10 results about "Incompressible material" patented technology

An introducer sheath assembly for percutaneously delivering a medical device that maintains hemostasis in a patient. The assembly has a hub, a hub cap and a hemostasis valve. The introducer sheath assembly has a longitudinal axis and a lumen formed therein. The hemostasis valve has a frame portion and a valve portion, the valve portion having a plurality of slits that are offset through the thickness of the valve portion therein and an extension of the frame portion formed from an incompressible material. The extension of the frame portion is received by a valve seat feature in the hub, when the valve is received by the hub. The valve seat feature also receives a seating portion of the hub cap as the hub and hub cap are advanced into engagement, the seating portion of the hub cap advanced into the valve seat feature subjecting the incompressible extension of the frame portion to a compressive force.

A self-aligning bearing support assembly for supporting a radial load rotary or linear bearing. The bearing support assembly has a main axis (A) and includes an outer sleeve and an inner sleeve at least partially received in the outer sleeve. The inner sleeve has an axially extending bore for supporting a rotary or linear bearing or for forming a bearing surface of a bearing. Three or more circumferentially separated chambers are formed between the inner sleeve and the outer sleeve. Each chamber is confined in all directions by walls of the assembly. A lump of a substantially incompressible material fills each of the at least three chambers with the chamber concerned substantially completely enclosing the lump.

The invention discloses a finite element calculation method of a nearly incompressible material and computer equipment, and the finite element calculation method comprises the following steps: constructing a geometric model, endowing parameters of the nearly incompressible material to the geometric model, endowing boundary conditions and loads to the geometric model, and obtaining a finite element parameter model of the nearly incompressible material; performing mesh generation on the finite element parameter model according to a pre-selected unit type to obtain a finite element model; establishing a unit stiffness matrix of the units; assembling the unit stiffness matrix to form a global stiffness matrix; discretizing the load to generate a global node force vector, and calculating to obtain a node displacement vector; and performing post-processing by utilizing the node displacement vector to obtain displacement, stress and strain of the finite element model. According to the method, the volume self-locking characteristic of the unit is eliminated by correcting the part, related to the volume, in the shape function derivative matrix B, so that the volume self-locking problem of the nearly incompressible material in the finite element calculation process can be well solved.

Gear wheel that is provided with spokes (17) which extend between a rim (16) supporting a gear mesh (15) and a corresponding gear hub (18), whereby free spaces (19) are located between the spokes (17) which extend between the rim (16) and the gear hub (18), characterised in that at least one of said free spaces (19) is filled with a block (20) made of a rigid, incompressible material, whereby between the gear wheel (10) on the one hand and the block (20) on the other hand a viscoelastic material (21) is located.

An introducer sheath assembly for percutaneously delivering a medical device that maintains hemostasis in a patient. The assembly has a hub, a hub cap and a hemostasis valve. The introducer sheath assembly has a longitudinal axis and a lumen formed therein. The hemostasis valve has a frame portion and a valve portion, the valve portion having a plurality of slits that are offset through the thickness of the valve portion therein and an extension of the frame portion formed from an incompressible material. The extension of the frame portion is received by a valve seat feature in the hub, when the valve is received by the hub. The valve seat feature also receives a seating portion of the hub cap as the hub and hub cap are advanced into engagement, the seating portion of the hub cap advanced into the valve seat feature subjecting the incompressible extension of the frame portion to a compressive force.

The invention discloses a method for acquiring a strength factor of an incompressible material, and belongs to the technical field of fracture mechanics, and the method comprises the following steps: constructing a virtual grid at a crack tip of the incompressible material containing crack defects; based on a Hellman variational method, carrying out displacement field and strain field finite element calculation on the virtual grid unit to obtain a displacement field and a stress-strain field of the virtual grid unit; according to the displacement field and the stress-strain field of the virtual grid unit, virtual grid convergence calculation is carried out on the energy release rate of the crack tip, and the convergent energy release rate is obtained; and calculating the strength factor of the incompressible material according to the convergent energy release rate. The method can accurately calculate the strength factor of the incompressible material.

A gear is provided with spokes (17) extending between a rim (16) supporting a gear mesh (15) and a corresponding gear hub (18), where free spaces (19) are located between the spokes (17) extending between the rim (16) and the gear hub (18), characterized in that at least one of the free spaces (19) is filled with a block (20) made of a rigid incompressible material, and the block (20) is made of a non-compressible material. Wherein a viscoelastic material (21) is positioned between the gearwheel (10) on the one hand and the block (20) on the other hand.

The present invention relates to a device for measuring mechanical stresses in a material using one or more networks of sensors of elongated and intersecting shapes in an elastic material. The elastic and preferably incompressible material is shaped directly on the sensors which are thin strips of piezoelectric material, in order to ensure good cohesion and increase the signal of said sensors during the deformation of the material. This arrangement thus makes it possible, in addition to measuring the stress, to generate sufficient energy to power electronics and wireless communication to a smartphone to avoid the need for a battery to be recharged. One of the applications is a sole for detecting pressure and temperature conditions leading to the risk of blisters appearing for athletes, construction workers, etc., or ulcers for diabetics. Figure to be published for the abstract: Figure n3

An introducer sheath assembly for percutaneously delivering a medical device that maintains hemostasis in a patient. The assembly has a hub, a hub cap and a hemostasis valve. The introducer sheath assembly has a longitudinal axis and a lumen formed therein. The hemostasis valve has a frame portion and a valve portion, the valve portion having a plurality of slits that are offset through the thickness of the valve portion therein and an extension of the frame portion formed from an incompressible material. The extension of the frame portion is received by a valve seat feature in the hub, when the valve is received by the hub. The valve seat feature also receives a seating portion of the hub cap as the hub and hub cap are advanced into engagement, the seating portion of the hub cap advanced into the valve seat feature subjecting the incompressible extension of the frame portion to a compressive force.

A fabric item that comes into repeated contact with a staining agent may be provided with anti-soiling features to help prevent the staining agent from transferring to the fabric. The fabric item may be a case or strap for an electronic device or may be an integral portion of an electronic device. The anti-soiling features may include a raised lip of material having a higher elastic modulus than the fabric. The anti-soiling features may include an incompressible material (e.g., fused fabric, fabric impregnated with adhesive, or non-fabric materials such as metal or glass), edge piping, molded fabric, protruding ridges, stitches covered with welt, a recess that receives a cord of a removable strap, and / or compressible fabric regions. An internal frame member may protrude through the fabric or may press on an inner surface of the fabric to form anti-soiling features.