Patent ID: 8495770

Claim:
A nozzle device, comprising: a cylinder; and a piston configured to advance in a first direction to project from the cylinder and retreat in an opposing direction, which is opposite to the first direction, such that the piston is accommodated within the cylinder, wherein the piston includes: a spray hole for spraying washing water; a pipe forming a first flow path configured to extend in the first direction; and a cover member that includes a peripheral wall having a cylindrical shape configured to both surround the pipe and extend in the first direction, a front end of the cover member extending traverse to the first direction, the peripheral wall and the front end of the cover member being integrally formed of a cylindrical metal, the peripheral wall of the cover member having an upper surface extending in the first direction, wherein the spray hole is provided on the upper surface, and the front end of the cover member is closed so as to prevent the washing water from exiting therethrough in the first direction, a space between an outer surface of the pipe and an inner peripheral surface of the peripheral wall of the cover member forming a second flow path configured to cause the washing water to flow in the first direction, the second flow path being configured to surround the outer surface of the pipe in a circumferential direction of the cover member, the nozzle device further comprising: a spray member configured to merge the washing water to be supplied from the first flow path and the washing water to be supplied from the second flow path and introduce the merged washing water into the spray hole to cause the washing water to be sprayed from the spray hole in a second direction traverse to the first direction, the spray member being provided between the front end of the pipe and the cover member.