that the ends of the handles turn down-wards, the grinder can be safely carried over verti-cal surfaces or the like.
By building the machine into the spindle as disclosed in claim 9, the best possible use of the space between the handles is made, just as the machine is well protected against dirt.
A grinder according to the invention can suitably be provided with a safety guard as disclosed in claim 10.
The user is thereby given a high degree of safety in that the entire rear of the grinder is fenced.
By the grinding means disclosed in claim 11 comprising an assembly of a plurality of slotted discs, an effi-cient hand grinder is obtained, where the disc slats can efficiently grind even very irregular surfaces.
Moreover, it is easy to replace the slotted disc assembly since it need only be provided with new grinding discs between the retaining discs. The whole assembly is simply secured by a screw at the end of the spindle. Such grinding discs are mentioned in the applicant's US patent application USSN 395,001.
The invention will be further described in the follow-ing with reference to the drawing, wherein Fig. 1 is a sectional view of the valve in its closed position along the line ~9 S~ 4 1 I-I in fig. 3, Fig. 2 is the same valve, but in its open position, Fig. 3 is a perspective view of the valve, Fig. 4 is a sectional view of the hand grinder shown in Fig. 5 in the direction of the arrows along the line IV-IV in ~ig. 5, and ~ig. 5 is a top view of a hand grinder according to ~ig. 4.
The drawing shows an embodiment of the invention wherein the valve forms part of the control handle or the guide 5 of a not shown machine-driven grinder.
The grinder is provided with a guide, one end of which is shown in the drawing as the pipe 5 being the end of the right or left part of the guide.
The working medium in the form of compressed air or liquid is admitted to the machine through a hose 13 connected to the valve by a hose coupling 12 which can be of any suitable type.
The valve itself comprises a casing 1 which is rota-table about the longitudinal axis and which on the outside can be covered with rubber 16 to improve comfort and to ensure a firm grip.
The casing 1 is closed at one end so that an intake chamber 11 is formed at the admission 12. A bolt 10 retaining partly a dished ring part 7 partly a spa~cing pipe 8 retaining the ring part 7 at a given distance from the end of the casing is screwed into the end wall of the casing.
1 Moreover, an obli~ue through-going track 4, see espe-cially fig. 3, is arranged in the casing. In this track it is possible to displace a bolt head 3 so that a turn of the casing gives an axial movement thereof relative to a stationary bush 2.
This bush has been inserted in the casing so as to extend a suitable distance into the casing and at the end being provided with a circumferential groove wherein a packing 6 is arranged providing a seal between bush and casing.
At some distance therefrom the bush is provided with a recess forming on its Qutwardly extending surface extending at right angles to the axis a seat 14 in the valve. The bolt 3 securing the casing in its position is moreover screwed into this recess.
~inally, at its outwardly extending end the bush 2 is provided with an external thread which can be screwed into the pipe 5 and through which the working medium is admitted when operating.
As appears from the drawing, the valve is assembled with a packing 9 between the ring 7 and the pipe 8 so that in the position shown in fig. 1 the valve has completely cut off for the working medium to the machine.
By turning the handle 16 towards the position shown in fig. 2, the casing is moved towards the left and thereby the valve body 7,8,9 away from the seat 14.
This makes it possible for the medium to pass through the valve. The passage is continuously variable IS7~
1 from a closed position to maximum whereby it is pos-sible to precisely control the admission of wording medium to the machine.
When releasing the handle, the casing on account of the pressure of the working medium on the end surface being ]arger than the end area of the bush will move the casing to the right and thereby the valve body towards the valve seat and so closing the valve. The valve is therefore a self-closing valve which is totally independent of compression springs or the like.
This renders a very high degree of security in that the machine will automatically and quite reliably cut ff admission of pressure medium to the machine which will therefore stop. In case of a fall or some other accident, the valve will close automatically and thereby stop the machine.
To sum up it may be established that this simple and reliable valve renders a continuously variable con-trol of the machine power at the same time as full control Or the tool operation is maintained. Further-more, there is the abovementioned security of an immediate stop of the machine in case the hold on the handle should cease.
Figs. 4 and 5 show a hand grinder according to the invention. The hand grinder is provided with a handle 3 pipe 17 being substantially U-shaped. In fig. 5 the handle pipe 17 is shown with a bend so that the handles 25,26 are situated closer to the user than the center of the grinder. This to a high degree facilitates the operator's use on the machine. In ~Lz~lL9~i7a~
1 each end the handle pipe is provided with hand~les 25, 26, and the handle pipe 17 is moreover provided with an inlet passage 18 and an outlet passage 19.
In case the handle pipe is assembled by two lengths of pipe, the passages 18, 19 should mearly be the inside diameter of the pipe.
In the handle 25 there is arranged a valve 21 accord-ing to the invention, said valve having an inlet nozzle 22 being suitably provided with a snap action coupling for a pressure hose. In the handle 26 the outlet passage 19 ends with an outlet opening 23.
This can e.g. be provided with a filter 24 or a sound-absorbing devise just as the outlet opening 23 can be connected to a return hose for hydraulic liquid.
In connection with the inlet passage 18 and the outlet passage 19 the machine 20 is arranged within a hollow spindle 27. This can suitably be driven by compressed air, but a hydraulic machine can also be used.
- The machine 20 is controlled by the valve 21, said machine making the spindle 27 rotate. A number of grinding discs 28 are secured to the spindle by means of retaining discs 31. These grinding discs can suit-ably consist of sand paper or emery clothj but other materials are available. The discs 28 are slotted so that they comprise a plurality of slats. These slats 3 can be made double so that both sides are grinding.
Other types of grinding means are possible however.
'The spindle can be covered with wool or the like for polishing purposes.
1 When the grinding means as shown in the drawing rotates, it is possible to grind eve-n highly irregu-lar or difficult work pieces, because the slats will go into even very deep profiles and grind efficiently.
This makes the hand grinder according to the invention very efficient for e.g. an intermediate grinding of barnished work pieces such as furniture.
The hand grinder is moreover provided with a safety guard 30. This is dome-shaped so as to encircle the part of the grinding means facing the user. The safe-ty guard 30 is suitably made from a light and strong plastic material. The safety guard can be designed in a great number of other ways in that they can be semicircular or quadrangular.
The handle pipe 17 can conveniently be made of alumi-nium. It is very important to reduce the weight of the grinder so as to avoid the user becoming tired.
Due to its compactness and the possibility of using light materials, the grinder can be made very light.
The grinding discs 28 are secured to the spindle 27 between retaining discs 31. These are tightened be-tween a removable flange 33 and a fixed flange 32by means of a centre screw 29. When the grinding discs 28 are worn out, they can therefore be replaced.
The retaining discs 31 are provided with a centre opening fitting into the spindle 27. This can e.g.
3 be provided with a longitudinal toothing for sec-uring the grinding discs being tightedly fixed or in some other manner retained between the retaining discs ~ 31.
~Z~95q~
1 The invention according to the application is not limited to the embodiment shown in the drawing. A
hand grinder according to the application can be designed in rnany different ways within the scope of the invention such as these appear from the annexed patent claims.
:~`
3o
By providing the casing with an inclined track as disclosed in claim 4 and letting a pin move in this track and thereby displace the casing relative to the bushg the regulating can take place by a small turn of the casing.
By designing the valve as disclosed in claim 5, it can be constructed by simple components which are partly cheaply produced and partly easily replaced.
As disclosed in claim 6, it is suitable to secure the bush to an integrated part of the tool, thereby making it possible to use the handle for regulating as well as controlling the tool without the operator having to remove his hands from the handle.
The invention also relates to a hand grinder which can use the valve according to the the invention.
By designing a hand grinder as disclosed in claim 7, there is obtained a very efficient and safe hand grinder. By carrying the pressure medium to and from the machine within the handle pipe, there is obtained 3 a high degree of security against breakages, and by designing the handle pipe with handles at the ends, the operator will keep in close contact with the grinder which will furthermore be of a very simple construction.
3L29L9S7~
~, 1 By letting the axis of rotation of the spindle be parallel to the longitudinal axes of the handles as disclosed in claim 8, there is obtained a convenient working position for the user. When using the grinder in such a way that the ends of the handles turn down-wards, the grinder can be safely carried over verti-cal surfaces or the like.
By building the machine into the spindle as disclosed in claim 9, the best possible use of the space between the handles is made, just as the machine is well protected against dirt.
A grinder according to the invention can suitably be provided with a safety guard as disclosed in claim 10.
The user is thereby given a high degree of safety in that the entire rear of the grinder is fenced.
By the grinding means disclosed in claim 11 comprising an assembly of a plurality of slotted discs, an effi-cient hand grinder is obtained, where the disc slats can efficiently grind even very irregular surfaces.
Moreover, it is easy to replace the slotted disc assembly since it need only be provided with new grinding discs between the retaining discs. The whole assembly is simply secured by a screw at the end of the spindle. Such grinding discs are mentioned in the applicant's US patent application USSN 395,001.
The invention will be further described in the follow-ing with reference to the drawing, wherein Fig. 1 is a sectional view of the valve in its closed position along the line ~9 S~ 4 1 I-I in fig. 3, Fig. 2 is the same valve, but in its open position, Fig. 3 is a perspective view of the valve, Fig. 4 is a sectional view of the hand grinder shown in Fig. 5 in the direction of the arrows along the line IV-IV in ~ig. 5, and ~ig. 5 is a top view of a hand grinder according to ~ig. 4.
The drawing shows an embodiment of the invention wherein the valve forms part of the control handle or the guide 5 of a not shown machine-driven grinder.
The grinder is provided with a guide, one end of which is shown in the drawing as the pipe 5 being the end of the right or left part of the guide.
The working medium in the form of compressed air or liquid is admitted to the machine through a hose 13 connected to the valve by a hose coupling 12 which can be of any suitable type.
The valve itself comprises a casing 1 which is rota-table about the longitudinal axis and which on the outside can be covered with rubber 16 to improve comfort and to ensure a firm grip.
The casing 1 is closed at one end so that an intake chamber 11 is formed at the admission 12. A bolt 10 retaining partly a dished ring part 7 partly a spa~cing pipe 8 retaining the ring part 7 at a given distance from the end of the casing is screwed into the end wall of the casing.
1 Moreover, an obli~ue through-going track 4, see espe-cially fig. 3, is arranged in the casing. In this track it is possible to displace a bolt head 3 so that a turn of the casing gives an axial movement thereof relative to a stationary bush 2.
This bush has been inserted in the casing so as to extend a suitable distance into the casing and at the end being provided with a circumferential groove wherein a packing 6 is arranged providing a seal between bush and casing.
At some distance therefrom the bush is provided with a recess forming on its Qutwardly extending surface extending at right angles to the axis a seat 14 in the valve. The bolt 3 securing the casing in its position is moreover screwed into this recess.
~inally, at its outwardly extending end the bush 2 is provided with an external thread which can be screwed into the pipe 5 and through which the working medium is admitted when operating.
As appears from the drawing, the valve is assembled with a packing 9 between the ring 7 and the pipe 8 so that in the position shown in fig. 1 the valve has completely cut off for the working medium to the machine.
By turning the handle 16 towards the position shown in fig. 2, the casing is moved towards the left and thereby the valve body 7,8,9 away from the seat 14.
This makes it possible for the medium to pass through the valve. The passage is continuously variable IS7~
1 from a closed position to maximum whereby it is pos-sible to precisely control the admission of wording medium to the machine.
When releasing the handle, the casing on account of the pressure of the working medium on the end surface being ]arger than the end area of the bush will move the casing to the right and thereby the valve body towards the valve seat and so closing the valve. The valve is therefore a self-closing valve which is totally independent of compression springs or the like.
This renders a very high degree of security in that the machine will automatically and quite reliably cut ff admission of pressure medium to the machine which will therefore stop. In case of a fall or some other accident, the valve will close automatically and thereby stop the machine.
To sum up it may be established that this simple and reliable valve renders a continuously variable con-trol of the machine power at the same time as full control Or the tool operation is maintained. Further-more, there is the abovementioned security of an immediate stop of the machine in case the hold on the handle should cease.
Figs. 4 and 5 show a hand grinder according to the invention. The hand grinder is provided with a handle 3 pipe 17 being substantially U-shaped. In fig. 5 the handle pipe 17 is shown with a bend so that the handles 25,26 are situated closer to the user than the center of the grinder. This to a high degree facilitates the operator's use on the machine. In ~Lz~lL9~i7a~
1 each end the handle pipe is provided with hand~les 25, 26, and the handle pipe 17 is moreover provided with an inlet passage 18 and an outlet passage 19.
In case the handle pipe is assembled by two lengths of pipe, the passages 18, 19 should mearly be the inside diameter of the pipe.
In the handle 25 there is arranged a valve 21 accord-ing to the invention, said valve having an inlet nozzle 22 being suitably provided with a snap action coupling for a pressure hose. In the handle 26 the outlet passage 19 ends with an outlet opening 23.
This can e.g. be provided with a filter 24 or a sound-absorbing devise just as the outlet opening 23 can be connected to a return hose for hydraulic liquid.
In connection with the inlet passage 18 and the outlet passage 19 the machine 20 is arranged within a hollow spindle 27. This can suitably be driven by compressed air, but a hydraulic machine can also be used.
- The machine 20 is controlled by the valve 21, said machine making the spindle 27 rotate. A number of grinding discs 28 are secured to the spindle by means of retaining discs 31. These grinding discs can suit-ably consist of sand paper or emery clothj but other materials are available. The discs 28 are slotted so that they comprise a plurality of slats. These slats 3 can be made double so that both sides are grinding.
Other types of grinding means are possible however.
'The spindle can be covered with wool or the like for polishing purposes.
1 When the grinding means as shown in the drawing rotates, it is possible to grind eve-n highly irregu-lar or difficult work pieces, because the slats will go into even very deep profiles and grind efficiently.
This makes the hand grinder according to the invention very efficient for e.g. an intermediate grinding of barnished work pieces such as furniture.
The hand grinder is moreover provided with a safety guard 30. This is dome-shaped so as to encircle the part of the grinding means facing the user. The safe-ty guard 30 is suitably made from a light and strong plastic material. The safety guard can be designed in a great number of other ways in that they can be semicircular or quadrangular.
The handle pipe 17 can conveniently be made of alumi-nium. It is very important to reduce the weight of the grinder so as to avoid the user becoming tired.
Due to its compactness and the possibility of using light materials, the grinder can be made very light.
The grinding discs 28 are secured to the spindle 27 between retaining discs 31. These are tightened be-tween a removable flange 33 and a fixed flange 32by means of a centre screw 29. When the grinding discs 28 are worn out, they can therefore be replaced.
The retaining discs 31 are provided with a centre opening fitting into the spindle 27. This can e.g.
3 be provided with a longitudinal toothing for sec-uring the grinding discs being tightedly fixed or in some other manner retained between the retaining discs ~ 31.
~Z~95q~
1 The invention according to the application is not limited to the embodiment shown in the drawing. A
hand grinder according to the application can be designed in rnany different ways within the scope of the invention such as these appear from the annexed patent claims.
:~`
3o
Claims (11)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Valve comprising a displaceable valve body which can abut on a valve seat and limit the flow of a medium, c h a r a c t e r i z e d i n that the valve comprises a valve casing (1) closed at one end and having an inlet for the medium at said end, and where on the inner side from said end there is extending a stem (8,10) provided with a valve body (5,9), said body facing the end of the casing and co-operating with a valve seat (14) designed as a recess in a bush (2) wherein the stem can be axially displaced.
2. Valve according to claim 1, c h a r a c t e r -i z e d i n that the inner end surface of the casing (1) is larger than the area formed by the bush (2) against the end surface of the casing.
3. Valve according to claim 1 C h a r a c -t e r i z e d i n that said casing (1) is rotatable about the bush (2).
4. Valve according to claims 1 - 3, c h a r a c -t e r i z e d i n that the casing (1) is provided with a track (4) forming an angle with the axis of rotation of the casing, and that a pin (3) secured to the bush (2) moves in the track.
5. Valve according to claims 1 -3, c h a r a c -t e r i z e d i n that the stem comprises a bolt (10) screwed into the end of the casing, and retain-ing behind its head a ring (7) with a packing (9) and a spacing pipe (8).
6. Valve according to claims 1 - 3, c h a r a c -t e r i z e d i n that the bush (2) at the end fac-ing away from the end of the casing (1) is secured to an admission hose or pipe (5) for said medium in the bush.
7. Hand grinder, c h a r a c t e r i z e d i n that the hand grinder comprises a substantially U-shaped handle pipe (17) wherein there are designed an inlet and an outlet passage (18, 19) for a pres-sure medium used for operating a machine (20), said inlet passage (18) being adapted to supply the pressure medium from a valve to the machine (20) and said outlet passage (19) being adapted to carry the pressure medium from the machine (20) to an out-let passage (23) on the handle pipe (17) the ends thereof being designed as handles (25, 26), said valve being mounted in one of the handles (25) of the handle pipe (17), and that the machine (20) drives a rotating spindle (27) with a grinding means.
8. Hand grinder according to claim 7, c h a r a c -t e r i z e d i n that the axis of rotation of the spindle (27) is substantially parallel to the longi-tudinal axes of the handles (25, 26).
9. Hand grinder according to claim 7 c h a r a c t e r i z e d i n that the spindle (27) is hollow, and that the machine (20) is built into the spindle (27).
10. Hand grinder according to claims 7 - 9, c h a r a c t e r i z e d i n that the hand grinder is provided with a safety guard (30) secured to the connecting part of the handle pipe (17), said guard (30) covering at least the rear part of the grinding means.
11. Hand grinder according to claims 7 - 9, c h a r a c t e r i z e d i n that the grinding means (28) comprises a plurality of circular slotted grinding discs (28) fixed co-axially around a spindle and secured by retaining discs (31).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK557582A DK157826C (en) | 1982-12-16 | 1982-12-16 | VALVE, PRINCIPLES FOR POSITIONING IN THE PIPE AIR CIRCULATION SUPPLY TO A CRAFT |
| DK5575/82 | 1982-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1219574A true CA1219574A (en) | 1987-03-24 |
Family
ID=8143625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000442988A Expired CA1219574A (en) | 1982-12-16 | 1983-12-09 | Hand grinder and valve therefor |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | USRE32575E (en) |
| JP (1) | JPS59131069A (en) |
| AT (1) | AT389269B (en) |
| CA (1) | CA1219574A (en) |
| CH (1) | CH661970A5 (en) |
| DE (1) | DE3310667C2 (en) |
| DK (1) | DK157826C (en) |
| FI (1) | FI77097C (en) |
| FR (1) | FR2538066B1 (en) |
| GB (1) | GB2133123B (en) |
| IT (1) | IT1167593B (en) |
| NL (1) | NL8304308A (en) |
| NO (1) | NO161700C (en) |
| SE (1) | SE454109B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2581911A1 (en) * | 1985-05-20 | 1986-11-21 | Pierrel Jean Marie | Hydraulically-driven angle-drive grinder with central water intake |
| DE3903781A1 (en) * | 1989-02-09 | 1990-08-16 | Festo Kg | Valve |
| DE4413560C2 (en) * | 1994-04-19 | 1998-02-12 | Lancier Masch Peter | Hydraulic control device for rescue equipment |
| DE19547408A1 (en) * | 1995-12-19 | 1997-07-03 | A B Elektronik Gmbh | Throttle-flap displacement control device for motor cycle |
| FR2803646B1 (en) * | 2000-01-07 | 2002-08-30 | Air Liquide | DRAIN VALVE OF A CONTAINER CONTAINING A FLUID AND ASSEMBLY CONSISTING OF THIS CONTAINER AND THIS DRAIN VALVE |
| DE10118332A1 (en) * | 2001-04-12 | 2002-10-17 | Hilti Ag | Side handle |
| US6655033B2 (en) * | 2001-10-16 | 2003-12-02 | Bettcher Indusrties, Inc. | Pneumatic hand tool with improved control valve |
| US20100132121A1 (en) * | 2006-04-19 | 2010-06-03 | Richard Chao | Support cushion for fast inflation and deflation |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US674971A (en) * | 1900-10-08 | 1901-05-28 | Edward N Hurley | Combined handle and throttle-valve for pneumatic tools. |
| US841322A (en) * | 1904-06-13 | 1907-01-15 | Edmund Hoxie | Throttle-valve. |
| US903451A (en) * | 1908-01-16 | 1908-11-10 | Charles Clark | Faucet. |
| US904134A (en) * | 1908-01-30 | 1908-11-17 | Charles J Day | Faucet. |
| US1298007A (en) * | 1918-07-10 | 1919-03-25 | Frederick K Daggett | Automatic check-valve for compressed-air drilling-machines. |
| US1356580A (en) * | 1919-07-05 | 1920-10-26 | Daniel P Witman | Safety air-valve |
| FR701988A (en) * | 1930-01-18 | 1931-03-26 | Tap | |
| FR823841A (en) * | 1936-07-04 | 1938-01-27 | Tap | |
| US2125554A (en) * | 1936-08-17 | 1938-08-02 | Imp Brass Mfg Co | Line valve |
| US2192459A (en) * | 1938-03-07 | 1940-03-05 | Robert K Taylor | Rotary surfacing tool |
| US2326396A (en) * | 1942-02-14 | 1943-08-10 | Chicago Pneumatic Tool Co | Safety governor for pneumatic tools |
| US2548923A (en) * | 1945-08-20 | 1951-04-17 | Frank J Walters | Rotary cleaning tool |
| US2670173A (en) * | 1948-07-06 | 1954-02-23 | St West Inc | Quick-acting shutoff valve having renewable valve seat |
| FR1379754A (en) * | 1963-10-16 | 1964-11-27 | Commissariat Energie Atomique | Waterproof faucet |
| US3775911A (en) * | 1972-01-24 | 1973-12-04 | Thor Power Tool Co | Dual safety control for a power tool |
| JPS52103434U (en) * | 1976-02-04 | 1977-08-05 |
-
1982
- 1982-12-16 DK DK557582A patent/DK157826C/en not_active IP Right Cessation
-
1983
- 1983-03-24 DE DE3310667A patent/DE3310667C2/en not_active Expired - Lifetime
- 1983-09-20 AT AT0334683A patent/AT389269B/en not_active IP Right Cessation
- 1983-10-13 CH CH5590/83A patent/CH661970A5/en not_active IP Right Cessation
- 1983-11-29 NO NO834376A patent/NO161700C/en not_active IP Right Cessation
- 1983-11-29 SE SE8306580A patent/SE454109B/en not_active IP Right Cessation
- 1983-12-06 IT IT24053/83A patent/IT1167593B/en active
- 1983-12-08 GB GB08332749A patent/GB2133123B/en not_active Expired
- 1983-12-09 CA CA000442988A patent/CA1219574A/en not_active Expired
- 1983-12-14 NL NL8304308A patent/NL8304308A/en not_active Application Discontinuation
- 1983-12-15 FI FI834619A patent/FI77097C/en not_active IP Right Cessation
- 1983-12-15 JP JP58235257A patent/JPS59131069A/en active Granted
- 1983-12-16 FR FR8320204A patent/FR2538066B1/en not_active Expired
-
1986
- 1986-08-05 US US06/893,389 patent/USRE32575E/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FI834619A0 (en) | 1983-12-15 |
| GB8332749D0 (en) | 1984-01-18 |
| JPH0549863B2 (en) | 1993-07-27 |
| DK157826B (en) | 1990-02-19 |
| DK557582A (en) | 1984-06-17 |
| ATA334683A (en) | 1989-04-15 |
| NO834376L (en) | 1984-06-18 |
| FR2538066A1 (en) | 1984-06-22 |
| DE3310667A1 (en) | 1984-06-20 |
| NO161700B (en) | 1989-06-05 |
| IT1167593B (en) | 1987-05-13 |
| NL8304308A (en) | 1984-07-16 |
| AT389269B (en) | 1989-11-10 |
| DE3310667C2 (en) | 1997-03-06 |
| CH661970A5 (en) | 1987-08-31 |
| GB2133123A (en) | 1984-07-18 |
| SE8306580D0 (en) | 1983-11-29 |
| NO161700C (en) | 1989-09-13 |
| IT8324053A0 (en) | 1983-12-06 |
| DK157826C (en) | 1990-09-24 |
| SE454109B (en) | 1988-03-28 |
| FR2538066B1 (en) | 1986-12-19 |
| FI77097B (en) | 1988-09-30 |
| USRE32575E (en) | 1988-01-12 |
| JPS59131069A (en) | 1984-07-27 |
| SE8306580L (en) | 1984-06-17 |
| FI834619A (en) | 1984-06-17 |
| GB2133123B (en) | 1986-04-09 |
| FI77097C (en) | 1989-01-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |