Resources Contact Us Home
Screw for contaminated pre-tapped holes

Image Number 3 for United States Patent #4973209.

A locking screw having a head at one end, a special entry portion at the other end, and a trilobular shank portion extending from the entry portion toward the head. The screw is further characterized in that the thread profile is of a double angle configuration symmetrical about an axis perpendicular to the longitudinal axis of the screw. The entry section is tapered and is formed with a series of truncations which serve to clear progressively a contaminating coating in an internally threaded workpiece, such as a nut, when the screw is threaded therein.

  Recently Added Patents
Precision geolocation of moving or fixed transmitters using multiple observers
Storage device having clock adjustment circuitry with firmware-based predictive correction
Optical splitter device
Image erasing apparatus and recording medium conveying method for image erasing apparatus
Systems and methods for arranging and labeling cardiac episodes
Compound semiconductor epitaxial structure and method for fabricating the same
  Randomly Featured Patents
Damped mechanical joint assembly
Printing apparatus, method, and program comprising a plurality of printer units using synchronized, divided print data
Device for judging types of liquid in container and control method therefor
Structure and method for planar lateral oxidation in passive devices
Composite liquid cells
Magnetic tape cassette, window member and resin molding product
Refractory hearth furnace floor arrangement for retaining an alloy chain and pusher assembly
Imaging apparatus
Compact belt fuser apparatus with floating idler roller supported by belt and biased tension roller
Display apparatus