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US 3,939,651 AGranted
Mounting for attaching a tubular member in co-axial registration with an aperture in a wall
AssigneeCaterpillar Tractor Co.
InventorRobert Noel Penny
Life of this patent
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AssigneeCaterpillar Tractor Co.
InventorRobert Noel Penny
Estimating the term…
A mounting particularly for attaching a tubular nozzle shroud member of a gas turbine in co-axial registration with an aperture in a supporting wall comprising a spigot at the end of the tubular member to be fitted into the aperture, the spigot being of complementary shape to the aperture and having radially outwardly extending lugs spaced apart around its periphery, and the wall having a corresponding number of notches spaced apart around the periphery of the aperture, the lugs being aligned with the notches and inserted through the latter by axial movement of the tubular member and retained, in the manner of a bayonet-type of coupling, by the portions of the wall between the notches when the tubular member has been partly turned about its longitudinal axis, the tubular member also having a flange spaced axially from the lugs and sealingly engaged with the wall when the lugs are located behind said wall portions, to hold the tubular member from axial movement with respect to the wall, the wall and the flange each having a pin-receiving opening therein, the openings being so positioned in the wall and the flange that when the tubular member has been turned to the retained position the openings are in registration one with the other and receive a removable locking pin to prevent turning of the tubular member from the retained position, one of the openings being elongate in a direction radially of the longitudinal axis of the tubular member to permit limited relative movement between the tubular member and the wall.
A gas turbine engine including a turbine, ducting positioned upstream and downstream of said turbine and defining a working fluid passage through said turbine, the ducting including a tubular nozzle shroud member, supporting structure for said shroud member, said shroud member having at one end thereof a spigot which is to be fitted into an aperture in said supporting structure, and a mounting supporting the tubular nozzle shroud member in co-axial registration with the aperture in said supporting structure, said mounting comprising said spigot, which is of complementary shape to said aperture, a plurality of radially outwardly extending lugs spaced apart around the periphery of said spigot, and the supporting structure having a corresponding number of notches spaced apart around the periphery of the aperture, said lugs when aligned with the notches being insertable through said notches by axial movement of said tubular member and retained, in the manner of a bayonet-type of coupling, by portions of said supporting structure between said notches when said tubular member has been partly turned abouts its longitudinal axis, said tubular member also having a flange spaced axially from said lugs and sealingly engageable with said supporting structure when said lugs are located behind said portions between said notches, said lugs and said flange together holding said tubular member from axial movement with respect to said supporting structure, said supporting structure and said flange each having a pin-receiving opening therein, said openings being so positioned in said supporting structure and said flange respectively that when said tubular member has been turned to said retained position said openings are in registration one with the other, a removable locking pin insertable in said registered openings to prevent turning of said tubular member from said retained position, one of said openings being elongate in a direction radially of the longitudinal axis of said tubular member to permit limited relative movement between said tubular member and said supporting structure.
Dependencies are inferred from the claim text.