# Patent

## Title
Inflating module for use with an inflatable object

## Abstract

An inflating module adapted to an inflatable object includes an air pump assembly selectively operable to deflate and inflate the inflatable object and a supplemental air pressure providing device automatically activated to provide supplemental air pressure to the inflatable object when the air pressure of the inflatable object is down and below a predetermined level so as to maintain air pressure of the inflatable object in a predetermined range.

## Background
CROSS REFERENCE TO RELATED APPLICATION
Not available.
1. Field of the Invention
The present invention relates to an inflating module, and more particularly, to an inflating module used in an inflatable object so as to inflate the inflatable object and provide supplemental air pressure to the inflatable object when the air pressure of the inflatable object is under a predetermined level.
2. Description of the Prior Art
Inflatable objects have been extensively used in all kinds of applications, e.g. in hospitals for patients, outdoors for recreations and indoors for comfort. No matter what application and in what site the inflatable object is used, one thing in common for all users is that all the inflatable objects leak eventually, which causes discomfort for the users. To avoid such a situation, the user will have to constantly check the air pressure of the inflatable objects to make sure the inflatable objects provide the required comfort.
While there is a leak in the inflatable object, the user turns on the air pump to increase the air pressure inside the inflatable object and when the air pressure reaches the required level, the user turns off the air pump. This routine may be readily done during the daytime for the illumination is enough to do whatever is necessary. However, during the nighttime, especially when the user is asleep, not only the illumination is seriously insufficient, the user's willingness to undergo a troubleshooting process is also extremely low.
To avoid the inconvenience caused by the leak of the inflatable object, the best policy is that the air pressure of the inflatable object is maintained the entire time when the inflatable object is in use. And to maintain the air pressure of the inflatable object, the best option is to use another air pump to provide additional air pressure to the inflatable object in time when the air pressure of the inflatable object is decreasing. However, manual operation of the air pump to provide additional air pressure to the inflatable object is impractical and not necessary. Besides the noise from the operation of another air pump may sometimes causes sleeping disorders to the people around the air pump.
As a result of the above, it is an objective of the present invention to provide an inflating module to not only inflate the inflatable object, but also automatically provide additional air pressure when the air pressure of the inflatable object is decreasing.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a controlling mechanism for operation of an air pump that is used in an inflatable object. The controlling mechanism includes a valve controlling assembly responsible for open/close operation of a valve, a pressure controlling assembly responsible for sensing pressure difference to selectively activate the operation of the valve and a linkage assembly interactively sandwiched between the valve controlling assembly and the pressure controlling assembly to sense the operation of the pressure controlling assembly and consequently operate the movement of the valve controlling assembly.
In a preferred embodiment of the present invention, another objective of the present invention is that the actuation/deactivation of the air pump is controllable by the valve controlling assembly, the pressure controlling assembly or the linkage.
In a preferred embodiment of the present invention, another objective of the present invention is that the pressure controlling assembly is actuated by resilience force, atmospheric/inflatable object pressure or the combination thereof.
In a preferred embodiment of the present invention, another objective of the present invention is to have an automatic supplemental air pressure providing device in association with the operation of the air pump such that whenever there is a pressure decrease in the inflatable object, without the actuation of the air pump, the supplemental air pressure providing device is able to automatically provide air pressure to the inflatable object to maintain the inflatable object pressure at a predetermined level.
Another objective of the present invention is that the valve controlling assembly is able to select one of air paths for air to flow in/out of the inflatable object.
These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a top plan view of the valve controlling assembly of the present invention;
FIG. 2A is a cross sectional view showing the valve controlling assembly in association with the pressure sensing assembly of the present invention;
FIG. 2B is a partially cross sectional view showing the interaction between the knob and the valve of the valve controlling assembly of the present invention;
FIG. 3A is a cross sectional view showing the operation of the valve controlling assembly consequently leads the open of an inflow path to allow air outside the inflatable object to flow into the inflatable object;
FIG. 3B is a cross sectional view showing the operation of the valve controlling assembly consequently leads the open of an outflow path to allow air inside the inflatable object to flow out of the inflatable object;
FIG. 4A is a perspective view showing the structure of a portion of the valve controlling assembly of the present invention;
FIG. 4B is a perspective view showing the structure of another portion of the valve controlling assembly of the present invention;
FIG. 4C is a perspective view showing the consequence of the rotation of the knob of the valve controlling assembly of the present invention;
FIG. 4D is still a perspective view showing the consequence of the rotation of the knob of the valve controlling assembly of the present invention;
FIG. 5 is a plan view showing the internal structure of the supplemental air pressure providing device of the present invention;
FIG. 6 is a cross sectional view from line B-B of FIG. 5;
FIG. 7 is a cross sectional view showing the structure of the supplemental air pressure providing device of the present invention;
FIG. 8 is a perspective view of the supplemental air pressure providing device of the present invention;
FIG. 9 is a top plan view of the supplemental air pressure providing device of the present invention;
FIG. 10 is a cross sectional view from line C-C of FIG. 9;
FIG. 11 is cross sectional view showing the internal structure of the supplemental air pressure providing device;
FIG. 12 is a schematic cross sectional view showing the operation of the supplemental air pressure providing device of the present invention; and
FIG. 13 is still another schematic cross sectional view showing the operation of the supplemental air pressure providing device in a different state.



DETAILED DESCRIPTION
With reference to FIGS. 1, 2A ̃2B, 3A ̃3B and FIGS. 4A ̃4D, an inflating module constructed in accordance with the preferred embodiment of the present invention is shown and has a housing 20 associated with an inflatable object 7. Within the housing 20, a valve controlling assembly for controlling operation of an air pump 6, movement of a valve 16 as well as a path selection mechanism. The valve controlling assembly in accordance with the present invention includes a knob 1 with a shaft 14 integrally extended from the knob 1 and having a cam 140 formed on an outer periphery of the shaft 14 to be responsible for movement of an engagement shaft 15 since one of the mostly protruding ends of the cam 140 is selectively engaged with the engagement shaft 15 and a valve 16 securely formed with a spring abutted shaft 17. From the drawing of FIG. 2B, it is learned that one end of the spring abutted shaft 17 has the valve 16 integrally formed and the other end thereof is securely engaged with a distal end of the engagement shaft 15. As a result of the arrangement of the spring abutted shaft 17, it is noted that when the distal end of the spring abutted shaft 17 is pushed and the spring (shown but not numbered) is contracted, the valve 16 is thus away from the housing 20. Yet, from the illustration of FIGS. 1, 2A and 3A, it is noted that when the knob 1 is rotated so as to simultaneously rotate the shaft 14, the cam 140 is consequently rotated, which leads the movement of the engagement shaft 15. Eventually the valve 16 is pushed away from the sidewall of the housing 20. A further illustration from FIGS. 1, 2A, 3A 3B and 4B, 4C shows that a contact disk 5 is formed on the outer periphery of the shaft 14 so that the contact disk 5 is selectively rotated in relation to the movement of the knob 1. The contact disk 5 is provided with electrical contacts (not shown) formed thereon to selectively contact a switch 2 with which the air pump 6 is electrically connected. Therefore, it is noted that rotation of the knob 1 is able to control the movement of the valve 16 as well as the operation of the air pump 6.
Aside from the description of the structure as well as the movement of the valve controlling assembly, near the bottom end of the shaft 14, a plurality of threaded-like arcuate wedges 141 are formed on the outer periphery of the shaft 14. A pivot 142 is pivotally formed on a sidewall of the housing 20 and has a ledge 143 integrally formed on a distal end thereof to mate with the arcuate wedges 141. The pivot 142 is further provided with an integrally formed path assembly 3 which has at least one air path formed to selectively communicate the internal space of the inflatable object with the internal space of the air pump 6. In this embodiment of the present invention, it is noted that there is at least one air path 31 formed on the path assembly 3. Therefore, the rotation of the knob 1 leads the rotation of the arcuate wedges 141, which forces the ledge 143 to move either upward or downward to allow the air path 31 to communicate with the internal space of the air pump 6. Therefore, it is also learned that the rotation of the knob 1 can also determine the path of air flow, i.e. into or out of the inflatable object.
From the illustration of FIGS. 3A, 3B, 4A ̃4D, as an example of the operation of the path selection mechanism, it is learned that when the knob 1 is rotated to activate the operation of the air pump 6 as well as the movement of the valve 16, the arcuate wedges 141 are also rotated. As the ledge 143 is mated with the arcuate wedges 141, the ledge 141 is moved, which ultimately leads the pivot 142 to move. Because the pivot 142 is integrally formed with the path assembly 3, movement of the pivot 142 moves the path assembly 3, up and down in this embodiment such that a predetermined air path is decided when turning the knob 1 clockwise or counterclockwise.
As described, the rotation of the knob 1 can be clockwise or counterclockwise and because of the provision of the contact disk 5 on the shaft 14, the air pump 6 can be activated to provide air flow into or out of the inflatable object, as can best be seen from FIGS. 3A and 3B.
With reference to FIGS. 5-11, it is noted that the automatic supplemental air pressure providing device of one preferred embodiment of the present invention has an outer housing 43 with a first inlet 21. Inside the outer housing 43, an inner housing 23 is integrally formed and has a second inlet 22, a nozzle 39 and a first air chamber 46 defined inside the inner housing 23. The first air chamber 46 is composed of a casing 25 having an inlet 24 and an outlet 29, an oscillator 42 and an air blower 50 operatably connected to the oscillator 42 to provide supplemental air pressure to the inflatable object when needed. The air blower 50 includes a metal housing 47 and a rubber cap 48 securely fixed inside the metal housing 47. A first check valve 26 and a second check valve 27 are provided inside the rubber cap 48 to allow air to sequentially flow through the first check valve 26 and the second check valve 27. The air chamber 46 also has a absorbent (such as a cotton silencer) 28 provided therein to keep the noise caused by the operation of the air blower 50 as low as possible. It is reasonable to assume that the activation of the air pump 6 in the preferred embodiment can also activate the operation of the automatic supplemental air pressure providing device in a standby mode. After the supplemental air pressure providing device is in a standby mode, a pressure controlling assembly 121/122 as described starts monitoring air pressure in the inflatable object. Once the air pressure inside the inflatable object is below a predetermined range, the supplemental air pressure providing device will then automatically provide air pressure to the inflatable object to always maintain the air pressure of the inflatable object within a predetermined range.
The operational sequence of the automatic supplemental air pressure providing device of a preferred embodiment of the present invention is that after the oscillator 42 is activated electrically, magnets provided on top of the metal casing 47 will be moved by the activated oscillator 42. As the magnets (not numbered) are securely provided on an outer periphery of the metal casing 47, movement of the magnets drives the metal casing 47 to move simultaneously. Movement of the metal casing leads the rubber cap 48 to move like a bellow, which drives air sucked in from ambient to flow through the first check valve 26, the second check valve 27, the absorbent 28 and the outlet 29. Once the air flow is out of the outlet 29, it is flowing into the second chamber 52, as shown in FIGS. 12 and 13.
With reference to FIGS. 6 and 10, the inner casing 23 further has a second air chamber 52 with an inlet 30 and the nozzle 39. An air duct 40 is provided between the nozzles 39, 41. To enhance the air flow inside the second air chamber 52, a check valve 32 and further absorbent 37, 38 are provided. The check valve 32 has an outlet 33 and a unidirectional cap 34 with an outlet 35 defined in the unidirectional cap 34. In order to strengthen the ability to lower down the noise, additional absorbent or silencer may also be applied to the inlet 22 and/or the nozzle 41. Between the outer housing 43 and the inner housing 23, noise silencer 44, such as rubber, may be added to harmonize the vibrations.
When the automatic supplemental air pressure providing device of the preferred embodiment of the present invention is in operation, it is learned that air flows from the inlet 21 and enters the outer casing 43. Then the air continues to flow through the second inlet 22 and enters the inner housing 23. Through the inlet 24, the air flows into the casing 25 and passes the first check valve 26 and the second check valve 27 before passing through the space 51 where the air is compressed due to the movement of the metal casing 47 as well as the rubber cap 48. Eventually the air exits from the outlet 29 after passing through the absorbent 28. Then the air flows into the second air chamber 31 and passes through the check valve 32, the outlet 33 and enters the unidirectional cap 34. Finally, the air flows to the chamber 36 from the outlet 35 and reaches absorbent 37, 38 and eventually reaches the inflatable object from the nozzle 39 before passing through the air duct 40. From the structure as described hereinbefore, it is learned that all the vibrations, noise caused by the operation of either or both the air blower and the air pump shall be minimized to reach a goal of providing a quiet and comforting structure to the user.
It is to be noted that although the preferred embodiment of the present invention has been described, other modifications, alterations or minor change to the structure should still be within the scope defined in the claims. As those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention.

## Claims

1. An inflating module adapted to an inflatable object, the inflating module comprising:
an air pump assembly selectively operable to inflate the inflatable object;
a pressure controlling assembly configured to monitor air pressure in the inflatable object after inflation of the inflatable body;
a supplemental air pressure providing device, wherein the pressure controlling assembly is configured to automatically activate the supplemental air pressure providing device when the air pressure inside the inflatable object decreases below a predetermined threshold after inflation, and to control the supplemental air pressure providing device to provide supplemental air pressure to the inflatable object so as to maintain the air pressure of the inflatable object within a predetermined range.

2. The inflating module as claimed in claim 1, wherein the air pump assembly comprises a controlling mechanism having:
a valve controlling assembly comprising:
a knob freely rotatable in clockwise or counterclockwise;
a shaft integrally extending from the knob and having a cam formed on an outer periphery thereof; and
a valve formed to contact with the cam so as to be selectively pushed by movement of the cam when being moved by the rotation of the knob to allow air to flow in or out of the inflatable object depending on the rotation of the knob.

3. The inflating module as claimed in claim 2, wherein the valve is formed on a spring abutted shaft such that when the knob is rotated to drive the cam to rotate accordingly, the spring abutted shaft is able to move in a first direction to extend the valve and when the cam is rotated for a second time, the valve is retrieved by resilience force from the spring abutted shaft.

4. The inflating module as claimed in claim 2 further comprising a path selection mechanism, the path selection mechanism having at least one pivotable air path inside the air pump assembly for communicating internal space of the air pump assembly with internal space of the inflatable object to be able to direct air flow between the air pump assembly and the inflatable object.

5. The inflating module as claimed in claim 4, wherein the path selection mechanism further has multiple arcuate wedges formed on an outer periphery of the shaft, a pivot pivotally mounted on the air pump assembly and a ledge securely formed with the pivot to mate with the arcuate wedges such that when the knob is rotated to drive the arcuate wedges to rotate, the ledges is driven to move and the pivot is pivoted to allow the at least one air path to pivot.

6. The inflating module as claimed in claim 5, wherein the supplemental air pressure providing device has a housing with an air blower operably received inside the housing to provide supplemental air pressure, an air chamber defined inside the housing for receiving therein absorbent such that noise caused by the operation of the air blower is minimized by the absorbent.

7. The inflating module as claimed in claim 6, wherein the supplemental air pressure providing device has a housing with an air blower operably received inside the housing to provide supplemental air pressure, an air chamber defined inside the housing for receiving therein absorbent and a noise silencer securely attached to the housing such that noise caused by the operation of the air blower is minimized by the absorbent and the noise silencer.

8. The inflating module as claimed in claim 3 further comprising a path selection mechanism, the path selection mechanism having at least one pivotable air path inside the air pump assembly for communicating internal space of the air pump assembly with internal space of the inflatable object to be able to direct air flow between the air pump assembly and the inflatable object.

9. The inflating module as claimed in claim 8, wherein the path selection mechanism further has multiple arcuate wedges formed on an outer periphery of the shaft, a pivot pivotally mounted on the air pump assembly and a ledge securely formed with the pivot to mate with the arcuate wedges such that when the knob is rotated to drive the arcuate wedges to rotate, the ledges is driven to move and the pivot is pivoted to allow the at least one air path to pivot.

10. The inflating module as claimed in claim 9, wherein the supplemental air pressure providing device has a housing with an air blower operably received inside the housing to provide supplemental air pressure, an air chamber defined inside the housing for receiving therein absorbent such that noise caused by the operation of the air blower is minimized by the absorbent.

11. The inflating module as claimed in claim 10, wherein the supplemental air pressure providing device has a housing with an air blower operably received inside the housing to provide supplemental air pressure, an air chamber defined inside the housing for receiving therein absorbent and a noise silencer securely attached to the housing such that noise caused by the operation of the air blower is minimized by the absorbent and the noise silencer.

12. The inflating module as claimed in claim 1, wherein the supplemental air pressure providing device has a housing with an air blower operably received inside the housing to provide supplemental air pressure, an air chamber defined inside the housing for receiving therein absorbent such that noise caused by the operation of the air blower is minimized by the absorbent.

13. The inflating module as claimed in claim 12, wherein the supplemental air pressure providing device has a housing with an air blower operably received inside the housing to provide supplemental air pressure, an air chamber defined inside the housing for receiving therein absorbent and a noise silencer securely attached to the housing such that noise caused by the operation of the air blower is minimized by the absorbent and the noise silencer.

14. The inflating module as claimed in claim 1, wherein the supplemental air pressure providing device further comprises an outer housing with an inner housing integrally formed inside.

15. The inflating module as claimed in claim 14, wherein the supplemental air pressure providing device further comprises at least one noise silencer positioned between the outer housing and the inner housing.

16. The inflating module as claimed in claim 1, wherein the supplemental air pressure providing device further comprises noise silencing means connected to a nozzle for reducing noise inside the nozzle.

17. An inflating module adapted to an inflatable object, the inflating module comprising:
an air pump assembly selectively operable to inflate the inflatable object;
a supplemental air pressure providing device automatically activated to provide supplemental air pressure to the inflatable object so as to maintain air pressure of the inflatable object in a predetermined range; and
a path selection mechanism, the path selection mechanism having at least one pivotable air path inside the air pump assembly for communicating internal space of the air pump assembly with internal space of the inflatable object to be able to direct air flow between the air pump assembly and the inflatable object.

18. The inflating module as claimed in claim 17, wherein the path selection mechanism further has multiple arcuate wedges formed on an outer periphery of the shaft, a pivot pivotally mounted on the air pump assembly and a ledge securely formed with the pivot to mate with the arcuate wedges such that when the knob is rotated to drive the arcuate wedges to rotate, the ledges is driven to move and the pivot is pivoted to allow the at least one air path to pivot.

19. The inflating module as claimed in claim 18, wherein the supplemental air pressure providing device has a housing with an air blower operably received inside the housing to provide supplemental air pressure, an air chamber defined inside the housing for receiving therein absorbent such that noise caused by the operation of the air blower is minimized by the absorbent.

20. The inflating module as claimed in claim 19, wherein the supplemental air pressure providing device has a housing with an air blower operably received inside the housing to provide supplemental air pressure, an air chamber defined inside the housing for receiving therein absorbent and a noise silencer securely attached to the housing such that noise caused by the operation of the air blower is minimized by the absorbent and the noise silencer.

21. An inflating module adapted to an inflatable object, the inflating module comprising:
an air pump assembly selectively operable to inflate the inflatable object, the air pump assembly comprises a controlling mechanism having a valve controlling assembly comprising:
a knob freely rotatable in clockwise or counterclockwise;
a shaft integrally extending from the knob and having a cam formed on an outer periphery thereof; and
a valve formed to contact with the cam so as to be selectively pushed by movement of the cam when being moved by the rotation of the knob to allow air to flow in or out of the inflatable object depending on the rotation of the knob, wherein the valve is formed on a spring abutted shaft such that when the knob is rotated to drive the cam to rotate accordingly, the spring abutted shaft is able to move in a first direction to extend the valve and when the cam is rotated for a second time, the valve is retrieved by resilience force from the spring abutted shaft;

a supplemental air pressure providing device automatically activated to provide supplemental air pressure to the inflatable object so as to maintain air pressure of the inflatable object in a predetermined range; and
a path selection mechanism, the path selection mechanism having at least one pivotable air path inside the air pump assembly for communicating internal space of the air pump assembly with internal space of the inflatable object to be able to direct air flow between the air pump assembly and the inflatable object;
wherein the supplemental air pressure providing device has a housing with an air blower operably received inside the housing to provide supplemental air pressure, an air chamber defined inside the housing for receiving therein absorbent such that noise caused by the operation of the air blower is minimized by the absorbent.

22. The inflating module as claimed in claim 21, wherein the supplemental air pressure providing device has a housing with an air blower operably received inside the housing to provide supplemental air pressure, an air chamber defined inside the housing for receiving therein absorbent and a noise silencer securely attached to the housing such that noise caused by the operation of the air blower is minimized by the absorbent and the noise silencer.