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A gas turbine engine fan blade containment assembly (38) comprising a generally cylindrical, or frustoconical, metal casing (40) has an upstream portion (56), a transition portion (58) and a blade containment portion (54). The upstream portion (56) has a flange (42) connecting the metal casing (40)

A gas turbine engine fan blade containment assembly (38) comprising a generally cylindrical, or frustoconical, metal casing (40) has an upstream portion (56), a transition portion (58) and a blade containment portion (54). The upstream portion (56) has a flange (42) connecting the metal casing (40) to a flange (48) on axially adjacent casing (46). The blade containment portion (54) has a greater thickness (T2) than the thickness (T1) of the upstream portion (54). The transition portion (58) connects the blade containment portion (54) and the upstream portion (56) to transmit loads from the blade containment portion (54) to the flange (42) on the upstream portion (56). The ratio of the thickness (T4) of the flange (42) on the upstream portion (56) to the thickness (T1) of the upstream portion (56) is between 3 to 1 and 6 to 1. The flange (42) on the upstream portion (56) is radially scalloped (41) between adjacent fasteners (49,51) and the upstream portion (54) is relatively thin such that the flange (42) and upstream portion (56) are allowed to deform to reduce impact loads transmitted to the flange (48) on the casing (46).

대표청구항 ▼

A gas turbine engine fan blade containment assembly (38) comprising a generally cylindrical, or frustoconical, metal casing (40) has an upstream portion (56), a transition portion (58) and a blade containment portion (54). The upstream portion (56) has a flange (42) connecting the metal casing (40)

A gas turbine engine fan blade containment assembly (38) comprising a generally cylindrical, or frustoconical, metal casing (40) has an upstream portion (56), a transition portion (58) and a blade containment portion (54). The upstream portion (56) has a flange (42) connecting the metal casing (40) to a flange (48) on axially adjacent casing (46). The blade containment portion (54) has a greater thickness (T2) than the thickness (T1) of the upstream portion (54). The transition portion (58) connects the blade containment portion (54) and the upstream portion (56) to transmit loads from the blade containment portion (54) to the flange (42) on the upstream portion (56). The ratio of the thickness (T4) of the flange (42) on the upstream portion (56) to the thickness (T1) of the upstream portion (56) is between 3 to 1 and 6 to 1. The flange (42) on the upstream portion (56) is radially scalloped (41) between adjacent fasteners (49,51) and the upstream portion (54) is relatively thin such that the flange (42) and upstream portion (56) are allowed to deform to reduce impact loads transmitted to the flange (48) on the casing (46). kpack, adjoining and releasably connecting the two said primary storage compartments such that when said releasable closure is closed these primary storage compartments are held fast, each to the other, having their back panels positioned in an approximately parallel orientation to said main panel of the backpack, and such that when said releasable closure is opened, said primary storage compartments are able to hinge and rotate about the axis of their line of attachment to the backpack such that their back panels are thence approximately perpendicular to said main panel of the backpack, and a supplemental storage area is exposed; a pair of shoulder straps fixedly attached to said backpack proximal top rear side of said main panel, with the other end being fixedly attached proximal bottom rear side of said main panel, to allow said backpack to be carried on the back of a wearer. 2. The backpack of claim 1 wherein said releasable closure extends vertically one hundred percent of the length of said primary storage compartments, or otherwise selectively permits the complete separation of their junction. 3. The backpack of claim 1 wherein said primary storage compartments are of approximately equal dimension in width. 4. The backpack of claim 3 wherein said primary storage compartments are rotationally re-positioned to effectively form side compartments when the backpack is deployed in its expanded form. 5. The backpack of claim 3 wherein said primary storage compartments are rotationally re-positioned to expose a space encompassing the majority of the front side of said main panel of said backpack, this space being made available for additional storage. 6. The backpack of claim 1 wherein said primary storage compartments have a range of rotational re-positioning in any configuration from between thirty degrees of travel to one hundred eighty degrees of travel from their original position, which is considered to be approximately parallel to the main panel of the backpack. 7. The backpack of claim 1 further including a collapsible supplemental storage compartment which is exposed when said releasable closure is unfastened and the primary storage compartments are repositioned to their outwardly rotated position, this storage compartment being made of nylon or like fabric, and having a front panel, a back panel, two side panels, a top panel, and a bottom panel, with said panels being fixedly attached to one another such that they form a storage container of an approximately rectangular cubic form, and with this storage compartment having an aperture formed in or near the top to permit access. 8. The backpack of claim 7 wherein the described supplemental storage compartment is generally constructed of nylon fabric or like material, but which has at least one portion of one panel which is constructed of ventilated nylon mesh, or netting, or like material, such that said storage compartment is suitable for the transportation of fresh meat. 9. The backpack of claim 1 wherein all said storage compartments may be further internally subdivided into various and separate cells, each with its separate access aperture and selectively releasable mechanism for closure.