Coupling gasket with multiple sealing surfaces
View Patent ↗An annular gasket includes an annular body; an annular body; a pair of sealing ribs each extending substantially radially inwardly from the annular body and having an innermost radial extent; and at least one center rib extending substantially radially inwardly from the annular body, the at least one center rib having an innermost radial extent closer to the annular body than the innermost radial extent of each of the pair of sealing ribs.
1. An annular gasket comprising:
an annular body;
a pair of sealing ribs each extending substantially radially inwardly from the annular body and having a sealing ridge at a radially inward end of each of the pair of sealing ribs, each sealing ridge of the pair of sealing ribs including a cylindrical sealing surface at an innermost radial extent in an uncompressed state, each sealing ridge of the pair of sealing ribs including an axially outer drafted edge and an axially inner drafted edge, each sealing surface extending from the axially outer drafted edge to the axially inner drafted edge, each axially outer drafted edge extending axially outward and radially outward from the cylindrical sealing surface at a non-zero angle from a radial direction, each axially inner drafted edge of the pair of sealing ribs extending axially inward and radially outward from the cylindrical sealing surface at a non-zero angle from a radial direction, each sealing rib including an axially outer surface, each axially outer drafted edge of the pair of sealing ribs extending from the cylindrical sealing surface to the axially outer surface, each sealing rib increasing in axial thickness from radially outside to radially inside; and
at least one center rib extending substantially radially inwardly from the annular body, the at least one center rib having an innermost radial extent closer to the annular body than the innermost radial extent of each of the pair of sealing ribs and having a diameter at the innermost radial extent that is larger than a diameter of the innermost radial extent of each of the pair of sealing ribs.
2. The gasket of claim 1 , wherein the at least one center rib includes a central groove.
3. The gasket of claim 1 , wherein the at least one center rib includes at least one sealing surface.
4. The gasket of claim 3 , wherein the at least one center rib includes two sealing surfaces.
5. The gasket of claim 3 , wherein the annular body, the at least one center rib, and the pair of sealing ribs define a pair of gasket channels.
6. The gasket of claim 1 , wherein the pair of sealing ribs extend from side portions of the annular body.
7. The gasket of claim 1 , wherein the sealing ridge of each of the pair of sealing ribs extends substantially axially inwardly from the radially inward end of each of the pair of sealing ribs.
8. The gasket of claim 1 , wherein the sealing surfaces of the pair of sealing ribs are coannular in an uncompressed state.
9. The gasket of claim 1 , wherein the annular body includes a radially outer surface, wherein the radially outer surface includes a deformation groove.
10. The gasket of claim 1 , wherein each axial outer surface of the pair of sealing ribs is angled with respect to a radial direction of the gasket.
11. The gasket of claim 10 , wherein each axial outer surface is between nineteen and twenty-two degrees with respect to the radial direction of the gasket.
12. The gasket of claim 1 , wherein each axial outer surface of the pair of sealing ribs extends from the axially outer drafted edge to a radially outer surface of the annular body.
13. The gasket of claim 1 , wherein the center rib includes a central groove and two sealing members, and wherein each sealing member includes a sealing surface.
14. The gasket of claim 13 , wherein each sealing member is a protrusion from the central groove.
15. The gasket of claim 1 , wherein the center rib decreases in thickness as the center rib extends radially inwardly.