公开(公告)号：EP0369655A2

公开(公告)日：1990-05-23

申请号：EP89311411.6

申请日：1989-11-03

申请人： Black & Decker Inc.

发明人： Chaconas, Peter Constantine

IPC分类号： B25B15/00

CPC分类号： B25B15/005

摘要： A modified Phillips-type screwdriver bit is disclosed that is fully compatible with a standard Phillips-head fastener, and is designed to significantly increase the level of torque that can be applied to the fastener while at the same time substantially reducing the cam-out forces normally produced by a standard Phillips screwdriver bit. These results are accomplished by forming generated surfaces along the side walls of the bit wings so that the included angle defined by the converging side walls of adjoining bit wings gradually increases from the Phillips standard 92 degrees at the base of the bit wings to approximately 105 degrees at the wing tips. This configuration serves to confine the application of torque to the side surfaces of the bit wings initially along contact lines adjacent and parallel to the roots of the bit wings with the contact area gradually progressing radially outwardly as torque levels increase and the opposing side surfaces of the recess wings in the head of the fastener begin to deform.

摘要翻译： 公开了一种与标准十字头头紧固件完全兼容的改进的十字螺丝刀头，并且被设计成显着地增加可施加到紧固件的扭矩水平，同时大大减少了凸出力 通常由标准十字螺丝刀钻头生产。 这些结果通过沿钻头翼的侧壁形成所产生的表面来实现，使得由相邻钻头翼的会聚侧壁限定的夹角从钻头翼底部的菲利普斯标准92度逐渐增加到大约105度 在翼尖。 该构造用于将扭矩的应用限制在钻头翼的侧表面上，最初沿与钻头翼的根部相邻并平行的接触线，随着扭矩水平的增加，接触面积逐渐向外径向向外延伸， 紧固件头部的凹陷部分开始变形。

公开(公告)号：EP0369655A3

公开(公告)日：1990-07-11

申请号：EP89311411.6

申请日：1989-11-03

申请人： Black & Decker Inc.

发明人： Chaconas, Peter Constantine

IPC分类号： B25B15/00

CPC分类号： B25B15/005

摘要： A modified Phillips-type screwdriver bit is disclosed that is fully compatible with a standard Phillips-head fastener, and is designed to significantly increase the level of torque that can be applied to the fastener while at the same time substantially reducing the cam-out forces normally produced by a standard Phillips screwdriver bit. These results are accomplished by forming generated surfaces along the side walls of the bit wings so that the included angle defined by the converging side walls of adjoining bit wings gradually increases from the Phillips standard 92 degrees at the base of the bit wings to approximately 105 degrees at the wing tips. This configuration serves to confine the application of torque to the side surfaces of the bit wings initially along contact lines adjacent and parallel to the roots of the bit wings with the contact area gradually progressing radially outwardly as torque levels increase and the opposing side surfaces of the recess wings in the head of the fastener begin to deform.

公开(公告)号：EP0551930A3

公开(公告)日：1993-08-18

申请号：EP93104130.5

申请日：1989-11-03

申请人： Black & Decker Inc.

发明人： Chaconas, Peter Constantine

IPC分类号： B25B15/00

CPC分类号： B25B15/005

摘要： A modified Phillips-type screwdriver bit is disclosed that is fully compatible with a standard Phillips-head fastener, and is designed to significantly increase the level of torque that can be applied to the fastener while at the same time substantially reducing the cam-out forces normally produced by a standard Phillips screwdriver-bit. These results are accomplished by the use of a driver having a cross-shaped recess formed in the head thereof, and having associated therewith an axis and including a bit portion symmetrical about any plane containing the axis of the driver and adapted for insertion into said recess which comprises radially symmetrical wing means having generated side surfaces and defining roots therebetween for rotationally driving said fastener on said side surfaces in the same manner in both rotational directions. Preferably said wing means comprise four equally radially spaced bit wings defined by generated side surfaces that in turn define an included angle between adjoining bit wings that progressively increases from a first predetermined angle at the base of said bit wings to a second greater predetermined angle at an axially spaced distance therefrom. The radially outwardly facing surfaces of said bit wings may be tapered toward a common point at an angle relative to the axis of said bit portion substantially equal to the Phillips-standard wing angle. The roots of said bit portion are preferably oriented relative to said bit axis at an angle substantially equal to the Phillips-standard root angle.

公开(公告)号：EP0551930A2

公开(公告)日：1993-07-21

申请号：EP93104130.5

申请日：1989-11-03

申请人： Black & Decker Inc.

发明人： Chaconas, Peter Constantine

IPC分类号： B25B15/00

CPC分类号： B25B15/005

摘要： A modified Phillips-type screwdriver bit is disclosed that is fully compatible with a standard Phillips-head fastener, and is designed to significantly increase the level of torque that can be applied to the fastener while at the same time substantially reducing the cam-out forces normally produced by a standard Phillips screwdriver-bit. These results are accomplished by the use of a driver having a cross-shaped recess formed in the head thereof, and having associated therewith an axis and including a bit portion symmetrical about any plane containing the axis of the driver and adapted for insertion into said recess which comprises radially symmetrical wing means having generated side surfaces and defining roots therebetween for rotationally driving said fastener on said side surfaces in the same manner in both rotational directions. Preferably said wing means comprise four equally radially spaced bit wings defined by generated side surfaces that in turn define an included angle between adjoining bit wings that progressively increases from a first predetermined angle at the base of said bit wings to a second greater predetermined angle at an axially spaced distance therefrom. The radially outwardly facing surfaces of said bit wings may be tapered toward a common point at an angle relative to the axis of said bit portion substantially equal to the Phillips-standard wing angle. The roots of said bit portion are preferably oriented relative to said bit axis at an angle substantially equal to the Phillips-standard root angle.