Low energy screws for wood and similar materials

摘要

A low energy wood screw that may be inserted quickly and using less energy than conventional screws. In various embodiments, the screw may include a countersunk head having a recess for accommodating a driving tool, a tapered neck, a plurality of crown ribs extending over the head and neck, a lubricating coating, main threads with a large thread lead, and lower threads having an asymmetrical profile and extending onto a gimlet point.

主权项

1. A low energy wood screw comprising:
a countersunk head having a recess for accommodating a driving tool; a shank extending from the head to a point tip, the shank having a tapered neck, main threads, lower threads, and a point; a plurality of crown ribs extending outwardly from said head and neck; wherein the main threads have a lead that is from about 60 percent to about 80 percent of the outer diameter; wherein the main threads are arranged between the neck and the lower threads, and wherein the main threads have a thread form including an outer tip having a substantially linear profile and a rounded root having a concave profile; and wherein the lower threads are arranged between the main threads and the point tip, and wherein the lower threads have an asymmetrical thread form profile.