Patent ID: 11959470
Assignee: nan
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 12:
13. A relief device in an air pump configured for dispensing a trace amount of air from the air pump, comprising:
a main body defining an interior space and a discharge passage fluidly communicating with each other, wherein the discharge passage extends from a first end adjacent to the interior space to a second end which fluidly communicates with the outside of the main body, wherein the discharge passage is selectively closed and opened to the outside of the main body by a valve device, wherein the valve device is movable in the discharge passage, wherein the valve device includes a first sealing portion and a second sealing portion selectively engaging with the discharge passage to prevent air discharged to the outside of the main body through the discharge passage, wherein the valve device is movable between a first position in which one of the first and the second sealing portions engages with the discharge passage and a second position in which the other of the first and the second sealing portion engages with the discharge passage, wherein the discharge passage has a first length measuring from the first end to the second end thereof, wherein the first length is smaller than a second length which measures a separation distance between the first and the second sealing portions, wherein the main body includes a cap coupled thereto for retaining the valve device in the main body, wherein the cap defines the discharge passage, wherein the discharge passage has a first width perpendicular to the first length, and wherein the cap is hollow which includes a middle portion defining the discharge passage and end portions with a greater width than the first width.