专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

61. 发明专利

GB2211870A Yieldable stilt for a mine road arch 未知
公开(公告)号：GB2211870A
公开(公告)日：1989-07-12
申请号：GB8725821
申请日：1987-11-04
申请人： WARD ENGINEERING LIMITED
发明人： WARD TERENCE
IPC分类号： E21D11/22 , E21D11/30 , E21D15/22
摘要： A yieldable stilt for receiving a lower end 13 of a mine roadway arch 14 has a pair of members 11 upstanding from a base 12 and mounting deformable elongate elements 15. A frame 19 embraces the members 11, engages the elements 15, and bears the end 13 of the arch 14, travelling downwards and compressing the elements under load from the arch.

66. 发明专利

IT1118646B 未知
公开(公告)号：IT1118646B
公开(公告)日：1986-03-03
申请号：IT6806479
申请日：1979-05-18
申请人： DAVUM
IPC分类号： E21D11/22 , E21D15/22 , E21D
摘要： A device for limiting stresses exerted by neighbouring ground on a buried structure which comprises at least two neighbouring elements which form at least one part of the wall of the structure. The stress limiting device comprises at least one longitudinal slidable plate adapted to be connected by one of its edge portions to one of the neighbouring structure elements, at least two longitudinal guide elements adapted to be connected to the other structure element and applied respectively by one of their faces against at least the opposed edge portion of the slidable plate. A plurality of fixing means extend through apertures in the slidable plate and in the guide elements for clamping the opposed edge portion of the slidable plate between said guide elements. At least one of the guide elements constitutes a fishplate. At least the apertures in the opposed edge portion of the slidable plate are disposed in a plurality of spaced-apart longitudinal rows so that the zones located between the apertures of the same row of two adjacent rows form zones of deformation and/or fracture capable of yielding under the fixing means by a sliding of the slidable plate between the guide elements under the effect of forces which may be exerted on the device by the structure elements.

67. 发明专利

CA1197387A YIELDABLE CONNECTION 未知
公开(公告)号：CA1197387A
公开(公告)日：1985-12-03
申请号：CA442251
申请日：1983-11-30
申请人： POWONDRA DIPL ING FRANZ
发明人： POWONDRA FRANZ
IPC分类号： E21D15/22 , E21D21/00 , F16B31/02 , F16F7/12 , E21D20/00
摘要： TITLE: "YIELDABLE CONNECTION" The invention provides a yieldable connection between a metallic rod-shaped body and a holding means through which it passes and is intended particularly for yieldable rock bolts (roof bolts) anchor bolts and yieldable props, e.g. for mining and tunnelling. For that purpose shear bodies, e.g. spheres or inclined cylindrical pins are provided between the holding means and the slidable rod-shaped body and project some distance into the cross-section of the rod-shaped body. On sliding of the latter, in the holding means, these shear bodies form grooves in the rod, whereby energy is absorbed. Inventor: FRANZ POWONDRA

你已经成功收藏专利！

检索式保存成功!

IPRDB