CA2112537A1 - Lock for air hose connection - Google Patents
Lock for air hose connectionInfo
- Publication number
- CA2112537A1 CA2112537A1 CA002112537A CA2112537A CA2112537A1 CA 2112537 A1 CA2112537 A1 CA 2112537A1 CA 002112537 A CA002112537 A CA 002112537A CA 2112537 A CA2112537 A CA 2112537A CA 2112537 A1 CA2112537 A1 CA 2112537A1
- Authority
- CA
- Canada
- Prior art keywords
- housing
- airhose
- connection member
- locking device
- locking
- 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.)
- Abandoned
Links
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000010137 moulding (plastic) Methods 0.000 claims 1
- 230000007246 mechanism Effects 0.000 description 28
- 230000008878 coupling Effects 0.000 description 19
- 238000010168 coupling process Methods 0.000 description 19
- 238000005859 coupling reaction Methods 0.000 description 19
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002991 molded plastic Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L35/00—Special arrangements used in connection with end fittings of hoses, e.g. safety or protecting devices
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The present invention discloses a locking device for an airhose connection member having a valve opening comprising a housing adapted to slidably receive and releasably retain an airhose connection member therein.
The housing includes locking means movable from a locked position where the locking means engages with the valve opening of the airhose, connection member and prevents access thereto and prevents removal of the housing and an unlocked position where the locking means is disengaged from the valve opening whereby the air hose connection member can be withdrawn from the housing. Such a locking device has utility for tractor/trailer combinations.
The housing includes locking means movable from a locked position where the locking means engages with the valve opening of the airhose, connection member and prevents access thereto and prevents removal of the housing and an unlocked position where the locking means is disengaged from the valve opening whereby the air hose connection member can be withdrawn from the housing. Such a locking device has utility for tractor/trailer combinations.
Description
LOCK FOR AIR HOSE CONNECTION
The present invention relates to a locking mechanism for use with a tractor/trailer combination for the purpose of preventing theft of a trailer.
More particularly, the present invention relates to a locking mechanism which prevents access to the valve of the airline connection member (gladhand) of a trailer.
Tractor/Trailér combinations are widely utilized for the transport of merchandise. The trucks (tractors) which pull the trailers and the trailers are usually provided with an air brake system where air under pressure is supplied to an air line. The truck is connected to the air brake system of the trailer through the use of a coupling structure or glad hand composed of two main coupling members adapted to be rotated into a locking position.
Trailers in tractor/trailer combinations, when parked or stored with the tractor disconnected therefrom, are often stolen for the cargo which they contain. The theft of such trailers can be accomplished relatively ~quickly; a tractor (truck), which supplies the braking needs, may be connected to the parked trailer and the trailer merely driven away to a desired location.
U.S. Patent 4,543,984 discloses an anti-theft 30device for a trailer of a tractor/trailer combination. In this prior art device, a separate valve is inserted into the conduit system beyond the point of the air hose connection hook-up. The system of this Patent includes a housing permanently attached to a trailer, the housing carries therein the valve and lock portion of the brake airline lock system. This locking mechanism operates by way of a valve plug which has an interior opening therethrough so that when it is aligned with the airline, the valve is opened; when the plug is rotated a quarter turn, the opening through the plug is out of alignment with the opening through the valve body and therefore, the valve is turned off. A locking mechanism is provided for locking the valve in place. In this system, the actual hook ups for the airlines (gladhands) are outside the protective housing so that any person could still actually hook onto the air line system of a trailer.
U.S. Patent 4,109,673 discloses a protective attachment means for a gladhand of an air brake assembly which is primarily intended for connection to the rear of a trailer to which a second trailer would be attached. The protective attachment means includes a handle portion which can be rotated so that a dust cover sits above the opening of the air hose connection valve.
U.S. Patent 3,406,708 teaches a valve locking attachment for a utility, such as gas or like system. More particularly, this Patent is concerned with a lockable attachment for obstructing unauthorized access to a turnable valve member by means of which member the valve is opened and closed. This Patent teaches an improvement to known locking mechanisms by the provision of a housing to 21125~7 prevent the insertion of sawing tools and thereby resist attempts to break the lock.
U.S. Patent 4,681,134 relates to the field of locks for the valve beneath the storage tanks of a trailer to prevent unauthorized or accidental opening of the valves and emptying of the contents of the storage tank. The locking mechanism of this patent includes an anchor leg adapted to be mounted to a conduit extending from the tank of a truck; a locking leg adapted to be in a position in alignment and locking engagement with the valve handwheel to prevent opening thereof and by virtue of a hinge member can be moved to a position out of alignment with the valve handwheel, whereby the valve handwheel may be rotated to the valve opening position.
A feature of one embodiment of the present invention is to provide an anti-theft device for trailers of a tractor trailer combination.
Another feature of an embodiment of the present invention is to provide locking mechanism for the airline connection member or gladhand of a trailer of a tractor/trailer combination, wherein the locking~mechanism prevents access to the airline connection valve itself.
In accordance with an embodiment of the present invention there is provided a locking device for an airhose connection member having a valve opening comprising a housing adapted to slidably receive and releasably retain an airhose connection member therein. The housing includes ~ 2112537 locking means movable from a locked position where the locking means engages with the valve opening of the airhose connection member and prevents access thereto and prevents removal of the housing and an unlocked position where the locking means is disengaged from the valve opening whereby the airhose connection member can be withdrawn from the housing.
In a preferred embodiment, the housing is a one-piece housing which completely encloses and surrounds the valve opening of the airhose connection member.
The housing is preferably an injection molded plastic housing although the housing may be comprised of cast metal or any other suitable materials.
Preferably, the housing includes guide means for guiding and releasably retaining the airhose connection member therein. The guide means may be in the form of a pair of side walls which angle downwardly and inwardly within the housing.
The locking means is, in a preferred embodiment, a locking arrangement comprised of a bolt member and an actuating member, the bolt member being adapted to insertion into the valve opening of the airhose connection member when in the locked position. A particularly preferred locking arrangement is keyed spring loaded locking mechanism.
Preferably, the housing includes a protective 21125~7 internal slot/compartment for receiving a camming member of the airhose connection member.
Having thus generally described the invention, reference will now be made to the accompanying drawings which illustrate preferred embodiments of the invention, wherein:
Figures 1 and 2 illustrate a typical tractor/trailer combination, Fig. 1 illustrating the 10tractor connected to the trailer and Fig. 2 illustrating the tractor disconnected from the trailer;
Figure 3 is a perspective view of a typical gladhand or airline coupling member;
Figure 4 is perspective view of the locking mechanism of the present invention, partially broken away, illustrating a gladhand therein;
Figure 5 is a bottom plan view of the locking mechanism of the present invention with a gladhand therein;
Figure 6 is a perspective view of the locking 20mechanism itself;
Figure 7 is a cross-sectional view of the locking mechanism in an unlocked position;
Figure 8 is a cross-sectional view of the locking mechanism in the unlocked position, a gladhand being illustrated therein in dotted lines; and Figure 9 is a cross-sectional view of the locking mechanism in the locked position, a gladhand being illustrated therein in dotted lines.
30Reference will initially be made to Figures 1 and 2 which illustrate a conventional tractor/trailer arrangement and also to Figure 3 which illustrates a conventional gladhand or airline connection member.
In Figure 1, the tractor/trailer combination is illustrated in a ready to transport position wherein the tractor or truck 10 is connected to the trailer 12. Such a connection involves the connection of the air brake system (not shown) through the provision of airline connection means 13.
Figure 2 illustrates the tractor 10 disconnected from the trailer 12, the trailer 12 being typically supported, when in a parked or storage position, by a front support leg 14. As illustrated in this Figure, the connection means 13 includes a coupling member or gladhand 15 which is adapted for coupling to a similar coupling member or gladhand on the trailer 12 (not shown) Figure 3 illustrates a typical gladhand or airline coupling member which is generally designated by reference numeral 22. Each gladhand or coupling member 22 typically includes a port 23 at one end thereof; the port 23 may include a threaded portion 2S to permit the coupling of an airhose 27 thereto. The inside of the gladhand head 29 may be hollow to form an air chamber (not shown) which is in communication with the port 23. The air chamber (not shown) is also in communication with an aperture/valve opening 24, which aperture 24 is adapted for cooperation with a similar aperture on a second gladhand (not shown).
Each coupling member is typically provided with a gasket 30 is provided around the aperture 24. When a pair of gladhands are coupled together (not shown), the gaskets 30 of each gladhand are pressed tightly together to form an airtight seal between the coupling members or gladhands.
Accordingly, an air passage between a pair of gladhands is formed by each port 23, the air chambers (not shown) and the aligned apertures 24 of each gladhand.
Each gladhand or coupling member 22 includes a first camming surface 26 and a second c~mm;ng surface 28, both the first camming surface 26 and the second c~mm- ng surface 28 being of a conventional configuration and utilized to connect with similar surfaces of an opposing gladhand.
The gladhand 22 may be mounted directly to a trailer by any suitable mounting means (not shown) with a similar gladhand 22 being mounted to the truck or tractor.
Reference will now be made to Figures 4 to 9 which illustrate the locking mechanism of the present invention, generally designated by reference numeral 32.
Both Figures 4 and 5 illustrate a typical gladhand or coupling member 22 locked within the locking mechanism 32.
Figures 6 and 7 are views of the locking mechanism 32 itself; and Figures 8 and 9 are cross sectional views of the locking mechanism 32 with a gladhand or coupling member 22 therein, Figure 8 showing an unlocked position whereas Figure 9 illustrates the locked position.
The locking mechanism 32 comprises an opening 34 (see Fig. 6) through which the gladhand or coupling member 22 is slidably received. An extending lip portion 36 is provided and is adapted to be received in the space between the gladhand head 29 and the camming surface 28.
As best illustrated in Figure 5, the locking mechanism 32 is provided with a pair of guide arms 38, 39 which are adapted to guide and receive the head portion 29 of the gladhand or coupling member 22. Preferably the guide arms 38 and 39 are slightly convergent and provide a snap fit with the head portion 29 of the gladhand or coupling member 22.
As best illustrated in Figures 8 and 9, when the gladhand or coupling member 22 is inserted in the locking mechanism 32, the opening or aperture 24 is in alignment with a bolt 40 which is spring mounted by way of spring member 42 and which is actuated by way of a keyed arrangement 44. Accordingly, when in a locked position, the bolt 40 extends downwardly into the opening or aperture 24 of the gladhand or coupling member 22 and when unlocked, the bolt 40 is retracted to a position out of contact with the aperture 24. Although, a locking mechanism with a keyed arrangement is illustrated in the drawings, it will be understood that other conventional locking arrangements could be utilized, e.g. a combination lock, etc.
The locking mechanism 32 essentially covers the face of the gladhand 22 where the aperture 24 is present and in this way prevents tampering with the locking mechanism itself. In addition, portions of the locking mechanism surround various portions of the gladhand 22 to prevent removal of the locking mechanism from the gladhand 22 when in the locked position.
The locking mechanism 32 can be made of any suitable material, such as injection molded plastic, cast metal, etc., and may be configured in any manner which would surround a portion of the airhose connection member 22 with the valve opening 24 of the airhose connection member 22 being enclosed by the locking mechanism 32.
Having thus described preferred embodiments of the present invention, it will be understood that various modifications can be made to the above embodiments without departing from the spirit or scope of the invention.
The present invention relates to a locking mechanism for use with a tractor/trailer combination for the purpose of preventing theft of a trailer.
More particularly, the present invention relates to a locking mechanism which prevents access to the valve of the airline connection member (gladhand) of a trailer.
Tractor/Trailér combinations are widely utilized for the transport of merchandise. The trucks (tractors) which pull the trailers and the trailers are usually provided with an air brake system where air under pressure is supplied to an air line. The truck is connected to the air brake system of the trailer through the use of a coupling structure or glad hand composed of two main coupling members adapted to be rotated into a locking position.
Trailers in tractor/trailer combinations, when parked or stored with the tractor disconnected therefrom, are often stolen for the cargo which they contain. The theft of such trailers can be accomplished relatively ~quickly; a tractor (truck), which supplies the braking needs, may be connected to the parked trailer and the trailer merely driven away to a desired location.
U.S. Patent 4,543,984 discloses an anti-theft 30device for a trailer of a tractor/trailer combination. In this prior art device, a separate valve is inserted into the conduit system beyond the point of the air hose connection hook-up. The system of this Patent includes a housing permanently attached to a trailer, the housing carries therein the valve and lock portion of the brake airline lock system. This locking mechanism operates by way of a valve plug which has an interior opening therethrough so that when it is aligned with the airline, the valve is opened; when the plug is rotated a quarter turn, the opening through the plug is out of alignment with the opening through the valve body and therefore, the valve is turned off. A locking mechanism is provided for locking the valve in place. In this system, the actual hook ups for the airlines (gladhands) are outside the protective housing so that any person could still actually hook onto the air line system of a trailer.
U.S. Patent 4,109,673 discloses a protective attachment means for a gladhand of an air brake assembly which is primarily intended for connection to the rear of a trailer to which a second trailer would be attached. The protective attachment means includes a handle portion which can be rotated so that a dust cover sits above the opening of the air hose connection valve.
U.S. Patent 3,406,708 teaches a valve locking attachment for a utility, such as gas or like system. More particularly, this Patent is concerned with a lockable attachment for obstructing unauthorized access to a turnable valve member by means of which member the valve is opened and closed. This Patent teaches an improvement to known locking mechanisms by the provision of a housing to 21125~7 prevent the insertion of sawing tools and thereby resist attempts to break the lock.
U.S. Patent 4,681,134 relates to the field of locks for the valve beneath the storage tanks of a trailer to prevent unauthorized or accidental opening of the valves and emptying of the contents of the storage tank. The locking mechanism of this patent includes an anchor leg adapted to be mounted to a conduit extending from the tank of a truck; a locking leg adapted to be in a position in alignment and locking engagement with the valve handwheel to prevent opening thereof and by virtue of a hinge member can be moved to a position out of alignment with the valve handwheel, whereby the valve handwheel may be rotated to the valve opening position.
A feature of one embodiment of the present invention is to provide an anti-theft device for trailers of a tractor trailer combination.
Another feature of an embodiment of the present invention is to provide locking mechanism for the airline connection member or gladhand of a trailer of a tractor/trailer combination, wherein the locking~mechanism prevents access to the airline connection valve itself.
In accordance with an embodiment of the present invention there is provided a locking device for an airhose connection member having a valve opening comprising a housing adapted to slidably receive and releasably retain an airhose connection member therein. The housing includes ~ 2112537 locking means movable from a locked position where the locking means engages with the valve opening of the airhose connection member and prevents access thereto and prevents removal of the housing and an unlocked position where the locking means is disengaged from the valve opening whereby the airhose connection member can be withdrawn from the housing.
In a preferred embodiment, the housing is a one-piece housing which completely encloses and surrounds the valve opening of the airhose connection member.
The housing is preferably an injection molded plastic housing although the housing may be comprised of cast metal or any other suitable materials.
Preferably, the housing includes guide means for guiding and releasably retaining the airhose connection member therein. The guide means may be in the form of a pair of side walls which angle downwardly and inwardly within the housing.
The locking means is, in a preferred embodiment, a locking arrangement comprised of a bolt member and an actuating member, the bolt member being adapted to insertion into the valve opening of the airhose connection member when in the locked position. A particularly preferred locking arrangement is keyed spring loaded locking mechanism.
Preferably, the housing includes a protective 21125~7 internal slot/compartment for receiving a camming member of the airhose connection member.
Having thus generally described the invention, reference will now be made to the accompanying drawings which illustrate preferred embodiments of the invention, wherein:
Figures 1 and 2 illustrate a typical tractor/trailer combination, Fig. 1 illustrating the 10tractor connected to the trailer and Fig. 2 illustrating the tractor disconnected from the trailer;
Figure 3 is a perspective view of a typical gladhand or airline coupling member;
Figure 4 is perspective view of the locking mechanism of the present invention, partially broken away, illustrating a gladhand therein;
Figure 5 is a bottom plan view of the locking mechanism of the present invention with a gladhand therein;
Figure 6 is a perspective view of the locking 20mechanism itself;
Figure 7 is a cross-sectional view of the locking mechanism in an unlocked position;
Figure 8 is a cross-sectional view of the locking mechanism in the unlocked position, a gladhand being illustrated therein in dotted lines; and Figure 9 is a cross-sectional view of the locking mechanism in the locked position, a gladhand being illustrated therein in dotted lines.
30Reference will initially be made to Figures 1 and 2 which illustrate a conventional tractor/trailer arrangement and also to Figure 3 which illustrates a conventional gladhand or airline connection member.
In Figure 1, the tractor/trailer combination is illustrated in a ready to transport position wherein the tractor or truck 10 is connected to the trailer 12. Such a connection involves the connection of the air brake system (not shown) through the provision of airline connection means 13.
Figure 2 illustrates the tractor 10 disconnected from the trailer 12, the trailer 12 being typically supported, when in a parked or storage position, by a front support leg 14. As illustrated in this Figure, the connection means 13 includes a coupling member or gladhand 15 which is adapted for coupling to a similar coupling member or gladhand on the trailer 12 (not shown) Figure 3 illustrates a typical gladhand or airline coupling member which is generally designated by reference numeral 22. Each gladhand or coupling member 22 typically includes a port 23 at one end thereof; the port 23 may include a threaded portion 2S to permit the coupling of an airhose 27 thereto. The inside of the gladhand head 29 may be hollow to form an air chamber (not shown) which is in communication with the port 23. The air chamber (not shown) is also in communication with an aperture/valve opening 24, which aperture 24 is adapted for cooperation with a similar aperture on a second gladhand (not shown).
Each coupling member is typically provided with a gasket 30 is provided around the aperture 24. When a pair of gladhands are coupled together (not shown), the gaskets 30 of each gladhand are pressed tightly together to form an airtight seal between the coupling members or gladhands.
Accordingly, an air passage between a pair of gladhands is formed by each port 23, the air chambers (not shown) and the aligned apertures 24 of each gladhand.
Each gladhand or coupling member 22 includes a first camming surface 26 and a second c~mm;ng surface 28, both the first camming surface 26 and the second c~mm- ng surface 28 being of a conventional configuration and utilized to connect with similar surfaces of an opposing gladhand.
The gladhand 22 may be mounted directly to a trailer by any suitable mounting means (not shown) with a similar gladhand 22 being mounted to the truck or tractor.
Reference will now be made to Figures 4 to 9 which illustrate the locking mechanism of the present invention, generally designated by reference numeral 32.
Both Figures 4 and 5 illustrate a typical gladhand or coupling member 22 locked within the locking mechanism 32.
Figures 6 and 7 are views of the locking mechanism 32 itself; and Figures 8 and 9 are cross sectional views of the locking mechanism 32 with a gladhand or coupling member 22 therein, Figure 8 showing an unlocked position whereas Figure 9 illustrates the locked position.
The locking mechanism 32 comprises an opening 34 (see Fig. 6) through which the gladhand or coupling member 22 is slidably received. An extending lip portion 36 is provided and is adapted to be received in the space between the gladhand head 29 and the camming surface 28.
As best illustrated in Figure 5, the locking mechanism 32 is provided with a pair of guide arms 38, 39 which are adapted to guide and receive the head portion 29 of the gladhand or coupling member 22. Preferably the guide arms 38 and 39 are slightly convergent and provide a snap fit with the head portion 29 of the gladhand or coupling member 22.
As best illustrated in Figures 8 and 9, when the gladhand or coupling member 22 is inserted in the locking mechanism 32, the opening or aperture 24 is in alignment with a bolt 40 which is spring mounted by way of spring member 42 and which is actuated by way of a keyed arrangement 44. Accordingly, when in a locked position, the bolt 40 extends downwardly into the opening or aperture 24 of the gladhand or coupling member 22 and when unlocked, the bolt 40 is retracted to a position out of contact with the aperture 24. Although, a locking mechanism with a keyed arrangement is illustrated in the drawings, it will be understood that other conventional locking arrangements could be utilized, e.g. a combination lock, etc.
The locking mechanism 32 essentially covers the face of the gladhand 22 where the aperture 24 is present and in this way prevents tampering with the locking mechanism itself. In addition, portions of the locking mechanism surround various portions of the gladhand 22 to prevent removal of the locking mechanism from the gladhand 22 when in the locked position.
The locking mechanism 32 can be made of any suitable material, such as injection molded plastic, cast metal, etc., and may be configured in any manner which would surround a portion of the airhose connection member 22 with the valve opening 24 of the airhose connection member 22 being enclosed by the locking mechanism 32.
Having thus described preferred embodiments of the present invention, it will be understood that various modifications can be made to the above embodiments without departing from the spirit or scope of the invention.
Claims (9)
1. A locking device for an airhose connection member having a valve opening comprising: a housing adapted to slidably receive and releasably retain an airhose connection member therein, said housing including locking means movable from a locked position where said locking means engages with the valve opening of the airhose connection member and prevents access thereto and prevents removal of the housing and an unlocked position where said locking means is disengaged from said valve opening whereby said air hose connection member can be withdrawn from said housing.
2. The locking device as claimed in claim 1, wherein said housing further includes guide means for guiding and releasably retaining the airhose connection member therein.
3. The locking device as claimed in claim 2, wherein said guide means comprise a pair of side walls angled inwardly.
4. The locking device as claimed in claim 1, wherein said locking means includes a bolt member and an actuating member, said bolt member adapted for insertion into the valve opening of the airhose connection member when in the locked position.
5. The locking device as claimed in claim 1, wherein said housing comprises a one piece housing.
6. The locking device of claim 1, wherein said housing encloses and surrounds the valve opening of the airhose connection member.
7. The locking device as defined in claim 1, wherein the airhose connection member has a camming member and said housing includes a protective internal slot for receiving said cam member.
8. The locking device as defined in claim 1, wherein said housing is a one piece integral plastic molding.
9. The locking device as defined in claim 1, wherein said locking means is spring loaded and actuatable by way of a key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002112537A CA2112537A1 (en) | 1993-12-29 | 1993-12-29 | Lock for air hose connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002112537A CA2112537A1 (en) | 1993-12-29 | 1993-12-29 | Lock for air hose connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2112537A1 true CA2112537A1 (en) | 1995-06-30 |
Family
ID=4152678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002112537A Abandoned CA2112537A1 (en) | 1993-12-29 | 1993-12-29 | Lock for air hose connection |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2112537A1 (en) |
-
1993
- 1993-12-29 CA CA002112537A patent/CA2112537A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19960630 |