US2015192383A1PendingUtilityA1

Firearm caliber conversion system

16
Assignee: U S FIREARMS ACADEMY LLCPriority: Jan 7, 2014Filed: Jan 7, 2014Published: Jul 9, 2015
Est. expiryJan 7, 2034(~7.4 yrs left)· nominal 20-yr term from priority
Inventors:Douglas Kenneth Shrode
F41C 3/00F41A 11/02F41A 9/71
16
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

A caliber conversion system has a frame, a slide connected to the frame and operable to reciprocate with respect to the frame, a recoil spring defining a central passage, the spring operably interposed between a selected portion of the slide in a selected portion of the frame, an elongated guide rod received in the central passage, and the guide rod having an elongated major intermediate portion having a first portion with a first diameter and a second portion with a different second diameter. The slide may define a forward portion defining an aperture receiving the guide rod, and the aperture may have a diameter between the first diameter of the rod and the second diameter of the rod. The slide may include a removable bushing defining the aperture. The bushing maybe threadedly received in a forward portion of the slide.

Claims

exact text as granted — not AI-modified
I claim: 
     
         1 . A pistol comprising:
 a frame;   a slide connected to the frame and operable to reciprocate with respect to the frame;   a recoil spring defining a central passage, the spring operably interposed between a selected portion of the slide and a selected portion of the frame;   an elongated guide rod received in the central passage; and   the guide rod having an elongated major intermediate portion having a first portion with a first diameter, and a second portion with a different second diameter.   
     
     
         2 . The pistol of  claim 1  wherein the slide defines a forward portion defining an aperture receiving the guide rod, and wherein the aperture has a diameter between the first diameter of the rod and second diameter of the rod. 
     
     
         3 . The pistol of  claim 2  wherein the slide includes a removable bushing defining the aperture. 
     
     
         4 . The pistol of  claim 3  wherein the bushing is threadedly received in a forward portion of the slide. 
     
     
         5 . The caliber conversion system of  claim 1  wherein the major intermediate portion of the guide rod further comprises a transitional portion with a varying diameter ranging between the first diameter and the second diameter that connects the first portion to the second portion. 
     
     
         6 . The caliber conversion system of  claim 5  wherein the transitional portion has a flat angled portion and a radiused portion. 
     
     
         7 . The caliber conversion system of  claim 6  wherein the flat portion is tangential to the radiused portion. 
     
     
         8 . The caliber conversion system of  claim 7  wherein the spring has a wire radius and a wire centerline, and wherein the spring contacts the flat portion at a tangency point that is 0.5 times the wire radius below the wire centerline. 
     
     
         9 . The caliber conversion system of  claim 8  wherein the wire radius is 0.0175 inch. 
     
     
         10 . The caliber conversion system of  claim 8  wherein the tangency point, a forwardmost portion of the radiused portion, and a rearward most portion of the flat portion are coincident. 
     
     
         11 . The caliber conversion system of  claim 6  wherein the recoil spring has a wire radius and wherein the radiused portion has a radius greater than 0.3 times the wire radius of the recoil spring and a radius less than 0.7 times the wire radius of the recoil spring. 
     
     
         12 . The caliber conversion system of  claim 11  wherein the wire radius is 0.0175 inch. 
     
     
         13 . The caliber conversion system of  claim 11  wherein the flat portion has an angle of 120° relative to the exterior surface of the front portion of the rod. 
     
     
         14 . The caliber conversion system of  claim 13  wherein the flat portion is 0.006 inch long and the radiused portion has a radius of 0.025. 
     
     
         15 . The caliber conversion system of  claim 3  wherein the spring is wound left-handed and the bushing is threaded right-handed. 
     
     
         16 . A caliber conversion system for a pistol having a frame, the system comprising:
 a slide adapted for connection to the frame and operable to reciprocate with respect to the frame;   a recoil spring defining a central passage, the spring operably interposed between a selected portion of the slide and a selected portion of the frame;   an elongated guide rod received in the central passage; and   the guide rod having an elongated major intermediate portion having a first portion with a first diameter, and a second portion with a different second diameter.   
     
     
         17 . The pistol of  claim 16  wherein the slide defines a forward portion defining an aperture receiving the guide rod, and wherein the aperture has a diameter between the first diameter of the rod and second diameter of the rod. 
     
     
         18 . The pistol of  claim 17  wherein the slide includes a removable bushing defining the aperture. 
     
     
         19 . The pistol of  claim 18  wherein the bushing is threadedly received in a forward portion of the slide. 
     
     
         20 . The caliber conversion system of  claim 16  wherein the major intermediate portion of the guide rod further comprises a transitional portion with a varying diameter ranging between the first diameter and the second diameter that connects the first portion to the second portion. 
     
     
         21 . The caliber conversion system of  claim 20  wherein the transitional portion has a flat angled portion and a radiused portion. 
     
     
         22 . The caliber conversion system of  claim 21  wherein the flat portion is tangential to the radiused portion. 
     
     
         23 . The caliber conversion system of  claim 22  wherein the spring has a wire radius and a wire centerline, and wherein the spring contacts the flat portion at a tangency point that is 0.5 times the wire radius below the wire centerline. 
     
     
         24 . The caliber conversion system of  claim 23  wherein the wire radius is 0.0175 inch. 
     
     
         25 . The caliber conversion system of  claim 23  wherein the tangency point, a forwardmost portion of the radiused portion, and a rearward most portion of the flat portion are coincident. 
     
     
         26 . The caliber conversion system of  claim 21  wherein the recoil spring has a wire radius and wherein the radiused portion has a radius greater than 0.3 times the wire radius of the recoil spring and a radius less than 0.7 times the wire radius of the recoil spring. 
     
     
         27 . The caliber conversion system of  claim 26  wherein the wire radius is 0.0175 inch. 
     
     
         28 . The caliber conversion system of  claim 26  wherein the flat portion has an angle of 120° relative to the exterior surface of the front portion of the rod. 
     
     
         29 . The caliber conversion system of  claim 28  wherein the flat portion is 0.006 inch long and the radiused portion has a radius of 0.025. 
     
     
         30 . The caliber conversion system of  claim 18  wherein the spring is wound left-handed and the bushing is threaded right-handed.

Join the waitlist — get patent alerts

Track US2015192383A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.