Lubricant-free elastomeric gasket
First Claim
Patent Images
1. In an elastomeric gasket for incorporation into a segmented pipe coupling comprised of arcuate coupling segments, said elastomeric gasket being of an arcuate length greater than the arcuate length of a said arcuate coupling segment and having at least one sealing lip extending in a generally axially direction on a radially inner surface thereof, the improvement comprising:
- a first portion of said sealing lip of a first radius intermediate the ends of said gasket; and
,second portions of said sealing lip extending between the ends of said first portion and the respective ends of said gasket, each said second portion being of a radius greater than said first portion, and, at least equal in radius to the external radius of a pipe for which the segmented pipe coupling is intended;
whereby said elastomeric gasket can be positioned over a said intended pipe in the substantial absence of frictional engagement with said pipe.
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Accused Products
Abstract
A gasket for use in a segmented pipe coupling has portions at its ends of greater radius than the radius of the portion intermediate the ends, thus enabling the pipe coupling to be applied to a pipe in the absence of lubricants.
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Citations
21 Claims
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1. In an elastomeric gasket for incorporation into a segmented pipe coupling comprised of arcuate coupling segments, said elastomeric gasket being of an arcuate length greater than the arcuate length of a said arcuate coupling segment and having at least one sealing lip extending in a generally axially direction on a radially inner surface thereof, the improvement comprising:
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a first portion of said sealing lip of a first radius intermediate the ends of said gasket; and
,second portions of said sealing lip extending between the ends of said first portion and the respective ends of said gasket, each said second portion being of a radius greater than said first portion, and, at least equal in radius to the external radius of a pipe for which the segmented pipe coupling is intended; whereby said elastomeric gasket can be positioned over a said intended pipe in the substantial absence of frictional engagement with said pipe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In an elastomeric gasket segment for incorporation into a segmented pipe coupling comprised of arcuate coupling segments, said elastomeric gasket segment being of greater arcuate extent than the arcuate extent of a said coupling segment, and having at least one sealing lip extending in a generally axial direction on a radially inner surface thereof, the improvement comprising:
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a first portion of said sealing lip of a first radius intermediate the ends of said gasket segment; and
,second portions of said sealing lip extending between the ends of said first portion and the respective ends of said gasket segment, each said second portion being of a radius greater than said first radius, and at least equal in radius to the external radius of a pipe for which the segmented pipe coupling is intended; whereby said elastomeric gasket segment can be positioned over a said intended pipe in the substantial absence of frictional engagement with said pipe. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A segmented pipe coupling comprised of plural arcuate coupling segments, traction means for moving said arcuate coupling segments into clamping engagement with a pipe end, and at least one elastomeric gasket positioned within said coupling segments and for sealing engagement with the exterior surface of a pipe of an external diameter for which said segmented pipe coupling is intended, characterized by:
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a sealing lip having first portion of a first radius intermediate the ends of said gasket; and
,second portions of said sealing lip extending between the ends of said first portion and the respective ends of said gasket, each said second portion being of a radius greater than said first radius, and, at least equal in radius to the external radius of a pipe for which the segmented pipe coupling is intended; whereby said segmented pipe coupling can be installed over an intended pipe in the substantial absence of frictional engagement of the ends of said elastomeric gasket with said pipe. - View Dependent Claims (20, 21)
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Specification