EP0422161A4 - Wet tank drain valve - Google Patents
Wet tank drain valveInfo
- Publication number
- EP0422161A4 EP0422161A4 EP19900905885 EP90905885A EP0422161A4 EP 0422161 A4 EP0422161 A4 EP 0422161A4 EP 19900905885 EP19900905885 EP 19900905885 EP 90905885 A EP90905885 A EP 90905885A EP 0422161 A4 EP0422161 A4 EP 0422161A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- drain
- piston
- valve
- driven
- drain valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/002—Air treatment devices
- B60T17/004—Draining and drying devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/02—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled thermally
- F16T1/10—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled thermally by thermally-expansible liquids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/12—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by excess or release of pressure
- F16T1/14—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by excess or release of pressure involving a piston, diaphragm, or bellows, e.g. displaceable under pressure of incoming condensate
Definitions
- Patent Application TITLE WET TANK DRAIN VALVE
- the present invention relates to a drain valve which is used to drain condensate from a wet tank used in conjunction with pneumatic braking systems on vehicles such as buses, trucks, truck trailers, trains, construction equipment and large recreational vehicles.
- Pneumatic braking systems in vehicles exhibit the condensation of water, oil and other impurities during compression and subsequent cooling of the pressurized air which is employed to actuate air driven pistons for the movement of drums and discs in the braking system.
- the pressurized air is stored in a plurality of tanks after it has been compressed during which it cools resulting in the condensation of water vapor, oil and other impurities present therein including compressor lubricating oil and gasoline vapor, the vast majority of which condense and collect in the air storage tank immediately connected to the compressor which known as the "wet tank.”
- the condensate collected in the "wet" tank must be drained periodically to prevent its entrainment into the braking system with the potential for damage to or functional degradation of the system.
- the manually operated drain valve is frequently located in an inaccessable position beneath the truck which subjects the driver to exposure to grease and dirt. This discourages the driver from draining the wet tank even if he remembers* to so do.
- FIG. 1 is a schematic, side elevational view of the system showing the drain valve of the present invention connected to the wet tank of a pneumatic brake system of a vehicle.
- FIG. 2 is a perspective, side view of the drain valve showing the mounting bolts.
- FIG. 3 is a perspective, exploded, partially sectional view of the drain valve along its longitudinal or operational axis.
- FIGS. 4 and 5 are partially sectioned, side elevational views of the drain valve taken along lines 4 and 5 on FIG.2.
- FIG. 1 is a schematic side, elevational view of a wet tank 1 wherein condensed moisture and other impurities collect and a secondary air tank 2 connected to the wet tank 1 through an air line or conduit 3 which is provided with a one-way or check valve 4 to prevent air from escaping from the secondary tank 2 to the wet tank 1 when it is vented to the atmosphere to drain.
- Condensed moisture and impurities accumulated in the wet tank 1 are drained through service line or conduit 5 at the bottom of the wet tank, through the drain valve 6 of the present invention, when open, to discharge through the drain line 28.
- FIG.2 is a perspective, side view of the drain valve, 6, which is attached to any appropriate part of the vehicle by mounting bolts 7, 8.
- the drain valve 6 is controlled by an electrically operated valve 10 which is operatively connected on one side to a source of air pressure through conduit 11 and on the other side to a pneumatic piston 9 having an external extension 12.
- Valve 10 is actuated by electricity from the vehicle's electrical system through its ignition switch 25 to contacts 26 and 27 on the valve 10.
- the contacts 26 and 27 may also be shrouded with insulating material to protect the electrical connection.
- FIG.3, is a perspective, partially sectioned, exploded view of the drain valve 6, and shows the pneumatic piston 9 having the external extension 12 operatively engaged to a cylindrical drain valve piston 13 which carries two axially spaced-apart "0" rings 14, 15 thereon for water tight, axially slidable engagement within a conforming cylindrical, internal valve cavity 16 within the drain valve 6.
- the cavity 16 is open at the opposite ends of the valve 6.
- the valve 6 is provided with an inlet 17 in its top communicating with the internal cavity 16.
- the lowermost end of the service line 5 is connected to the inlet 17.
- the drain valve 6 is also provided with an outlet 18 in its bottom communicating with the cavity 16.
- the outlet 18 is spaced-apart from the inlet 17 along the long or operating axis of the valve 6.
- the piston 13 is retained within the cavity 16 by a retaining ring 20 which closes the end of the cavity 16 end opposite the pneumatic piston together with an "0" ring 21 which receives and seals the extension 22 of the drain piston 13.
- the retaining ring 20 is secured to the drain valve 6 by cap screws 23.
- the cavity 16 is closed at its opposite end by the external portion 12 of the pneumatic piston 9.
- the extension 22 on the drain valve piston 13 carries an axially mounted spring 24 which is compressible between the retaining ring 20 and an annular, radially extending shoulder 29 formed on the drain piston 13 within the cavity 16.
- FIGS. 4 and 5 are partially sectioned, side elevational views of the valve 6 taken along lines 4, 5 in FIG. 2, and shows the operational position of the drain valve 6 when the ignition switch 25 of the vehicle is in the "on" position and the drain valve piston 13 is in a closed position at rest within the cavity 16 by virtue of the expansive pressure of the spring 24. In this closed position, the pneumatic piston is disconnected from the source of air pressure by means of the electrically operated valve 10 and the inlet 17 and outlet 18 are sealed from each other by the "0" ring 15.
- the "0" rings 14, 15, 21 may be made of rubber, or neoprene, or similar materials resistant to water vapor and contaminants.
- valve 10 When the ignition key 25 is in the "off" position, the valve 10 is electrically actuated by power from the vehicle's electrical system, through the ignition switch 25 to terminals 26, 27 on the valve 10. This in turn connects the pneumatic piston 9 to a source of air pressure, driving its piston extension 12 longitudinally against the drain piston 13 moving it to the open position shown in FIG 5. This opens the cavity 16 simultaneously to inlet 17 and outlet 18, thereby draining the wet tank 1 of accumulated liquid condensate and contaminants.
- the ignition key is turned to the "on" position which closes the electrically operated valve 10 thereby disconnecting the pneumatic piston 9 from the source of air pressure.
- the spring 24 again drives the drain valve piston 13 to the closed position shown in Figure 4.
- Means are provided for venting the pneumatic piston 9 when the air pressure valve 10 is closed. Such means are well-known in the art and need not be detailed further.
- the extension 22 on the drain valve piston 13 extends beyond the drain valve 6 and can be manually driven to return the drain valve piston 13 to the "closed" position in the event that the spring 24 cannot close the valve 6 when its source of air pressure is disconnected by valve 10. This prevents such a malfunction of the drain valve 6 from preventing pressurization of the braking system.
- the braking system is always fully drained, which precludes the liquid containing water vapor and other contaminants such as oil, gasline vapor, alcohol vapor, etc. from damaging the system, including the remote brake drums and other devices, particularly those devices, such as "0" rings and seals, which are made of rubber, neoprene, plastic and similar materials which are easily attacked by water and contaminants.
- the remote brake drums and other devices particularly those devices, such as "0" rings and seals, which are made of rubber, neoprene, plastic and similar materials which are easily attacked by water and contaminants.
- One of the factors which helps to achieve this full drainage result is that there is a purge of liquid contents and of pressurized air from wet tank 1 into the drain valve 6 because of the pressure differential between the pressurized wet tank 1 and the atmospheric pressure through the drain valve 6.
- the drain valve 6 operates efficiently at all times, even in cold weather, because the air in the wet tank 1 is warmed by the air compressor and by braking action.
- the pressurized air goes in at approximately 95 psi to the wet tank 1 and shuts off at about 125 psi. Because of the direct service line 5 beween the wet tank 1 and the drain valve 6 into the cavity 16 between the two axially spaced-apart "0" rings 14, 15, the warm air is periodically forced downward through the service line 5 to warm the drain valve 6.
- the condensed liquid containing impurities can be discharged from the drain valve 6 into a sump container for collection and storage, to be removed at a later time.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US33179789A | 1989-04-03 | 1989-04-03 | |
US331797 | 1989-04-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0422161A1 EP0422161A1 (en) | 1991-04-17 |
EP0422161A4 true EP0422161A4 (en) | 1991-09-11 |
Family
ID=23295421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900905885 Withdrawn EP0422161A4 (en) | 1989-04-03 | 1990-03-28 | Wet tank drain valve |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0422161A4 (en) |
CA (1) | CA2013769A1 (en) |
WO (1) | WO1990012244A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6514051B2 (en) * | 2001-03-16 | 2003-02-04 | Bendix Commercial Vehicle Systems, Llc. | Oil filter used in combination with a heat generating element |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2330027A (en) * | 1941-07-14 | 1943-09-21 | Russell C Churchman | Automatic mechanism for draining water from tanks or the like |
US2330040A (en) * | 1942-03-19 | 1943-09-21 | Bendix Westinghouse Automotive | Fluid pressure system |
US2687841A (en) * | 1947-12-29 | 1954-08-31 | Nellie Churchman | Valve used as a control |
US2845081A (en) * | 1954-06-09 | 1958-07-29 | Robert H George | Drain valves |
US3107126A (en) * | 1961-06-28 | 1963-10-15 | Bendix Westinghouse Automotive | Spring brake emergency release system |
IT1182837B (en) * | 1985-08-22 | 1987-10-05 | Aldo Miulli | PNEUMATIC DEVICE FOR THE DISCHARGE OF CONDENSATE FROM THE GAS TANKS UNDER PRESSURE, IN PARTICULAR FROM THE COMPRESSED AIR TANKS PRESENT IN INDUSTRIAL VEHICLES |
-
1990
- 1990-03-28 EP EP19900905885 patent/EP0422161A4/en not_active Withdrawn
- 1990-03-28 WO PCT/US1990/001752 patent/WO1990012244A1/en not_active Application Discontinuation
- 1990-04-03 CA CA 2013769 patent/CA2013769A1/en not_active Abandoned
Non-Patent Citations (2)
Title |
---|
No further relevant documents have been disclosed. * |
See also references of WO9012244A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1990012244A1 (en) | 1990-10-18 |
CA2013769A1 (en) | 1990-10-03 |
EP0422161A1 (en) | 1991-04-17 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK FR GB IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19910409 |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 19910722 |
|
AK | Designated contracting states |
Kind code of ref document: A4 Designated state(s): AT BE CH DE DK FR GB IT LI LU NL SE |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CHILLE, FRANK, A., SR. |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: CHILLE, FRANK, A., SR. |
|
17Q | First examination report despatched |
Effective date: 19920909 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19940210 |