Hydraulic buffer with fast startup

1. An accumulator assembly for a hammer assembly, the accumulator assembly comprising:

a vessel having an upper portion and a lower portion;

a flexible membrane extending between the upper portion and the lower portion, the membrane dividing the vessel into a first interior chamber and a second interior chamber;

a receptacle located proximate the vessel and in fluid communication with the second interior chamber;

a plunger located at least partially within the receptacle; and

a dampener facing the plunger, the dampener receiving an initial load from a machine, wherein a resistance force to the load drives the plunger towards the dampener, the dampener driving the plunger into the receptacle.

2. The accumulator assembly of claim 1 , wherein the plunger is configured to displace a fluid in the receptacle into the second interior chamber.

3. The accumulator assembly of claim 2 , wherein the fluid is displaced through an escape channel that is in fluid communication with the second interior chamber.

4. The accumulator assembly of claim 3 , wherein the displaced fluid propels the membrane towards the cover and expands the volume of the second interior chamber.

5. The accumulator assembly of claim 3 , wherein upon completing an operation of the hammer assembly, the fluid automatically flows back into the receptacle from the second interior chamber.

6. The accumulator assembly of claim 1 , further comprising a pressurized fluid source in fluid communication with the second interior chamber.