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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9803676 B1

PDFFull Text
Date of Patent:
Oct. 31, 2017

Filed:

Mar. 24, 2016

Hollow metal screw and method of making

Applicant:

Physical Systems, Inc., Carson City, NV (US);

Inventor:

Charles G. Hutter, III, Carson City, NV (US);

Assignee:

Physical Systems, Inc., Carson City, NV (US);

Attorneys:

Lowry Blixseth LLP

Scott M. Lowry

Primary Examiner:

Edward Tolan

Int. Cl.
CPC ...
B21K 1/56 (2006.01); F16B 23/00 (2006.01); C21D 9/00 (2006.01); C21D 6/02 (2006.01); C21D 1/26 (2006.01); C22C 38/58 (2006.01); C22C 38/54 (2006.01); C22C 38/50 (2006.01); C22C 38/46 (2006.01); C22C 38/42 (2006.01); C22C 38/06 (2006.01); C22C 38/02 (2006.01); B21D 53/24 (2006.01); F16B 33/00 (2006.01); F16B 35/04 (2006.01); F16B 37/02 (2006.01); B21H 3/04 (2006.01); F16B 35/00 (2006.01); F16B 37/00 (2006.01); B21H 3/02 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C21D 8/10 (2006.01);
U.S. Cl.
CPC ...
F16B 23/00 (2013.01); B21D 53/24 (2013.01); B21H 3/02 (2013.01); B21H 3/04 (2013.01); B21K 1/56 (2013.01); C21D 1/26 (2013.01); C21D 6/02 (2013.01); C21D 9/0093 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/46 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01); C22C 38/58 (2013.01); F16B 23/0046 (2013.01); F16B 33/008 (2013.01); F16B 35/00 (2013.01); F16B 35/04 (2013.01); F16B 35/041 (2013.01); F16B 37/00 (2013.01); F16B 37/02 (2013.01); C21D 8/105 (2013.01); C21D 2261/00 (2013.01); F16B 23/0053 (2013.01); F16B 23/0061 (2013.01); F16B 23/0092 (2013.01);
Abstract

A hollow screw and related process of making is provided, wherein the hollow screw is formed from a generally circular corrosion resistant stainless steel disk cut from flat roll stock. The hollow screw includes a head and an elongated and hollow shaft having a wall thickness between about 0.2 to about 0.7 millimeters extending therefrom and defining a shank portion and a threaded portion having a plurality of threads thereon with a rotational drive mechanism configured to facilitate tightening via the threads. The process involves annealing to soften the stamped hollow screw, followed by thread rolling, and then age hardening the hollow screw. As such, the resultant hollow screw is relatively lightweight, about 50% the mass of a solid core screw made from the same material, with a sufficient thread strength to meet most aerospace applications and contributes to important aircraft fuel economy.

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