[특허]Method and installation apparatus for rock bolting

[미국특허] Method and installation apparatus for rock bolting 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E21D-020/00
출원번호	US-0299642 (1981-09-04)
우선권정보	SE-0006252 (1980-09-08)
발명자 / 주소	Skogberg Bo T. (Handen SEX)
출원인 / 주소	Atlas Copco Aktiebolag (Nacka SEX 03)
인용정보	피인용 횟수 : 116 인용 특허 : 3

초록 ▼

A rock bolt is manufactured from a steel tube which has been deformed to have a deep depression so that it assumes a substantially reduced diameter. A sleeve is pressed onto the outer end thereof which is sealed through welding. An installation chuck carried on an installation rod comprises a socket for receiving the outer sleeve and when the rock bolt has been manually inserted in a borehole, for example by means of the chuck, high pressure liquid is conveyed through passages in the chuck to a hole which leads through the sleeve to an interior chamber of the tube so that the tube expands through plastic deformation, thereby anchoring the rock bolt in the borehole. The chuck is then relieved of pressure and removed from the anchored rock bolt.

대표청구항 ▼

Method of rock bolting by using a fluid expansible tube-formed rock bolt (10) having an internal elongated pressure fluid receiving chamber that is closed at both of its ends but has a fluid inlet (18) at one end thereof which is in fluid communication with the interior of said chamber, said rock bolt (10) being provided with a cylindrical sleeve (13) on said one end and a supply hole through said sleeve to the interior of said chamber of said rock bolt to provide said fluid inlet (18), said chamber being pressurized to expand the tube formed rock bolt in a borehole, characterized by the steps of: inserting said one end of said rock bolt (10) in a bolt socket (28) of a holder (21) so that a fluid conduit (40, 45, 47) of said holder is in fluid communication with said fluid inlet (18) of said rock bolt; moving said holder (21) to insert said rock bolt (10) into a borehole; supplying high pressure liquid through said fluid conduit (40, 45, 47) of said holder (21) and through said fluid inlet (18) to said chamber of said rock bolt to plastically deform said rock bolt (10) so as to be expanded and anchored in the borehole; sealing off said socket (28) of said holder (21) against said sleeve (13) axially on both sides of said fluid inlet (18) at least during supplying said high pressure liquid to said fluid inlet (18) through said conduit (40, 45); relieving said conduit (40, 45, 47) of fluid pressure and thereby relieving said chamber of said rock bolt (10) of fluid pressure; and removing said holder (21) from said rock bolt, said rock bolt remaining anchored in the borehole.

이 특허에 인용된 특허 (3) 인용/피인용 타임라인 분석

Brown ; Philip S. ; Harman ; Douglas G., Apparatus for hydraulically expanding a tube.
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Lindeboom Herman (Ringoes NJ), Friction rock stabilizer and method of installing same in an earth structure.
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Knox Lloyd C. (Duncan OK), System for inflating packers and placing grout through one line.
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A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Method and installation apparatus for rock bolting 원문보기

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[미국특허] Method and installation apparatus for rock bolting 원문보기

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이 특허에 인용된 특허 (3) 인용/피인용 타임라인 분석

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