FLUID PUMP DEVICE

Abstract

A fluid pump device contains: a fluid storage barrel, a cap, and a manual pumping mechanism. The fluid storage barrel includes a fluid accommodation chamber and an air chamber. The cap is configured to close the fluid accommodation chamber and the air chamber, and the cap includes a connector configured to connect with a fluid delivery tube and communicating with the fluid accommodation chamber, an air conduit communicating with the fluid accommodation chamber and the air chamber, and a check valve communicating with the air conduit. The manual pumping mechanism includes a press stem extending through the cap and the air chamber, an operation lever mounted on a top of the press stem, and a one-way piston connected on a bottom of the press stem, wherein the fluid storage barrel includes a single-way discharge valve fixed on a bottom of the air chamber.

Description

FIELD OF THE INVENTION

The present invention relates to a fluid pump device which contains the fluid accommodation chamber and the air chamber of the fluid store barrel one-piece formed to avoid air and fluid leakage.

BACKGROUND OF THE INVENTION

A conventional fluid pump device is applied to discharge fluid out of vehicle via a delivery tube, thus replacing the fluid (i.e., maintenance fluid, oil, fuel, lubricant, or engine oil, etc.).

When the conventional fluid pumping device is operated manually and contains a fluid storage barrel, a pumping mechanism received in the fluid storage barrel, an air accommodation chamber, and a fuel tube. However the pumping mechanism is made of metal, and the fluid storage barrel is made of plastic, thus causing air and fluid leakage easily because of a gap between the air accommodation chamber and the fuel tube.

The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.

SUMMARY OF THE INVENTION

The primary aspect of the present invention is to provide a fluid pump device which contains the fluid accommodation chamber and the air chamber of the fluid store barrel one-piece formed to avoid air and fluid leakage.

To obtain the above mentioned aspect, a fluid pump device provided by the present invention contains: a fluid storage barrel, a cap, and a manual pumping mechanism.

a fluid storage barrel including a fluid accommodation chamber and an air chamber which is one-piece formed with and is separated from and surrounded by the fluid accommodation chamber;

a cap mounted on a top of the fluid storage barrel and configured to close the fluid accommodation chamber and the air chamber, wherein the cap includes a connector configured to connect with a fluid delivery tube and communicating with the fluid accommodation chamber, an air conduit communicating with the fluid accommodation chamber and the air chamber, and a check valve communicating with the air conduit; and

a manual pumping mechanism including a press stem extending through the cap and the air chamber, an operation lever mounted on a top of the press stem, and a one-way piston connected on a bottom of the press stem, wherein the fluid storage barrel includes a single-way discharge valve fixed on a bottom of the air chamber.

Preferably, the check valve has a first spring accommodated in the air conduit, and the check valve has a plug pushed by the first spring to close the air conduit.

Preferably, the cap further includes a guide tube received in the fluid accommodation chamber and connected with the air conduit, the guide tube has multiple through orifices formed on a peripheral side thereof, and the guide tube has a close element received therein and configured to close the multiple through orifices when a level of fluid (such as oil, fuel, lubricant, or engine oil, etc.) in the fluid accommodation chamber increases.

Preferably, the one-way piston includes a first disc, a second disc, and a rubber ring, wherein a slit is defined between the first disc and an inner wall of the air chamber so that the airs flow, the second disc has at least one notch defined thereon and configured to flow the airs, and the rubber ring is defined between the first disc and the second disc and is pushed by the first disc and the second disc; when the first disc is pushed, the slit between the first disc and the inner wall of the air chamber is shaded.

Preferably, the cap further includes a handle fixed on a top thereof.

Preferably, the cap further includes an air inlet defined thereon and communicating with an external environment and the air conduit, and a pressure relief valve configured to close the air inlet, wherein a receiving pressure of the pressure relief valve is more than a receiving pressure of the check valve.

Preferably, a holder is configured to accommodate the fluid store barrel and has multiple discharge holes communicating with the air chamber, the single-way discharge valve is arranged on the holder, and the single-way discharge valve has a second spring and an air discharging valve pushed by the second spring to close the air chamber and the multiple discharge holes.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing the assembly of a fluid pump device according to a preferred embodiment of the present invention.

FIG. 2 is a cross-sectional perspective view showing the exploded components of the pumping device according to the preferred embodiment of the present invention.

FIG. 3 is a perspective view showing the exploded components of a part of the pumping device according to the preferred embodiment of the present invention.

FIG. 4 is a cross sectional view showing the operation of a part of the pumping device according to the preferred embodiment of the present invention.

FIG. 5 is another cross sectional view showing the operation of a part of the pumping device according to the preferred embodiment of the present invention.

FIG. 6 is also another cross sectional view showing the operation of a part of the pumping device according to the preferred embodiment of the present invention.

FIG. 7 is still another cross sectional view showing the operation of a part of the pumping device according to the preferred embodiment of the present invention.

FIG. 8 is another cross-sectional perspective view showing the exploded components of the pumping device according to the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, a preferred embodiment in accordance with the present invention.

With reference to FIGS. 1-3, a fluid pump device according to a preferred embodiment of the present invention comprises: a fluid storage 1, a manual pumping mechanism 2, and a cap 3.

The fluid storage barrel 1 includes a fluid accommodation chamber 11 and an air chamber 12 which is one-piece formed with and is separated from and surrounded by the fluid accommodation chamber 11.

The cap 3 is mounted on a top of the fluid storage barrel 1 and is configured to close the fluid accommodation chamber 11 and the air chamber 12. The cap 3 includes a connector 31 configured to connect with a fluid delivery tube and communicating with the fluid accommodation chamber 11, an air conduit 32 communicating with the fluid accommodation chamber 11 and the air chamber 12, and a check valve 33 communicating with the air conduit 32.

The manual pumping mechanism 2 includes a press stem 21 extending through the cap 3 and the air chamber 12, an operation lever 22 mounted on a top of the press stem 21, and a one-way piston 23 connected on a bottom of the press stem 21, wherein the fluid storage barrel 1 includes a single-way discharge valve 13 fixed on a bottom of the air chamber 12, such that when the one-way piston 23 is pressed, the single-way discharge valve 13 is driven by the one-way piston 23 to discharge airs from the air chamber 12.

Referring to FIG. 4, when desiring to draw fluid, the connector 31 is connected with the fluid delivery tube and an external fluid supply source, and the operation lever 22 is pressed so that the one-way piston 23 matingly contacts with the air chamber 12, and the airs of the fluid accommodation chamber 11 force the check valve 33 to turn on and flow into the air chamber 12 via the air conduit 32. Thereafter, the airs are pumped out of the fluid accommodation chamber 11 to produce a negative pressure, and the external fluid supply source is guided into the fluid accommodation chamber 11 via the connector 31, thus pumping the fluid manually. Preferably, the fluid accommodation chamber 11 and the air chamber 12 of the fluid store barrel 1 are one-piece formed to avoid the air and fluid leakage.

The check valve 33 has a first spring 331 accommodated in the air conduit 32, and the check valve 33 has a plug 332 pushed by the first spring 331 to close the air conduit 32.

The cap 3 further includes a guide tube 34 received in the fluid accommodation chamber 11 and connected with the air conduit 32, wherein the guide tube 34 has multiple through orifices 341 formed on a peripheral side thereof, and the guide tube 34 has a close element 342 received therein and configured to close the multiple through orifices 341 when a level of the fluid in the fluid accommodation chamber 11 increases, as shown in FIG. 7. Thereafter, the manual pumping mechanism 2 does not pump the airs out of the air chamber 12, thus stopping drawing the fluid and avoiding fluid leakage.

As illustrated in FIGS. 5 and 6, the one-way piston 23 includes a first disc 231, a second disc 232, and a rubber ring 233, wherein a slit is defined between the first disc 231 and an inner wall of the air chamber 12 so that the airs flow, the second disc 232 has at least one notch 2321 defined thereon and configured to flow the airs, and the rubber ring 233 is defined between the first disc 231 and the second disc 232 and is pushed by the first disc 231 and the second disc 232. When the first disc 231 is pushed, the slit between the first disc 231 and the inner wall of the air chamber 12 is shaded, the one-way piston 23 moves to press the first disc 231, and the rubber ring 233 is pushed so that an airtight space forms increasingly in the press stem 21 above the one-way piston 23 to draw the airs from the fluid store barrel 1. When the one-way piston 23 moves upward to push the rubber ring 233 by the second disc 232, an airtight effect between the first disc 231 and the press stem 21 is released so that the airs in the air chamber 12 above the one-way piston 23 flow into the air chamber 12 below the one-way piston 23 via the at least one notch 2321.

The cap 3 further includes a handle 35 fixed on a top thereof, an air inlet 36 defined thereon and communicating with an external environment and the air conduit 32, and a pressure relief valve 37 configured to close the air inlet 36, wherein a receiving pressure of the pressure relief valve 37 is more than a receiving pressure of the check valve 33, such that when the fluid accommodation chamber 11 does not accommodate the fluid fully and the fluid is drawn, the check valve 33 is not influenced by the pressure relief valve 37, and when the close element 342 closes the air conduit 32 and the fluid is drawn, the pressure relief valve 37 removes from the air conduit 32 so as to release a pressure in the air conduit 32.

With reference to FIG. 8, a holder 14 is configured to accommodate the fluid store barrel 1 and has multiple discharge holes 141 communicating with the air chamber 12, wherein the single-way discharge valve 13 is arranged on the holder 14, and the single-way discharge valve 13 has a second spring 131 and an air discharging valve 132 pushed by the second spring 131 to close the air chamber 12 and the multiple discharge holes 141, such that when the one-way piston 23 presses the air discharging valve 132, the airs push the second spring 131 so that the airs are discharged out of the air chamber 12 via the multiple discharge holes 141.

While various embodiments in accordance with the present invention have been shown and described, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

Claims

1. A fluid pump device comprising: a fluid storage barrel including a fluid accommodation chamber and an air chamber which is one-piece formed with and is separated from and surrounded by the fluid accommodation chamber;a cap mounted on a top of the fluid storage barrel and configured to close the fluid accommodation chamber and the air chamber, wherein the cap includes a connector configured to connect with a fluid delivery tube and communicating with the fluid accommodation chamber, an air conduit communicating with the fluid accommodation chamber and the air chamber, and a check valve communicating with the air conduit; anda manual pumping mechanism including a press stem extending through the cap and the air chamber, an operation lever mounted on a top of the press stem, and a one-way piston connected on a bottom of the press stem, wherein the fluid storage barrel includes a single-way discharge valve fixed on a bottom of the air chamber.

2. The fluid pump device as claimed in claim 1, wherein the check valve has a first spring accommodated in the air conduit, and the check valve has a plug pushed by the first spring to close the air conduit.

3. The fluid pump device as claimed in claim 1, wherein the cap further includes a guide tube received in the fluid accommodation chamber and connected with the air conduit, the guide tube has multiple through orifices formed on a peripheral side thereof, and the guide tube has a close element received therein and configured to close the multiple through orifices when a level of the fluid in the fluid accommodation chamber increases.

4. The fluid pump device as claimed in claim 1, wherein the one-way piston includes a first disc, a second disc, and a rubber ring, wherein a slit is defined between the first disc and an inner wall of the air chamber so that the airs flow, the second disc has at least one notch defined thereon and configured to flow the airs, and the rubber ring is defined between the first disc and the second disc and is pushed by the first disc and the second disc; when the first disc is pushed, the slit between the first disc and the inner wall of the air chamber is shaded.

5. The fluid pump device as claimed in claim 1, wherein the cap further includes a handle fixed on a top thereof.

6. The fluid pump device as claimed in claim 1, wherein the cap further includes an air inlet defined thereon and communicating with an external environment and the air conduit, and a pressure relief valve configured to close the air inlet, wherein a receiving pressure of the pressure relief valve is more than a receiving pressure of the check valve.

7. The fluid pump device as claimed in claim 1, wherein a holder is configured to accommodate the fluid store barrel and has multiple discharge holes communicating with the air chamber, the single-way discharge valve is arranged on the holder, and the single-way discharge valve has a second spring and an air discharging valve pushed by the second spring to close the air chamber and the multiple discharge holes.