Patent ID: 11898696
Assignee: MACNAUGHT PTY LTD
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 13:
14. The grease gun according to claim 13, wherein the spool comprises:
a first annular ring and a second annular ring that is spaced from the first annular ring; and
a mid-section that is disposed between and boundaried by the first and second annular rings;
the mid-section of the spool having a smaller diameter than a diameter of the spool channel and a diameter of the first and second annular rings;
wherein an area disposed between the mid-section of the spool and a wall of the spool channel forms a communication channel, the communication channel being in fluid communication with the primary bypass channel regardless of whether the spool is in the open position or the closed position.