CN102840121B - There is the combination pressure switch of manually-operated gate - Google Patents
There is the combination pressure switch of manually-operated gate Download PDFInfo
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- CN102840121B CN102840121B CN201210213869.5A CN201210213869A CN102840121B CN 102840121 B CN102840121 B CN 102840121B CN 201210213869 A CN201210213869 A CN 201210213869A CN 102840121 B CN102840121 B CN 102840121B
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Abstract
A kind of combination pressure switch, comprise pressure switch and hand switch, this pressure switch can fluid-responsive working pressure and move between off position and operating position, described pressure switch comprises contact assembly, this contact assembly has the first terminal and the second terminal that are electrically connected by current carrying element moveable by means of pressure switch, and described hand switch is configured to current carrying element is moved independent of the movement of pressure switch.
Description
The cross reference of related application
The part continuation application of the U.S. at first patent application No.12/173834 that this application is submission on July 16th, 2008, denomination of invention is " combination pressure switch ".
Technical field
The invention provides a kind of valve for air compressing and fluidic manipulation systems and controller.
Background technique
Fluid handling system such as air compressor typically utilizes the mechanically driven pump of normally positive displacement.Usually, pump is connected to storage tank or manifold.The air of working volume is deposited in tank storage, and this air serves as buffer and makes pump need not continuous running.On the contrary, pump only runs to tank by pressurising to expecting pressure, and then close until pressure be depleted to can under use level.Pump circulation is controlled by pressure sensitive switch.Such system also comprises " off-load " valve usually, the pressure of this valve effectively on emptying pump pressure head when pump does not operate.This feature substantially reduces in order to the effort of restarting needed for pump that circulates next time.In addition, the system of prior art has discrete manual ON/cut-off switch, which increases complexity and cost.The system of prior art typically utilizes unloading valve, pressure switch and manual ON/cut-off switch as discrete parts, which increases complexity and cost.
Summary of the invention
In one embodiment, the invention provides a kind of combination pressure switch, comprise: pressure switch and hand switch, described pressure switch can move between off position and operating position in response to the working pressure of fluid, described pressure switch comprises contact assembly, this contact assembly comprises the first terminal, second terminal and can the current carrying element of movement between open configuration and closed configuration, described open configuration makes the first terminal and the second terminal disconnect electrical connection, described closed configuration makes the first terminal and the electrical connection of the second terminal, wherein, current carrying element moves to open configuration by making pressure switch move to its off position in response to the working pressure of fluid from closed configuration, described hand switch is configured to current carrying element is moved in response to the movement of the working pressure of fluid independent of pressure switch between its open configuration and closed configuration.
On the other hand, combination pressure switch comprises unloading valve alternatively, and this unloading valve one of at least can be moved between the closed position and the open position by the movement of pressure switch in response to the movement of the working pressure of fluid and hand switch.
On the other hand, pressure switch and unloading valve misalignment vertically in combination pressure switch.
On the other hand, the movement of unloading valve is associated with the mechanically moving of pressure switch by lever.
On the other hand, the combination pressure switch drainage entrance that also comprises shell, the pressure entrance be communicated with pressure switch fluid and be communicated with unloading valve fluid.
On the other hand, unloading valve comprises can at the piston being formed in movement in the vestibule in main body, Returnning spring and the relief outlet be formed in main body, described piston has valve pin and limits the enlarged-diameter core in the face be seated against on valve seat, described valve pin has top and bottom, described Returnning spring is arranged in above piston in vestibule, along the direction driven plunger of valve seat, described relief outlet traverses vestibule and forms drainage entrance when unloading valve is in its open position and is connected with the fluid between external environment condition.
On the other hand, pressure switch comprises plate-like separator, chamber is divided into upper and lower by this plate-like separator, and the contact assembly be included in top and the operating panel in bottom, this operating panel operates in response to the pressure reduction between the pressure in barometric pressure and pressure entrance.
On the other hand, pressure switch comprises actuator pin, described actuator pin extends through the opening in separator, and move up into and contact with current carrying element in the off position of pressure switch, and move down into and contact with operating panel so that current carrying element makes the first terminal and the second terminal be electrically connected in the operating position of pressure switch.
On the other hand, hand switch is knob, described knob is configured to apply rotary motion to camshaft, described camshaft has blade, described blade is arranged to make current carrying element described in described blade contact as the cam shaft rotates and described current carrying element is moved, thus makes described the first terminal and described second terminal disconnect electrical connection.
According to another embodiment, a kind of combination pressure switch is provided, described combination pressure switch comprises pressure switch, load releasing valve and hand switch, described pressure switch can fluid-responsive working pressure and move between off position and operating position, described pressure switch comprises contact assembly, this contact assembly comprises the first terminal, second terminal and can the current carrying element of movement between open configuration and closed configuration, described open configuration makes the first terminal and the second terminal disconnect electrical connection, described closed configuration makes the first terminal and the electrical connection of the second terminal, wherein, described current carrying element moves to described open configuration by making pressure switch move to its off position in response to the working pressure of fluid from described closed configuration, described unloading valve can be moved in response to the movement of the working pressure of fluid between the closed position and the open position by pressure switch, described hand switch is configured to make current carrying element move independent of pressure switch between its open configuration and closed configuration in response to the movement of the working pressure of fluid and make described unloading valve move to its open position from its closed position.
Accompanying drawing explanation
The present invention is appreciated that by reference to the following description carried out by reference to the accompanying drawings, wherein:
Fig. 1 is the perspective view of the first embodiment of combination pressure switch;
Fig. 2 is another perspective view of the integral switch of Fig. 1;
Fig. 3 is the perspective exploded view of the integral switch of Fig. 1;
Fig. 4 is the perspective exploded view of the integral switch of Fig. 1;
Fig. 5 is the cross sectional view of the integral switch of Fig. 1;
Fig. 6 is the perspective exploded view of the integral switch of Fig. 1;
Fig. 7 looks sectional view in the end of the integral switch of Fig. 1, wherein closing of circuit;
Fig. 8 looks sectional view in the end of the integral switch of Fig. 1, and wherein circuit disconnects;
Fig. 9 is the schematic diagram of the pumping system of the integral switch comprising Fig. 1;
Figure 10 is the perspective view of the air compressor of the integral switch comprising Fig. 1;
Figure 11 is the perspective view of the second embodiment of combination pressure switch;
Figure 12 is the perspective view of the integral switch of Figure 11;
Figure 13 is the plan view from above of the integral switch of 11;
Figure 14 is the cross sectional view of the integral switch of Figure 11 that 14-14 along the line intercepts;
Figure 15 is the cross-sectional perspective view of the integral switch of Figure 11;
Figure 16 is the perspective view of the integral switch of Figure 11 that inner member is shown;
Figure 17 is the perspective view of the integral switch of Figure 11 that inner member is shown;
Figure 18 is the side elevation view of the integral switch of Figure 11; And
Figure 19 is the perspective view of the integral switch of Figure 11.
Embodiment
With reference to accompanying drawing, wherein identical in each view reference character represents identical element, and Fig. 1-8 shows the first embodiment of the combination pressure switch usually indicated by reference character 10, is referred to herein as " integral switch ".Integral switch 10 has shell 12, and this shell has vertical center line or axis " A ", pressure entrance 14 and drainage entrance 16.In this example embodiment, shell 12 comprises hollow, extends main body 18, and this elongation main body is closed by independent end cap 20.Leakage between main body 18 and end cap 20 is enclosed by lower seal 22 such as O shape and is stoped.The type of shell is unimportant, and the inner member of integral switch 10 also can be contained in different structure such as manifold or combination brake switch and proporting.
Integral switch 10 comprises the unloading valve 24 with piston 26, and vestibule 28 inside that described piston 26 is being formed in main body 18 is mobile.Piston 26 has the enlarged-diameter core 32 extending valve pin 30 (this valve pin is with top and bottom) and limit face 34.Returnning spring 36 to be disposed in above piston 26 and to promote piston 26 downwards towards closed position in vestibule 28.Spring support 37 is for locating upper end and the Returnning spring 36 of valve pin 30.In a closed position, face 34 is sealed on valve seat 38, and described valve seat is formed by elastic O-ring in this example embodiment.The relief outlet 40 be formed in main body 18 traverses vestibule 28 and forms drainage entrance 16 when unloading valve 24 is in rising, open position and is connected with the fluid between external environment condition.The upper end of vestibule 28 is closed by hollow plug 42, and described hollow plug also forms drainage entrance 16.Any leakage between vestibule 28 and connector 42 is enclosed by upper Sealing 44 such as O shape and is stoped.
Pressure switch 46 is disposed in chamber 48 in main body 18, is positioned at below unloading valve 24.Chamber 48 is divided into upper and lower by plate-like separator 50.Pressure switch 46 is included in the contact assembly 52 in top and the operating panel in bottom 54.Operating panel 54 belongs to known type, and it is in response to the pressure reduction between the main pressure in atmospheric pressure and pressure entrance 14.Operating panel 54 has intrinsic preload and restoring force, and when pressure is removed, described power causes this operating panel 54 to move to operating position.Structurally, operating panel 54 can be so-called " buckle dish ", and have the frusto-conical that band flattens core, it causes this operating panel " buckle " between off position and operating position.This provide some dead bands or delayed, thus avoid " swing " in operation.Flexible, airtight barrier film 55 is trapped between separator 50 and lower seal 22, and pressure entrance 14 is separated with the inner sealing of integral switch 10.Below barrier film 55 has and to be communicated with pressure entrance 14 fluid, and above being communicated with relief outlet 40 fluid.
Contact assembly 52 comprises the first terminal 56A and the second terminal 56B that carry the first contact 58A and the second contact 58B respectively.First contact 58A is fixed and the second contact 58B is carried on removable, conduction, current carrying element one end.In the embodiment shown, current carrying element is leaf spring 60 or supporting plate.Unless applying external force, leaf spring 60 is biased to be kept together by contact 58A and 58B, that is, contact assembly 52 is " normally closed " in electricity meaning.
Actuator pin 62 extends through the opening 64 in separator 50 and freely moves up and down along axis A.Both actuator pin 62 operating of contacts dish 54 and leaf spring 60, make when operating panel 54 is in lower position, contact 58A and 58B contacts with each other, and when operating panel 54 is in upper position, contact 58A and 58B is separated, destroys the current path between terminal 56A and 56B.
The lower end of the valve pin 30 of piston 26 usually and actuator pin 62 located coaxially, and contact leaf spring 60, thus substantially between operating panel 54 and piston 26, form continuously linear mechanical path.In this arrangement, when operating panel 54 is in lower position, piston 26 is in " closing " position, and when operating panel 54 is in upper position, piston 26 is in an open position.In an alternative embodiment, gap between leaf spring 60 and actuator pin 62, can activate to provide the delay of unloading valve.
Operating handle 89 is arranged for manually operative combination switch 10 and formation manual ON/cut-off switch.Operating handle 89 is formed by the knob 90 on the mounting plate 92 be arranged on integral switch 10.Knob 90 is configured to apply rotary motion to camshaft 96.Camshaft 96 is positioned in the lower casing 94 of the bottom being installed to mounting plate 92.Camshaft 96 has a pair blade 98A and 98B of centre and the far-end being positioned at camshaft 96.Blade 98A and 98B is positioned such that when, upon rotating, and blade 98A with 98B contacts current carrying element (being leaf spring 60 in this case).As discussed previously, leaf spring 60 is for by making the electrical contact formed by electrical end 56A and 56B close across the distance between 58A and 58B of contact.When camshaft blade 98A and 98B is rotated, blade contact leaf spring 60 and leaf spring 60 is shifted until circuit disconnects and no longer includes electric current and pass through away from contact 58B.As shown in the figure, 58A is non-conventional terminal and is configured to be separated with leaf spring 60.Leaf spring 60 is shifted until valve pin 30 is touched.Leaf spring 60 applies linear motion to valve pin 30, therefore activates unloading valve 24 in mode as discussed previously.
Fig. 9 schematically shows the fluid handling system 66 utilizing integral switch 10 of the present invention.The concrete instance of such system can be used to the air compressor that pneumatic tool etc. provides power.This system generally includes the pump 68 driven by motor 70, the storage tank 72 being connected to the waste side of pump 68 by the discharge pipe line 74 comprising safety check 76 and above-mentioned integral switch 10.Power source 78 (such as primary power supply) is connected to motor 70 by the contact of pressure switch 46, and the relief outlet of pump 68 is directly connected to unloading valve 24 by drainage pipeline 80.Storage tank 72 is connected to pressure entrance 14 by the sensing pipeline 82 being connected to the downstream of safety check 76.Should be noted that Fig. 9 only not necessarily their structure for illustrating function between various parts to connect; Such as, in the air compressor of reality, motor 70 is usually connected to pump 68 with through coupling instead of shown belt.
Fluid handling system 66 can typically at atmosheric pressure to be expressed as P
tankthe pressure of tank inside start operation.P
tankpressure switch 46 is delivered to by sensing pipeline 82.Work as P
tankbe less than set point pressure (P
set) time, pressure switch 46 is closed.This also allows unloading valve 24 to close on valve seat 38 under the pressure from Returnning spring 36.
Under this condition, therefore motor 70, by operating pumps 68, to be exhausted air in storage tank 72 by discharge pipe line and safety check 76, and makes pressure P
tankincrease.Work as P
tankreach P
settime, pressure switch 46 will be snapped into off position and motor 70 is stopped.Actuator pin 62 drives unloading valve 24 to open as mentioned above.Any air pressure in the discharge pipe line 74 of the upstream of safety check 76 and pump 68 is allowed to flow out to air along by drainage pipeline 80, unloading valve 24 and the path that eventually passes relief outlet 40.This alleviates all pressure on pump 68.Safety check 76 keeps pressure P
tank.
As long as P
tankbe greater than P
set, unloading valve 24 and pressure switch 46 just remain open.Pressure is kept and can be discharged into such as pneumatic tool in known manner by outlet 84 in storage tank 72.Work as P
tankdrop to P
settime following, pressure switch 46 closes, and starts pump 68, and it allows unloading valve 24 to close under the pressure from Returnning spring 36.This allows pump 68 to be storage tank 72 pressurising.Pressure switch 46 typically in a known way with " dead band " or hysteretic operation to a certain degree in set point, thus avoids the too much of motor 70 and pump 68 to switch on and off circulation.Such as, the P that motor 70 circulates needed for "off" is made
setthe P that motor 70 is circulated needed for " connection " can be significantly higher than
set.
With reference to figure 11-19, overall by reference number 110 shows the second embodiment of combination pressure switch, is referred to herein as " integral switch ".Integral switch 110 has shell 12, pressure entrance 14 and drainage entrance 16.Axis " B " is placed in the middle relative to pressure entrance 14.Drainage entrance 16 and thus unloading valve 24 relative to axis " B " lateral shift, therefore, unloading valve 24 and pressure switch 46 linear alignment unlike the first embodiment.Shell 12 comprises hollow, extends main body 18, and this elongation main body is closed by independent end cap 20.Leakage between main body 18 and end cap 20 is enclosed by the routine as directed O shape of lower seal 22 and is stoped.The type of shell is unimportant, and the inner member of integral switch 110 also can be contained in different structure such as manifold or combination brake switch and proporting.
Integral switch 10 comprises the unloading valve 24 with piston 26, and vestibule 28 inside that described piston 26 is being formed in main body 18 is mobile.Piston 26 has the enlarged-diameter core 32 extending valve pin 30 (this valve pin is with top and bottom) and limit face 34.Returnning spring 36 to be disposed in above piston 26 and to promote piston 26 downwards towards closed position in vestibule 28.Spring support 37 is for locating upper end and the Returnning spring 36 of valve pin 30.In a closed position, face 34 is sealed on valve seat 38.The relief outlet 40 be formed in main body 18 traverses vestibule 28 and forms drainage entrance 16 when unloading valve 24 is in rising, open position and is connected with the fluid between external environment condition.The upper end of vestibule 28 is closed by hollow plug 42, and described hollow plug also forms drainage entrance 16.Any leakage between vestibule 28 and connector 42 is enclosed by the routine as directed O shape of upper Sealing 44 and is stoped.Unloading valve 24 is optional and can be included in switch 110 or can not be included in switch 110.
Pressure switch 46 is disposed in chamber 48 in main body 18, is positioned at below unloading valve 24.Chamber 48 is divided into upper and lower by plate-like separator 50.Pressure switch 46 is included in the contact assembly 52 in top and the operating panel in bottom 54.Operating panel 54 belongs to known type, and it operates in response to the pressure reduction between the main pressure in atmospheric pressure and pressure entrance 14.Operating panel 54 has intrinsic preload and restoring force, and when pressure is removed, described power causes this operating panel to move to operating position.Structurally, operating panel 54 can be so-called " buckle dish ", and have the frusto-conical that band flattens core, it causes this operating panel " buckle " between off position and operating position.This provide some dead bands or delayed, thus avoid " swing " in operation.Flexible, airtight barrier film 55 is trapped between separator 50 and lower seal 22, and pressure entrance 14 is separated with the inner sealing of integral switch 110.Below barrier film 55 has and to be communicated with pressure entrance 14 fluid, and above being communicated with relief outlet 40 fluid.
Contact assembly 52 comprises the first terminal 56A and the second terminal 56B that carry the first contact 58A and the second contact 58B respectively.First contact 58A is fixed and the second contact 58B is carried on removable, conduction, on current carrying element.In the embodiment shown, current carrying element is elastic leaf springs 60 or supporting plate.Unless applying external force, leaf spring 60 is biased with kept together by contact 58A and 58B (contact assembly 52 is " normally closed " in electricity meaning).
Actuator pin 62 extends through the opening 64 in separator 50 and freely moves up and down along axis " B ".Both actuator pin 62 operating of contacts dish 54 and leaf spring 60, make when operating panel 54 is in lower position, contact 58A and 58B contacts with each other, and when operating panel 54 is in upper position, contact 58A and 58B is separated, destroys the current path between terminal 56A and 56B.
Contact assembly also comprises the lever 112 around fulcrum 114 pivotable.When operating panel 54 is connected and actuator pin 52 moves up, one end of lever 112 moves up and contacts unloading valve 24 is opened with valve pin 30.Lever 112 provides the lever arm being enough to produce and making valve pin 30 be moved upwards up to the power needed for its open position.
The lower end of the valve pin 30 of piston 26 offsets vertically relative to actuator pin 62, and engagement lever 112, thus non linear mechanical path is formed between operating panel 54 and piston 26.In this arrangement, when operating panel 54 is in lower position, piston 26 is in the closed position, and when operating panel 54 is in upper position, piston 26 is in an open position.In an alternative embodiment, gap between leaf spring 60 and actuator pin 62, can activate to provide the delay of unloading valve.
Operating handle 89 is arranged for manually operative combination switch 110 and formation manual ON/cut-off switch.Therefore, integral switch 110 comprises by means of the pressure switch making contact and unloading valve 24 open and automatically cuts out and make both manual joysticks 89 that switch and unloading valve 24 are opened.Operating handle 89 is formed as the knob 90 be arranged on the side of shell 12.Knob 90 is configured to apply rotary motion to camshaft 96.Camshaft 96 has a pair blade 98A and 98B of centre and the far-end being positioned at camshaft 96.Blade 98A and 98B is positioned such that when, upon rotating, blade 98A with 98B contact leaf spring 60 or " supporting plate " and make leaf spring 60 or " supporting plate " mobile, and make switch "off".As discussed previously, leaf spring 60 is for by making the electrical contact formed by electrical end 56A and 56B close across the distance between 58A and 58B of contact.When camshaft blade 98A and 98B is rotated, blade contact leaf spring 60 and leaf spring 60 is shifted until circuit disconnects and no longer includes electric current and pass through away from contact 58B.Leaf spring 60 is shifted until lever 112 moves up and contacts valve pin 30.The lever 112 that moves to of leaf spring 60 applies pivot movement, thus applies linear motion to valve pin 30, therefore opens unloading valve 24 in mode as discussed previously.
Second embodiment of integral switch 110 can replace integral switch 10 for the fluid handling system 66 shown in Fig. 9.
Foregoing describe each embodiment of the combination pressure switch comprising manual ON/cut-off switch.Can predict, those skilled in the art can carry out various amendment to switch, and these amendments are intended to cover contained by claim.
Claims (12)
1. a combination pressure switch, this combination pressure switch comprises:
Pressure switch, this pressure switch is arranged along first axle and can be moved between off position and operating position in response to the working pressure of fluid, described pressure switch comprises contact assembly, this contact assembly comprises the first terminal, second terminal and can the current carrying element of movement between open configuration and closed configuration, described open configuration makes the first terminal and the second terminal disconnect electrical connection, described closed configuration makes the first terminal and the electrical connection of the second terminal, wherein, described current carrying element moves to described open configuration by making pressure switch move to its off position in response to the working pressure of fluid from described closed configuration,
Hand switch, described hand switch is configured to current carrying element is moved in response to the movement of the working pressure of fluid independent of described pressure switch between the open configuration and closed configuration of described current carrying element; And
Unloading valve, this unloading valve is along the second axis arranged and one of at least can be moved between the closed position and the open position by the movement of described pressure switch in response to the movement of the working pressure of fluid and hand switch; And
Wherein said first axle is parallel with described second axis and offsets vertically; And
The movement of wherein said unloading valve by lever with the mechanically moving of described pressure switch associate.
2. combination pressure switch according to claim 1, described combination pressure switch also comprises:
Shell;
The pressure entrance be communicated with described pressure switch fluid; And
The drainage entrance be communicated with described unloading valve fluid.
3. combination pressure switch according to claim 2, wherein, described unloading valve comprises:
Piston, described piston can move being formed in the vestibule in main body, and described piston has valve pin and enlarged-diameter core, and described valve pin has top and bottom, and described enlarged-diameter core limits the face be seated against on valve seat;
Returnning spring, described Returnning spring is arranged in above described piston in described vestibule, at side's upwardly described piston of described valve seat; And
Be formed in the relief outlet in described main body, described relief outlet traverses described vestibule and forms drainage entrance when described unloading valve is in its open position and is connected with the fluid between external environment condition.
4. combination pressure switch according to claim 1, wherein, described pressure switch comprises plate-like separator, chamber is divided into upper and lower by this plate-like separator, and described pressure switch is included in the contact assembly in top and the operating panel in bottom, described operating panel operates in response to the pressure reduction between the pressure in atmospheric pressure and pressure entrance.
5. combination pressure switch according to claim 1, wherein, described pressure switch comprises actuator pin, described actuator pin extends through the opening in separator, and move up into and contact with the current carrying element in the off position being in pressure switch, and move down into and contact so that current carrying element makes described the first terminal and described second terminal be electrically connected with the operating panel in the operating position being in pressure switch.
6. combination pressure switch according to claim 1, wherein, described hand switch is knob, described knob is configured to apply rotary motion to camshaft, described camshaft has blade, described blade is arranged to make current carrying element described in described blade contact as the cam shaft rotates and described current carrying element is moved, thus makes described the first terminal and described second terminal disconnect electrical connection.
7. a combination pressure switch, described combination pressure switch comprises:
Pressure switch, this pressure switch is arranged along first axle and can be moved between off position and operating position in response to the working pressure of fluid, described pressure switch comprises contact assembly, this contact assembly comprises the first terminal, second terminal and can the current carrying element of movement between open configuration and closed configuration, described open configuration makes the first terminal and the second terminal disconnect electrical connection, described closed configuration makes the first terminal and the electrical connection of the second terminal, wherein, described current carrying element moves to described open configuration by making pressure switch move to its off position in response to the working pressure of fluid from described closed configuration,
Unloading valve, described unloading valve is along the second axis arranged and moved between the closed position and the open position in response to the movement of the working pressure of fluid by pressure switch; And
Hand switch, described hand switch is configured to make current carrying element move independent of pressure switch between the open configuration and closed configuration of described current carrying element in response to the movement of the working pressure of fluid and make described unloading valve move to its open position from its operating position; And
Wherein said first axle is parallel with described second axis and offsets vertically; And
The movement of wherein said unloading valve by lever with the mechanically moving of described pressure switch associate.
8. combination pressure switch according to claim 7, described combination pressure switch also comprises:
Shell;
The pressure entrance be communicated with described pressure switch fluid; And
The drainage entrance be communicated with described unloading valve fluid.
9. combination pressure switch according to claim 8, wherein, described unloading valve comprises:
Piston, described piston can move being formed in the vestibule in main body, and described piston has valve pin and enlarged-diameter core, and described valve pin has top and bottom, and described enlarged-diameter core limits the face be seated against on valve seat;
Returnning spring, described Returnning spring is arranged in above described piston in described vestibule, at side's upwardly described piston of described valve seat; And
Be formed in the relief outlet in described main body, described relief outlet traverses described vestibule and forms drainage entrance when described unloading valve is in its open position and is connected with the fluid between external environment condition.
10. combination pressure switch according to claim 7, wherein, described pressure switch comprises plate-like separator, chamber is divided into upper and lower by this plate-like separator, and described pressure switch is included in the contact assembly in top and the operating panel in bottom, described operating panel operates in response to the pressure reduction between the pressure in atmospheric pressure and pressure entrance.
11. combination pressure switch according to claim 7, wherein, described pressure switch comprises actuator pin, described actuator pin extends through the opening in separator, and move up into and contact with the current carrying element in the off position being in pressure switch, and move down into and contact so that current carrying element makes the first terminal and the second terminal be electrically connected with the operating panel in the operating position being in pressure switch.
12. combination pressure switch according to claim 7, wherein, described hand switch is knob, described knob is configured to apply rotary motion to camshaft, described camshaft has blade, described blade is arranged to make current carrying element described in described blade contact as the cam shaft rotates and described current carrying element is moved, thus makes described the first terminal and described second terminal disconnect electrical connection.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/168,503 US8809707B2 (en) | 2008-07-16 | 2011-06-24 | Combination pressure switch with manual shutoff |
| US13/168,503 | 2011-06-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102840121A CN102840121A (en) | 2012-12-26 |
| CN102840121B true CN102840121B (en) | 2016-02-10 |
Family
ID=47367779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210213869.5A Active CN102840121B (en) | 2011-06-24 | 2012-06-25 | There is the combination pressure switch of manually-operated gate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102840121B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2120899U (en) * | 1992-05-14 | 1992-11-04 | 邱克敏 | Pressure switch for air compressor |
| CN2593346Y (en) * | 2003-01-03 | 2003-12-17 | 乐清市力夫机电有限公司 | Barometic switch for air compressor |
| CN101629566A (en) * | 2008-07-16 | 2010-01-20 | 康多尔工厂美国公司 | Combination pressure switch |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4243858A (en) * | 1979-01-19 | 1981-01-06 | Therm-O-Disc Incorporated | Snap disc operated pressure switch |
| US5530215A (en) * | 1993-11-05 | 1996-06-25 | Furnas Electric Company | Pressure switch |
| ITMI20031571A1 (en) * | 2003-07-31 | 2005-02-01 | Ennio Omati | PRESSURE SWITCH WITH ADJUSTABLE SAFETY VALVE. |
| US7718907B2 (en) * | 2007-04-12 | 2010-05-18 | Condor-Werke Gebr. Frede Gmbh & Co. Kg. | Combination pressure switch |
| CN201796813U (en) * | 2010-09-27 | 2011-04-13 | 中国北车集团大同电力机车有限责任公司 | Pressure switch |
-
2012
- 2012-06-25 CN CN201210213869.5A patent/CN102840121B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2120899U (en) * | 1992-05-14 | 1992-11-04 | 邱克敏 | Pressure switch for air compressor |
| CN2593346Y (en) * | 2003-01-03 | 2003-12-17 | 乐清市力夫机电有限公司 | Barometic switch for air compressor |
| CN101629566A (en) * | 2008-07-16 | 2010-01-20 | 康多尔工厂美国公司 | Combination pressure switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102840121A (en) | 2012-12-26 |
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