Patent ID: 11953634
Assignee: SERCEL
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. A seismic source for generating seismic waves under water, the seismic source comprising:
an operating head having discharge ports;
a firing chamber attached to the operating head, the firing chamber configured to hold compressed air to be discharged through the discharge ports; and
a shuttle assembly having a shaft located within the operating head and configured to prevent the compressed air in the firing chamber to enter the discharge ports when in a close state, and to allow the compressed air in the firing chamber to be discharged through the discharge ports when in an open state,
wherein the shaft of the shuttle assembly has an external surface, the shaft has a longitudinal channel having a varying depth, and the longitudinal channel is formed in the external surface so that air passes from the operating chamber to the cushion chamber, when in the open state, through the channel.