发明授权
US4433736A Device for avoiding secondary impacts resulting from the bounces of a
mass against a target-member
失效
用于避免由于质量与目标成员反弹而产生的次要影响的装置
- 专利标题： Device for avoiding secondary impacts resulting from the bounces of a mass against a target-member
- 专利标题（中）： 用于避免由于质量与目标成员反弹而产生的次要影响的装置
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申请号： US377113申请日： 1982-05-11
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公开(公告)号： US4433736A公开(公告)日： 1984-02-28
- 发明人: Pierre-Claude Layotte , Laurent Bozec
- 申请人： Pierre-Claude Layotte , Laurent Bozec
- 申请人地址： FRX Rueil-Malmaison FRX Massy
- 专利权人： Institut Francais du Petrole,Compagnie Generale de Geophysique
- 当前专利权人： Institut Francais du Petrole,Compagnie Generale de Geophysique
- 当前专利权人地址： FRX Rueil-Malmaison FRX Massy
- 优先权： FRX8109474 19810511
- 主分类号： G01V1/143
- IPC分类号： G01V1/143 ; G01V1/02 ; G01V1/053 ; G01V1/147 ; G01V1/157 ; B23B45/16
摘要：
A device for preventing secondary impacts of a mass against a target member, as used in particular for generating shear waves in the earth, is provided. The mass is secured at the end of a pivotable rigid arm actuated by driving device, and the driving device adapted to block the fall of the rigid arms, comprises a cam co-operating with a pawl when it registers therewith and with a flat part of the cam with the registering conditions occurring only after the first impact of the mass and its bounce against the target member.
公开/授权文献
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