英语翻译Claim:What is claimed is:1.A locking device to screw and

英语翻译
Claim:What is claimed is:
1.A locking device to screw and to unscrew elements having threaded couplings and belonging to a drill stem,said device being suitable for use in drill rigs comprising arotating head suitable to make said drill stem rotate about a substantially vertical axis and slide along said axis,
wherein the device comprises a lower concave housing suitable to receive and to hold the upper end of an element to be screwed or unscrewed into the drill stem in the drill hole,
wherein said concave housing forms an envelope of surfaces divergent in a downward and outward direction in order to allow a plurality of blocks to slide along said envelope of surfaces,wherein each of said blocks has an outside sliding surface,parallel and cooperating with said envelope of surfaces,and an inside surface suitable to engage the element to be held; the blocks are mounted in order to slide along said envelope of surfaces,
wherein said inner surface,having a cylindric shape that is congruent with the lateral cylindric surface of the upper end of the element of the drill stem,cooperates with the horizontal surface of a flange suitable to be pushed against an upperedge of said element,and
wherein said blocks are moveable between a first free configuration,with the locking device in its lifted position,in which the blocks are pushed by elastic means towards a lower,outside portion of said envelope of surfaces,and
a second locking configuration,with the locking device positioned on the element to be held,wherein the blocks are radially clamped against the upper end of said element.
2.The device of claim 1,wherein said envelope of surfaces forms a conical surface.
3.The device of claim 2,wherein said outer surface,whereon the blocks slide,has the same shape of said conical surface.
4.The device of claim 1,wherein the device is mounted,in a non rotating manner,to the rotating head.
5.The device of claim 1,wherein the blocks are provided with a radial groove sliding over said flange.
6.The device of claim 1,wherein the flange is provided with a frontal seal acting over said head.
7.The device of claim 1,wherein each one of said blocks is coupled with a corresponding elastic means comprising a piston,received in a sliding manner in a corresponding cavity obtained in the device.
8.The device of claim 7,wherein the lower portion of each piston is fixed to the corresponding block through a threaded coupling.
9.The device of claim 1,wherein each one of said outer surfaces of the blocks forms a guide parallel to said envelope of surfaces,a corresponding lock,integral with the device,slides along said guide.
10.The device of claim 9,wherein said locks are bottom locking elements present on said sliding blocks

索赔:所宣传是:

1.锁定装置元素来旋转螺纹螺丝,有螺纹联轴器、属于钻杆装置在说,适用于钻机包括arotating头适合使说钻杆关于实质性的垂直轴旋转滑动轴上,说,

其中设备包括一个较低的凹住房适合接受并保留一个元素的上端不能组装或们在进入钻杆钻孔,

所述凹住房形成一个信封的路面上发散在向下和外在的方向的一组以便能够说滑动块的路面上,在信封上说的每一个有个渺小的滑动面块,平行,配合说信封的路面上,和一个合适的内表面与元素,举行块为滑动安装在信封上说的路面上,

所述的内表面,有一个圆筒形形状,合乎侧圆筒形的上端表面的因素、合作钻杆水平面的法兰可推一个upperedge元素,以及的说

所述块之间的变迁的第一个自由配置,锁定装置的地位,将推动下块弹性迈向一个较低的,外面的部分信封的路面上,说

第二个锁定配置,锁定装置的位置在元素被占据,夹紧在径向块对上完说元素.

2.如权利要求1所述的设备,其中所述的信封的路面上形成了一个圆锥形的表面.

3.如请求项2的设备,其中所述外表面块,还滑,有同样的形状的说了锥形的表面.

4.如权利要求1所述的设备,其中所述机构安装,在一个不旋转的态度,旋转的头.

5.如权利要求1所述的设备,其中所述街区