Tube clamp
First Claim
Patent Images
1. In clamping apparatus for supporting a metal tube from fixed structure, wherein (a) a split metal sleeve with raised end shoulders comprises identical interlocking halves of greater than 180°
- total extent such that each half has self-retaining snap-action assembly capability in respect of the same metal tube, and wherein (b) a fixedly mountable loop clamp surrounds the sleeve with axial play between the end shoulders, the loop clamping being so sized when clamped to said sleeve as to establish a predetermined frictional resistance to sleeve displacement with respect to said clamp, the improvement wherein each of the sleeve halves has a thin layer of friction material bonded thereto, said friction material comprising an uncured nitrite rubber-phenolic resin adhesive which incorporates its curing agents, the bore of the lined sleeve halves being compressed in engagement with the metal tube such that the frictional resistance to displacement of the sleeve on the metal tube is greater than the frictional resistance to sleeve displacement with respect to said clamp, said adhesive being curable to establish a bond of said sleeve to said metal tube in the presence of minimum ambient temperature in the order of 300°
F., whereby in aircraft application in the vicinity of an engine with ambient temperatures of at least 300°
F., where displacement accommodation of the sleeve on a metal tube is not desirable, said sleeve will become bonded to the metal tube upon operation of the engine; and
further whereby in aircraft application in wing or the like structure which is subject to flexure and which is characterized by lesser ambient temperatures, said sleeve will not become bonded to the metal tube but rather will remain capable of displacement on the metal tube for such unusual situations of axial play as the clamp-to-sleeve engagement will not accommodate.
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Accused Products
Abstract
The invention contemplates tube-clamp structure wherein a split wear sleeve is applied to a metal tube with such resistance to displacement along the tube that displacement wear is accommodated essentially only via the lesser displacement resistance which characterizes a limited axial range of support-clamp engagement around the sleeve. More particularly, the split sleeve has a bonded lining of friction material which contains heat-curable adhesive--so that in a sufficiently elevated ambient temperature environment, as in the vicinity of an aircraft engine, the sleeve will bond to the metal tube; and so that in a lesser ambient-temperature environment, as within an aircraft wing which is subject to flexure, the sleeve will not bond to the metal tube but rather will be displaceable on the metal tube only for such unusual situations of axial play as the clamp-to-sleeve engagement will not accommodate.
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Citations
4 Claims
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1. In clamping apparatus for supporting a metal tube from fixed structure, wherein (a) a split metal sleeve with raised end shoulders comprises identical interlocking halves of greater than 180°
- total extent such that each half has self-retaining snap-action assembly capability in respect of the same metal tube, and wherein (b) a fixedly mountable loop clamp surrounds the sleeve with axial play between the end shoulders, the loop clamping being so sized when clamped to said sleeve as to establish a predetermined frictional resistance to sleeve displacement with respect to said clamp, the improvement wherein each of the sleeve halves has a thin layer of friction material bonded thereto, said friction material comprising an uncured nitrite rubber-phenolic resin adhesive which incorporates its curing agents, the bore of the lined sleeve halves being compressed in engagement with the metal tube such that the frictional resistance to displacement of the sleeve on the metal tube is greater than the frictional resistance to sleeve displacement with respect to said clamp, said adhesive being curable to establish a bond of said sleeve to said metal tube in the presence of minimum ambient temperature in the order of 300°
F., whereby in aircraft application in the vicinity of an engine with ambient temperatures of at least 300°
F., where displacement accommodation of the sleeve on a metal tube is not desirable, said sleeve will become bonded to the metal tube upon operation of the engine; and
further whereby in aircraft application in wing or the like structure which is subject to flexure and which is characterized by lesser ambient temperatures, said sleeve will not become bonded to the metal tube but rather will remain capable of displacement on the metal tube for such unusual situations of axial play as the clamp-to-sleeve engagement will not accommodate.
- total extent such that each half has self-retaining snap-action assembly capability in respect of the same metal tube, and wherein (b) a fixedly mountable loop clamp surrounds the sleeve with axial play between the end shoulders, the loop clamping being so sized when clamped to said sleeve as to establish a predetermined frictional resistance to sleeve displacement with respect to said clamp, the improvement wherein each of the sleeve halves has a thin layer of friction material bonded thereto, said friction material comprising an uncured nitrite rubber-phenolic resin adhesive which incorporates its curing agents, the bore of the lined sleeve halves being compressed in engagement with the metal tube such that the frictional resistance to displacement of the sleeve on the metal tube is greater than the frictional resistance to sleeve displacement with respect to said clamp, said adhesive being curable to establish a bond of said sleeve to said metal tube in the presence of minimum ambient temperature in the order of 300°
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2. In clamping apparatus for supporting a metal tube from fixed structure, wherein a split metal sleeve is applied to the metal tube and a fixedly mountable loop clamp surrounds the sleeve, the loop clamp being so sized when clamped to said sleeve as to establish a predetermined frictional resistance to sleeve displacement with respect to said clamp, the improvement wherein each of the sleeve halves has a thin layer of friction material bonded thereto, said friction material having incorporated therein an uncured thermosetting resin adhesive, the resin adhesive being selected for ability to cure at a minimum ambient temperature of about 300°
- F. and to withstand temperatures well in excess of 300°
F. - View Dependent Claims (3, 4)
- F. and to withstand temperatures well in excess of 300°
Specification
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Current AssigneeTransdigm Incorporated (Transdigm Group Incorporated)
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Original AssigneeTransamerica Delaval. Inc. (Enovis Corp.)
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InventorsAllen, Walter E., Wilson, Douglas D.
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Primary Examiner(s)Schultz, William H.
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Assistant Examiner(s)Ramirez, Ramon O.
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Application NumberUS06/285,401Time in Patent Office729 DaysField of Search248/74 R, 248/74 B, 248/70, 248/68 R, 248/60, 248/56, 248/55, 285/DIG. 16, 285/419, 285/373, 156/306.9, 156/331.2US Class Current248/74.1CPC Class CodesF16L 3/18 allowing movement in axial ...
