IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0409345
(2012-03-01)
|
등록번호 |
US-8656840
(2014-02-25)
|
발명자
/ 주소 |
- Borowski, Andrew J.
- Degutis, Alex V.
- Oestermeyer, David A.
|
출원인 / 주소 |
|
대리인 / 주소 |
Leydig, Voit & Mayer, Ltd.
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
13 |
초록
▼
A gasket for a railroad car manway nozzle and cover includes an inner leg portion and an outer leg portion joined by a generally planar annular body portion defining an upper annular cover sealing surface and a lower annular nozzle body sealing surface. Concentric annular chevrons are formed on the
A gasket for a railroad car manway nozzle and cover includes an inner leg portion and an outer leg portion joined by a generally planar annular body portion defining an upper annular cover sealing surface and a lower annular nozzle body sealing surface. Concentric annular chevrons are formed on the upper and lower annular sealing surfaces. In one form, the chevrons have a uniform height relative to the upper and lower sealing surfaces. In a modified form, the height of the chevrons varies relative to the surfaces from the which they extend. The height of the chevrons is a minimum where the gasket is radially aligned with cover clamping bolts and a maximum at radial locations midway between clamping bolts. A tab depending from the outer leg portion provides visual verification of the presence of the gasket.
대표청구항
▼
1. A gasket for sealing between the manway nozzle of a containment vessel and an associated cover, the cover being movable relative to said manway nozzle to open and close an opening in said nozzle, said nozzle having an upper contact surface and said cover having a lower contact surface, the gasket
1. A gasket for sealing between the manway nozzle of a containment vessel and an associated cover, the cover being movable relative to said manway nozzle to open and close an opening in said nozzle, said nozzle having an upper contact surface and said cover having a lower contact surface, the gasket comprising: an annular ring member having a generally planar annular body portion defining an upper annular cover sealing surface and a lower annular nozzle body sealing surface, said upper annular cover sealing surface including at least one annular upstanding chevron extending therefrom and configured to engage the lower contact surface of the cover, and said lower annular nozzle body sealing surface including at least one annular lower chevron extending therefrom in a direction generally opposite said upstanding chevron and configured to engage the upper contact surface of the nozzle. 2. A gasket as claimed in claim 1 wherein said upper annular cover sealing surface and said lower annular nozzle body sealing surface each include two concentric radially spaced apart chevrons extending therefrom. 3. A gasket as claimed in claim 2 wherein said chevrons are of triangular cross-section. 4. A gasket as claimed in claim 3 wherein said chevrons are each formed by intersecting side walls having an included angle of approximately 80°. 5. A gasket as claimed in claim 1 wherein said gasket includes a radial outer leg portion depending from said generally planar annular body portion radially outward of said chevrons. 6. A gasket as claimed in claim 5 wherein said gasket includes a radial inner leg portion depending from said generally planar annular body portion radially inward of said chevrons. 7. A gasket as claimed in claim 5 wherein said gasket includes a visual indicator tab depending downwardly from said radial outer leg portion. 8. A gasket as claimed in claim 7 wherein said visual indicator tab includes a reflective media. 9. A gasket as claimed in claim 7 wherein said gasket includes at least a pair of visual indicator tabs, said visual indicator tabs being spaced apart around said annular ring member. 10. A gasket as claimed in claim 1 wherein said gasket including said annular ring member, said at least one annular upstanding chevron, and said at least one annular lower chevron is a one-piece integrally molded component. 11. A gasket for sealing between the manway nozzle of a containment vessel and an associated cover, the cover being movable relative to said manway nozzle to open and close an opening in said nozzle, said nozzle having an upper contact surface and said cover having a lower contact surface, the gasket comprising: an annular ring member having a generally planar annular body portion defining an upper annular cover sealing surface and a lower annular nozzle body sealing surface, said upper annular cover sealing surface including at least one annular upstanding projection extending therefrom and configured to engage the lower contact surface of the cover, and said lower annular nozzle body sealing surface including at least one annular lower projection extending therefrom in a direction generally opposite said upstanding projection and configured to engage the upper contact surface of the nozzlewherein each said at least one annular upstanding projection extending from said upper annular cover sealing surface and said at least one annular lower projection extending from said lower annular nozzle body sealing surface are of varying height circumferentially about said generally planar annular body portion relative to said upper annular cover sealing surface and said lower annular nozzle body sealing surface, respectively. 12. A gasket as claimed in claim 11 wherein said projections have locations of maximum height (hmax) at a plurality of circumferentially generally equally spaced locations about said generally planar annular body portion, and a plurality of locations of minimum height (hmin) generally midway between said locations of maximum height (hmax). 13. A gasket as claimed in claim 12 wherein said upper annular cover sealing surface and said lower annular nozzle body sealing surface each include two concentric radially spaced apart projections extending therefrom. 14. A gasket as claimed in claim 13 wherein the height of the projections relative to the surface from which they extend circumferentially about said gasket defines a generally sinusoidal pattern. 15. A railroad car having a tubular manway body defining an access opening, said body having an upper generally planar annular gasket contact surface, a cover pivotally mounted to said manway body to close said opening, defining a lower generally planar annular gasket contact surface, a resilient gasket interposed between said tubular manway body and said cover comprising an annular ring member having a generally planar annular body portion defining an upper annular cover sealing surface and a lower annular nozzle body sealing surface, said upper annular cover sealing surface including at least one annular upstanding chevron extending therefrom and engaging the lower generally planar annular gasket contact surface, and said lower annular nozzle body sealing surface including at least one annular lower chevron extending therefrom in a direction generally opposite said upstanding chevron and engaging the upper generally planar annular gasket contact surface. 16. A railroad car as claimed in claim 15 wherein said upper annular cover sealing surface and said lower annular nozzle body sealing surface each include two concentric radially spaced apart chevrons extending therefrom. 17. A railroad car as claimed in claim 16 wherein said chevrons are of triangular cross-section. 18. A railroad car as claimed in claim 17 wherein said chevrons are each formed by intersecting side walls having an included angle of approximately 80°. 19. A railroad car as claimed in claim 16 wherein said manway body defines an inner wall surface and an outer wall surface, said gasket includes a radial outer leg portion contacting said radial outer wall surface, said radial outer leg portion including at least one visual indicator tab portion depending from said radial outer leg portion. 20. A railroad car as claimed in claim 19 wherein said radial outer leg portion includes two visual indicator tabs depending therefrom located approximately one hundred eighty degrees (180°) apart. 21. A railroad car as claimed in claim 15 wherein said gasket including said annular ring member, said at least one annular upstanding chevron, and said at least one annular lower chevron is a one-piece integrally molded component. 22. A railroad car having a tubular manway body defining an access opening, said body having an upper generally planar annular gasket contact surface, a cover pivotally mounted to said manway body to close said opening, defining a lower generally planar annular gasket contact surface, a resilient gasket interposed between said tubular manway body and said cover comprising an annular ring member having a generally planar annular body portion defining an upper annular cover sealing surface and a lower annular nozzle body sealing surface, said upper annular cover sealing surface including at least one annular upstanding projection extending therefrom and engaging the lower generally planar annular gasket contact surface, and said lower annular nozzle body sealing surface including at least one annular lower projection extending therefrom in a direction generally opposite said upstanding projection and engaging the upper generally planar annular gasket contact surface wherein said manway body includes a plurality of securement brackets disposed about said opening, an eyebolt pivotally supported on each said securement bracket, each said eyebolt including a threaded end and a threaded nut thereon,said cover including a clamping plate having a plurality of slots aligned with said securement brackets sized to receive said eye bolts with said nuts positioned above said clamping plate,said gasket disposed between said upper generally planar annular gasket contact surface of said manway body and said lower generally planar annular gasket contact surface of said cover,said nuts positioned on said eyebolts to urge said cover toward said manway body to compress said projections on said annular nozzle body sealing surface against said planar upper annular upper gasket contact surface of said nozzle body and said projections on said lower annular nozzle body sealing surface against said planar annular gasket contact surface of said coverwherein each said at least one annular upstanding projection extending from said upper annular cover sealing surface and said at least one annular lower projection extending from said lower annular nozzle body sealing surface are of varying height circumferentially about said generally planar annular body portion relative to said upper annular cover sealing surface and said lower annular nozzle body sealing surface, respectively. 23. A railroad car as claimed in claim 22 wherein said projections have locations of maximum height (hmax) at a plurality of circumferentially spaced locations about said generally planar annular body portion, a plurality of locations of minimum height (hmin) midway between locations of maximum height and wherein said locations of minimum height (hmin) are radially aligned with said securement brackets. 24. A railroad car as claimed in claim 23 wherein the height of the projections relative to the surface from which they extend circumferentially about said gasket defines a generally sinusoidal pattern. 25. A railroad car as claimed in claim 23 wherein said manway body defines an inner wall surface and an outer wall surface, said gasket includes a radial outer leg portion contacting said radial outer wall surface, said radial outer leg portion including at least one tab portion depending from said radial outer leg portion. 26. A railroad car as claimed in claim 25 wherein said radial outer leg portion includes two visual indicator tabs depending therefrom located one hundred eighty degrees (180°) apart. 27. A railroad car as claimed in claim 26 wherein said visual indicator tabs are aligned with locations of maximum height (hmax) of said projections. 28. A gasket for sealing between the manway nozzle of a containment vessel and an associated cover, the cover being pivotally mounted to said manway nozzle to close an opening in said nozzle, said nozzle having an upper contact surface and said cover having a lower contact surface, comprising: an annular ring member having a generally planar annular body portion defining an upper annular cover sealing surface and a lower annular nozzle body sealing surface, said upper annular cover sealing surface including at least one annular upstanding chevron extending therefrom for engaging said lower contact surface of said cover, and said lower annular nozzle body sealing surface including at least one annular lower chevron extending therefrom in a direction generally opposite said upstanding chevron for engaging said upper contact surface of said manway nozzle, and said gasket including said annular ring member, said at least one annular upstanding chevron, and said at least one annular lower chevron being a one-piece integrally molded component.
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