CN104350311A

CN104350311A - Can tap

Info

Publication number: CN104350311A
Application number: CN201380030944.7A
Authority: CN
Inventors: M.E.科班
Original assignee: EI Du Pont de Nemours and Co
Current assignee: Chemours Co FC LLC
Priority date: 2012-04-12
Filing date: 2013-04-12
Publication date: 2015-02-11
Also published as: WO2013155434A1; US20150108176A1; JP6250633B2; JP2015520339A

Abstract

Disclosed is a can tap for dispensing fluids from containers. The can tap has a housing with a housing inlet and a housing outlet, a pin and a tap outlet. The pin has a flow portion in fluid communication with the housing inlet and housing outlet. The flow portion of the pin may be a hollow shaft. The pin has a blunt depressor capable of operating a valve on the container. The can tap may have a gasket comprising a material having a hardness that prevents deformation of the container.

Description

Tank tap

Background technique.

Technical field

The present invention relates to the tank tap used together with the container for dispensing materials.More specifically, the present invention relates to for the tank tap from pressurizing vessel assignment system cryogen.

Association area describes

Chloro-fluoro-hydrocarbons (CFC), HCFC (HCFC), hydrogen fluorohydrocarbon (HFC) and HF hydrocarbon (HFO) compound have been widely used as refrigeration agent and propellant agent and cleaning solvent.In response to the concern to global warming and ozone depletion, the technician of refrigeration agent industry subjects new external pressure just constantly.Refrigeration and air-conditioning (a/c) system usually lose refrigeration agent due to the system failure, maintenance and/or normal system leakage.Therefore, refrigeration and a/c system need to recharge by adding refrigeration agent.On motor vehicle fittings market, the very common way cryogen vessel of the pressurization of little (usual 12oz. or 1kg) recharges a/c system.Little pressurizing vessel, usually for the component market of activity, because they have portability and can be taken to vehicle and recharge described vehicle, is even filled by do-it-yourself machinery.

Cryogen vessel on little component market is provided as single-use type container usually.These containers have thin metal Sealing usually, and described Sealing is destroyed when refrigerant release.The tank tap (it can be described as " puncture tap ") with aciculiform pin punctures described thin metal Sealing allow content to be allocated out.An example of this puncture tap used together with this type of tank is shown in Figure 6.Puncture tap 600 has pin 620, and described pin has the aciculiform top 626 of the metal seal of puncture tank.An example with the tank of the thin metal Sealing that can puncture with puncture tap is shown in Figure 7.

These tanks in the market and tank tap have some shortcomings.Must be punctured due to the thin metal Sealing on tank and finally be destroyed with dispense contents, therefore tank can not be re-sealed.Therefore, these tanks only can use once before they go out of use.If be not finished all the elements thing, then unnecessary refrigeration agent is wasted.Not only unnecessary refrigeration agent means the loss of money, and unnecessary refrigeration agent is generally released in atmosphere environment, and this may have adverse effect to environment.

Another problem that penetration type tank tap (puncture tap) usually runs into is flowing that is inconsistent and/or that stop.If aciculiform pin is inserted in tank too far away, then needle pin will stop content pouring vessel.If pin inserts far away not, then the hole in metal seal may less thus limiting material pouring vessel.In typical use, pin must insert and be pulled out completely subsequently to realize best flowing.But when technician activates tank tap (such as starting by rotating shank) and starts to take out pin from tank, refrigeration agent starts flowing usually, and therefore technician may not throw off pin completely.Searching optimal flow or " optimum position " need operation selfsealings tank (that is, having the Sealing that can reseal himself), and they have been introduced on motor vehicle fittings market recently.There is the selfsealings tank of two profiles formula.These comprise external springs and activate plug type selfsealings tank and contained spring actuating plug type selfsealings tank (they can be called outside connector tank and inner connector tank).

Outside connector tank is known, and there is many taps and/or leading assembly parts, and they are used for discharging the product in outside connector tank.An example of outside connector tank is shown in Figure 8.

It is a kind of newer design that contained spring activates plug type selfsealings tank.An example of inner connector tank is shown in Figure 9.Current, there is not the tank tap in order to work together with this new inside connector tank be specifically designed.Sealing on these tanks has spring-actuated connector, and described connector remains on sealing station, until connector is depressed.Compared with outside connector tank, inner connector tank has some advantages.Thus inner connector design is more firmly not too easy to impaired, because plug section is included in tank instead of outside tank.Inner connector tank design also comparable outside connector tank has general higher flow.

Current available puncture tank tap can be used for discharging the content of inner connector tank, but has some shortcomings.The first, aciculiform pin may damage connector and/or Sealing and may destroy the ability of tank refrigerant release.The second, puncture tank tap also provides the inconsistent flow being similar to the design of previous tank.3rd, depend on the structural material of aciculiform pin, some pins even sufficiently can not activate connector with refrigerant release by dead spring.

Therefore, expect to develop a kind of one or more system overcome in the shortcoming of current enabled production.

Expect to provide a kind of firm tank that can reseal and faucet system.Tank and the faucet system with firm resealable allow less material to be wasted by allowing the entire content of tank to be all used to specify purposes.Less waste also can cause lower cost and less environmetal impact.

Also may expect to provide a kind of system being easier to use and/or can produce more consistent effect.Such as, expect to provide a kind of following system, it provides high flow capacity and/or consistent flow and does not need to find " optimum position " of pin.

Summary of the invention

In at least one embodiment of the present disclosure, tank tap comprises:

Shell, described shell comprises main body, has the lower end of entrance, has the upper end of outlet, throat between described lower end and described upper end;

Be positioned at the pin of described shell, described pin has the upper end being fixed to described housing main body, flowing part between the lower end with blunt nosed pressing device and the top and bottom of the described pin in described shell throat, described blunt nosed pressing device is applicable to contact the tank having and wherein locate valvular top, wherein said blunt nosed pressing device can operate the valve of described tank, and wherein said flowing part is communicated with described housing outlet fluid with described housing entry; With

At the faucet spout that the upper end of described shell is communicated with described housing outlet fluid.

According at least one embodiment of the present disclosure, tank tap comprises:

Be positioned at the pin of described shell, described pin has the upper end being fixed to described housing main body, flowing part between the lower end with blunt nosed pressing device and the top and bottom of the described pin in described shell throat, described blunt nosed pressing device is applicable to contact the tank having and wherein locate valvular top, wherein said blunt nosed pressing device can operate the valve of described tank, and wherein said flowing part is communicated with described housing outlet fluid with described housing entry;

The faucet spout that is communicated with described housing outlet fluid of end place on the housing; With

Be adjacent to described shell at described housing entry or the packing ring near described housing entry location,

Wherein said packing ring comprises the material of the hardness had within the scope of about 70 durometer hardnesses to about 100 durometer hardnesses.

More than only for illustrative and explanatory purposes instead of limit the invention, the present invention is limited by the appended claims for summary and following embodiment.

Accompanying drawing explanation

Fig. 1 shows the part sectioned view of tank tap as disclosed herein.

Fig. 2 show according to an embodiment of the present disclosure be attached to tank and be in the part sectioned view of the tank tap of closed state.

Fig. 3 show according to an embodiment of the present disclosure be attached to tank and be in the part sectioned view of the tank tap of open mode.

Fig. 4 shows the sectional drawing of the tank tap pin according to an embodiment of the present disclosure.

Fig. 5 shows the sectional drawing of the tank tap pin according to an embodiment of the present disclosure.

Fig. 6 shows the part sectioned view of the existing tank tap of prior art.

Fig. 7 shows the tank of the metal seal with prior art.

The external springs that Fig. 8 shows prior art activates connector selfsealings tank.

The contained spring that Fig. 9 shows prior art activates connector selfsealings tank.

Embodiment

Before the following embodiment's details of proposition, first define or illustrate some terms.

As used herein, term " tank ", " container ", " vessel ", " bottle " and their modification are used interchangeably the implements described for keeping fluid.In at least some embodiments, fluid contents can be pressurization.In order to use together with tank tap disclosed herein, tank has wherein locates valvular top, and wherein tank can be attached to suitable tank tap.Valve can be self sealing valve and can have closedown or sealing station and open position.

As used herein, term " tap " or " tank tap " refer to can open container and from the mechanical device of wherein dispense contents.

As used herein, term " pin " refer to tap as lower part, described part produces opening in a reservoir, and content flows through tap by described opening from container.Term " pressing device " be stylus pin as lower part, when tap in use, the Sealing of described part press tank.Phrase " can operate the valve of tank " and refer to when tap is attached to tank, pressing device (upon start up) can such as rotate shank open and close valve by activating (movement) pin, make when pin sufficiently declines, valve fades to open position from closed position.Closed position is the wherein position that is not assigned with of fluid, and open position is the wherein fluid position that can be assigned with.

As used herein, term " blunt nosed " refers to and lacks most advanced and sophisticated surface, wherein most advanced and sophisticated for being defined as the end points of the angle being less than 90 degree.

In the various figures, identical structure uses identical numeral to identify, and similar structure can identify by similar numeral.

According at least one embodiment of the present disclosure, described tank tap comprises shell, has the pin of pressing device and packing ring, and wherein said packing ring comprises the elastic material of the hardness with the distortion minimizing tank.

In at least one embodiment, described pin has the flowing part allowing fluid to flow between described shell and described pin.

In at least one embodiment, described bearing pin and described flowing part are columniform, and the diameter of described flowing part can be less than the diameter of bearing pin.

According at least one embodiment of the present disclosure, described tank tap can comprise shell and pin, and wherein said pin comprises the blunt nosed pressing device of flowing part and pin end.Described shell comprises the lower end with entrance and the upper end with outlet.When in open position, the flowing part of described pin is communicated with described housing outlet fluid with described housing entry.Described pressing device can operate the valve of tank.

In an embodiment of the present disclosure, described tank tap can be attached to and depart from tank and not make tank be out of shape at least about 5 times.In certain embodiments, described tank tap can be attached to and depart from tank and not make tank be out of shape, such as, more than about 10 times more than about 5 times.

In an embodiment of the present disclosure, described tank tap uses together with the tank comprising fluid, and when described tank has 662kPa(96psia) starting pressure time, the leading fluid can sending the constant flow rate at least about 2.0g/sec of described tank.In another embodiment, when described tank has 662kPa(96psia) starting pressure time, described tank tap can send the fluid at least about 3.0g/sec or the constant flow rate at least about 5.0g/sec.

In at least one embodiment, the flow portion of described pin is divided into quill shaft or has quill shaft, described quill shaft has one or more opening, such as, side along described pin has opening in the lower end of the described pin of contiguous or close described pressing device, described quill shaft is communicated with described housing outlet fluid with described housing entry, flows into and flow out quill shaft to allow fluid.

Described quill shaft can have one or more opening along described axle in the position away from pressing device, described opening such as can be close to described housing outlet, flow into allow fluid and the quill shaft flowing out described pin to shell and housing outlet and subsequently through faucet spout.

Described pin can have solid pressing device or terminate in solid pressing device, and described solid pressing device can the connector of contact tank Sealing.The tank of the salable valve sealing in case fluid is overflowed be positioned in tank of Sealing/connector.

Described pin has in the embodiment of quill shaft wherein, and described pin can terminate in open pressing device, make described pressing device be annular and fluid flow in the quill shaft be communicated with housing entry fluid through the center of described pressing device.

Described pin, namely for the hollow bearing pin that this embodiment is described pin, terminate in open pressing device, described open pressing device has the annular cross section of the opening forming described pin, described opening is communicated with described housing entry fluid, and is wherein communicated with described housing outlet fluid away from the opening of described pressing device.

In one embodiment, described tank tap has the pin terminated in solid pressing device, and described pin is communicated with described housing entry fluid by the one or more opening in pin, described one or more opening is adjacent to the pressing device be positioned on the side of pin and is positioned in quill shaft, and is wherein communicated with described housing outlet fluid away from the opening in the flowing part of described pressing device.

As one of ordinary skill in the art will recognize like that, the flowing part of pin can have any geometrical shape allowing fluid to flow between tank and faucet spout.Those of ordinary skill in the art also will recognize, can design described geometrical shape to provide the flow of expectation.Such as, when the flow portion of described pin is divided into quill shaft, larger flowing part can provide larger flow, or less flowing part can be desired to cause lower flow, although this depends on other factors, and the such as relative size of such as shell throat.

Similarly, those of ordinary skill in the art also will recognize, the geometrical shape that can design flowing part makes it promote certain specific fluid behavior, and such as by using guide plate or protuberance, described guide plate or protuberance result through more turbulent flows fluid-mixing to a greater degree.

According to the disclosure, described pressing device has certain shape and makes it can open tank (such as, open the self sealing valve on tank thus open tank).Pressing device can be designed and damage tank or valve to minimize and/or to prevent.Such as, pressing device can have the part of relatively flat, and described part contact valve is with dispense pressure equably.As one of ordinary skill in the art will recognize like that, pressing device should be designed such that it opens tank, namely opens valve such as self sealing valve, also allows fluid to discharge from tank simultaneously.

Pressing device of the present disclosure can have the blunt surface of the valve of contact tank.Blunt surface can be smooth, bending, faceted or blunt point (that is, having the angle being greater than 90 degree on top).Pressing device can have bending or straight sidepiece.Pressing device also can have an edge that is bevelled or sphering.

In at least one embodiment, described pressing device can have spherical shape.

According at least one embodiment of the present disclosure, described pin also can have the structure that the flowing part along pin is located, and to be engaged the structure that the time limit makes and sells the distance that can decline at described pin, that is, sells limiter.Described leading shell can have the stop member engaged by described pin limiter.Such as, described pin limiter can have the shoulder engaging described stop member.Described stop member can along shell throat at housing entry or near housing entry location.Described stop member can be such as housing entry or near housing entry from described shell annular projection outwardly.The size with the pin limiter of at least one shoulder and stop member can be set to the distance that at least one shoulder contact stop member can be declined with banking pin.Pin limiter can be positioned between described pin and described shell and provide best opening.

Tap of the present disclosure also can comprise packing ring, and wherein said packing ring is adjacent to described shell or at described housing entry or near described housing entry location, and be positioned to can when described tap is attached to tank contact tank.Described packing ring can provide Sealing between tank and tap.In addition, described packing ring also can be used to minimize or prevent tank from deforming when tap is placed on tank.

Described packing ring can comprise the elastic material (such as, elastomer) of available buffer tank top.Thus too soft material can too easily compress provides protection to tank hardly.Thus too hard material can not sufficiently compress similarly will provide protection to tank hardly.Packing ring can comprise following material, when tank tap is placed on tank, described material at least in part but not fully compression.Compression can be such as at least about 1%, 5%, 10%, 20%, 30%, or 50%, or larger, but be less than 100%, such as, compression can be less than about 90%, and 75%, 60%.

The example that can be used for the material of packing ring can comprise ABS, acetal, epoxy resin, fluorocarbons, PTFE, ETFE, PVDF, ionomer, polyamide 6/6 nylon, poly-aryl compound, polycarbonate (PC), polyester, PBT, PET, Polyetherimide, polyethylene, PPO＝ polyphenylene oxide, polyphenylene sulfide, polypropylene, polystyrene, polysulfones, PVC＝polyvinyl chloride, Buna N, Hypalon 48 and Thiokol FA.

Packing ring can comprise the material of the hardness had within the scope of about 70 durometer hardnesses to about 100 durometer hardnesses.In at least one embodiment, packing ring comprises the material of the hardness had within the scope of about 80 durometer hardnesses to about 90 durometer hardnesses.Packing ring can be selected from the material with following hardness, and when tap coordinates with tank, described material compresses at least in part, but not exclusively compresses.

Can carry out the size of adjusting washer (disk) based on material used, make when tap is attached to tank, tap does not make tank be out of shape yet.

Tap can comprise any known material, and described material can bear the pressure of tank and tolerate the fluid be included in tank.Material can comprise such as stainless steel, galvanized steel, aluminium, brass, bronze, plastics etc.Pressure in these tanks can be at least 662kPa(96psia), such as at least 689kPa(100psia), at least 758kPa(110psia) and, at least 827kPa(120psia), or higher.In at least one embodiment, the material forming tap should be enough firm in bear this type of pressure to as many as at least 1.38MPa(200psia).

A kind of exemplary tank tap is shown in Figure 1.In Fig. 1 and follow-up each figure, show in section described shell to expose the pin be included in described shell.Tank tap 100 comprises shell 110, packing ring 114, pin 120 and faucet spout 130.Shell 100 has housing main body 111 and nut 112, and pin 120 is fixed to housing main body 111 by described nut.Shell 110 also has throat 113, and described throat is communicated with housing outlet 116 fluid.Screw thread 115 can engage tank (not shown) ordinatedly, and described tank can have the screw thread conformed to the screw thread of packing ring 114.

Pin 120 has shank 121, and described shank can be rotated to promote or put down bearing pin 122, and described bearing pin is by screw thread 123 splice closure 110.Fluid-tight joint between shell 110 and pin 120 is by being arranged on two packing rings 128 on axle 122 and O shape ring 127 keeps.Pin 120 also has flowing part 125, and described flow portion is divided into the hollow space of axle 122.Pin 120 end is connected in pressing device 126.

Opening 131 is adjacent to pressing device 126 and is positioned in axle 122 to allow fluid to enter into axle 122.Thus fluid can be discharged by the opening 132 of axle 122, and described opening is away from pressing device 126 and be communicated with housing outlet 116 fluid.

Tank tap 100 comprises faucet spout 130, and described faucet spout can hold flexible pipe or other connector with from tank carrying fluid by threaded part 134.

Fig. 2 shows the tank tap 100 of Fig. 1, and it is attached to tank 240 and joins the self sealing valve 250 of tank 240 to.Self sealing valve 250 is illustrated and is in closedown or sealing station, that is, valve 250 is not activated by tap 100.Tank top 241 has threaded part 242, the screw thread 115 of described threaded part splice closure 110.The bossed hat 244 of top 243 tool of tank 240, the hat of described protuberance has opening, and the pressing device 126 of pin 120 can pass described opening.The top of O shape ring 251 sealed valve 250, and connector 254 presses O shape ring 251 to prevent the fluid effusion tank 240 when can't help tank tap 100 joint by means of spring 256.In the illustrated example shown in fig. 2, connector 254 has stop member 255, and described stop member is the annular protrusion of the lifting of contact O shape ring 251.Valve body 252 has opening 253, and when connector 254 is depressed, fluid can pass described opening.

Shank 121, bearing pin 122, faucet spout 130, opening 131 and opening 132 with discuss about Fig. 1 identical.

Fig. 3 shows the tank tap 100 of Fig. 1 and Fig. 2, but forms contrast with Fig. 2, and self sealing valve 250 is illustrated in an open position, and wherein the shank 121 of pin 120 is rotated to make pin 120 to decline.Pressing device 126 is engaged by Compress Spring 256 and depresses connector 254.The pressure of connector 254 makes stop member 255 and O shape ring 251 depart from, thus allows fluid pass valve 250 from tank 240 and enter into tap 100.The flowing part 125 of pin 120 allows fluid to enter into the throat 113 of shell 110, and fluid is discharged by faucet spout 130 subsequently.

Opening 253 in the opening 131 of housing outlet 116, bearing pin 122, the opening 132 of bearing pin 122, valve body 252, valve body 252 and spring 256 with discuss about Fig. 1 and/or Fig. 2 identical.

Fig. 4 and Fig. 5 shows the alternative embodiment according to pin of the present disclosure.Fig. 4 shows the sectional drawing of pin 420, and it has hollow flowing part 425 in axle 422, and described axle head is connected in solid pressing device 426.Opening 431 is adjacent to pressing device 426 and is positioned in quill shaft 422 to allow fluid to enter into hollow flowing part 425.Fluid is discharged by opening 432, and described opening is away from pressing device 426 and be communicated with housing outlet (not shown) fluid.

Fig. 5 shows the sectional drawing of pin 520, and it has hollow flowing part 525 in axle 522, and described axle head is connected on to be had in the open pressing device 526 of annular cross section.Fluid enters into hollow flowing part 525 being discharged by opening 532 by pressing device 526, and described opening is away from pressing device 526 and be communicated with housing outlet (not shown) fluid.

Those of ordinary skill in the art will recognize that, the geometrical shape of flowing part can comprise any known geometrical shape and be not limited to cylinder form as shown in drawings.Can use other shape, this depends on the geometrical shape of desired fluid flow, leading shell and/or valve, the machine being used for manufacturing pin and/or method etc.

According to various embodiment of the present disclosure, pressing device can have the shape of any number.In at least one embodiment, pressing device can be formed as the top making it avoid damaging tank or valve.Such as, pressing device can be formed as the hat of the protuberance making it not on contact tank top, such as, as shown in Figure 2.In addition, pressing device also can be formed as make it when pressing device is dropped through valve or when pressing device rises through valve (when removing) clean seal valve top part O shape ring and do not damage O shape ring.The top (such as, O shape ring) damaging tank or valve can cause the premature failure of valve and causes tank to permeate or stop tap to open valve.

Fig. 6-9 be prior art and be illustration mentioned above.

Be described above many aspects and embodiment, and be only illustrative rather than restrictive.After reading this specification, technician it should be understood that without departing from the present invention, and other aspects and embodiment are also possible.

By reading previous embodiment and claim, one or more the further feature in embodiment and beneficial effect will become apparent.

It should be noted, above general describe described in behavior not all be all required, a part of concrete behavior is optional, and except described those, also can implement other behavior one or more.In addition, the order of listed behavior needs not to be the order that they are implemented.

In the above specification, different concepts is described with reference to specific embodiment.But those of ordinary skill in the art recognizes and can make multiple amendment and modification when not departing from the scope of the invention shown in following claim.Therefore, specification and accompanying drawing should be considered to exemplary and nonrestrictive, and this type of modification all are all intended to be included in scope of the present invention.

Below the solution of beneficial effect, other advantage and problem is described for specific embodiment.But, the solution of beneficial effect, advantage, problem and any beneficial effect, advantage or solution can be caused to produce or become any one or more features more significant and may not be interpreted as the key of any or all claim, required or essential characteristic.

Will be appreciated that, for clarity sake, some feature described in context of different embodiment also can provide in a joint manner in single embodiment herein.Otherwise for simplicity's sake, the various features described in the context of single embodiment also can provide separately or with any sub-portfolio.In addition, the correlation values proposed in scope comprises each value in described scope.

Claims

1. tank tap, comprising:

2. tank tap according to claim 1, the flow portion of wherein said pin is divided into quill shaft, and wherein said quill shaft has the one or more openings be communicated with described housing outlet fluid with described housing entry.

3. tank tap according to claim 2, wherein said quill shaft terminates in open pressing device, described open pressing device has the annular cross section of the opening forming described pin, described opening is communicated with described housing entry fluid, and at least one in wherein said one or more opening is communicated with described housing outlet fluid.

4. tank tap according to claim 2, described pin terminates in solid pressing device, and at least one in the described one or more opening in the quill shaft of described pin is located along the side of described pin at contiguous or near the described pin of described pressing device lower end, be communicated with described housing entry fluid, and be wherein communicated with described housing outlet fluid away from the opening in the described flowing part of described pressing device.

5. tank according to claim 1 tap, wherein said pin has the pin limiter that the flowing part along described pin locate, and described pin limiter is for being engaged at described pin the distance that described in limit, pin can decline.

6. tank tap according to claim 5, wherein said pin limiter is at least one shoulder, and described shell also comprises along described shell throat at described housing entry or the stop member near described housing entry location, the size of at least one shoulder wherein said and described stop member is set to and makes stop member described at least one shoulder contact described to be engaged the distance that described in limit, pin can decline at described pin.

7. tank tap according to claim 1, also comprises and is adjacent to described shell at described housing entry or the packing ring near described housing entry location.

8. tank tap according to claim 7, wherein said packing ring comprises elastic material, and described elastic material has the hardness of the distortion of the tank minimized attached by described tank tap.

9. tank tap according to claim 8, wherein said packing ring has the hardness within the scope of about 70 durometer hardnesses to about 100 durometer hardnesses.

10. tank tap according to claim 9, wherein said packing ring has the hardness within the scope of about 80 durometer hardnesses to about 90 durometer hardnesses.

11. tanks according to claim 7 taps, the size of wherein said packing ring is set to and makes it when described tank tap is attached to tank at least in part but not fully compression.

12. tank taps according to claim 1, wherein said tank tap can be attached to and depart from tank and not make described tank be out of shape at least about 5 times.

13. tanks according to claim 1 taps, wherein when described tank has 662kPa(96psia) starting pressure time, described tank tap can send the constant flow rate of at least 2.0g/sec.

14. tank taps according to claim 1, wherein said pressing device has the blunt surface of the valve for contact tank.

15. tank taps according to claim 19, the blunt surface of wherein said pressing device is smooth, bending, faceted or blunt point.

16. tank taps according to claim 1, wherein said pressing device has the blunt surface of the valve for contact tank.

17. tank taps according to claim 16, the blunt surface of wherein said pressing device is smooth, bending, faceted or blunt point.

18. according to claim 16 or 17 tank tap, wherein said pressing device has straight sidepiece.

19. according to claim 16 or 17 tank tap, wherein said pressing device has bending sidepiece.

20. tank taps, comprising:

At the faucet spout that the upper end of described shell is communicated with described housing outlet fluid; With

21. tank taps according to claim 20, the flow portion of wherein said pin is divided into quill shaft, and described quill shaft has the opening be communicated with described housing outlet fluid with described housing entry.

22. tank taps according to claim 21, wherein said quill shaft terminates in open pressing device, described open pressing device has the annular cross section of the opening forming described pin, described opening is communicated with described housing entry fluid, and is wherein communicated with described housing outlet fluid away from the opening of described pressing device.

23. tank taps according to claim 21, wherein said pin terminates in solid pressing device, and described pin is communicated with described housing entry fluid by the one or more opening in described pin, described pin be adjacent to be positioned at described pin side on described pressing device be positioned in described quill shaft, and to be wherein communicated with described housing outlet fluid away from the opening in the described flowing part of described pressing device.

24. tanks according to claim 20 taps, wherein said pin has the pin limiter that the flowing part along described pin locate, and described pin limiter is for being engaged at described pin the distance that described in limit, pin can decline.

25. tank taps according to claim 24, wherein said limiter has at least one shoulder, and described shell comprises along described shell throat at described housing entry or the stop member near described housing entry location, and the size of at least one shoulder wherein said and described stop member is set to and makes the distance that described at least one shoulder contact described, stop member can decline to limit described pin.

26. tank taps according to claim 20, wherein said packing ring comprises the material of the hardness had within the scope of about 80 durometer hardnesses to about 90 durometer hardnesses.