CA1047138A - Electrical plug support bracket - Google Patents
Electrical plug support bracketInfo
- Publication number
- CA1047138A CA1047138A CA231,697A CA231697A CA1047138A CA 1047138 A CA1047138 A CA 1047138A CA 231697 A CA231697 A CA 231697A CA 1047138 A CA1047138 A CA 1047138A
- Authority
- CA
- Canada
- Prior art keywords
- plug
- arm
- receptacle
- support bracket
- circular
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/58—Auxiliary devices
- B60D1/62—Auxiliary devices involving supply lines, electric circuits, or the like
- B60D1/64—Couplings or joints therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
Abstract
ELECTRICAL PLUG SUPPORT BRACKET
Abstract of the Disclosure A substantially rigid plastic plug support bracket is provided for supporting an electrical plug which is de-tachably mounted in a receptacle therefor on a vehicular body such as the wall of a trailer of a tractor-trailer vehicle. The plastic plug support bracket includes a base portion and a plug supporting portion pivotally connected thereto. The base portion includes a substantially V-shaped base plate which is secured through holes therein to a re-ceptacle for the electrical plug. The base portion further includes, at the bottom of the plate, a pair of spaced parallel pivot brackets which extend from and are perpendicular to one face of the base plate. The plug supporting portion includes an elongated arm and a substantially semi-circular band con-nected, at the mid-point of its periphery, integrally to one end of said arm with the interior of the band facing away from the arm. The interior of the band is shaped to conform to an axially extending portion of the lower semi-circular half of the electrical plug which is substantially circular in cross-section. The other end of the arm is pivotally connected to and between the pivot brackets. The other end of the arm is substantially rectangular in cross-section and includes a face on each side thereof which frictionally abuts a face of a respective one of said pair of pivot brackets to, frictionally hold the plug supporting portion against free pivotal movement relative to the base portion. The base portion also includes a spacer member, adjacent the bottom of the base plate, which extends from the other face of the base plate. The spacer member fills a portion of the space between the plug support bracket and the panel of the vehicle when the plug support bracket is connected to the receptacle to thereby provide additional support for the plug support bracket.
Abstract of the Disclosure A substantially rigid plastic plug support bracket is provided for supporting an electrical plug which is de-tachably mounted in a receptacle therefor on a vehicular body such as the wall of a trailer of a tractor-trailer vehicle. The plastic plug support bracket includes a base portion and a plug supporting portion pivotally connected thereto. The base portion includes a substantially V-shaped base plate which is secured through holes therein to a re-ceptacle for the electrical plug. The base portion further includes, at the bottom of the plate, a pair of spaced parallel pivot brackets which extend from and are perpendicular to one face of the base plate. The plug supporting portion includes an elongated arm and a substantially semi-circular band con-nected, at the mid-point of its periphery, integrally to one end of said arm with the interior of the band facing away from the arm. The interior of the band is shaped to conform to an axially extending portion of the lower semi-circular half of the electrical plug which is substantially circular in cross-section. The other end of the arm is pivotally connected to and between the pivot brackets. The other end of the arm is substantially rectangular in cross-section and includes a face on each side thereof which frictionally abuts a face of a respective one of said pair of pivot brackets to, frictionally hold the plug supporting portion against free pivotal movement relative to the base portion. The base portion also includes a spacer member, adjacent the bottom of the base plate, which extends from the other face of the base plate. The spacer member fills a portion of the space between the plug support bracket and the panel of the vehicle when the plug support bracket is connected to the receptacle to thereby provide additional support for the plug support bracket.
Description
7~1L3~
This invention relates to a plastic plug support bracket which supports an electrical plug which is detachably mounted in a receptacle therefor on a panel of a vehicular body, such as the forwardmost panel of a trailer of a tractor-trailer type vehicle.
The electrical system of the trailer of a tractor-trailer vehicle is detachably connected to that of the tractor by means of one or more plug and electrical re-ceptacle assemblies. The receptacle member of the assembly is usually mounted on the front panel of the trailer and/or the rear panel of the tractor and the plug member is fastened to the ends of a cable which leads from the tractor to lights and the like on the trailer. The receptacle member has a cylindrical body enclosing a plurality of prongs which are inserted in corresponding electrically conductive bores in the plug each secured to a wire of the cable. A flange is provided about the cylindrical body for fastening the receptacle to the trailer. Since the plug is a relatively large a~d heavy metallic or molded cylindrical member, it must be supported externally of the receptacle to prevent it from being shaken loose from the receptacle while the vehicle is being operated.
Metal plug support brackets for supporting the electri-cal plug detachably mounted in the receptacle are known in the prior art. ~owever, these metal plug support brackets have proven to be disadvantageous for several reasons. First, the metal brackets are extremely brittle and are easily broken when subjected to the vibration transmitted to them from the operation of the vehicle on which they are mounted This 1~47~
breaking is even more pronounced when the bracket is used in a low temperature environment of,for example, 32F or lower. As the vehicles on which these brackets are mounted sometimes travel in low temperature regions, they are often subjected to these low temperatures and therefore frequently break and cause down-time for the vehicle for repairs. Second-ly, in the prior art metal plug support brackets, the plug supporting portion is freely pivotally connected to the base portion so that when the plug is disconnected from the re~
ceptacle, the plug supporting portion is continually, again by reason of the vibration to which it is subjected by the vehicle in operation, pivoting freely from the base portion and slapping or knocking against the panel of the vehicle which, of course, is a nuisance to the vehicle driver. Furthermore, this continual slapping or knocking is a further cause of the above-noted hreaking problem of the prior art metal bracket. Thirdly, because the prior art plug support bracket is made of metal, the interior of the semi-circular band of the plug supporting portion must be machined afker it is made so that its shape will conform to the axial extending portion of the lower semi-circular half of the electrical plug which it was made to support. This cumbersome machining increases the cost of such brackets.
In accordance with this invention, a substantially rigid plastic plug support bracket which is resistant to damage by impact, impervious to gas, oil, grease, ultraviolet rays and ozone, and will remain stable at temperatures of from -75F
to ~400F is provided. By providing a substantially plastic plug support bracket as in the invention, the bracket is not easily broken and is, in fact, substantially impact-proof even at low temperatures down to -75F or lower.
This invention relates to a plastic plug support bracket which supports an electrical plug which is detachably mounted in a receptacle therefor on a panel of a vehicular body, such as the forwardmost panel of a trailer of a tractor-trailer type vehicle.
The electrical system of the trailer of a tractor-trailer vehicle is detachably connected to that of the tractor by means of one or more plug and electrical re-ceptacle assemblies. The receptacle member of the assembly is usually mounted on the front panel of the trailer and/or the rear panel of the tractor and the plug member is fastened to the ends of a cable which leads from the tractor to lights and the like on the trailer. The receptacle member has a cylindrical body enclosing a plurality of prongs which are inserted in corresponding electrically conductive bores in the plug each secured to a wire of the cable. A flange is provided about the cylindrical body for fastening the receptacle to the trailer. Since the plug is a relatively large a~d heavy metallic or molded cylindrical member, it must be supported externally of the receptacle to prevent it from being shaken loose from the receptacle while the vehicle is being operated.
Metal plug support brackets for supporting the electri-cal plug detachably mounted in the receptacle are known in the prior art. ~owever, these metal plug support brackets have proven to be disadvantageous for several reasons. First, the metal brackets are extremely brittle and are easily broken when subjected to the vibration transmitted to them from the operation of the vehicle on which they are mounted This 1~47~
breaking is even more pronounced when the bracket is used in a low temperature environment of,for example, 32F or lower. As the vehicles on which these brackets are mounted sometimes travel in low temperature regions, they are often subjected to these low temperatures and therefore frequently break and cause down-time for the vehicle for repairs. Second-ly, in the prior art metal plug support brackets, the plug supporting portion is freely pivotally connected to the base portion so that when the plug is disconnected from the re~
ceptacle, the plug supporting portion is continually, again by reason of the vibration to which it is subjected by the vehicle in operation, pivoting freely from the base portion and slapping or knocking against the panel of the vehicle which, of course, is a nuisance to the vehicle driver. Furthermore, this continual slapping or knocking is a further cause of the above-noted hreaking problem of the prior art metal bracket. Thirdly, because the prior art plug support bracket is made of metal, the interior of the semi-circular band of the plug supporting portion must be machined afker it is made so that its shape will conform to the axial extending portion of the lower semi-circular half of the electrical plug which it was made to support. This cumbersome machining increases the cost of such brackets.
In accordance with this invention, a substantially rigid plastic plug support bracket which is resistant to damage by impact, impervious to gas, oil, grease, ultraviolet rays and ozone, and will remain stable at temperatures of from -75F
to ~400F is provided. By providing a substantially plastic plug support bracket as in the invention, the bracket is not easily broken and is, in fact, substantially impact-proof even at low temperatures down to -75F or lower.
- 2 13~
Also, by providing a substantially rigid plastic plug support bracket as in the invention, if the plug is made by injection molding or other known processes, the interior of the semi-circular band of the plug supporting portion is shaped to conform to the axially extending portion of the semi-circular lower half of an electrical plug which is circular in cross-section and does not have to be subsequently machined to ob-tain the desired shape. Therefore, with the invention this otherwise cumbersome machining is not needed and should there-fore reduce the unit production cost of the plug supportbracket.
Also, in the invention, the transverse dimension of one end of the arm is substantially equal to the space be-tween the pivot brackets so that the plug supportlng portion of the bracket is frictionally held against free pivotal movement relative to the base portion by the frictional in-terface between the end of the arm and the pivot brackets.
In the advantageous embodiment to be described, the end of the arm is substantially rectangular in cross-section to pro-vide a face on each side of it which frictionally abuts a faceof a respective one of the pair of pivot brackets to frictional-ly hold the plug supporting bracket against free pivotal move-ment relative to the base portion. As a result of this aspect of the invention, the plug supporting portion is not freely pivotable relative to the base portion and therefore does not slap or knock against the panel of the vehicular body to which it is attached so that the nuisance caused to the operator of the vehicle by such slapping or knocking as well as the breakage of the bracket which may be caused by it is eliminated.
1~47~L3~
It is an object of this invention to provide a plastic plug support bracket which is substantially impact-proof and cannot he broken or rendered in any way inoperative when mounted on a vehicle when the vehicle is in normal operation.
It is a further object of this invention to provide a plastic plug support bracket which is impervious to gas, oil, and grease.
It is a further object of this invention to provide a plastic plug support bracket which is impervious to ultra-violet rays and ozone.
It is a further object of this invention to provide a plastic plug support bracket which will remain stable at temperatures from -75F to +400F.
It is a further object of this invention to provide a plastic plug support bracket which is not easily broken during normal operation of the vehicle on which it is mounted.
It is a further object of this invention to provide a plastic plug support bracket which is not easily borken during normal operation of the vehicle on which it is mounted, par-ticularly one which is not easily broken at temperatures down to -75F.
It is a still further object of this invention to pro-vide a plastic plug support bracket which does not require any subsequent cumbersome machining of any portion thereof after the bracket is completed.
It is still a further object of this invention to pro-vide a plastic plug support bracket in which the plug support-ing portion is not freely pivotable relative to the base ~47138 portion thereof so that the plug supporting portion is there-by prevented from slapping or knocking against the panel of a vehicle on which the bracket is mounted.
Fig. 1 is a perspective view showing the forward panel of the trailer of a tractor--trailer type vehicle.
Fig. 2 is a perspective view showing the panel of the vehicle with the receptacle mounted thereon and the sub-stantially rigid plastic plug support bracket connected to the receptacle with the electrical plug mounted in the re-ceptacle and the plug supporting portion of the bracket supporting the plug.
Fig. 3 is a view similar to Fig. 2 but showing the plug disconnected from the receptacle and the plug support-ing portion of the substantially rigid plastic plug support bracket out of its supporting position.
Fig. 4 is a side view, looking in the direction in which the plug is inserted, of the substantially rigid plastic plug support bracket mounted on a panel with the plug support-- ing portion of the bracket in its supporting position.
Fig. 5 is a view taken along line 5-5 of Fig. 4.
In Fig. 1, is shown a tractor-trailer T. On the forward-most panel P of the trailer of the vehicle are positioned a plurality of electrical receptacles 10 which receive a re-spective one of a corresponding number of electrical plugs 11.
The receptacles 10 and electrical plugs 11 received therein are well-known in the prior art. The purpose of the connection of the plug 11 into the receptacle 10 is to provlde power to the trailer from the tractor for the lights or other power equipment, such as a refrigeration unit, in the trailer.
~4713~
As shown in Fig. 3, each receptacle 10 includes a plurality of male prongs 12. Each prong 12 is received in a respective one of a plurality of openings 13 in the plug 11 when the plug is connected into the receptacle.
To further lock the plug in the receptacle, the receptacle has a longitudinal notch 14 cut into the upper portion of the interior surface thereof. A key 15 is provided on the exterior surface of the plug 11. The key 15 is shaped complementary to the notch 14 so as to further assist in locking and prevent rotation o the plug 11 in the receptacle 10. However, as is known in the prior art, by reason of the vibration to which the plug 11 and receptacle 10 are sub-jected by the operation of the vehicle on which they are mounted, the plug 11 tends to move or walk out of the receptacle 10 which, of course, results in a disconnection of the power from the tractor to the trailer of the tractor-trailer T. This cutoff of power to the trailer, of course, results in unnecessary and sometimes expensive down-time of any equipment, such as refrigeration units, in the trailer.
To prevent this unnecessary disconnection of the plug 11 from the receptacle 10, the invention provides a sub-stantially rigid plastic plug support bracket 20. The plug support bracket 20 comprises a base portion 30 and a plug supporting portion 40 which is pivotally connected to the base portion 30.
The base portion 30 comprises a substantially V-shaped base plate 31 with legs 34, 35 and a substantially semi-circular upper edge 32 therebetween (Figure 4). The edge 32 ~47~31~
is shaped so that it may be positioned around the lower half of the substantially circular plug receiving portion of the receptacle 10. Each of the legs 34, 35 o the V-shaped base plate 31 has an aperture 33 therein~ ~ bolt or screw 50 is inserted through each aperture 33 to secure it to the receptacle 10. As the receptacles of the prior art are provided with holes to secure them to the panel of the vehicle, it is desirable that the aperture 33 in each leg 34, 35 be spaced identical to the holes in the prior art receptacle so that the bolts or screws 50 can then be used to mount both the receptacle 10 and plug support brac-ket to the panel P of the vehicle as shown in Fig. 5.
The base portion 30 further includes, at the bottom of the base plate 31, a pair of spaced parallel pivot brac-kets 36. Each pivot bracket 36 extends from and is sub-stantially perpendicular to the face 31a of base plate 31.
The plug supporting portion 40 of the substantially rigid plastic plug support bracket 20 includes an elongated arm 41 and a substantially semi-circular band 46. The band 46 is integrally connected, at the mid-point of its periphery, to one end 42 of the arm 41. The interior sruface 46a of the band 46 is shaped to conform to the lower semi-circular half of the electrical plug 11. The length of arm 41 is such that when member 40 is in its supporting position shown in Figures 4 and 5, the upper surface of plug 11 is pressed against the inner surface of receptacle 10. In other words, the length of arm 41 from the pivot point to the inner surface of member 46 along the longitudinal axis of arm 41 is slightly larger than the distance between the pivot point and the botton of the plug 7~L31~3 in its normal inserted position where its axis coincides with that of receptacle 10 so that the plug is pushed upwardly so its axis is no longer parallel to the axis of the receptacle.
The other end 43 of the arm 41 is substantially rectangular in cross-section, as shown in Figs. 2 through 4, to provide a pair of faces 43a, 43b which frictionally abut the faces 36', 36'' of the pair of pivot brackets 36 (Figure 4). The end 43 has a transverse dimension which is substantially equal to the space d between the pair of pivot brackets 36.
By reason of the structural conformation of the end 43 of the arm 41 relative to that of the pair of pivot brackets 36, the plug supporting portion 40 of the plug support bracket 20 is held against free pivotal movement relative to the base portion 30 by the frictional interface formed between the faces 43a, 43b of the end 43 of the arm 41 and the faces 36', 36'' of the pivot brackets 36. As the plug supporting portion 40 of the plug support bracket 20 is not reely pivotable relative to the base portion 30, it will not slap or knock against the panel P when the plug support-ing portion is not in use in supporting the plug 11. A
strenghening rib 44 extends from the base member 43 along each side of arm 41 and semi-circular member 42.
The base portion 30 of the plug support bracket 20 also includes a spacer member 37 which extends from the other face 31b of the base plate 31. The spacer member 37 may be substantially circular in cross-section and is pro~
vided to take up the space between the lower portion of the base plate 31 and the panel P in the region below the 1~)47~38 receptacle 10. As the spacer member 37 is in abutment with the portion of the panel P, it provides additional support for the plug support bracket 20.
To provide the pivotal connection between the base portion 30 and the plug supporting portion 40, an aperture 36a is provided in each of the pivot brackets 36 and an aperture 43' is formed in the end 43 of the arm 41. A
pin 38 extends through these apertures so that the arm 41 may pivot about the a~is of the pin relative to the base portion 30.
The operation of the invention will now be described.
When the operator of a vehicle desires to provide an electri-cal connection from the tractor portion of the tractor-trailer T to the trailer, he merely lifts up the cap lOa closing the opening of the receptacle, and, by reason of the alignment made by the key 15 on the plug 11 with the notch 14 in the receptacle 10, forceably inserts the plug 11 into the receptacle 10. To prevent the plug 10 from slipping or walking out of the receptacle 10, the operator then moves the plug supporting portion of the plug support bracket 20 from a lower position as in Fig. 3, up into its position beneath the plug 11 into the plug supporting position shown in Figs. 2, ~ and 5. In this position the plug support bracket, with the interior surface 46a of the semi-circular band 46 supportingly abutting an axial portion of the lower half of the semi-circular surface of the plug 11, provides additional support for the plug 11 in the receptacle 10 and prevents the plug from moving or walking out of the receptacle. Also as noted above, g ~47~3~
additional support is also provided by the abutment of the spacer member 37 with the portion of the panel P below the receptacle 10 as shown in Figure 5.
When the operator desires to disconnect the plug 11 from the receptacle 10, he merely pulls the plug supporting portion 40 of the plug support bracket 20 outwardly and downwardly to pivot it about the axis of the pin 38 back to a lower position such as the one shown in Fig. 3. The operator then merely withdraws the plug 11 from the re-ceptacle 10 at which time the closure cap 10a of the re-ceptacle 10, by reason of its being spring biased to a closed position, covers the receptacle 10 to prevent dirt or other foreign matter from entering therein.
The plug support bracket 20 of this invention, may be made by any plastic or thermo-plastic which is substantially impact-proof, impervious to gas, oil, grease, ultraviolet rays and ozone and will remain stable at temperatures from -75F to ~400F. One example of such a plastic is the one sold by General Electric Company under the tradename "Valox", a moldable (polyethylene terephthalate)polyester.
It will, of course, occur to persons skilled in the art that many other plastics or thermo-plastics having the above characteristics are suitable for this invention.
The plug support bracket 20 of this invention is there-fore virtually unbreakable at all normal operating -temperatures to which the vehicle on which it is mounted would normally be subjected. Furthermore, by reason of the frictional inter-face in the pivotal connection between the plug supporting ~ 10 --~..
portion and the base portion of the plug support bracket 20, the plug supporting portion does not slap or knock against the panel and therefore is not a nuisance to the operator of the vehicle and will not cause breakage of the bracket.
Furthermore, when this bracket is made, the interior face 46a of the band 46 requires no further machining in order to have it conform as closely as possible to the lower periphery of the plug 11.
While the plug support bracket of this invention has been described above in connection with the tractor-trailer type vehicle, it will occur to persons skilled in the art that the plug support bracket is useable i.n any environment where the prior art plugs and receptacles have been used and is particularly useful in environments where the prior art plugs and receptacles are subjected for any reason to substantial vibration. For example, these receptacles have been mounted on the rear panel of the tractor of the tractor-trailer vehicle and on other types of vehicles such as refrigeration trucks, milk trucks, to provide an electrical connection to them from a main power source apart from the vehicle when the vehicle is otherwise in-operative.
It is evident from the above description that, by means of this invention, the deficiencies of the prior art metal plug support bracket are overcome.
Also, by providing a substantially rigid plastic plug support bracket as in the invention, if the plug is made by injection molding or other known processes, the interior of the semi-circular band of the plug supporting portion is shaped to conform to the axially extending portion of the semi-circular lower half of an electrical plug which is circular in cross-section and does not have to be subsequently machined to ob-tain the desired shape. Therefore, with the invention this otherwise cumbersome machining is not needed and should there-fore reduce the unit production cost of the plug supportbracket.
Also, in the invention, the transverse dimension of one end of the arm is substantially equal to the space be-tween the pivot brackets so that the plug supportlng portion of the bracket is frictionally held against free pivotal movement relative to the base portion by the frictional in-terface between the end of the arm and the pivot brackets.
In the advantageous embodiment to be described, the end of the arm is substantially rectangular in cross-section to pro-vide a face on each side of it which frictionally abuts a faceof a respective one of the pair of pivot brackets to frictional-ly hold the plug supporting bracket against free pivotal move-ment relative to the base portion. As a result of this aspect of the invention, the plug supporting portion is not freely pivotable relative to the base portion and therefore does not slap or knock against the panel of the vehicular body to which it is attached so that the nuisance caused to the operator of the vehicle by such slapping or knocking as well as the breakage of the bracket which may be caused by it is eliminated.
1~47~L3~
It is an object of this invention to provide a plastic plug support bracket which is substantially impact-proof and cannot he broken or rendered in any way inoperative when mounted on a vehicle when the vehicle is in normal operation.
It is a further object of this invention to provide a plastic plug support bracket which is impervious to gas, oil, and grease.
It is a further object of this invention to provide a plastic plug support bracket which is impervious to ultra-violet rays and ozone.
It is a further object of this invention to provide a plastic plug support bracket which will remain stable at temperatures from -75F to +400F.
It is a further object of this invention to provide a plastic plug support bracket which is not easily broken during normal operation of the vehicle on which it is mounted.
It is a further object of this invention to provide a plastic plug support bracket which is not easily borken during normal operation of the vehicle on which it is mounted, par-ticularly one which is not easily broken at temperatures down to -75F.
It is a still further object of this invention to pro-vide a plastic plug support bracket which does not require any subsequent cumbersome machining of any portion thereof after the bracket is completed.
It is still a further object of this invention to pro-vide a plastic plug support bracket in which the plug support-ing portion is not freely pivotable relative to the base ~47138 portion thereof so that the plug supporting portion is there-by prevented from slapping or knocking against the panel of a vehicle on which the bracket is mounted.
Fig. 1 is a perspective view showing the forward panel of the trailer of a tractor--trailer type vehicle.
Fig. 2 is a perspective view showing the panel of the vehicle with the receptacle mounted thereon and the sub-stantially rigid plastic plug support bracket connected to the receptacle with the electrical plug mounted in the re-ceptacle and the plug supporting portion of the bracket supporting the plug.
Fig. 3 is a view similar to Fig. 2 but showing the plug disconnected from the receptacle and the plug support-ing portion of the substantially rigid plastic plug support bracket out of its supporting position.
Fig. 4 is a side view, looking in the direction in which the plug is inserted, of the substantially rigid plastic plug support bracket mounted on a panel with the plug support-- ing portion of the bracket in its supporting position.
Fig. 5 is a view taken along line 5-5 of Fig. 4.
In Fig. 1, is shown a tractor-trailer T. On the forward-most panel P of the trailer of the vehicle are positioned a plurality of electrical receptacles 10 which receive a re-spective one of a corresponding number of electrical plugs 11.
The receptacles 10 and electrical plugs 11 received therein are well-known in the prior art. The purpose of the connection of the plug 11 into the receptacle 10 is to provlde power to the trailer from the tractor for the lights or other power equipment, such as a refrigeration unit, in the trailer.
~4713~
As shown in Fig. 3, each receptacle 10 includes a plurality of male prongs 12. Each prong 12 is received in a respective one of a plurality of openings 13 in the plug 11 when the plug is connected into the receptacle.
To further lock the plug in the receptacle, the receptacle has a longitudinal notch 14 cut into the upper portion of the interior surface thereof. A key 15 is provided on the exterior surface of the plug 11. The key 15 is shaped complementary to the notch 14 so as to further assist in locking and prevent rotation o the plug 11 in the receptacle 10. However, as is known in the prior art, by reason of the vibration to which the plug 11 and receptacle 10 are sub-jected by the operation of the vehicle on which they are mounted, the plug 11 tends to move or walk out of the receptacle 10 which, of course, results in a disconnection of the power from the tractor to the trailer of the tractor-trailer T. This cutoff of power to the trailer, of course, results in unnecessary and sometimes expensive down-time of any equipment, such as refrigeration units, in the trailer.
To prevent this unnecessary disconnection of the plug 11 from the receptacle 10, the invention provides a sub-stantially rigid plastic plug support bracket 20. The plug support bracket 20 comprises a base portion 30 and a plug supporting portion 40 which is pivotally connected to the base portion 30.
The base portion 30 comprises a substantially V-shaped base plate 31 with legs 34, 35 and a substantially semi-circular upper edge 32 therebetween (Figure 4). The edge 32 ~47~31~
is shaped so that it may be positioned around the lower half of the substantially circular plug receiving portion of the receptacle 10. Each of the legs 34, 35 o the V-shaped base plate 31 has an aperture 33 therein~ ~ bolt or screw 50 is inserted through each aperture 33 to secure it to the receptacle 10. As the receptacles of the prior art are provided with holes to secure them to the panel of the vehicle, it is desirable that the aperture 33 in each leg 34, 35 be spaced identical to the holes in the prior art receptacle so that the bolts or screws 50 can then be used to mount both the receptacle 10 and plug support brac-ket to the panel P of the vehicle as shown in Fig. 5.
The base portion 30 further includes, at the bottom of the base plate 31, a pair of spaced parallel pivot brac-kets 36. Each pivot bracket 36 extends from and is sub-stantially perpendicular to the face 31a of base plate 31.
The plug supporting portion 40 of the substantially rigid plastic plug support bracket 20 includes an elongated arm 41 and a substantially semi-circular band 46. The band 46 is integrally connected, at the mid-point of its periphery, to one end 42 of the arm 41. The interior sruface 46a of the band 46 is shaped to conform to the lower semi-circular half of the electrical plug 11. The length of arm 41 is such that when member 40 is in its supporting position shown in Figures 4 and 5, the upper surface of plug 11 is pressed against the inner surface of receptacle 10. In other words, the length of arm 41 from the pivot point to the inner surface of member 46 along the longitudinal axis of arm 41 is slightly larger than the distance between the pivot point and the botton of the plug 7~L31~3 in its normal inserted position where its axis coincides with that of receptacle 10 so that the plug is pushed upwardly so its axis is no longer parallel to the axis of the receptacle.
The other end 43 of the arm 41 is substantially rectangular in cross-section, as shown in Figs. 2 through 4, to provide a pair of faces 43a, 43b which frictionally abut the faces 36', 36'' of the pair of pivot brackets 36 (Figure 4). The end 43 has a transverse dimension which is substantially equal to the space d between the pair of pivot brackets 36.
By reason of the structural conformation of the end 43 of the arm 41 relative to that of the pair of pivot brackets 36, the plug supporting portion 40 of the plug support bracket 20 is held against free pivotal movement relative to the base portion 30 by the frictional interface formed between the faces 43a, 43b of the end 43 of the arm 41 and the faces 36', 36'' of the pivot brackets 36. As the plug supporting portion 40 of the plug support bracket 20 is not reely pivotable relative to the base portion 30, it will not slap or knock against the panel P when the plug support-ing portion is not in use in supporting the plug 11. A
strenghening rib 44 extends from the base member 43 along each side of arm 41 and semi-circular member 42.
The base portion 30 of the plug support bracket 20 also includes a spacer member 37 which extends from the other face 31b of the base plate 31. The spacer member 37 may be substantially circular in cross-section and is pro~
vided to take up the space between the lower portion of the base plate 31 and the panel P in the region below the 1~)47~38 receptacle 10. As the spacer member 37 is in abutment with the portion of the panel P, it provides additional support for the plug support bracket 20.
To provide the pivotal connection between the base portion 30 and the plug supporting portion 40, an aperture 36a is provided in each of the pivot brackets 36 and an aperture 43' is formed in the end 43 of the arm 41. A
pin 38 extends through these apertures so that the arm 41 may pivot about the a~is of the pin relative to the base portion 30.
The operation of the invention will now be described.
When the operator of a vehicle desires to provide an electri-cal connection from the tractor portion of the tractor-trailer T to the trailer, he merely lifts up the cap lOa closing the opening of the receptacle, and, by reason of the alignment made by the key 15 on the plug 11 with the notch 14 in the receptacle 10, forceably inserts the plug 11 into the receptacle 10. To prevent the plug 10 from slipping or walking out of the receptacle 10, the operator then moves the plug supporting portion of the plug support bracket 20 from a lower position as in Fig. 3, up into its position beneath the plug 11 into the plug supporting position shown in Figs. 2, ~ and 5. In this position the plug support bracket, with the interior surface 46a of the semi-circular band 46 supportingly abutting an axial portion of the lower half of the semi-circular surface of the plug 11, provides additional support for the plug 11 in the receptacle 10 and prevents the plug from moving or walking out of the receptacle. Also as noted above, g ~47~3~
additional support is also provided by the abutment of the spacer member 37 with the portion of the panel P below the receptacle 10 as shown in Figure 5.
When the operator desires to disconnect the plug 11 from the receptacle 10, he merely pulls the plug supporting portion 40 of the plug support bracket 20 outwardly and downwardly to pivot it about the axis of the pin 38 back to a lower position such as the one shown in Fig. 3. The operator then merely withdraws the plug 11 from the re-ceptacle 10 at which time the closure cap 10a of the re-ceptacle 10, by reason of its being spring biased to a closed position, covers the receptacle 10 to prevent dirt or other foreign matter from entering therein.
The plug support bracket 20 of this invention, may be made by any plastic or thermo-plastic which is substantially impact-proof, impervious to gas, oil, grease, ultraviolet rays and ozone and will remain stable at temperatures from -75F to ~400F. One example of such a plastic is the one sold by General Electric Company under the tradename "Valox", a moldable (polyethylene terephthalate)polyester.
It will, of course, occur to persons skilled in the art that many other plastics or thermo-plastics having the above characteristics are suitable for this invention.
The plug support bracket 20 of this invention is there-fore virtually unbreakable at all normal operating -temperatures to which the vehicle on which it is mounted would normally be subjected. Furthermore, by reason of the frictional inter-face in the pivotal connection between the plug supporting ~ 10 --~..
portion and the base portion of the plug support bracket 20, the plug supporting portion does not slap or knock against the panel and therefore is not a nuisance to the operator of the vehicle and will not cause breakage of the bracket.
Furthermore, when this bracket is made, the interior face 46a of the band 46 requires no further machining in order to have it conform as closely as possible to the lower periphery of the plug 11.
While the plug support bracket of this invention has been described above in connection with the tractor-trailer type vehicle, it will occur to persons skilled in the art that the plug support bracket is useable i.n any environment where the prior art plugs and receptacles have been used and is particularly useful in environments where the prior art plugs and receptacles are subjected for any reason to substantial vibration. For example, these receptacles have been mounted on the rear panel of the tractor of the tractor-trailer vehicle and on other types of vehicles such as refrigeration trucks, milk trucks, to provide an electrical connection to them from a main power source apart from the vehicle when the vehicle is otherwise in-operative.
It is evident from the above description that, by means of this invention, the deficiencies of the prior art metal plug support bracket are overcome.
Claims (9)
1. A substantially rigid plastic plug support bracket adapted to support an electrical plug detachably mounted in a receptacle therefor on a vehicular body, said bracket comprising:
a base portion, said base portion comprising a base plate, adapted to lie in a vertical plane when secured to a receptacle and, at the bottom of said plate, a pair of spaced parallel pivot brackets extending from and sub-stantially perpendicular to one face of said base plate, and a plug supporting portion comprising an elongated arm and a substantially semi-circular band connected, at the mid-point of its periphery, integrally to one end of said arm with the interior of said band facing away from said arm, the substantially semi-circular interior surface of said band being shaped to conform to an axially extending portion of the lower semi-circular half of an electrical plug, substantially circular in cross-section, which the plug supporting portion is adapted to support, the other end of said arm being pivotally connected to and between said pivot brackets, said end of said arm having a trans-verse dimension substantially equal to the space between said pivot brackets so that said plug supporting portion is frictionally held against free pivotal movement relative to the base portion by the frictional interface between the one end of said arm and said pivot brackets.
a base portion, said base portion comprising a base plate, adapted to lie in a vertical plane when secured to a receptacle and, at the bottom of said plate, a pair of spaced parallel pivot brackets extending from and sub-stantially perpendicular to one face of said base plate, and a plug supporting portion comprising an elongated arm and a substantially semi-circular band connected, at the mid-point of its periphery, integrally to one end of said arm with the interior of said band facing away from said arm, the substantially semi-circular interior surface of said band being shaped to conform to an axially extending portion of the lower semi-circular half of an electrical plug, substantially circular in cross-section, which the plug supporting portion is adapted to support, the other end of said arm being pivotally connected to and between said pivot brackets, said end of said arm having a trans-verse dimension substantially equal to the space between said pivot brackets so that said plug supporting portion is frictionally held against free pivotal movement relative to the base portion by the frictional interface between the one end of said arm and said pivot brackets.
2. A substantially rigid plastic plug support bracket as claimed in Claim 1, wherein:
the one end of said arm is substantially rec-tangular in cross-section to provide a face on each side thereof which frictionally abuts a face of a respective one of said pair of pivot brackets to frictionally hold said plug supporting portion against free pivotal movement relative to the base portion.
the one end of said arm is substantially rec-tangular in cross-section to provide a face on each side thereof which frictionally abuts a face of a respective one of said pair of pivot brackets to frictionally hold said plug supporting portion against free pivotal movement relative to the base portion.
3. A substantially rigid plastic plug support bracket as claimed in Claim 2, further comprising:
means defining an aperture in each of said pivot brackets, means defining an aperture in said one end of said arm, said pivot bracket apertures and said arm aperture being aligned, and a pin force fitted in and extending through the aperture in said arm and into the aperture in each of said pivot brackets whereby said arm is pivotable about the axis of said pin.
means defining an aperture in each of said pivot brackets, means defining an aperture in said one end of said arm, said pivot bracket apertures and said arm aperture being aligned, and a pin force fitted in and extending through the aperture in said arm and into the aperture in each of said pivot brackets whereby said arm is pivotable about the axis of said pin.
4. A substantially rigid plastic plug support bracket as claimed in Claim 3, wherein said base plate is substantial-ly V-shaped in cross-section with the upper edge thereof being substantially semi-circular so as to be positioned around the lower half of a substantially circular plug receiving portion of a receptacle to which the base portion is adapted to be secured, and means defining an aperture in the upper end portion of each leg of the V-shaped base plate through which a securing means may be inserted to secure the base portion to a receptacle.
5. A substantially rigid plastic plug support bracket as claimed in Claim 4, wherein:
said base portion further comprises, adjacent the bottom of said base plate, a spacer member which extends from the other face of said base plate, said spacer member being adapted to abut a vehicular body and thereby provide additional support for the plug support bracket when secured to a receptacle therefor on a vehicular body.
said base portion further comprises, adjacent the bottom of said base plate, a spacer member which extends from the other face of said base plate, said spacer member being adapted to abut a vehicular body and thereby provide additional support for the plug support bracket when secured to a receptacle therefor on a vehicular body.
6. A substantially rigid plastic plug support bracket as claimed in Claim 5, wherein:
the plug support bracket is substantially impact-proof, impervious to gas, oil, grease, ultraviolet rays and ozone and remains stable at temperatures from -75°F
to +400°F.
the plug support bracket is substantially impact-proof, impervious to gas, oil, grease, ultraviolet rays and ozone and remains stable at temperatures from -75°F
to +400°F.
7. An electrical plug and receptacle assembly com-prising a receptacle having a cylindrical plug receiving means and a flange adapted to be fastened to a wall of a tractor or trailor of a tractor-trailer vehicle and a cylindrical plug insertable in said receptacle to connect electrically a power source on the tractor with an electrical circuit of a trailor, and means for supporting the plug in the receptacle comprising a molded rigid plastic bracket, said bracket comprising:
a base portion, said base portion comprising a base plate, adapted to lie in a vertical plane when secured to said receptacle and, at the bottom of said plate, a pair of spaced parallel pivot brackets extending from and substantially per-pendicular to one face of said base plate, and a plug supporting portion comprising an elongated arm and a substantially semi-circular band connected, at the mid-point of its periphery, integrally to one end of said arm with the interior of said band facing away from said arm, the sub-stantially semi-circular interior surface of said band being shaped to conform to an axially extending portion of the lower semi-circular half of an electrical plug, substantially circular in cross-section, which the plug supporting portion is adapted to support, the other end of said arm being pivotally connected to and between said pivot brackets, said end of said arm having a transverse dimension substantially equal to the space between said pivot brackets so that said plug supporting portion is frictionally held against free pivotal movement relative to the base portion by the frictional interface between the one end of said arm and said pivot brackets.
a base portion, said base portion comprising a base plate, adapted to lie in a vertical plane when secured to said receptacle and, at the bottom of said plate, a pair of spaced parallel pivot brackets extending from and substantially per-pendicular to one face of said base plate, and a plug supporting portion comprising an elongated arm and a substantially semi-circular band connected, at the mid-point of its periphery, integrally to one end of said arm with the interior of said band facing away from said arm, the sub-stantially semi-circular interior surface of said band being shaped to conform to an axially extending portion of the lower semi-circular half of an electrical plug, substantially circular in cross-section, which the plug supporting portion is adapted to support, the other end of said arm being pivotally connected to and between said pivot brackets, said end of said arm having a transverse dimension substantially equal to the space between said pivot brackets so that said plug supporting portion is frictionally held against free pivotal movement relative to the base portion by the frictional interface between the one end of said arm and said pivot brackets.
8. The electrical plug and receptacle assembly of Claim 7, wherein:
said base plate is generally V-shaped and is adapted to be detachably secured to said flange on said receptacle with the legs of said V shaped base plate straddling the plug re-ceiving means and the base of said V-shaped base plate disposed below the plug receiving means;
the length of said plug supporting portion between its pivot axis through said pivot brackets and the plug supporting region of the semi-circular interior surface of said band being greater than the distance between said pivot axis and said lower semi-circular half of said plug when said plug is engaged with said receptacle whereby said plug supporting portion exerts a pressure against said plug and causes it to become bound in said receptacle.
said base plate is generally V-shaped and is adapted to be detachably secured to said flange on said receptacle with the legs of said V shaped base plate straddling the plug re-ceiving means and the base of said V-shaped base plate disposed below the plug receiving means;
the length of said plug supporting portion between its pivot axis through said pivot brackets and the plug supporting region of the semi-circular interior surface of said band being greater than the distance between said pivot axis and said lower semi-circular half of said plug when said plug is engaged with said receptacle whereby said plug supporting portion exerts a pressure against said plug and causes it to become bound in said receptacle.
9. The assembly of Claim 7 wherein said plug supporting portion has a strengthening rib extending along each side of the arm and said semi-circular band, the width of the ribs plus the width of the arm being substantially equal to the width of the plug supporting portion in the region thereof located between said pivot brackets.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US541399A US3915476A (en) | 1975-01-16 | 1975-01-16 | Electrical plug support bracket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1047138A true CA1047138A (en) | 1979-01-23 |
Family
ID=24159431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA231,697A Expired CA1047138A (en) | 1975-01-16 | 1975-07-17 | Electrical plug support bracket |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3915476A (en) |
| CA (1) | CA1047138A (en) |
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| US4017136A (en) * | 1975-08-25 | 1977-04-12 | Power Parts Company | Permanent tri-headed jumper cable for locomotives |
| US4113333A (en) * | 1977-05-23 | 1978-09-12 | Sloan Valve Company | Electrical connector receptacle |
| US4245875A (en) * | 1979-06-18 | 1981-01-20 | Amp Incorporated | Heavy duty plug and socket |
| US4343522A (en) * | 1980-09-05 | 1982-08-10 | National Steel Corporation | Jumper cable system for railway trains |
| US4405190A (en) * | 1981-05-11 | 1983-09-20 | Schroeder John H | Circuit interchange module |
| US4489977A (en) * | 1982-06-21 | 1984-12-25 | Earing Jr James F | Pickup truck with interchangeable bed components |
| US4624472A (en) * | 1984-01-18 | 1986-11-25 | Stuart Clifton F | Coupling mechanism for coupling fluid and electrical lines between adjacent vehicles |
| FR2570993B1 (en) * | 1984-09-28 | 1987-01-02 | Magyar Sa | SUPPORT PLATE FOR COUPLING HANDS AND ELECTRICAL TAKES FOR ISOLATED TANK SEMI-TRAILER |
| US4752236A (en) * | 1986-09-19 | 1988-06-21 | Carmichael Guy M | Security latch for electrical connectors |
| US4784610A (en) * | 1987-02-20 | 1988-11-15 | Stuart Clifton F | Electrical connector |
| US5306156A (en) * | 1992-04-03 | 1994-04-26 | Sport Rack Systems, Inc. | Mechanical and/or electro-mechanical interconnect system for vehicle load carrying components/accessories |
| US5288094A (en) * | 1992-10-23 | 1994-02-22 | Putnam Rex D | Bracket for supplying an electrical connector |
| US5302141A (en) * | 1992-11-23 | 1994-04-12 | Cole Hersee Company | Compatible trailer connection |
| US5490753A (en) * | 1993-01-08 | 1996-02-13 | Green; Richard | Roll on roll off device |
| US5252078A (en) * | 1993-02-23 | 1993-10-12 | Albert Langenbahn | Drive-up electric receptacle |
| US5401046A (en) * | 1994-02-01 | 1995-03-28 | Charlie E. Schwartz | Trailer and lifting mechanism |
| US5401174A (en) * | 1994-03-30 | 1995-03-28 | Chrysler Corporation | Universal charge port connector for electric vehicles |
| US5607221A (en) * | 1994-09-29 | 1997-03-04 | Justus; Jeff E. | Hook-up light for a truck tractor |
| US5955701A (en) * | 1997-09-15 | 1999-09-21 | Schockner; Phyllis L. | Electrical wall outlet cover for visually impaired persons |
| US6054779A (en) * | 1998-04-14 | 2000-04-25 | Strick Corporation | Electrical power connector for tandem trailers |
| US6080014A (en) * | 1998-06-01 | 2000-06-27 | Steiler; Richard W. | Trailer circuit connector mount |
| US6319039B1 (en) | 2000-01-25 | 2001-11-20 | U.S.A. Harness, Inc. | Connector for connecting electrical conductors so that the conductors are maintained and protected in watertight contact |
| ES2174711B1 (en) * | 2000-06-23 | 2004-06-16 | Angel Antoli Habas | CONNECTION DEVICE FOR FEEDING THE LIFTING MECHANISMS OF SOTERRED CONTAINERS. |
| US6902180B2 (en) * | 2003-02-24 | 2005-06-07 | Volvo Trucks North America, Inc. | Trailer line routing |
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| US7189085B1 (en) * | 2005-12-16 | 2007-03-13 | Yang Jerry S C | Outdoor set of plug and socket |
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| US8288651B2 (en) * | 2007-09-28 | 2012-10-16 | Kenneth Smith | Weatherproof connector |
| JP4371167B2 (en) * | 2008-03-31 | 2009-11-25 | 三菱自動車工業株式会社 | Support structure for vehicle connecting cord |
| AU2009201426B2 (en) * | 2009-04-13 | 2013-11-07 | Gravolin, Dennis Ronald Mr | Protective Housing Assembly |
| JP2011228257A (en) * | 2010-04-01 | 2011-11-10 | Panasonic Electric Works Co Ltd | Receptacle and charge device having the same |
| JP5447173B2 (en) * | 2010-05-17 | 2014-03-19 | 住友電装株式会社 | Connector fixing structure |
| US9093788B2 (en) | 2012-09-28 | 2015-07-28 | Atlantic Great Dane, Inc. | Power supply system including panel with safety release |
| US8764469B2 (en) * | 2012-09-28 | 2014-07-01 | Atlantic Great Dane, Inc. | Power supply system including panel with safety release |
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| US10112452B2 (en) * | 2015-07-27 | 2018-10-30 | Ford Global Technologies, Llc | Trailer and packaging system for trailer electrical components |
| JP6290847B2 (en) * | 2015-10-22 | 2018-03-07 | 本田技研工業株式会社 | Connector mounting structure for electric vehicles |
| USD857630S1 (en) | 2016-06-29 | 2019-08-27 | R&S Shaeffer Properties LLC | Plug receptacle assembly |
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| US9559475B1 (en) | 2016-06-29 | 2017-01-31 | R&S Shaeffer Properties LLC | Plug assemblies |
| USD848949S1 (en) | 2016-06-29 | 2019-05-21 | R&S Shaeffer Properties LLC | Socket receptacle assembly |
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| US9966713B1 (en) * | 2017-01-18 | 2018-05-08 | R&S Shaeffer Properties LLC | Receptacle assemblies |
| US10027072B1 (en) | 2017-01-18 | 2018-07-17 | R&S Schaeffer Properties LLC | Plug assemblies |
| US10377198B1 (en) | 2017-12-23 | 2019-08-13 | William R. Fields | Gladhand electrical connectivity towing system |
| US11230326B2 (en) * | 2018-11-13 | 2022-01-25 | Rivian Ip Holdings, Llc | Vehicle accessory port and plug |
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| US10886679B1 (en) | 2019-09-27 | 2021-01-05 | Smartplug Systems, LLC | Retrofit electrical system for dockside power pedestals |
| USD931818S1 (en) * | 2020-02-26 | 2021-09-28 | Polestar Performance Ab | Vehicle charge port |
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| US2595949A (en) * | 1948-05-26 | 1952-05-06 | Du Pont | Switch |
| US2659059A (en) * | 1952-10-20 | 1953-11-10 | Kenneth M Johnson | Retainer for electrical attachment plugs |
| US3059073A (en) * | 1960-11-15 | 1962-10-16 | Jr John S French | Trailer electrical connector |
| US3811104A (en) * | 1972-03-08 | 1974-05-14 | T Caldwell | Safety device for electrical outlets |
-
1975
- 1975-01-16 US US541399A patent/US3915476A/en not_active Expired - Lifetime
- 1975-07-17 CA CA231,697A patent/CA1047138A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3915476A (en) | 1975-10-28 |
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