A sealing plug assembly includes a plug and a housing, the plug and the housing including co-operating means structures whereby they may be secured together, the plug including two circumferentially extending grooves within which o ring seals are located, and the housing including an aperture having a bore within which the plug is adapted to be located, the housing also including a spring loaded radially extending pin which projects into the aperture bore and which is adapted to project into either of the grooves within the plug if an o ring is omitted, thus preventing the plug being secured with the housing by the co-operating means structures.
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1. A sealing plug assembly comprising a plug member and having a radially outermost cylindrical surface, said surface defining at least one circumferentially extending groove for receipt of an o ring seal therein, a housing the for said plug member, said housing defining a bore for location of said plug and housing including member therein, co-operating means on said plug member and said housing whereby the said plug member may be secured together the radially outermost cylindrical surface of the plug including at least one circumferentially extending groove within which an o ring seal may be disposed, the housing including an aperture within which the plug is adapted to be located within said housing, said housing further including at least one radially extending pin moveable between a first position projecting into said base of said housing and a second position in which it does not so project, said pin being adapted to locate within the said at least one circumferentially extending groove when the said o ring is omitted from the assembly such as thereby to prevent the said plug member being secured within the said housing by the said co-operating means.
2. A sealing plug assembly as claimed in
3. A sealing plug assembly as claimed in
4. A sealing plug device assembly as claimed in
5. A sealing plug assembly as claimed in
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a being are mounted upon the engine main shafts which are rotatably mounted within bearings.
The engine bearing bearings which supports support the respective main shafts are all lubricated from a central oil supply comprising the oil tank 20 which includes a magnetic chip detector not shown in this drawing.
FIG. 2 of the drawings shows a cross-sectional view of the sealing plug assembly in two positions. The upper portion of the drawing shows the plug properly assembled into its housing in a fluid tight manner with the O rings included. The lower portion of the drawing shows the sealing plug improperly assembled with O rings omitted.
The sealing plug assembly shown at FIG. 2 consits consists of a housing 22 having a bore or internal chamber 22a within which the plug 23 is located, the plug including a magnetic chip detector 23a and having two grooves 24 and 25 included within in its cylindrical surface within which O rings are located which form a fluid type tight seal between the housing 22 and the plug 23. As will be seen from the drawings, if the O rings are correctly located with the grooves 24 and 25 upon assembly of the plug 23 into the housing 22, the radially extending spring loaded pin 26 will be displaced radially outwards by firstly riding up the chamfered portion 27 of the plug 23 and thereafter over the O rings. The plug therefor therefore may be pushed completely home and located in the preferred location by means of a bayonet type fitting, which essentially consists of pins 28 located upon the plug which engage behind portions 29 secured to the housing 22.
If however the O rings are omitted from the assembly as shown in the lower half of FIG. 2, it will be seen that the spring loaded pin 26 will be urged into the empty groove 24 and thus prevent the plug 23 being pushed fully home such that the bayonet type fitting cannot serve to lock the two members together. It will be appreciated that the spring loaded pin 26 will prevent the sealing plug being completely assembled if either or both of the O rings, or both rings are omitted from the assembly therefore ensuring the provision of a fluid type tight joint.
If the plug is completely omitted from the housing the device is automatically sealed by means of the spring urged member 30 which is automatically displaced such that face 31 comes into sealing engagement 32 and therefore makes the assembly fluid tight.
Cooper, Gordon C., Dawson, Margaret L.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Nov 16 1990 | Rolls-Royce plc | (assignment on the face of the patent) | / |
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