CN1074729C - Pressure indicating device - Google Patents
Pressure indicating device Download PDFInfo
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- CN1074729C CN1074729C CN96180288A CN96180288A CN1074729C CN 1074729 C CN1074729 C CN 1074729C CN 96180288 A CN96180288 A CN 96180288A CN 96180288 A CN96180288 A CN 96180288A CN 1074729 C CN1074729 C CN 1074729C
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- pressure
- indication means
- film
- cavity
- inlet
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Abstract
The present invention discloses a pressure indicating device (2), which is used for being fixed on a tyre air valve for example. The present invention is pressed on the wall of a permanent air-tight hollow cavity with specified pressure, and comprises an air-tight flexible thin film (7). Mechanical connecting rods (10, 12) move according to the fact that pressure of the tyre provided with the present invention is higher than or lower than that of the hollow cavity (8) and rotate a double color ball (14), and a displayed color provides a visual signal. The signal indicates whether the pressure of the tyre is higher than or lower than the specified pressure, and people can easily find out that the tyre leaks or air leaks.
Description
The present invention relates to a kind of pressure-indication means, particularly, but and the not exclusive device that has related to the indication automotive tire pressure.
In the quite a while, various pressure-indication means have been arranged, its great majority provide the device of accurate gaging pressure, particularly measurement gas and fluid pressure.
In some cases, do not need accurate gaging pressure, but wish to have a kind of simple and clearly indication of pressure variation.The for example leakage of detected pressures container.In this case, provide a kind of and " know at a glance " that very intuitively the indicating device that is leaking is than accurately the digital measurement container inner pressure is practical more.
Existing this device in current techniques.For example, a kind of whether device of pressurising of gas circuit of indicating, its trade mark is called ROTOWINK (production of ex Norgren Martonair Co., Ltd).This device is applicable to and is contained on the control desk, its inlet and air path part, and for example the pressure container of air compressor tank and so on is connected.Device comprises an airtight fexible film that stretches tight on inlet.Film supports one can be by the piston of spring reset.
From the extended connecting rod of piston and the crank mechanism terminating head at device, away from the entrance, connecting rod is connected in a rotating ball with crank, and the relative two halves of ball have different colours, for example redness and green.Ball is contained in below the eyeglass, can be clear that a side of ball from the device outside by it.
For example since with device portal bonded assembly pressure chamber in produce air pressure, make the film both sides produce pressure reduction, cause the head-bent of film towards device, it pushes piston and connecting rod to head.This motion makes crank cause the rotation of ball, thereby can see the opposite side of ball by eyeglass.Opposite side with the ball that sets off by contrast color provides signal clearly directly perceived, shows to have produced pressure in the pressure chamber.
Wish very much vehicle tyre for safety, fuel-efficient, comfortable and remain on the optimum pressure, and life of tire.Therefore, pressure that preferably can the periodic inspection tire.But, this businesslike work often is left in the basket, because have only when tire look flatten danger close and/or when feeling under the weather by bus, just can perceive the pressure lower than best tire pressure, for example reduce, and this moment, tire pressure was lower much than optimum pressure because of the pressure of leaking slowly or forbidden to cause because of measurement on pump or the compression air feed equipment.Obviously, air pressure begin to be lost to found during, vehicle operation will reduce tire life greatly, and make vehicle driver and passenger bear certain risk.
One or several inflation of tire is too sufficient rather than not enough, drives this automobile and also has danger, though this does not usually take place.
Various tire inflation pressure determining apparatus have been managed to provide in the past.US Patent specification 4814745 has been described a kind of at the cap sleeve that is contained in behind the inflation of tire on the tire valve, and it comprises an alarm circuit, and it cuts off the power supply during to suitable pressure at inflation of tire.But cap sleeve must comprise its power supply and other circuit element, and its is undue complicated, be easy to damage and spend too many.
US Patent specification 4819686 has been issued a kind of device of pure machinery, is included in the film in the cavity.Film can be out of shape, and provides the indication directly perceived of tyre inner pressure state.One side of film is so-called reference cavity, and when handlebar device was contained on the tyre valve core, its pressurising was to the interior pressure of tire.Reference cavity is sealed then, and is subjected to pressure in the tire at the opposite side of film, if therefore latter's pressure reduces, film will move.This structure is quite complicated, and cap sleeve can not provide tire whether to be inflated to the indication of correct pressure.This device only can be represented the pressure drop of whole time effectively.British patent specification 2277802 has been issued similar device, but wherein only adopts a hand-held device to reach the indication of tire pressure state, and device is suitable for being placed on the place near valve inside.It exists shortcoming same as described above.
US-A-2689481 has described a kind of tire pressure indicating device, and it has comprised a housing, and housing can be screwed onto on the tyre valve core, and comprises an inlet that makes pressure air enter the transparent wall cavity from tire.Cavity comprises an air tight bellows, and the compression degree of bellows has changed its length, combines with the exterior mark of cavity, and the indication of tire pressure is provided.
According to the present invention, a kind of pressure-indication means can be provided, it comprises a shell, shell has the inlet of a pressure air, a permanent gastight cavity that comprises pressure air, flexible piece between inlet and cavity, and signalling apparatus, the signal of signalling apparatus is relevant with the pressure reduction between inlet and the cavity, pressure-indication means is characterised in that: flexible piece is flexible airtight film, when inlet pressure increases, film is bent to towards the pressurising cavity and stretches, and device comprises a connecting device between film and signalling apparatus, and it is suitable for the actuation signal device provides a signal, and signal has been represented the inlet pressure with respect to sealed cavity pressure.Signalling apparatus preferably is positioned within the sealed cavity.
If this device is as the tire pressure indicating device, when this device being contained in the dust cap that substitutes routine on the valve inside, can fit in inlet and valve formation sealing contact, when further device for screwing up, tire valve is opened, and makes that the pressure of inlet is identical with tyre inner pressure.
Preferably the cavity pressurising to the best tire pressure that just is lower than particular vehicle (best tire pressure is taken from the pressure that the vehicle manufacturer recommends).Therefore, when device is connected with valve and opens valve, pressure reduction between tire elevated pressures and cavity lower pressure makes airtight fexible film bending, thereby the cavity towards pressurising stretches, and the actuation signal device, provide a representative with respect to sealed cavity pressure tires pressure signal.
Membrane structure can be square position shape or (it can improve the sensitivity of service life and film) roll extrusion film.
Signalling apparatus preferably can provide two signals that can intuitively distinguish at least.Adopt as be mounted to the easiest this point that reaches of mechanical device of rotatable ball, a side of ball is a kind of color, and opposite side is a kind of still interpretable color of setting off by contrast, and provides any mechanical device of sort signal can be replaced.Signal is preferably in the wide angular field of view, as can see clearly Chu in 110 degree or above visual angle.
Airtight fexible film and the preferably simple mechanical linkage of signalling apparatus bonded assembly device, it can transmit any motion of film when film actuation signal device.Preferably, a spring reset piston that has elongate articles is contained on the film, elongate articles end and crank are hinged, and crank is connected with the roating sphere signalling apparatus.During use, any bending of film or flatten will make ball in one way or another kind of mode rotate.
According to special optimization feature of the present invention, film can have the district of weakening, has reached predetermined value if tire pressure surpasses cavity pressure, and then film can break.As adopt this film, and install to when device on the tire of a hyperinflation, then indicating device will temporarily be indicated suitable tire pressure, film breaks then, all can not use.
The inlet of device preferably has tapped bore, and the end in the hole has an axial plush copper, and the central pin of conventional tire valve can be pushed down in its position, and it is opened.In order to guarantee the sealing contact of valve and device, and prevent that air from overflowing in tire, inlet preferably comprises a favorably situated O shape circle.
Therefore tire pressure indicating device of the present invention can easily be contained on the tire valve of any routine, demonstrates signal clearly directly perceived, indicates the air pressure conditions of tire.It can cheap ground stock production.It also is a light-duty global facility, and the indication of breaking voluntarily is provided.
Referring now to accompanying drawing, device of the present invention is only described as an example, wherein:
Fig. 1 is the vertical cut-away schematic view by pressure-indication means of the present invention, and wherein film is complete case of bending,
Fig. 2 is the device of Fig. 1, and wherein film is in inlet and also is not contained in position on the tire valve.
With reference to Fig. 1, be screwed in the mode of valve housing 1 with screw thread, have the tire low pressure alarm device 2 that is roughly cylinder blanket 9 to one and be contained on the valve for vehicle tire.In a plush copper 6 of installing 2 shell inner bolt holes, 4 ends, pushed down the center pin 21 of valve.O shape circle 5 sealing contacts that guaranteed between device and the valve cage body 1.Push down pin 21, can make pressurized air pass through inclined hole 3, enter plush copper 6 and be sealed in space between the airtight fexible film 7 on the shell 9 from tire.
In shell 9, illustrate the cavity 8 of film more than 7 by pressurising, and fully permanent airtight when device is made.This cavity 8 has piston 10, and it is compressed spring 13 and pushes film 7 to.Spring 13 withstands on the convex annular round edge 24 in the shell 9.Piston rod 12 extends upward, and is hinged to axle 20, and axle 20 is not the center of just in time passing through twin color ball 14.Ball 14 has two little pins in its outside, and they have determined pivot center 22, and is positioned in shell 9 interior corresponding two structures, thereby ball 14 is dressed up and can be rotated by axis 22 in shell.By the diaphanoscope position 16 of shell 9, can see ball 14 from the device outside.Half of ball represented with G and for green, second half is represented with H and is red.Bar 12 is by the deep-slotted chip breaker on the ball.Piston 10 has perforation 17, and is equal to guarantee at the pressure of piston both sides.
But, have slowly and leak if the tire of this device is installed, then tire pressure reduces.Because tire pressure and sealed cavity pressure balance each other, the pressure in fexible film 7 back reduces will make film flatten.If pressure about equally, then fexible film 7 flattens, thereby piston 10 and bar 12 drop to position shown in Figure 2 in the effect of spring 13.
This downward motion is rotated ball 14, makes and can see half red R from diaphanoscope 16, and therefore signal clearly directly perceived is provided, and indicates tire pressure and lowers.
Be appreciated that, in order to indicate at the complete bending position of film and to flatten intermediateness between the position fully, ball can also go up other color.
Just can realize vehicle tyre for arriving usually when separately observing tire, the phenomenon of leaking slowly and so on of particularly modern " low profile " tire, apparatus of the present invention just can easily detect before this.Easily handlebar device is made according to " conversion " range of pressure, with the tire pressure scope of recommending in the scalable automobile scope.If desired, can provide this device of two covers as standard, a cover is used for not load-carrying or when some load-carryings was only arranged, the another set of vehicle that is used for load-carrying was often recommended high slightly tire pressure this moment of vehicle.
Should be noted that if apparatus of the present invention itself are damaged, for example film 7 breaks, then can indicate this damage to the user immediately; When the tire pressurising behind correct pressure, handlebar device is contained on the tyre valve core, cavity 8 pressure were raised to tire pressure and equated this moment, but owing to spring 13 reasons, mechanical linkage does not move, thereby seems that tire seems still insufficient pressure.If back out device, the fault that ball does not change is just understood at once.
Similarly, if seal ring 5 lost efficacy, perhaps because screw thread is twisted to such an extent that near the shell of seal ring is ftractureed.Then tire pressure descends, and indicating device reddens.
If cavity 8 seal failures, very big pressure reduction will make film 7 break in zone 18, as the explosion of film.If surpassed the pressure of cavity 8 at entrance pressure with given boundary value, for example tire pressure is greater than the twice of cavity 8 pressure, and then film also can break.The tire of this device bears very big overvoltage if screw on, and device will break therefrom, if therefore handlebar device is screwed on the valve inside, just provides the very clearly indication of existing serious problems to the user.
In a kind of alternative method of the confession selecting for use that weakens district 18 is provided, the loss of pressure of cavity 8, perhaps big tire overvoltage can cause bar 12 flexings, and discharge some thing in cavity, makes the window outward appearance change.
The special description of above preferred embodiment and general description of the present invention are meant and tire bonded assembly device, but this device is not limited to this purposes.Therefore it can be used for wishing to detect the similar situation of any pressure drop that is lower than preset value, for example detects the fire extinguisher state of pressurising, detects the gasbag pressure of hydraulic accumulator and the integraty of detection closed conduit.In the end in the application of face, as the inside of the closed conduit in machinery or civil engineering, pressurising is to specified value and load onto device of the present invention.If at pipeline, for example crackle appears in the weld at pipeline one end, and the pipe internal pressure will descend, and watch apparatus of the present invention of top loading can perceive it immediately.
Claims (15)
1. pressure-indication means, it comprises a shell (9), shell has the inlet (3) of a pressure air, a permanent gastight cavity (8) that comprises pressure air, flexible piece (7) between inlet (3) and cavity (8), an and signalling apparatus (14), the signal of signalling apparatus is relevant with the pressure reduction between inlet and the cavity, it is characterized in that: flexible piece is a flexible airtight film (7), when inlet (3) pressure increases, film (7) is bent to towards pressurising cavity (8) and stretches, and device comprises a connecting device (10,12,20) between film (7) and signalling apparatus (14), it is suitable for actuation signal device (14) provides a signal, and signal has been represented the inlet pressure with respect to sealed cavity pressure.
2. according to the pressure-indication means of claim 1, it is characterized in that signalling apparatus (14) is positioned within the cavity (8).
3. according to the pressure-indication means of claim 1 or 2, it is characterized in that inlet is suitable for opening the sealing contact (5) of tire valve (1,21) and formation and valve.
4. according to the pressure-indication means of claim 3, it is characterized in that, for particular vehicle and loading condition thereof, the cavity pressurising to the pressure that just is lower than best tire pressure.
5. arbitrary pressure-indication means is characterized in that inlet comprises a plush copper (6) in requiring according to aforesaid right, and when device was contained on the housing of tire valve, plush copper (6) was suitable for pushing down the central pin (21) of valve.
6. according to the pressure-indication means of claim 5, it is characterized in that inlet comprises a sealing member (5), it is suitable for sealing the connection between tire valve housing (1) and the crust of the device (9).
7. according to arbitrary pressure-indication means in the claim 1 to 6, it is characterized in that signalling apparatus (14) can provide two kinds of differentiable signals at least.
8. according to the pressure-indication means of claim 7, it is characterized in that signalling apparatus is mechanical.
9. according to the pressure-indication means of claim 8, it is characterized in that signalling apparatus is to be mounted to rotating ball (14), it has two chromatic zoneses at least.
10. according to the pressure-indication means of arbitrary of claim 1 to 9, it is characterized in that indicating device is an intuitive indicators, its indicating status can arrive with at least 110 view of spending from the outside of device.
11. the pressure-indication means according to arbitrary of claim 1 to 10 is characterized in that, connecting device is a mechanical linkage.
12. pressure-indication means according to claim 11, it is characterized in that, connecting device comprises the structure of piston (10), elongate articles (12) and crank device (20), wherein, piston (10) is mounted to facing to film (7), crank device (20) is connected with signalling apparatus (14), and elongate articles (12) extends between piston (10) and crank device (20).
13. the pressure-indication means according to claim 12 is characterized in that, piston (10) by spring (13) press inclined to one side must be towards film.
14. require arbitrary pressure-indication means according to aforesaid right, it is characterized in that film (7) makes an insurance barrier film (18), perhaps comprise an insurance barrier film (18).
15. the pressure-indication means according to claim 14 is characterized in that, insurance barrier film (18) is designed to: if in film (7) one sides away from cavity (8), when applied pressure surpasses the twice of cavity pressure, then break.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96180288A CN1074729C (en) | 1996-05-07 | 1996-05-07 | Pressure indicating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96180288A CN1074729C (en) | 1996-05-07 | 1996-05-07 | Pressure indicating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1217689A CN1217689A (en) | 1999-05-26 |
| CN1074729C true CN1074729C (en) | 2001-11-14 |
Family
ID=5127785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96180288A Expired - Fee Related CN1074729C (en) | 1996-05-07 | 1996-05-07 | Pressure indicating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1074729C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439134C (en) * | 2001-12-19 | 2008-12-03 | 普利司通自行车有限公司 | Internal pressure informing device for tire and rim and tire assembly using the same |
| CN100354151C (en) * | 2004-06-09 | 2007-12-12 | 黄腾文 | Tyre pressure alarm |
| EP2720022B1 (en) * | 2012-10-12 | 2018-03-07 | Magna Steyr Fahrzeugtechnik AG & Co KG | Pressure indicator for high pressure storage facilities |
| CN107080863A (en) * | 2017-04-25 | 2017-08-22 | 上海契斯特医疗科技公司 | A kind of negative pressure display device and negative pressure drainage device |
| CN107883032B (en) * | 2017-11-06 | 2024-08-09 | 肇庆市大旺大庆炉具制品企业有限公司 | Pressure reducing valve operating condition display device and pressure reducing valve |
| CN110657915B (en) * | 2017-12-25 | 2021-01-19 | 李明渊 | Fire extinguisher pressure indicating liquid anti-mixing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2689481A (en) * | 1952-04-24 | 1954-09-21 | Gerald M Quiat | Tire pressure indicator |
| US3693691A (en) * | 1970-11-23 | 1972-09-26 | Ametek Inc | Pressure relief device |
| US4476803A (en) * | 1983-06-03 | 1984-10-16 | Dual Dynamics, Inc. | Apparatus for indicating tire pressure |
-
1996
- 1996-05-07 CN CN96180288A patent/CN1074729C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2689481A (en) * | 1952-04-24 | 1954-09-21 | Gerald M Quiat | Tire pressure indicator |
| US3693691A (en) * | 1970-11-23 | 1972-09-26 | Ametek Inc | Pressure relief device |
| US4476803A (en) * | 1983-06-03 | 1984-10-16 | Dual Dynamics, Inc. | Apparatus for indicating tire pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1217689A (en) | 1999-05-26 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20011114 Termination date: 20130507 |