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US 10,502,511 B2Granted
3-cycle 2-stroke damper
OwnerThomas Allen Gravesinventor
Life of this patent
Estimating the term…
Abstract
A trigger activated arm may use a piston moving within a cylinder to dampen gun bolt speed. In some embodiments, gun bolt motion increases pressure within the cylinder bore to dampen rearward gun bolt speed. The pressure may be high enough to unseat the cylinder creating a vent that cylinder fluid exits. In other embodiments, gun bolt motion decreases pressure within the cylinder bore to dampen forward gun bolt speed.
Claims10
An arm comprising:
- a frame;
- a trigger that is depressible to fire the arm once per operating cycle;
- a gun bolt that is movable rearward and forward with respect to the frame;
- a surface supported to the frame;
- a piston supported to one of the gun bolt and the surface;
- a cylinder that:
- 1) defines a cylinder bore;
- 2) has cylinder fluid within the cylinder bore;
- and, 3) is supported to the other of the gun bolt and the surface;
- and,
- a biasing device that biases the gun bolt forward;
- wherein on firing the arm, the arm is operable to:
- 1) move the gun bolt rearward to cause the piston to move with respect to the cylinder to:
- (a) compress the cylinder fluid within the cylinder bore to dampen rearward gun bolt speed;
- and then (b) move the cylinder with respect to the other of the gun bolt and the surface to create a vent that communicates the cylinder bore to an exterior of the cylinder bore;
- and then (c) force cylinder fluid to exit through the vent to the exterior of the cylinder bore;
- and
- 2) move the gun bolt forward to cause the piston to move with respect to the cylinder to reduce the pressure of cylinder fluid within the cylinder bore to dampen forward gun bolt speed.
15 more elements
Dependencies are inferred from the claim text.