Extendible slit tube members and methods for manufacturing extendible slit tube members are provided. In one aspect, an extendible member (10) comprises a laminated shell (2) of plural fibre reinforced layers (P1-P5) constructed and arranged to be configurable between a coiled form and an extended form. In the extended form (12) the shell is resiliently biased in the form of an elongate tube having longitudinal edges (14) defining a slit (3) along its length and wherein the shell can be opened out at the slit to assume a flattened form in which it can be wound about an axis extending transversely to its longitudinal direction to assume its coiled form (11). In the region of one or both longitudinal edges (50), the amount of reinforcing fibre is less than in the region between the edge regions (51). In another aspect, a flexible cord (40) may be attached along the edge of a shell.

A chain component of a chain for power transmission coated with a layer of hard material includes a substrate based on steel and a layer of hard material on an outer surface of the substrate based on steel, with the layer of hard material containing metal nitrides and the C mass concentration in the layer of hard material decreasing in the direction toward the outer surface of the layer of hard material.

A chain component of a chain for power transmission coated with a layer of hard material includes a substrate based on steel and a layer of hard material on an outer surface of the substrate based on steel, with the layer of hard material containing metal nitrides and the C mass concentration in the layer of hard material decreasing in the direction toward the outer surface of the layer of hard material.

A cooker with a gasket may include a top plate on which a plurality of burners may be placed; a manifold panel provided in front of the top plate and including thereon a plurality of knobs to control output powers of the plurality of burners; and a gasket that extends along a front end of the top plate and is compressed between the top plate and the manifold panel to hermetically seal the top plate and the manifold panel.

Extendible slit tube members and methods for manufacturing extendible slit tube members are provided. In one aspect, an extendible member (10) comprises a laminated shell (2) of plural fibre reinforced layers (P1-P5) constructed and arranged to be configurable between a coiled form and an extended form. In the extended form (12) the shell is resiliently biased in the form of an elongate tube having longitudinal edges (14) defining a slit (3) along its length and wherein the shell can be opened out at the slit to assume a flattened form in which it can be wound about an axis extending transversely to its longitudinal direction to assume its coiled form (11). In the region of one or both longitudinal edges (50), the amount of reinforcing fibre is less than in the region between the edge regions (51),In another aspect, a flexible cord (40) may be attached along the edge of a shell.

Extendible slit tube members and methods for manufacturing extendible slit tube members are provided. In one aspect, an extendible member (10) comprises a laminated shell (2) of plural fibre reinforced layers (P1-P5) constructed and arranged to be configurable between a coiled form and an extended form. In the extended form (12) the shell is resiliently biased in the form of an elongate tube having longitudinal edges (14) defining a slit (3) along its length and wherein the shell can be opened out at the slit to assume a flattened form in which it can be wound about an axis extending transversely to its longitudinal direction to assume its coiled form (11). In the region of one or both longitudinal edges (50), the amount of reinforcing fibre is less than in the region between the edge regions (51),In another aspect, a flexible cord (40) may be attached along the edge of a shell.

The invention relates to methods for producing parallel-perpendicular spherical systems and can be used to assemble structures in engineering, construction or other arts. The method comprises the following operations: first, selecting of at least three identical elements; determining of at least one connection point on the first element; at least, determining of the connection point on the second element; connecting of the elements at certain points of the junction in such a way that the planes passing through the first element and the second element are perpendicular; selecting of the next element; determining of its points of intersection with first and second elements; connecting of the element with the first and second elements at the intersection points in such a way that the planes passing through the elements are mutually perpendicular, wherein meeting of the condition that the first element is parallel to the fourth one, the second element is parallel to the fifth one, and the third element is parallel to the sixth element. The claimed solution simplifies the assembly of three-dimensional objects and increases their reliability.

A cooker with a gasket may include a top plate on which a plurality of burners may be placed; a manifold panel provided in front of the top plate and including thereon a plurality of knobs to control output powers of the plurality of burners; and a gasket that extends along a front end of the top plate and is compressed between the top plate and the manifold panel to hermetically seal the top plate and the manifold panel.

A chain component of a chain for power transmission coated with a layer of hard material includes a substrate based on steel and a layer of hard material on an outer surface of the substrate based on steel, with the layer of hard material containing metal nitrides and the C mass concentration in the layer of hard material decreasing in the direction toward the outer surface of the layer of hard material.

A chain component of a chain for power transmission coated with a layer of hard material includes a substrate based on steel and a layer of hard material on an outer surface of the substrate based on steel, with the layer of hard material containing metal nitrides and the C mass concentration in the layer of hard material decreasing in the direction toward the outer surface of the layer of hard material.