GB2161531A - Pipe clamp - Google Patents

Pipe clamp Download PDF

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Publication number
GB2161531A
GB2161531A GB08417991A GB8417991A GB2161531A GB 2161531 A GB2161531 A GB 2161531A GB 08417991 A GB08417991 A GB 08417991A GB 8417991 A GB8417991 A GB 8417991A GB 2161531 A GB2161531 A GB 2161531A
Authority
GB
United Kingdom
Prior art keywords
channel
clamp
strap
bolt
base
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.)
Withdrawn
Application number
GB08417991A
Other versions
GB8417991D0 (en
Inventor
Clement John Richards
John Terence Gillard
John Anthony Green
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TERRY OF REDDITCH Ltd
Original Assignee
TERRY OF REDDITCH Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TERRY OF REDDITCH Ltd filed Critical TERRY OF REDDITCH Ltd
Priority to GB08417991A priority Critical patent/GB2161531A/en
Publication of GB8417991D0 publication Critical patent/GB8417991D0/en
Publication of GB2161531A publication Critical patent/GB2161531A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
    • F16B2/10—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using pivoting jaws
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/04—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means comprising a collar or ring having a threaded pin rigid with the pipe-encircling member

Abstract

The clamp shown in Fig. 1 is particularly intended for vehicle exhaust pipes and has a sheet metal channel section base with sidewalls 10 and a strap curved at 22 to encircle the pipe to clamp it with the base. The strap is hinged to the channel by having a hooked end 26 extending through a slot in the base, and at the opposite end of the strap and base the parts are held together by a nut and bolt. <IMAGE>

Description

SPECIFICATION Clamp This invention relates to clamps and has for its object to provide a clamp particularly for exhaust pipes and other circular cross section members, which is particularly cheap and efficient to manufacture and instal whilst also being efficient in use.
According to the invention a clamp comprises first and second components, the first being of channel section, the base of the channel having a slot extending transversely near one end and a bolt hole located near the other end the second of the components being a strap having a hooked end extending through said slot to render the strap at least semi-captive to the channel, and a bolt hole in its other end, the shape of the free edges of the side walls of the first component and the shape of the strap being such that when a bolt is passed through the two bolt holes and is tightened, an article (for which the clamp has been designed) which is in the clamp may be gripped about substantially its entire periphery.
The invention is more particularly described with reference to the accompanying drawings showing a preferred embodiment, in which Figure 1 is a side elevation of an assembled clamp in an untightened condition, Figure 2 is a plan taken in the direction of the arrow A and showing one of the components of the clamp only; Figure 3 is a view in the direction of the arrow B Fig. 1; Figure 4 shows an assembly step; and Figure 5 is an elevation of the second component of the clamp.
Referring to the drawings, the clamp comprises a first component or channel which is made as a pressing or forging from metal sheet or plate. The channel has a pair of side wall 10 with (in this instance, since the clamp is designed for use with a circular cross section tube) semi-circular cut outs generally indicated by the reference numeral 1 2 Fig. 1 in each of the side walls 10. The base of channel 14 has a bolt hole 16 at one end and a slot 18 near the other end. A small portion of the base 14 is cut away at 20 at the slotted end.
The second component is a strap made of the same kind of material as the channel having an arcuate portion 22, an outturned lug 24 at its free end, the lug also being provided with a bolt hole, and having the opposite end to the lug formed into a hook 26. As best seen in Fig. 5, the hook comprises a portion 28 bent generally at right angles to a connector part 30 which extends between the hook and the arcuate part 22, and a curved end part 32. The gap 34 between the free end of the part 32 and the adjacent part of the connector 30 maybe of smaller dimension than the portion at the base of the channel 14 which lies between the slot 18 and the cutaway 20. That piece is identified by the reference numeral 36, and reference should be made to Figs. 2 and 5 in these respects. The purpose of making that gap smaller is to make the strap semi-captive to the channel.By semi-captive is meant that the strap can only be detached from (and equally assembled to) the channel when turned into one particular position, and Fig. 4 shows the strap having been moved in the direction of the arrow C arcuately from that position shortly after having been assembled to the channel. Of course the strap could be more, or less, captive, but this degree of captivity is optimal in efficiency. That is to say, the strap can be easily engaged with the channel, albeit only in one angular position of the parts.
Either or both of the bolt holes can be made as slots opening to the free end edge of the lug 24 or the channel base 14 respectively if there is no danger of the bolt slipping out in use, which will depend upon the angle of the bolt in the finally adjusted position. It will be appreciated from consideration of Fig. 1, that as the nut is tightened on the bolt, to swing the strap so as to close the aperture in the clamp, the angle of the bolt relative to the base of the channel will vary. In the illustrated position of Fig. 1 for example the bolt hole in the strap could be made as an open ended slot without problems. However it is preferred to make a hole and not a slot in the lug 24, and use the abutment of the bolt head with the arcuate portion 22 as an anti-rotation hold on the bolt.
In tests it has been found that two vehicle exhaust pipe parts telescopically engaged, and clamped by a clamp as shown in the drawings, were gas-tight at the joint owing to the efficiency of the clamp.
1. A clamp comprising first and second components the first being of channel section the base of the channel having a slot extending transversely near one end of the channel and a bolt hole located near the other end the second of the components being a strap having a hooked end extending through said slot to render the strap at least semi-captive to the channel, and a bolt hole in its other end, the shape of the free edges of the side walls of the first component and the shape of the strap being such that when a bolt is passed through the two bolt holes and is tightened, an article (for which the clamp has been designed) may be clamped about substantially its entire periphery.
2. A clamp as claimed in claim 1 wherein the strap is semi-captive to the channel.
3. A clamp substantially as described with
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Clamp This invention relates to clamps and has for its object to provide a clamp particularly for exhaust pipes and other circular cross section members, which is particularly cheap and efficient to manufacture and instal whilst also being efficient in use. According to the invention a clamp comprises first and second components, the first being of channel section, the base of the channel having a slot extending transversely near one end and a bolt hole located near the other end the second of the components being a strap having a hooked end extending through said slot to render the strap at least semi-captive to the channel, and a bolt hole in its other end, the shape of the free edges of the side walls of the first component and the shape of the strap being such that when a bolt is passed through the two bolt holes and is tightened, an article (for which the clamp has been designed) which is in the clamp may be gripped about substantially its entire periphery. The invention is more particularly described with reference to the accompanying drawings showing a preferred embodiment, in which Figure 1 is a side elevation of an assembled clamp in an untightened condition, Figure 2 is a plan taken in the direction of the arrow A and showing one of the components of the clamp only; Figure 3 is a view in the direction of the arrow B Fig. 1; Figure 4 shows an assembly step; and Figure 5 is an elevation of the second component of the clamp. Referring to the drawings, the clamp comprises a first component or channel which is made as a pressing or forging from metal sheet or plate. The channel has a pair of side wall 10 with (in this instance, since the clamp is designed for use with a circular cross section tube) semi-circular cut outs generally indicated by the reference numeral 1 2 Fig. 1 in each of the side walls 10. The base of channel 14 has a bolt hole 16 at one end and a slot 18 near the other end. A small portion of the base 14 is cut away at 20 at the slotted end. The second component is a strap made of the same kind of material as the channel having an arcuate portion 22, an outturned lug 24 at its free end, the lug also being provided with a bolt hole, and having the opposite end to the lug formed into a hook 26. As best seen in Fig. 5, the hook comprises a portion 28 bent generally at right angles to a connector part 30 which extends between the hook and the arcuate part 22, and a curved end part 32. The gap 34 between the free end of the part 32 and the adjacent part of the connector 30 maybe of smaller dimension than the portion at the base of the channel 14 which lies between the slot 18 and the cutaway 20. That piece is identified by the reference numeral 36, and reference should be made to Figs. 2 and 5 in these respects. The purpose of making that gap smaller is to make the strap semi-captive to the channel.By semi-captive is meant that the strap can only be detached from (and equally assembled to) the channel when turned into one particular position, and Fig. 4 shows the strap having been moved in the direction of the arrow C arcuately from that position shortly after having been assembled to the channel. Of course the strap could be more, or less, captive, but this degree of captivity is optimal in efficiency. That is to say, the strap can be easily engaged with the channel, albeit only in one angular position of the parts. Either or both of the bolt holes can be made as slots opening to the free end edge of the lug 24 or the channel base 14 respectively if there is no danger of the bolt slipping out in use, which will depend upon the angle of the bolt in the finally adjusted position. It will be appreciated from consideration of Fig. 1, that as the nut is tightened on the bolt, to swing the strap so as to close the aperture in the clamp, the angle of the bolt relative to the base of the channel will vary. In the illustrated position of Fig. 1 for example the bolt hole in the strap could be made as an open ended slot without problems. However it is preferred to make a hole and not a slot in the lug 24, and use the abutment of the bolt head with the arcuate portion 22 as an anti-rotation hold on the bolt. In tests it has been found that two vehicle exhaust pipe parts telescopically engaged, and clamped by a clamp as shown in the drawings, were gas-tight at the joint owing to the efficiency of the clamp. CLAIMS
1. A clamp comprising first and second components the first being of channel section the base of the channel having a slot extending transversely near one end of the channel and a bolt hole located near the other end the second of the components being a strap having a hooked end extending through said slot to render the strap at least semi-captive to the channel, and a bolt hole in its other end, the shape of the free edges of the side walls of the first component and the shape of the strap being such that when a bolt is passed through the two bolt holes and is tightened, an article (for which the clamp has been designed) may be clamped about substantially its entire periphery.
2. A clamp as claimed in claim 1 wherein the strap is semi-captive to the channel.
3. A clamp substantially as described with reference to the accompanying drawings.
GB08417991A 1984-07-14 1984-07-14 Pipe clamp Withdrawn GB2161531A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08417991A GB2161531A (en) 1984-07-14 1984-07-14 Pipe clamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08417991A GB2161531A (en) 1984-07-14 1984-07-14 Pipe clamp

Publications (2)

Publication Number Publication Date
GB8417991D0 GB8417991D0 (en) 1984-08-15
GB2161531A true GB2161531A (en) 1986-01-15

Family

ID=10563915

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08417991A Withdrawn GB2161531A (en) 1984-07-14 1984-07-14 Pipe clamp

Country Status (1)

Country Link
GB (1) GB2161531A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB942651A (en) * 1958-08-21 1963-11-27 Boulton Scaffolding Ltd Improvements in or relating to scaffold couplings
GB2094385A (en) * 1981-03-05 1982-09-15 Terry Herbert & Sons Ltd Exhaust clamp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB942651A (en) * 1958-08-21 1963-11-27 Boulton Scaffolding Ltd Improvements in or relating to scaffold couplings
GB2094385A (en) * 1981-03-05 1982-09-15 Terry Herbert & Sons Ltd Exhaust clamp

Also Published As

Publication number Publication date
GB8417991D0 (en) 1984-08-15

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)