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

Claim 12:
13. The grease gun according to claim 11, further comprising:
a pressure channel disposed at a first end of the spool channel, the pressure channel being in fluid communication with the outlet chamber; and
a third biasing means disposed at a second end of the spool channel, the third biasing means being configured to bias the spool towards the closed position,
wherein an increase in pressure in the outlet chamber causes an increase in pressure in the pressure channel and a resulting increase in pressure in at a first end of the first channel to thereby force the spool against the third biasing means, and wherein at a predetermined level of pressure at the first end of the first channel the spool is configured to move towards the open position.