A vent assembly connectable to a transmission housing includes a stem, a membrane and a cap. The stem has an annular flange, a first end, a second end, and a through bore extending between the first end and the second end. The first end is connectable to the transmission housing and the second end h
A vent assembly connectable to a transmission housing includes a stem, a membrane and a cap. The stem has an annular flange, a first end, a second end, and a through bore extending between the first end and the second end. The first end is connectable to the transmission housing and the second end has at least one flange and an annular rim. The membrane is located on the second end of the stem over the bore. The cap has a base and an annular wall extending from the base. The annular wall of the cap is deformed at a terminal end against the annular flange of the stem at discrete locations, where an undeformed portion of the annular wall of the cap creates at least one channel axially extending along the stem. The at least one channel creates a path between the cap and the flange of the stem.
대표청구항▼
1. A vent assembly connectable to a transmission housing, comprising: a stem having a first end, a second end, an annular flange, and a through bore extending between the first end and the second end, wherein the first end is adapted to be attached to the transmission housing, and the second end has
1. A vent assembly connectable to a transmission housing, comprising: a stem having a first end, a second end, an annular flange, and a through bore extending between the first end and the second end, wherein the first end is adapted to be attached to the transmission housing, and the second end has at least one flange and an annular rim, wherein the at least one flange projects axially from the annular rim, and wherein the annular flange is disposed around an outer surface of the stem proximate the second end;a membrane located on the second end of the stem over the bore, wherein the at least one flange positions the membrane over the bore; anda cap having a base and an annular wall extending from the base to a terminal end, wherein the base of the cap covers the second end of the stem, wherein the annular wall of the cap is deformed at the terminal end against the annular flange of the stem at discrete locations, and wherein an undeformed portion of the annular wall of the cap creates at least one axially extending channel,wherein the at least one channel creates a path between the cap and the annular flange of the stem that allows fluid to exit the cap and substantially prevents fluid from re-entering the cap. 2. The vent assembly of claim 1 wherein at least one secondary channel is located on the annular rim, wherein the at least one secondary channel creates a pathway for fluid accumulated on the membrane to drain over the annular rim and out of the cap. 3. The vent assembly of claim 1 wherein the at least one flange includes a locator that projects from the annular rim, wherein the locator is positioned around an outer perimeter of the at least one flange, and wherein the locator further positions the membrane over the bore. 4. The vent assembly of claim 1 wherein the cap is deformed against the stem along discrete locations to create four equally spaced channels. 5. The vent assembly of claim 1 wherein the at least one flange holds the cap off the annular rim, thereby substantially preventing the cap from closing off the bore of the stem. 6. The vent assembly of claim 1 wherein the second end of the stem includes four equally spaced flanges. 7. The vent assembly of claim 1 wherein the first end of the stem is one of press fit and threaded into an aperture formed in a wall of the transmission housing. 8. The vent assembly of claim 1 wherein the membrane is constructed from PTFE. 9. The vent assembly of claim 1 wherein the membrane has a circular outer profile. 10. The vent assembly of claim 1 wherein the membrane is adhered to an outer surface of the stem. 11. The vent assembly of claim 1 wherein the membrane operates as a selective barrier allowing the passage of air in and out of and blocking the passage of fluid and steam into the bore of the stem. 12. The vent assembly of claim 1 wherein the transmission housing includes a wall that defines a cavity, wherein the vent assembly operates to vent air in and out of the cavity and substantially prevents fluid from entering the cavity. 13. The vent assembly of claim 1 wherein the cap is one of a jiggle cap and a vent cap. 14. A vent assembly, comprising: a transmission housing having a wall defining an aperture, and wherein the wall defines a transmission housing cavity;a stem having a first end, a second end, an annular flange, and a through bore extending between the first end and the second end, wherein the first end is attached to the aperture defined by the wall of the transmission housing, and the second end has at least one flange and an annular rim, wherein the at least one flange projects axially from the annular rim, and wherein the annular flange is disposed around an outer surface of the stem proximate the second end;a membrane located on the second end of the stem over the bore, wherein the at least one flange positions the membrane over the bore, and wherein the membrane operates as a selective barrier allowing the passage of air in and out of and blocking the passage of fluid and steam into the bore of the stem; anda cap having a base and an annular wall extending from the base to a terminal end, wherein the base of the cap covers the second end of the stem, wherein the annular wall of the cap is deformed at the terminal end against the annular flange of the stem at discrete locations, and wherein an undeformed portion of the annular wall of the cap creates at least one primary, axially extending channel,wherein the at least one primary channel creates a path between the cap and the annular flange of the stem that allows fluid to exit the cap and substantially prevents fluid from re-entering the cap;wherein at least one secondary channel is located on the annular rim, wherein the at least one secondary channel creates a pathway for fluid accumulated on the membrane to drain over the annular rim and out of the cap;wherein the at least one flange holds the cap off the annular rim, thereby substantially preventing the cap from closing off the bore of the stem, andwherein the vent assembly operates to vent air in and out of and substantially prevents fluid from entering the cavity of the transmission housing. 15. The vent assembly of claim 14 wherein the at least one flange includes a locator that projects from the annular rim, wherein the locator is positioned around an outer perimeter of the at least one flange, and wherein the locator further positions the membrane over the bore. 16. The vent assembly of claim 14 wherein the second end of the stem includes four equally spaced flanges. 17. The vent assembly of claim 14 wherein the cap is deformed against the stem along discrete locations to create four equally spaced primary channels. 18. The vent assembly of claim 14 wherein the membrane is constructed from PTFE. 19. The vent assembly of claim 14 wherein the membrane is adhered to an outer surface of the stem. 20. A vent assembly, comprising: a transmission housing having a wall defining an aperture, and wherein the wall defines a transmission housing cavity;a stem having a first end, a second end, an annular flange, and a through bore extending between the first end and the second end, wherein the first end is attached to the aperture defined by the wall of the transmission housing, and the second end has four equally spaced flanges and an annular rim, wherein the flanges project from the annular rim, and wherein the annular flange is disposed around an outer surface of the stem proximate the second end;a membrane constructed from PTFE located on the second end of the stem over the bore, wherein the flanges position the membrane over the bore, and wherein the membrane operates as a selective barrier allowing the passage of air in and out of and blocking the passage of fluid and steam into the bore of the stem; anda metal cap having a base and an annular wall extending from the base to a terminal end, wherein the base of the cap covers the second end of the stem, wherein the annular wall of the cap is deformed at the terminal end against the annular flange of the stem at discrete locations, and wherein undeformed portions of the annular wall of the cap create four equally spaced, axially extending primary channels,wherein the primary channels create a path between the cap and the annular flange of the stem that allows fluid to exit the cap and substantially prevents fluid from re-entering the cap,wherein four secondary channels are located on the annular rim, wherein the secondary channels create a pathway for fluid accumulated around on the membrane to drain over the annular rim and out of the cap;wherein the flanges hold the cap off the annular rim, thereby substantially preventing the cap from closing off the bore of the stem, wherein the at least one flange includes a locator that projects from the annular rim, wherein the locator is positioned around an outer perimeter of the at least one flange, and wherein the locator further positions the membrane over the bore, andwherein the vent assembly operates to vent air in and out of and substantially prevents fluid from entering the cavity of the transmission housing.
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이 특허에 인용된 특허 (3)
James Allen Raszkowski ; Conrad L. Rockey, Transmission vent assembly.
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