[특허]Expandable band and locking mechanism

NPC, Inc.

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Expandable band and locking mechanism

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16L-021/00
미국특허분류(USC)	285/236; 285/230
출원번호	US-0210194 (2002-07-31)
발명자 / 주소	Brockway, Robert D.
출원인 / 주소	NPC, Inc.
대리인 / 주소	Bourque &
인용정보	피인용 횟수 : 11 인용 특허 : 36

초록
▼

The expandable band is used to secure a sealing element within a generally cylindrical structure, such as a pipe or manhole, or other round hole. The expandable band includes a band body having a first band end portion and a second band end portion. A plurality of slots are disposed in the first band end portion, and a locking member extends from the second band end portion. The locking member is an integral element of the second band end portion and includes a tab for extending through the second band end portion and into one of the plurality of slots to lock the expandable band at the desired diameter. The locking member may also include at least one rib or protrusion. When the band is expanded, the tab is disengaged from the slots and slides over the slots, allowing the first and second band end portions to move relative to one another. At the desired diameter, the tab engages one of the slots to lock the band at the desired diameter. In practice, the sealing member provides a resilient backing against the locking member thus securing the expandable band and providing the desired seal.

대표
청구항
▼

1. An expandable band comprising:a band body having a first band end portion and a second band end portion, wherein said first band end portion and said second band end portion overlap to form a generally annular shape; a plurality of sequential slots disposed in said first band end portion of said band body; a locking member disposed substantially entirely within said second band end portion of said band body such that said locking member is a unitary one-piece structure with said second band end portion and includes a tab for extending inwardly through an aperture in said second band end portion and into one of said plurality of slots to lock said expandable band at a desired diameter, wherein said band forms a generally annular outer surface having a generally continuous outer radius when said expandable band is locked at said desired diameter, an outer surface of said locking member being within said generally continuous outer radius of said band body; and wherein said second band end portion of said band body includes an end section extending beyond said tab of said locking member. 2. The expandable band of claim 1 wherein said band body has a generally U-shaped cross section.3. The expandable band of claim 2 wherein said first and second band end portions of said band body have said generally U-shaped cross section, and wherein said first band end portion of said band body has a narrower width than said second band end portion such that said first band end portion fits within said U-shaped cross section of said second band end portion.4. The expandable band of claim 1 wherein at least said second band end portion of said band body has a generally U-shaped cross section, and wherein said first band end portion of said band body has a narrower width than said second band end portion such that said first band end portion fits within said U-shaped cross section of said second band end portion.5. The expandable band of claim 1 wherein said band body includes a base portion and side portions extending from said base portion, and wherein said plurality of slots are disposed in said base portion of said band body.6. The expandable band of claim 1 wherein said first band end portion includes a separate piece attached to said band body and having said plurality of slots.7. The expandable band of claim 1 wherein said tab forms an obtuse angle with respect to a plane tangential to said second band end portion of said band body.8. The expandable band of claim 1 wherein said locking member includes a semi-rigid strip.9. The expandable band of claim 8 wherein said semi-rigid strip includes at least one rib.10. The expandable band of claim 8 wherein said semi-rigid strip includes at least one protrusion.11. The expandable band of claim 1 wherein said second band end portion includes a section having a U-shaped cross-section, and wherein said end section of said second band end portion extends as one piece from said section of said band body having said U-shaped cross-section.12. The expandable band of claim 1 wherein said end section of said second band end portion includes a separate extension member attached to said second band end portion of said band body.13. The expandable band of claim 1 further including an engaging element disposed on an inside surface of said band body, for engaging with a band expansion mechanism.14. The expandable band of claim 13 wherein said engaging element includes a block attached to said inside surface of said band body.15. The expandable band of claim 1 wherein said band body has a generally W-shaped cross section.16. The expandable band of claim 15 wherein said first and second band end portions of said band body have said generally W-shaped cross-section.17. The expandable band of claim 1 wherein said band body includes a base portion and at least two V shaped side portions extending from said base portion, and wherein said plurality of slots are disposed in said base portion of said band body.18. A sealing system comprising:a resilient sealing member; and an expandable band comprising: a band body having a first end and a second end, wherein said first end and said second end overlap to form a generally annular shape such that said expandable band contacts said resilient sealing member; a plurality of slots disposed in said band body proximate said first end; a locking member disposed substantially entirely within said second band end portion wherein said locking member is a unitary one-piece structure with said second band end portion and includes a tab for extending inwardly through said second band end portion and into one of said plurality of slots to lock said expandable band at a desired diameter against said resilient sealing member, wherein said resilient sealing member provides a resilient backing for said locking member, wherein said band forms a generally annular outer surface having a generally continuous outer radius when said expandable band is locked at said desired diameter, an outer surface of said locking member being within said generally continuous outer radius of said band body; and wherein said second band end portion of said band body includes an end section extending beyond said tab of said locking member. 19. The sealing system of claim 18 wherein said band body has a generally U-shaped cross section.20. The sealing system of claim 19 wherein said first and second band end portions of said band body have said generally U-shaped cross section, and wherein said first band end portion of said band body has a narrower width than said second band end portion such that said first band end portion fits within said U-shaped cross section of said second band end portion.21. The sealing system of claim 20 wherein said, end section of said second band end portion has a generally flat cross-section and extends as one piece from a section of said second band end portion having a generally U-shaped cross section.22. The sealing system of claim 18 wherein said locking member includes a semi-rigid strip.23. The expandable band of claim 22 wherein said semi-rigid strip includes at least one rib.24. The expandable band of claim 22 wherein said semi-rigid strip includes at least one protrusion.25. The expandable band of claim 18 wherein said band body has a generally W-shaped cross section.26. The expandable band of claim 18 wherein said first and second band end portions of said band body have said generally W-shaped cross-section.27. The expandable band of claim 18 wherein said band body includes a base portion and at least two V shaped side portions extending from said base portion, and wherein said plurality of slots are disposed in said base portion of said band body.28. An expandable band comprising:a band body having a first band end portion and a second band end portion, wherein said first band end portion and said second band end portion overlap to form a generally annular shape, and wherein said first and second band end portions of said band body have said generally W-shaped cross-section; a plurality of sequential slots disposed in said first band end portion of said band body; a locking member disposed in said second band end portion of said band body such that said locking member is an integral element of said second band end portion and includes a tab for extending through an aperture in said second band end portion and into one of said plurality of slots to lock said expandable band at a desire diameter, wherein said band body forms a generally annular outer surface having a generally continuous outer radius when said expandable band is locked at said desired diameter, an outer surface of said locking member being within said generally continuous outer radius of said band body; and wherein said second band end portion of said band body includes an end section extending beyond said tab of said locking member. 29. A sealing system comprising:a resilient sealing member; and an expandable band comprising: a band body having a first end and a second end, wherein said first end and said second end overlap to form a generally annular shape such that said expandable band contacts said resilient sealing member, and wherein said first and second band end portions of said band body have said generally W-shaped cross-section; a plurality of slots disposed in said band body proximate said first end; a locking member disposed in said second band end portion wherein said locking member is an integral element of said second band end portion and includes a tab for extending through said second band end portion and into one of said plurality of slots to lock said expandable band at a desired diameter against said resilient sealing member, wherein said resilient sealing member provides a resilient backing for said locking member, wherein said band body forms a generally annular outer surface having a generally continuous outer radius when said expandable band is locked at said desired diameter, an outer surface of said locking member being within said generally continuous outer radius of said band body; and wherein said second band end portion of said band body includes an end section extending beyond said tab of said locking member.

이 특허에 인용된 특허 (36)

이 특허를 인용한 특허 피인용횟수: 11

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Expandable band and locking mechanism

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Expandable band and locking mechanism

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이 특허에 인용된 특허 (36)

이 특허를 인용한 특허 피인용횟수: 11

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