[특허]Ground retainer

Ground retainer 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16B-039/24 H01R-004/26
출원번호	US-0518252 (1995-08-23)
발명자 / 주소	Homfeldt Kent (Elgin IL) Leatherman Barth (St. Charles IL) Langford James (Port Washington WI)
출원인 / 주소	Illinois Tool Works Inc. (Glenview IL 02)
인용정보	피인용 횟수 : 48 인용 특허 : 0

초록 ▼

A snap-on ground retainer for a fastener of the type having a shank, the shank having a head at one end and a threaded portion along its length. The ground retainer comprises a relatively thin sheet metal and includes a washer-like member having an external annular body portion and an inner tooth portion, the inner tooth portion comprises a plurality of circumferentially spaced teeth extending radially inwardly from an inner margin of the washer-like member. The plurality of circumferentially spaced teeth comprise a plurality of resilient retaining teeth and a plurality of rigid grounding teeth, an inner diameter defined by the rigid grounding teeth is slightly larger than a maximum diameter of the threaded portion on the fastener and an inner diameter defined by the resilient retaining teeth is slightly smaller than a maximum diameter of the threaded portion on the fastener with which the ground retainer is adapted to be telescopically associated. The resilient retaining teeth are deflectable for permitting passage of the ground retainer over the threaded portion onto the fastener to seat on t

대표청구항 ▼

A snap-on ground retainer, for use with a fastener comprising a shank having a head at one end and a threaded portion extending along the length of the shank, comprising: a relatively thin sheet metal, washer-like member having a radially outer annular body portion disposed within a plane, and a radially inner tooth portion comprising a plurality of circumferentially spaced teeth extending radially inwardly from a radially inner margin of said radially outer annular body portion; said plurality of circumferentially spaced teeth comprising a first set of flat, resiliently flexible retaining teeth, and a second set of grounding teeth; said first set of flat, resiliently flexible retaining teeth having a first predetermined length defining a first locus, defined by radially innermost portions of said first set of flat, resiliently flexible retaining teeth, having a first diametrical value such that said first set of flat, resiliently flexible retaining teeth are adapted to be engageable with, and deflectable in a first direction by, a threaded portion of a shank of a fastener, when said ground retainer is telescopically associated with a threaded portion of a shank of a fastener, for permitting passage of said ground retainer over a threaded portion of a shank of a fastener in a second relative direction, and yet said first set of flat, resiliently flexible retaining teeth are rigid enough for preventing said ground retainer from being easily detached from a threaded portion of a shank of a fastener by relative movement of said ground retainer with respect to a threaded portion of a shank of a fastener in said first direction after said ground retainer is telescopically associated with a threaded portion of a shank of a fastener; and said second set of grounding teeth having a second predetermined length, which is slightly smaller than said first predetermined length of said first set of flat, resiliently flexible retaining teeth, defining a second locus, defined by radially innermost portions of said second set of grounding teeth having a second diametrical value which is slightly larger than said first diametrical value of said first locus as defined by said radially innermost portions of said first set of flat, resiliently flexible retaining teeth such that said grounding teeth are not adapted to be engageable with a threaded portion of a shank of a fastener when said ground retainer is telescopically associated with a threaded portion of a shank of a fastener, said grounding teeth being axially deflected out of said plane of said annular body portion for enabling said grounding teeth to engage an adjacent upper surface member and an adjacent lower surface member, when a fastener is telescopically associated with said ground retainer and is tightly secured to a lower surface member, and thereby create and maintain an electrical connection between an upper surface member and a lower surface member.

이 특허를 인용한 특허 (48)

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