公开(公告)号：US10550540B2

公开(公告)日：2020-02-04

申请号：US15759520

申请日：2016-09-13

申请人： DSG S.r.l.

发明人： Davide De Siena

IPC分类号： E02D29/14 ,  E05B65/00 ,  E05B13/00 ,  E05C9/10 ,  E05B17/18 ,  E05B35/00 ,  E05C9/00 ,  E05B17/00

摘要： A manhole includes a device for safely closing and locking the manhole, which has a cylinder with centering pins that is attached to a slab and is rotatable with an operating key acting on the pins, and further includes an anti-burglary block, which in locked position is positioned inside the cylinder and hides and protects an anti-theft bolt positioned inside a hole, which crosses the entire anti-burglary block and has a larger diameter at the front and the same diameter as the anti-theft bolt in the back, so as to receive the anti-theft bolt in a threaded spot in the inner wall of the cylinder and enable placement of the anti-theft bolt in the body of the anti-burglary block when totally tightened into the threaded spot, wherein the end of the anti-theft bolt, in closed position, is housed in a locking hole on a circular support of the cover.

公开(公告)号：US20220025737A1

公开(公告)日：2022-01-27

申请号：US17312040

申请日：2019-12-10

申请人： DSG S.r.l.

发明人： Antonio Ghiglia

IPC分类号： E21B41/00 ,  E21B33/02

摘要： A closing device for wells or the like includes a frame that is intended to be stationary in the mounted condition of the device and that delimits a through-slot; a removable closing cover, which cooperates with the frame and which can alternately be arranged in a closing or opening position of the slot, without coinciding therewith, the closing cover being provided with a locking mechanism to the frame in the closing position, the locking mechanism having a bolt that cooperates with an engagement seat integral with the frame, the locking mechanism being provided in combination with a drive tool of the locking mechanism; and enabling and disabling members of the drive tool that drive the locking mechanism or that couple the drive tool and the locking mechanism.