US 8,215,224 B1Granted

Variable recoil brake for munition

AssigneeThe United States of America as represented by the Secretary of the Army

InventorsRichard W. Tortorici, Jr., Ronald Gast, Edward Hyland, Richard W. Tortorici, III

Life of this patent

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Abstract

A recoil brake includes a control rod disposed in a central opening in a piston and cylinder assembly. A fluid passage leads from the piston to the control rod. A long stroke body is fixed to the piston and defines a long stroke orifice around the control rod. A short stroke body is removably disposed in the long stroke orifice. The short stroke body defines a short stroke orifice around the control rod, the short stroke orifice being smaller than the long stroke orifice. The recoil brake may be used with a 120 mm gun.

Claims11

Dependent claims

A recoil brake, comprising:

a cylinder;
a piston disposed in the cylinder for reciprocation therein;
a piston rod attached to the piston, the piston rod and piston having a central opening therethrough;
a single control rod which provides both long and short recoil braking, which control rod is disposed in the central opening in the piston rod and piston, the control rod having a diameter that varies along its length substantially in accordance with the following number pairs, wherein a first number in each pair is an axial location along the control rod and a second number in each pair is a diameter of the control rod at that axial location:
(0.00, 0.6250);
(0.50, 0.6250);
(1.00, 0.6250);
(1.50, 0.6250);
(2.00, 0.7641);
(2.50, 0.9093);
(2.75, 0.9150);
(3.00, 0.9195);
(3.50, 0.9250);
(4.00, 0.9270);
(4.50, 0.9285);
(5.00, 0.9310);
(5.50, 0.9335);
(6.00, 0.9365);
(6.50, 0.9395);
(7.00, 0.9425);
(7.50, 0.9460);
(8.00, 0.9500);
(8.50, 0.9540);
(9.00, 0.9575);
(10.00, 0.9660);
(11.00, 0.9750);
(12.00, 0.9850);
(13.00, 0.9975);
(14.00, 1.0150);
(15.00, 1.0300);
(15.50, 1.0350);
(16.00, 1.0420);
(16.50, 1.0475);
(17.00, 1.0530);
(17.50, 1.0560);
(18.00, 1.0610);
(18.50, 1.0670);
(19.00, 1.0750);
(19.50, 1.0830);
(20.00, 1.0926);
(20.50, 1.0999);
(21.00, 1.1073);
(21.50, 1.1170);
(22.00, 1.1300);
an end cap rotatably disposed in one end of the cylinder, one end of the control rod being fixed to the end cap and the other end of the control rod being free;
at least one fluid passage from the piston to the control rod;
a long stroke body fixed to the piston, the long stroke body defining a long stroke orifice around the control rod, a diameter of the long stroke orifice being about 1.14 inches;
and
a short stroke body removably disposed in the long stroke orifice, the short stroke body defining a short stroke orifice around the control rod, a diameter of the short stroke orifice being about 1.05 inches;
wherein fluid flow through the at least one fluid passage may be selectively directed through one of the long stroke orifice and the short stroke orifice by rotation of the end cap.

47 more elements

Dependencies are inferred from the claim text.

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Abstract

A recoil brake, comprising:

a cylinder;
a piston disposed in the cylinder for reciprocation therein;
a piston rod attached to the piston, the piston rod and piston having a central opening therethrough;
a single control rod which provides both long and short recoil braking, which control rod is disposed in the central opening in the piston rod and piston, the control rod having a diameter that varies along its length substantially in accordance with the following number pairs, wherein a first number in each pair is an axial location along the control rod and a second number in each pair is a diameter of the control rod at that axial location:
(0.00, 0.6250);
(0.50, 0.6250);
(1.00, 0.6250);
(1.50, 0.6250);
(2.00, 0.7641);
(2.50, 0.9093);
(2.75, 0.9150);
(3.00, 0.9195);
(3.50, 0.9250);
(4.00, 0.9270);
(4.50, 0.9285);
(5.00, 0.9310);
(5.50, 0.9335);
(6.00, 0.9365);
(6.50, 0.9395);
(7.00, 0.9425);
(7.50, 0.9460);
(8.00, 0.9500);
(8.50, 0.9540);
(9.00, 0.9575);
(10.00, 0.9660);
(11.00, 0.9750);
(12.00, 0.9850);
(13.00, 0.9975);
(14.00, 1.0150);
(15.00, 1.0300);
(15.50, 1.0350);
(16.00, 1.0420);
(16.50, 1.0475);
(17.00, 1.0530);
(17.50, 1.0560);
(18.00, 1.0610);
(18.50, 1.0670);
(19.00, 1.0750);
(19.50, 1.0830);
(20.00, 1.0926);
(20.50, 1.0999);
(21.00, 1.1073);
(21.50, 1.1170);
(22.00, 1.1300);
an end cap rotatably disposed in one end of the cylinder, one end of the control rod being fixed to the end cap and the other end of the control rod being free;
at least one fluid passage from the piston to the control rod;
a long stroke body fixed to the piston, the long stroke body defining a long stroke orifice around the control rod, a diameter of the long stroke orifice being about 1.14 inches;
and
a short stroke body removably disposed in the long stroke orifice, the short stroke body defining a short stroke orifice around the control rod, a diameter of the short stroke orifice being about 1.05 inches;
wherein fluid flow through the at least one fluid passage may be selectively directed through one of the long stroke orifice and the short stroke orifice by rotation of the end cap.

47 more elements