CA1049232A - Clamping device with tightening device - Google Patents
Clamping device with tightening deviceInfo
- Publication number
- CA1049232A CA1049232A CA247,138A CA247138A CA1049232A CA 1049232 A CA1049232 A CA 1049232A CA 247138 A CA247138 A CA 247138A CA 1049232 A CA1049232 A CA 1049232A
- Authority
- CA
- Canada
- Prior art keywords
- band
- apertures
- tightening device
- tubular member
- tightening
- 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
Landscapes
- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Clamps And Clips (AREA)
Abstract
CLAMPING DEVICE WITH TIGHTENING DEVICE
Abstract of the Disclosure Apparatus for clamping a tubular member onto a nipple includes a closable clamping band having a first set of apertures adjacent a first end of the band, and a band closing bar adjacent the second end of the band. This barb is engageable in one of the apertures to hold the band in closed position with the first end over-lapping the second end. There is a second set of apertures adjacent the second end of the band. A slot extends circumferentially along a portion of the band aligned with at least some of the apertures of the second set so that, when the band is placed about the tubular member, the apertures of the second set are engageable, through said slot, by one of two relatively movable parts of a band tightening device. A
support surface spaced from the first end of the band is provided for engagement by the other of the two movable parts of the tightening de-vice. At least one of the apertures of the second set is bounded at its edge furthest from the closing barb with a web having a radially out-wardly extending tensioning bulge which provides for reliable engage-ment by the one of the parts of the tightening device engaging the second set of apertures while limiting the radial inward penetration of such part so as to prevent damage to the tubular member being clamped.
Alternatively, when the tubular member is a hose, the said second end of the band can be curved radially outwardly with respect to the hose to be clamped for preventing cutting of thehose by the extreme end portion of the second end during tightening of the band.
Abstract of the Disclosure Apparatus for clamping a tubular member onto a nipple includes a closable clamping band having a first set of apertures adjacent a first end of the band, and a band closing bar adjacent the second end of the band. This barb is engageable in one of the apertures to hold the band in closed position with the first end over-lapping the second end. There is a second set of apertures adjacent the second end of the band. A slot extends circumferentially along a portion of the band aligned with at least some of the apertures of the second set so that, when the band is placed about the tubular member, the apertures of the second set are engageable, through said slot, by one of two relatively movable parts of a band tightening device. A
support surface spaced from the first end of the band is provided for engagement by the other of the two movable parts of the tightening de-vice. At least one of the apertures of the second set is bounded at its edge furthest from the closing barb with a web having a radially out-wardly extending tensioning bulge which provides for reliable engage-ment by the one of the parts of the tightening device engaging the second set of apertures while limiting the radial inward penetration of such part so as to prevent damage to the tubular member being clamped.
Alternatively, when the tubular member is a hose, the said second end of the band can be curved radially outwardly with respect to the hose to be clamped for preventing cutting of thehose by the extreme end portion of the second end during tightening of the band.
Description
104923~
The present invention relates to apparatus for clamping a tubular member onto a nipple lncluding a closable clamping band.
A clamp is known in the prior art which is provlded with a tightening device in the manner of a bayonnet-type joint which involves an expensive manufacture and is in-appropriate, especially if the clamp has to be installed and disassembled only infrequently. Another clamp is also known in the piror art in which the tightening takes place by means of a tong-like tool, the engaging end of which expands upon pressing together the actuating end. The attachment of the tool takes place, on the one hand, in a perforation aperture and, on the other, at the end of the slot. This type of tightening, however, entails the dls-advantage that the band thickness generally is only of the order of one millimeter so that the engaging surface for the tool is small. Added ~hereto is the fact that in addition to the pressing together of the actuating part of the tool, the latter has to be pressed with a certain force in a radial direction against the band, in which case a catching or getting stuck in the elastic hose material and a damage thereof has to be feared. Furthermore, such an operation requires the full attention of the working personnel, whence the observation and attention to the hooking-in of the barb into the correct perforation aperture necessarily suffers. With such a tightening device, the actuating part also has to have a certain length so that this tool cannot be used in all cases.
The clamps described hereinabove all include at least one element which is elastically yielding in the circumferential direction so that during the installation no excessively high forces have to be overcome. However, it - 1 - ~
may be desirable for example, for reasons of reducing the manu-facturing costs to give to the band a continuous flat shape throughout whereby the prestress existing in the assembled condition of the clamp is produced only by elastic deformation of the hose In that case, how-ever, quite considerable forces arise during the assembly, i. e,, during the tightening from perforation aperture to perforation aperature, which cannot be absorbed by the prior art tightening device adapted to be attached and removed. Furthermore, it must be borne in mind that though an assembly by means of the known tightening device might still 10 be realized, as such, in contrast thereto, a disassembly is no longer readily feasible after a lapse of some time since the clamp has worked itself into the elastic hose material, and as a result of dirt, heat influ-ence, etc., now sticks to the hose, so that the band or the ear-shaped spring or tensioning elements have to be cut open destructively whence the clamp can no longer be reused thereafter.
- The present invention is concerned with the task of over-coming these disadvantages and to provide a clamp which is adapted to be tightened to a very high degree and is repeatedly reusable, whereby the tightening device can be attached reliably also under unfavorable 20 space conditions, and more particularly in such a manner that the attach-ment and the actuation thereof can take place also at a certain distance from the clamp.
To this end, the invention consists of apparatus for clamping a tubular member onto a nipple including a closable clamping band, said closable clamping band comprising: a first set of perforation
The present invention relates to apparatus for clamping a tubular member onto a nipple lncluding a closable clamping band.
A clamp is known in the prior art which is provlded with a tightening device in the manner of a bayonnet-type joint which involves an expensive manufacture and is in-appropriate, especially if the clamp has to be installed and disassembled only infrequently. Another clamp is also known in the piror art in which the tightening takes place by means of a tong-like tool, the engaging end of which expands upon pressing together the actuating end. The attachment of the tool takes place, on the one hand, in a perforation aperture and, on the other, at the end of the slot. This type of tightening, however, entails the dls-advantage that the band thickness generally is only of the order of one millimeter so that the engaging surface for the tool is small. Added ~hereto is the fact that in addition to the pressing together of the actuating part of the tool, the latter has to be pressed with a certain force in a radial direction against the band, in which case a catching or getting stuck in the elastic hose material and a damage thereof has to be feared. Furthermore, such an operation requires the full attention of the working personnel, whence the observation and attention to the hooking-in of the barb into the correct perforation aperture necessarily suffers. With such a tightening device, the actuating part also has to have a certain length so that this tool cannot be used in all cases.
The clamps described hereinabove all include at least one element which is elastically yielding in the circumferential direction so that during the installation no excessively high forces have to be overcome. However, it - 1 - ~
may be desirable for example, for reasons of reducing the manu-facturing costs to give to the band a continuous flat shape throughout whereby the prestress existing in the assembled condition of the clamp is produced only by elastic deformation of the hose In that case, how-ever, quite considerable forces arise during the assembly, i. e,, during the tightening from perforation aperture to perforation aperature, which cannot be absorbed by the prior art tightening device adapted to be attached and removed. Furthermore, it must be borne in mind that though an assembly by means of the known tightening device might still 10 be realized, as such, in contrast thereto, a disassembly is no longer readily feasible after a lapse of some time since the clamp has worked itself into the elastic hose material, and as a result of dirt, heat influ-ence, etc., now sticks to the hose, so that the band or the ear-shaped spring or tensioning elements have to be cut open destructively whence the clamp can no longer be reused thereafter.
- The present invention is concerned with the task of over-coming these disadvantages and to provide a clamp which is adapted to be tightened to a very high degree and is repeatedly reusable, whereby the tightening device can be attached reliably also under unfavorable 20 space conditions, and more particularly in such a manner that the attach-ment and the actuation thereof can take place also at a certain distance from the clamp.
To this end, the invention consists of apparatus for clamping a tubular member onto a nipple including a closable clamping band, said closable clamping band comprising: a first set of perforation
-2 .~
1049;~32 apertures adjacent a first end of the band, at least one band closing barb adjacent the second end of the band, each closing barb being engageable in one of the perforation apertures of said first set to hold said band in a closed position with said first end overlapping said second end, a second set of apertures adjacent the second end of the band, a slot extending circumferentially along a portion of said band which slot is aligned with at least some of the apertures of said second set when said band is placed about said tubular member, said apertures of said second set being engageable, through said slot, with one of two relatively movable parts of a band tightening device, and supporting means spaced from the first end of the band for accommo-dating engagement of the other of the two movable parts oE the tightening device, wherein at least one of the apertures of said second set is bounded at the edge thereo furthest from said at least one closing barb with a web having a radially outwardly extending tensioning bulge, said tensioning bulge providing a reliable engagement thereat o the one of the parts of the tightening device engaging the second set of apertures while limiting the radial inward penetration of said one of the parts of the tightening device so as to prevent damage to the tubular member being clamped.
Other features and advantagesof embodiments o the pre-sent invention will become more apparent from the following description when taken in connection with the accompanying drawings. Other aspects of the apparatus disclosed are claimed in Canadian patent application Serial No. 168, 356 filed April 10, 1973, now Patent No. 988, 278.
April 10, 1973 of which the present application is a division.
Figure 1 is an elevational view, partly in cross section, of a band of a clamp ~aken in the axial direction and illustrating the clamp in the open condition;
Figure 2 is a partial plan view on the band according to Figure 1, taken ln the direction of the arrow Z:
Figure 3 is a partial cross-sectional view of an installed clamp with a band according to Figure 1 and with a tightening device attached thereto;
Figure 4 is a cross-sectional view through an assembled clamp with a modified embodiment of a tightening device and using a dif ferent band;
Figure S is a partial cross-sectional view of Figure 4, on, an enlar~ed scale;
Figurc G is a partial cross-sectional view of a modified embodiment of an assembled band with a still further modified embodiment of a tightening device, and Figure 7 is an elevational view of the tightening device of Figure 6 taken in the dircction at right angle to the view of Figure 6.
l~c~rcrring now to the drawing whercin likc rcfcrcncc numcrals are uscd througllout thc various views to designatc likc parts, the thickness of thc l~and is illustrated in all figures larger than in most actual cases for thesake of greater clarity.
Referring now to Figure 1, the band 1 includes an upper end 2 provided with the perforation apertures 3 as well as a lower end 4 provided with two barbs 5. When the band is placed about the hose 6 (Figure 3), the barbs 5 engage in two perforation apertures 3 of the upper end 2 of the band 1 as can also be seen clearly from Fiqure 3. The hose 6 surrounds a nipple 7. The band is provided at its lower end 4, on the side of the barb 5 nearer the end, with perforation apertures 8 of the same type, and at its upper end 2, displaced in the circumferential direction lQ toward the center of the band in relation to the perforation apertures 3 provided thereat, with a slot 9; after placing the band 1 about the hose 6 at least a section of the per-foration apertures 8 adjacent the lower end 4 are then located within the area of the section of the slot 9 adjacent the upper end 2 of the band. Furthermore, a tightening device 10 is provided which enables the barbs 5 to be hooked into the perforation apertures 3 corresponding to the assembled condition of the clamp. This tightening device 10 (Figure 3) is adapted to be attached onto the band 1 for the assembly and disassembly and is again removable after the assembly has taken place.
The upper end 2 of the band 1 is now provided with two barbs 11 pointing with the tips thereof in a direction opposite the tips of the barbs 5 of the lower end 4; the barbs 11 are thereby provided displaced in the circum-ferential direction toward the center with respect to the slot 9. The tightening device 10 is now provided with two coupling elements movable with respect to one another for purposes of tightening. One of the coupling elements thereby engages in at least one of the perforation apertures 8 of the lower end 4 of the band while the barbs 11 of the upper end 2 of the band engage in the other coupling element.
The lower end 4 of the band 1 is provided with an upwardly bent tongue 12 which is guided in the slot 9.
The tightening device 10 includes a lever 13, to which is rigidly connected a toothed wheel 14 having parallel tooth flanks, a pitch corresponding to the perforation apertures 3, 8, and an axis perpendicular to the axis of the lever 13. A short curved band 15 whose radius corresponds approximately to the radius of the hose 6, is pivotally connected at the lever 13 about the axis of the toothed wheel 14 and is provided at its free end 16 with two per-foration apertures 17!, whereby the barbs 11 of the upper end 2 of the band hook engage into the perforation apertures 17 of the short band 15iof the tightening device and, depending on the rotational position of the toothed wheel 14, one or two teeth thereof engage in one or two perforation apertures 8 of the lower end 4 of the band.
If the lever 13 is pivoted in the direction of the arrow X, then the upper end 2 of the band moves in the direction of the arrow Y relative to the lower band end, and the barbs 5 of the lower end 4 of the band can be hooked into those perforation apertures 3 of the upper end 2 of the band which correspond to the desired condition of tension of the band 1. A~ter this has taken place, the lever 13 is again pivoted in the opposite direction, the barbs 5 are reliably and securely hooked in, and the tightening device 10 can be removed. During the removal o~ the clamp, one will proceed analogously in reverse sequence.
The illustrated band 1 has a flat configuration.
The prestress existing in the assembled condition of the clamp is thereby produced only by the elastic deformation of the hose.
I'he band 15 of the tightenin~ device 10 iS provided with a slot, which is located between the perforation apertures 17 thereof and the toothed wheel 14 and which is not visible in the drawing, which serves for receiving the tongue 12 of the lower end 4 of the band.
The modulus of tl1e barbs 11 of the upper end 2 of the band 1 corresponds preferably to the modulus of the perforation apertures 3 and 8 as well as of thc b~rl~s 5. In this. manner, the same tools can be used which is of importancc in conncction with cost-savings.
The band 101 illustrated in Figure 4 corresponds at its upper and 10 at its lowcr end to the band of Figure 1, The tightening device 110 includes a slecvc 18 I?rovidcd with a longitudinal slot 19 and a threaded spindle 22 rotatul)lc thcrcin by means of a handle 20 and axially fixcd with rcspcct to the slccve 18. A countcr member 23 which is axially movable in the longitudinal slot 19 and non-rotatably guided with respect thereto is screwed over the threaded spindle 22. The sleeve 18 carries a lug 24. A ll-shaped profile member 25 is pivotal about a pin 26 which is extended through apertures in the legs of the profile member 25. A second aperture 27 in the profile member 25 enables the matching of the device to a band of different dimensions.
~he center portion of the profile member 25 is provided with two apertures 28.
20 ~he counter member 23 includes a hook 29 whose tip is directed toward the apcrturcs 28. The hook cngages in the perforation apcrture 8 adjacent the lowcr cnd ~ Or thc band, and thc barbs 11 of the upper end 2 of thc band engage in thc ar)crl;urcs 2~ Or thc lu6 25 fixed to thc sleeve 18.
The ti~htcning dcvice llO, once attached to thc band lOl and slightly ti~htcned, is seatcd extraordinarily securely on the assembled band or on the band only placed about the hose and can be finally adjusted thereafter by simple rotation of the handle 20 by the use of only one hand. It may be constructed in practice of any desired length, engages tangentially at the band and requires space only inr-a tangential direc-tion, as can be readily seen from ~igure 4.
The web 30 adjacent the lower end of 4 of the per-foration aperture 8, which is disposed adjacent to this lower end 4 of the band, is provided with a bulge in the upward direction, i.e., in the direction toward the upper end 2 of the band. This entails a reliable seating of the hook at the web of the corresponding perforatioh apreture without endangering the material of the hoee~by the tip of the hook.
The band 101 is provided altogether with four bulges 31, 32, 33 and 34 distributed over the circumference which for the sake of greater clari~ty, are shown in exaggerat-edly large size. The ear-shaped bulge 31 $S elastically deformable. The ear-shaped bulge 32 is adapted to~e~tens-ioned or tightened and is illustrated in the untensioned condi-tion. It is provided within the area of its crown or top withan indentation 35 which has an eliptical shape extend-ing in the circumferential direction of the band. The tensionable ear-shaped bulge 33 is illustrated in the tensioned or stressed condition. The band 101 is divided withln the area of the bulge 34. Each of the band ends 36 is provided with a perforation apeeture 37. These perforation apertures 37 are so positioned in overlapping relationship that theycoincide and are aligned with each other. A spring element 38 connecting the band ends which includes a ring-shaped center portion 39 and two flat end sections 40 is so inserted through the perforation apee-tures 37 and the end portions of the band extend in opposite directions on the outer surface of the hose 6 and the band ends 36 move toward one another during the tightening of the clamp. The center portion 39 accommodates an approximately cylindrical member ~1 of elastic material. The center portion 39 may be prov~ded with an indentation within the area of its top whether or not it accommodates the member 41.
The distribution of the bulges 31 to 34 at the cir-cumference depends on the requirements in practice, and the arrangement was represented in the drawing exclusively from a point of view of clarity. The tensionable bulge 32, for example, may be tightened with a tangential atta-chment of the tightening device 110 by radially engaging compressed air pliers. If a bulge is arranged at the upper end 2 of the band between the perforation apertures
1049;~32 apertures adjacent a first end of the band, at least one band closing barb adjacent the second end of the band, each closing barb being engageable in one of the perforation apertures of said first set to hold said band in a closed position with said first end overlapping said second end, a second set of apertures adjacent the second end of the band, a slot extending circumferentially along a portion of said band which slot is aligned with at least some of the apertures of said second set when said band is placed about said tubular member, said apertures of said second set being engageable, through said slot, with one of two relatively movable parts of a band tightening device, and supporting means spaced from the first end of the band for accommo-dating engagement of the other of the two movable parts oE the tightening device, wherein at least one of the apertures of said second set is bounded at the edge thereo furthest from said at least one closing barb with a web having a radially outwardly extending tensioning bulge, said tensioning bulge providing a reliable engagement thereat o the one of the parts of the tightening device engaging the second set of apertures while limiting the radial inward penetration of said one of the parts of the tightening device so as to prevent damage to the tubular member being clamped.
Other features and advantagesof embodiments o the pre-sent invention will become more apparent from the following description when taken in connection with the accompanying drawings. Other aspects of the apparatus disclosed are claimed in Canadian patent application Serial No. 168, 356 filed April 10, 1973, now Patent No. 988, 278.
April 10, 1973 of which the present application is a division.
Figure 1 is an elevational view, partly in cross section, of a band of a clamp ~aken in the axial direction and illustrating the clamp in the open condition;
Figure 2 is a partial plan view on the band according to Figure 1, taken ln the direction of the arrow Z:
Figure 3 is a partial cross-sectional view of an installed clamp with a band according to Figure 1 and with a tightening device attached thereto;
Figure 4 is a cross-sectional view through an assembled clamp with a modified embodiment of a tightening device and using a dif ferent band;
Figure S is a partial cross-sectional view of Figure 4, on, an enlar~ed scale;
Figurc G is a partial cross-sectional view of a modified embodiment of an assembled band with a still further modified embodiment of a tightening device, and Figure 7 is an elevational view of the tightening device of Figure 6 taken in the dircction at right angle to the view of Figure 6.
l~c~rcrring now to the drawing whercin likc rcfcrcncc numcrals are uscd througllout thc various views to designatc likc parts, the thickness of thc l~and is illustrated in all figures larger than in most actual cases for thesake of greater clarity.
Referring now to Figure 1, the band 1 includes an upper end 2 provided with the perforation apertures 3 as well as a lower end 4 provided with two barbs 5. When the band is placed about the hose 6 (Figure 3), the barbs 5 engage in two perforation apertures 3 of the upper end 2 of the band 1 as can also be seen clearly from Fiqure 3. The hose 6 surrounds a nipple 7. The band is provided at its lower end 4, on the side of the barb 5 nearer the end, with perforation apertures 8 of the same type, and at its upper end 2, displaced in the circumferential direction lQ toward the center of the band in relation to the perforation apertures 3 provided thereat, with a slot 9; after placing the band 1 about the hose 6 at least a section of the per-foration apertures 8 adjacent the lower end 4 are then located within the area of the section of the slot 9 adjacent the upper end 2 of the band. Furthermore, a tightening device 10 is provided which enables the barbs 5 to be hooked into the perforation apertures 3 corresponding to the assembled condition of the clamp. This tightening device 10 (Figure 3) is adapted to be attached onto the band 1 for the assembly and disassembly and is again removable after the assembly has taken place.
The upper end 2 of the band 1 is now provided with two barbs 11 pointing with the tips thereof in a direction opposite the tips of the barbs 5 of the lower end 4; the barbs 11 are thereby provided displaced in the circum-ferential direction toward the center with respect to the slot 9. The tightening device 10 is now provided with two coupling elements movable with respect to one another for purposes of tightening. One of the coupling elements thereby engages in at least one of the perforation apertures 8 of the lower end 4 of the band while the barbs 11 of the upper end 2 of the band engage in the other coupling element.
The lower end 4 of the band 1 is provided with an upwardly bent tongue 12 which is guided in the slot 9.
The tightening device 10 includes a lever 13, to which is rigidly connected a toothed wheel 14 having parallel tooth flanks, a pitch corresponding to the perforation apertures 3, 8, and an axis perpendicular to the axis of the lever 13. A short curved band 15 whose radius corresponds approximately to the radius of the hose 6, is pivotally connected at the lever 13 about the axis of the toothed wheel 14 and is provided at its free end 16 with two per-foration apertures 17!, whereby the barbs 11 of the upper end 2 of the band hook engage into the perforation apertures 17 of the short band 15iof the tightening device and, depending on the rotational position of the toothed wheel 14, one or two teeth thereof engage in one or two perforation apertures 8 of the lower end 4 of the band.
If the lever 13 is pivoted in the direction of the arrow X, then the upper end 2 of the band moves in the direction of the arrow Y relative to the lower band end, and the barbs 5 of the lower end 4 of the band can be hooked into those perforation apertures 3 of the upper end 2 of the band which correspond to the desired condition of tension of the band 1. A~ter this has taken place, the lever 13 is again pivoted in the opposite direction, the barbs 5 are reliably and securely hooked in, and the tightening device 10 can be removed. During the removal o~ the clamp, one will proceed analogously in reverse sequence.
The illustrated band 1 has a flat configuration.
The prestress existing in the assembled condition of the clamp is thereby produced only by the elastic deformation of the hose.
I'he band 15 of the tightenin~ device 10 iS provided with a slot, which is located between the perforation apertures 17 thereof and the toothed wheel 14 and which is not visible in the drawing, which serves for receiving the tongue 12 of the lower end 4 of the band.
The modulus of tl1e barbs 11 of the upper end 2 of the band 1 corresponds preferably to the modulus of the perforation apertures 3 and 8 as well as of thc b~rl~s 5. In this. manner, the same tools can be used which is of importancc in conncction with cost-savings.
The band 101 illustrated in Figure 4 corresponds at its upper and 10 at its lowcr end to the band of Figure 1, The tightening device 110 includes a slecvc 18 I?rovidcd with a longitudinal slot 19 and a threaded spindle 22 rotatul)lc thcrcin by means of a handle 20 and axially fixcd with rcspcct to the slccve 18. A countcr member 23 which is axially movable in the longitudinal slot 19 and non-rotatably guided with respect thereto is screwed over the threaded spindle 22. The sleeve 18 carries a lug 24. A ll-shaped profile member 25 is pivotal about a pin 26 which is extended through apertures in the legs of the profile member 25. A second aperture 27 in the profile member 25 enables the matching of the device to a band of different dimensions.
~he center portion of the profile member 25 is provided with two apertures 28.
20 ~he counter member 23 includes a hook 29 whose tip is directed toward the apcrturcs 28. The hook cngages in the perforation apcrture 8 adjacent the lowcr cnd ~ Or thc band, and thc barbs 11 of the upper end 2 of thc band engage in thc ar)crl;urcs 2~ Or thc lu6 25 fixed to thc sleeve 18.
The ti~htcning dcvice llO, once attached to thc band lOl and slightly ti~htcned, is seatcd extraordinarily securely on the assembled band or on the band only placed about the hose and can be finally adjusted thereafter by simple rotation of the handle 20 by the use of only one hand. It may be constructed in practice of any desired length, engages tangentially at the band and requires space only inr-a tangential direc-tion, as can be readily seen from ~igure 4.
The web 30 adjacent the lower end of 4 of the per-foration aperture 8, which is disposed adjacent to this lower end 4 of the band, is provided with a bulge in the upward direction, i.e., in the direction toward the upper end 2 of the band. This entails a reliable seating of the hook at the web of the corresponding perforatioh apreture without endangering the material of the hoee~by the tip of the hook.
The band 101 is provided altogether with four bulges 31, 32, 33 and 34 distributed over the circumference which for the sake of greater clari~ty, are shown in exaggerat-edly large size. The ear-shaped bulge 31 $S elastically deformable. The ear-shaped bulge 32 is adapted to~e~tens-ioned or tightened and is illustrated in the untensioned condi-tion. It is provided within the area of its crown or top withan indentation 35 which has an eliptical shape extend-ing in the circumferential direction of the band. The tensionable ear-shaped bulge 33 is illustrated in the tensioned or stressed condition. The band 101 is divided withln the area of the bulge 34. Each of the band ends 36 is provided with a perforation apeeture 37. These perforation apertures 37 are so positioned in overlapping relationship that theycoincide and are aligned with each other. A spring element 38 connecting the band ends which includes a ring-shaped center portion 39 and two flat end sections 40 is so inserted through the perforation apee-tures 37 and the end portions of the band extend in opposite directions on the outer surface of the hose 6 and the band ends 36 move toward one another during the tightening of the clamp. The center portion 39 accommodates an approximately cylindrical member ~1 of elastic material. The center portion 39 may be prov~ded with an indentation within the area of its top whether or not it accommodates the member 41.
The distribution of the bulges 31 to 34 at the cir-cumference depends on the requirements in practice, and the arrangement was represented in the drawing exclusively from a point of view of clarity. The tensionable bulge 32, for example, may be tightened with a tangential atta-chment of the tightening device 110 by radially engaging compressed air pliers. If a bulge is arranged at the upper end 2 of the band between the perforation apertures
3 and the barbs 11, then it is stressed in deformation, not during the tightening, but only after the removal of the tightening device.
The nipple 7 and the hose 8 as well as the upper end of the band 2 provided with the slot ~ and the lower end
The nipple 7 and the hose 8 as well as the upper end of the band 2 provided with the slot ~ and the lower end
4 of the band provided with the perforation apertures 8 can be seen from Figure 6.
The boundary wall of the slot 9 is now provided with-in the area of its surface pointing away from the upper end of the band 2 with a bulge 11 1, directed outwardly i.e., with a bulge extending upwardly.
The additional tightening device 112 is constructed strlp-shaped, whereby the working end 113 is slightly narrower than the width of the perforation apertures 8.
It can be readily seen from Figure 7 that the working end 113 is constructed as tongue which is slightly narDo-wer than the width of the perforation apertures 8 whereby ~ -8 -wings 114 are provided on both sides of the tongue which extend perpendicularly to the axis of the - 8a -strip and limit the depth of penetration of the working end 113 into the perforation apertures 8. By pivoting the end of the auxiliary tightening device 112 which is disposed opposite the working end 113, inhthe direction of the arrow Z, the two surfaces of the upper and of the lower end of the band, at which abuts the auxiliary tightening device, are moved away from one another and thus the band is tightened.
While I have shown a~d described several embodiments in accordance with the present invention, it is underst~d that the same is not ~imited thereto but is susceptible of numerous changes and modifications as known to those skilled in the art. For example, the clamp of the pres-ent inventionalso operates with kinematic reversal. To that end, the barbs 11 are provided between the slot 9 and the upper end 2 or the perforation apertures 3. It is then possible to contract the clamp in that the elements of the tightening device are moved away from one another instead of being moved toward one another.
Hence, I do not wish to be limited to the details shown and described herein, but intend to cover all such changes and modification as are encompassed by the scope of the appended claims.
The boundary wall of the slot 9 is now provided with-in the area of its surface pointing away from the upper end of the band 2 with a bulge 11 1, directed outwardly i.e., with a bulge extending upwardly.
The additional tightening device 112 is constructed strlp-shaped, whereby the working end 113 is slightly narrower than the width of the perforation apertures 8.
It can be readily seen from Figure 7 that the working end 113 is constructed as tongue which is slightly narDo-wer than the width of the perforation apertures 8 whereby ~ -8 -wings 114 are provided on both sides of the tongue which extend perpendicularly to the axis of the - 8a -strip and limit the depth of penetration of the working end 113 into the perforation apertures 8. By pivoting the end of the auxiliary tightening device 112 which is disposed opposite the working end 113, inhthe direction of the arrow Z, the two surfaces of the upper and of the lower end of the band, at which abuts the auxiliary tightening device, are moved away from one another and thus the band is tightened.
While I have shown a~d described several embodiments in accordance with the present invention, it is underst~d that the same is not ~imited thereto but is susceptible of numerous changes and modifications as known to those skilled in the art. For example, the clamp of the pres-ent inventionalso operates with kinematic reversal. To that end, the barbs 11 are provided between the slot 9 and the upper end 2 or the perforation apertures 3. It is then possible to contract the clamp in that the elements of the tightening device are moved away from one another instead of being moved toward one another.
Hence, I do not wish to be limited to the details shown and described herein, but intend to cover all such changes and modification as are encompassed by the scope of the appended claims.
Claims (2)
1. Apparatus for clamping a tubular member onto a nipple including a closable clamping band, said closable clamping band comprising:
a first set of perforation apertures adjacent a first end of the band, at least one band closing barb adjacent the second end of the band each closing barb being engageable in one of the perforation apertures of said first set to hold said band in a closed position with said first end overlapping said second end, a second set of apertures adjacent the second end of the band, a slot extending circumferentially along a portion of said band which slot is aligned with at least some of the apertures of said second set when said band is placed about said tubular member, said apertures of said second set being engageable, through said slot, with one of two relatively movable parts of a band tightening device, and supporting means spaced from the first end of the band for accommodating engagement of the other of the two movable parts of the tightening device, wherein at least one of the apertures of said second set is bounded at the edge thereof furthest from said at least one closing barb with a web having a radially outwardly extending tensioning bulge, said tensioning bulge providing a reliable engagement thereat of the one of the parts of the tightening device engaging the second set of apertures while limiting the radial inward penetration of said one of the parts of the tightening device so as to prevent damage to the tubular member being clamped.
a first set of perforation apertures adjacent a first end of the band, at least one band closing barb adjacent the second end of the band each closing barb being engageable in one of the perforation apertures of said first set to hold said band in a closed position with said first end overlapping said second end, a second set of apertures adjacent the second end of the band, a slot extending circumferentially along a portion of said band which slot is aligned with at least some of the apertures of said second set when said band is placed about said tubular member, said apertures of said second set being engageable, through said slot, with one of two relatively movable parts of a band tightening device, and supporting means spaced from the first end of the band for accommodating engagement of the other of the two movable parts of the tightening device, wherein at least one of the apertures of said second set is bounded at the edge thereof furthest from said at least one closing barb with a web having a radially outwardly extending tensioning bulge, said tensioning bulge providing a reliable engagement thereat of the one of the parts of the tightening device engaging the second set of apertures while limiting the radial inward penetration of said one of the parts of the tightening device so as to prevent damage to the tubular member being clamped.
2. Apparatus according to claim 1, wherein said tubular member is a hose, and wherein said second end of said band is curved radially outwardly with respect to a hose to be clamped for preventing cutting of said hose by the extreme end portion of said second end during tightening of the band.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH527372A CH561383A5 (en) | 1972-04-11 | 1972-04-11 | |
| CH1174472 | 1972-08-09 | ||
| CA168,356A CA988278A (en) | 1972-04-11 | 1973-04-10 | Clamping device with tightening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1049232A true CA1049232A (en) | 1979-02-27 |
Family
ID=27162702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA247,138A Expired CA1049232A (en) | 1972-04-11 | 1976-03-04 | Clamping device with tightening device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1049232A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117387989A (en) * | 2023-12-06 | 2024-01-12 | 遂宁鑫峰科技有限公司 | Automatic slicing sampler and sampling method for PCB (printed circuit board) |
-
1976
- 1976-03-04 CA CA247,138A patent/CA1049232A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117387989A (en) * | 2023-12-06 | 2024-01-12 | 遂宁鑫峰科技有限公司 | Automatic slicing sampler and sampling method for PCB (printed circuit board) |
| CN117387989B (en) * | 2023-12-06 | 2024-03-08 | 遂宁鑫峰科技有限公司 | Automatic slicing sampler and sampling method for PCB (printed circuit board) |
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