A portable chopstick including two-piece square chopsticks is provided. The two-piece square chopsticks include an upper chopstick body, a lower chopstick body and a chopstick body aligning structure. The upper chopstick body has a lower end joint block; the lower chopstick body has an opposite upper end joint groove. The chopstick body aligning structure can be separated into two parts, which are precisely positioned in the upper chopstick body and the lower chopstick bod respectively, wherein the upper chopstick body and the lower chopstick body can be made of different materials. When the lower end joint block of the upper chopstick body is locked with the upper end joint groove of the lower chopstick body, the upper chopstick body is aligned with the lower chopstick body through the chopstick body aligning structure at their four sides.

The present invention achieves a high mechanical load capacity of a rod end by means of a component loop that passes around a bearing, where the component may be made of continuous-fiber reinforced composite material with thermoplastic matrix and where the continuous-fiber reinforced composite material with thermoplastic matrix may extend into a threaded stem of the rod end, and the component made of continuous-fiber reinforced composite material with thermoplastic matrix may be enclosed by short-fiber reinforced, long-fiber reinforced, or unreinforced thermoplastic. The threaded stem can be implemented with an external or an internal thread.

The present invention achieves a high mechanical load capacity of a rod end by means of a component loop that passes around a bearing, where the component may be made of continuous-fiber reinforced composite material with thermoplastic matrix and where the continuous-fiber reinforced composite material with thermoplastic matrix may extend into a threaded stem of the rod end, and the component made of continuous-fiber reinforced composite material with thermoplastic matrix may be enclosed by short-fiber reinforced, long-fiber reinforced, or unreinforced thermoplastic. The threaded stem can be implemented with an external or an internal thread.

Couplings disclosed herein can include a first coupling component having a cylindrical surface with a screw and a pin extending therefrom and a second coupling component having a prismatic surface with a first and a second through-hole. The first coupling component and the second coupling component can be configured such that relative motion between the first coupling component and the second coupling component can be restricted in all six degrees of freedom when the screw is engaged with the first through-hole to secure the cylindrical surface of the first component against the prismatic surface of the second component.

Couplings disclosed herein can include a first coupling component having a cylindrical surface with a screw and a pin extending therefrom and a second coupling component having a prismatic surface with a first and a second through-hole. The first coupling component and the second coupling component can be configured such that relative motion between the first coupling component and the second coupling component can be restricted in all six degrees of freedom when the screw is engaged with the first through-hole to secure the cylindrical surface of the first component against the prismatic surface of the second component.

An improved animal structure is disclosed. The structure includes various features which can improve transportation, ease of assembly, structural integrity, and/or aesthetic quality. The animal structure includes a post having multiple post sections, namely a first post section and a second post section. The first and section post sections are coupled to together by a post coupler wherein the post coupler is disposed completely within a hollow interior of the post when the first post section is flush with the second post section.

A frame includes a plurality of profile sections and at least one first adapter assembly. Each profile section includes at least one section extension surface, and one of the at least one section extension surface is provided with at least one first groove therein. Each first adapter assembly includes a first position-limiting block provided with at least one first mounting hole therein. The first position-limiting block is configured to be fixed in a first groove during assembly, and to fix other components to the profile section through the at least one first mounting hole.

Disclosed is a pipe vibration-proof channel capable of preventing vibration generated in a pipe from being transferred to the outside. Here, since a vertical channel connected to a horizontal channel on which the pipe is disposed is disposed to be separated from a structural section steel member, it is possible to prevent the vibration generated in the pipe from being transferred to the structural section steel member. Also, since a vibration-proof unit capable of absorbing the vibration of the pipe is disposed on a pipe fixing portion configured to fix a vibration-proof bracket and the pipe, it is possible to prevent the vibration of the pipe from being transferred to the vertical channel.

A flange connection system, including a pair of flange rings each including a neck portion and a radially extending flange portion. The radially extending flange portion includes a distal face including a contact surface that protrudes from a remainder of the distal face. The radially extending flange portion includes a plurality of circumferentially spaced bolt holes extending parallel to a center axis. The distal face including a first seal pocket radially inward of the contact surface and a second seal pocket radially outward of the contact surface, wherein in an assembled condition, the contact surface of the first flange ring is disposed against the contact surface of the second flange ring, a first seal ring is disposed in the first seal pockets, and a second seal ring is disposed in the second seal pockets.

A flange connection system, including a pair of flange rings each including a neck portion and a radially extending flange portion. The radially extending flange portion includes a distal face including a contact surface that protrudes from a remainder of the distal face. The radially extending flange portion includes a plurality of circumferentially spaced bolt holes extending parallel to a center axis. The distal face including a first seal pocket radially inward of the contact surface and a second seal pocket radially outward of the contact surface, wherein in an assembled condition, the contact surface of the first flange ring is disposed against the contact surface of the second flange ring, a first seal ring is disposed in the first seal pockets, and a second seal ring is disposed in the second seal pockets.