Infastech Intellectual Properties Pte. Ltd.

Sean Riskin

Richard W Lukes

Donald K Blaess

A fastener system includes a fastener and a driver, each of which have three alternating lobes and troughs that define the drive surfaces. Each alternating lobes and troughs is defined by an outer radius portion, a drive side transition, an inner transition radius, and a reverse drive portion. The fastener recess and the driver each also have a side wall defined by the outer transition radius that tapers at a taper angle relative to a rotational axis. The fastener side wall may taper at about 60&#xb0;. The driver side wall may taper at about 60&#xb0;. Alternatively, the driver side wall may taper at an angle at least 10&#xb0; less than the taper angle of the recess side wall, such as 42&#xb0;. The drive side transition defines a drive angle, which may be between 0&#xb0; and 5&#xb0;.

Tapered lobular driver and fastener

A fastener system includes a fastener and a driver, each of which have three alternating lobes and troughs that define the drive surfaces. The three alternating lobes and troughs are each defined by an outer radius portion, a drive side transition, an inner transition radius, and a reverse drive portion. The fastener recess and the driver each also have a side wall defined by the outer transition radius that tapers at a taper angle relative to the rotational axis. The fastener side wall may taper at about 60&#xb0;. The driver side wall may taper at about 60&#xb0;. Alternatively, the driver side wall may taper at an angle at least 10&#xb0; less than the taper angle of the recess side wall, such as 42&#xb0;. The drive side transition defines a drive angle which may be between 0&#xb0; and 5&#xb0;.

Growing community of inventors

Pleasanton, CA, United States of America

Sean Riskin