Bolt recoil tang clamping system
View Patent ↗A self-adjusting clamping system top capture and hold a recoil lug extending outwardly from a bolt style receiver of a firearm. At least a lower portion of the receiver and the recoil lug are received into a chassis having a recess. The chassis is configured to receive an anvil block confronting the rear surface of the recoil lug. The chassis is configured to receive a tightening system confronting the front surface of the recoil lug. The anvil block has a front surface that contacts and confronts the rear surface of the recoil lug. The anvil block also has a rear surface that is outwardly rounded. The tightening system is at least partially wedge-shaped having a front surface that is angled and a rear surface that contacts and closely confronts the front surface of the recoil lug.
1. A firearm assembly comprising:
a bolt style receiver having a lower portion;
a recoil lug that protrudes outwardly and downwardly from the lower portion of the receiver; the recoil lug having a front surface and a rear surface;
an anvil block having a front surface and a rear surface, wherein the front surface of the anvil block is configured to confront the rear surface of the recoil lug and wherein the rear surface of the anvil block is outwardly rounded;
a tightening system having a front surface and a rear surface, wherein the front surface of the tightening system is angled and the rear surface of the tightening system is configured to confront the front surface of the recoil lug;
a chassis having a recess configured to receive at least the lower portion of the bolt style receiver and recoil lug, anvil block, and tightening system, wherein the recess includes a rounded depression that conforms to the rear surface of the anvil block and an angled surface spaced apart from the rounded depression to form a central region within the recess that is configured to closely contain the recoil lug, anvil block, and tightening system; and
a fastener for holding the tightening system relative to the chassis.
2. The firearm assembly of claim 1 wherein the tightening system further comprises a wedge block having a front angled surface and a rear surface, and a spacer block having a front surface and a rear surface wherein the front surface of the spacer block is configured to confront the rear surface of the wedge block and the rear surface of the spacer block is configured to confront the front surface of the recoil lug.
3. The firearm assembly of claim 2 wherein the wedge block further comprises a wedge shaped inner block and a wedge shaped outer form, wherein the wedge shaped outer form includes the front angled surface and the rear surface configured to confront the front surface of the spacer block and the wedged shaped inner block is configured to be received within the wedge shaped outer form.
4. The firearm assembly of claim 3 wherein the wedge shaped outer form includes a front sidewall and a rear sidewall with each front and rear sidewall including an upper portion that is wedge shaped and configured to receive the wedge shaped inner block.
5. The firearm assembly of claim 1 wherein the rounded rear surface of the anvil block is semi-cylindrical in shape.
6. The firearm assembly of claim 1 wherein the rounded rear surface of the anvil block is semi-spherical in shape.
7. The firearm assembly of claim 2 wherein the front and rear surfaces of the recoil lug are planar, the rear surface of the anvil block is planar, and the front and rear surfaces of the spacer block are planar.
8. A firearm assembly comprising:
a bolt style receiver having a lower portion with a recoil lug that protrudes outwardly and downwardly from the lower portion; the recoil lug having a front surface and a rear surface;
a chassis having a recess; and
self-adjusting means for capturing and holding the recoil lug within the recess of the chassis;
wherein the self-adjusting means for capturing includes an anvil block and a tightening system; the anvil block includes a front surface that is configured to contact and confront the rear surface of the recoil lug, and a rear surface that is outwardly rounded and configured to be received within a surface of the chassis; the tightening system includes a wedge shaped front surface that is configured to be received within a second surface of the chassis and a rear surface configured to contact and confront the front surface of the recoil lug.
9. The firearm assembly according to claim 8 wherein the anvil block rear surface is a semi-cylindrical surface.
10. The firearm assembly according to claim 8 wherein the anvil block rear surface is a semi-spherical surface.
11. The firearm assembly according to claim 8 wherein the tightening system comprises a wedge block and wherein the front surface is angled and the rear surface is planar.
12. The firearm assembly according to claim 8 wherein the tightening system comprises a wedge-shaped outer form with a wedge shaped inner form and a spacer bar where the spacer bar contacts and confronts the front surface of the recoil lug.
13. The firearm assembly according to claim 12 wherein the wedge shaped outer form includes one or more wedge shaped upper sidewalls.