초록 ▼

An expansible device for exerting force which has a generally “S”shape cross-section, being formed by stepped diameter cylinder, and arrangements using such a device are disclosed. The device may exert sealing forces and be controlled by admission of fluid pressure which acts on a thin wall member s

An expansible device for exerting force which has a generally “S”shape cross-section, being formed by stepped diameter cylinder, and arrangements using such a device are disclosed. The device may exert sealing forces and be controlled by admission of fluid pressure which acts on a thin wall member so supported as to be subjected to compressive stress alone.

대표청구항 ▼

A force transmitting device capable of sealing against fluid flow while accommodating a limited range of movement and comprising an annular thin wall member having stepped diameter cylindrical portions joined by a force transmitting surface portion which portions cooperate to impart a generally “S”s

A force transmitting device capable of sealing against fluid flow while accommodating a limited range of movement and comprising an annular thin wall member having stepped diameter cylindrical portions joined by a force transmitting surface portion which portions cooperate to impart a generally “S”shaped cross-section to said thin wall member, restraining means engaging said thin wall member for supporting inner and outer axial and circumferential terminal end portions thereof agsinst movement, a movable member having a surface contoured to engage one side of said thin wall member for supporting said portions thereof against tensile stress, and means for exerting force against the other side of said thin wall member for transmission therethrough to said movable member, said thin wall and movable members cooperating for accommodating movement by displacement of the material of said thin wall member from one to another of the portions thereof.