LIQUID STORAGE TANK
A liquid storage tank includes a housing, a piston, a lower cover, an elastic element, and an outlet pipe. The piston is located in the housing. The lower cover is attached to the housing and has a support post extending toward the piston. The piston, the housing, and the lower cover define a tank chamber. The elastic element is connected with the tank hosing and the piston. The outlet pipe communicates with the tank chamber.
1 . A liquid storage tank, comprising:
a housing;
a piston in the housing;
a lower cover attached to the housing and comprising a support post that extends toward the piston, wherein the piston, the housing, and the lower cover define a tank chamber;
an elastic element connected with the housing and the piston; and
an outlet pipe communicating with the tank chamber.
2 . The liquid storage tank of claim 1 , wherein a length of the support post is greater than a distance between the outlet pipe and the lower cover.
3 . The liquid storage tank of claim 1 , wherein the housing further comprises a column, the piston further comprises a rod, and two ends of the elastic element are connected with the column and the rod, respectively.
4 . The liquid storage tank of claim 1 , further comprising:
an inlet pipe communicating with the tank chamber.
5 . The liquid storage tank of claim 1 , wherein the housing further comprises an upper portion opposite to the lower cover, and the upper portion has an air vent therein.
6 . The liquid storage tank of claim 1 , wherein the lower cover and the housing each comprises a screw thread, and the two screw threads are engaged with each other.
7 . The liquid storage tank of claim 1 , further comprising:
an o ring surrounding the piston and located between the housing and the piston.
8 . A liquid storage tank, comprising:
a housing;
a lower cover attached to the housing;
a piston in the housing and comprising a support post that extends toward the lower cover, wherein the piston, the housing, and the lower cover define a tank chamber;
an elastic element connected with the housing and the piston; and
an outlet pipe communicating with the tank chamber.
9 . The liquid storage tank of claim 8 , wherein the outlet pipe is connected with a sidewall of the housing.
10 . The liquid storage tank of claim 1 , wherein a length of the support post is greater than a distance between the outlet pipe and the lower cover.
11 . The liquid storage tank of claim 8 , wherein the outlet pipe is connected with the lower cover.
12 . The liquid storage tank of claim 8 , wherein the lower cover and the housing each comprises a screw thread, and the two screw threads are engaged with each other.
13 . The liquid storage tank of claim 8 , further comprising:
a retaining element passing through the lower cover and fixed to the housing.
14 . A liquid storage tank, comprising:
a housing comprising a protrusion;
a lower cover attached to the housing;
a piston in the housing, wherein the piston, the housing, and the lower cover define a tank chamber;
an elastic element connected with the housing and the piston; and
an outlet pipe communicating with the tank chamber.
15 . The liquid storage tank of claim 14 , wherein a distance between the protrusion and the lower cover is greater than a distance between the lower cover and the outlet pipe.
16 . The liquid storage tank of claim 14 , wherein the lower cover and the housing each comprises a screw thread, and the two screw threads are engaged with each other.
17 . The liquid storage tank of claim 14 , further comprising:
a retaining element passing through the lower cover and fixed to the housing.
18 . A liquid storage tank, comprising:
a housing;
a lower cover attached to the housing;
a piston in the housing, wherein the piston, the housing, and the lower cover define a tank chamber;
an elastic element connected with the housing and the piston, wherein when the elastic element is not compressed, a distance between the piston and the lower cover is greater than a distance between the lower cover and the outlet pipe; and
an outlet pipe communicating with the tank chamber.
19 . The liquid storage tank of claim 18 , wherein the housing further comprises a column, the piston further comprises a rod, and two ends of the elastic element are connected with the column and the rod, respectively.
20 . The liquid storage tank of claim 18 , wherein the lower cover and the housing each comprises a screw thread, and the two screw threads are engaged with each other.