A pet cage, including: a first lateral part, a second lateral part including a horizontal rod, and a connecting structure. The connecting structure includes a plurality of vertical rods. Each vertical rod includes an end including a swivel hook. The swivel hook includes: a front section, a middle section, and a rear section. The first lateral part and the second lateral part are adjacent to each other, and the connecting structure is disposed therebetween to connect the first lateral part and the second lateral part. The plurality of vertical rods is disposed on the first lateral part. The swivel hook is disposed at the end of each vertical rod and adapted to encircle the horizontal rod of the second lateral part. The angle between the rear section and the vertical rod of the first lateral part is between 80 and 100.

A pet cage, including: a first lateral part, a second lateral part including a horizontal rod, and a connecting structure. The connecting structure includes a plurality of vertical rods. Each vertical rod includes an end including a swivel hook. The swivel hook includes: a front section, a middle section, and a rear section. The first lateral part and the second lateral part are adjacent to each other, and the connecting structure is disposed therebetween to connect the first lateral part and the second lateral part. The plurality of vertical rods is disposed on the first lateral part. The swivel hook is disposed at the end of each vertical rod and adapted to encircle the horizontal rod of the second lateral part. The angle between the rear section and the vertical rod of the first lateral part is between 80 and 100.

An apparatus includes a guide member configured with stress limiting features which function to prevent the stress from bending the guide member causing ovalization of the guide member. An apparatus for bending a guide member includes a ram die and a pressure die which are configured to fully encircle the portion of the guide member during the bending operation. A fixture for supporting a guide member during bending is configured to fully encircle sections of the guide member during bending.

A machine for bending a thread-like material such as a pipe, a section iron, a bar, or the like, briefly a pipe, provided with a system for simultaneously loading a pipe to be bent and unloading another, already bent pipe, comprising a vertical hinge provided with a bending head provided with a motor for driving the bending head into rotation about an axis orthogonal to the hinge.

A machine for bending a thread-like material such as a pipe, a section iron, a bar, or the like, briefly a pipe, provided with a system for simultaneously loading a pipe to be bent and unloading another, already bent pipe, comprising a vertical hinge provided with a bending head provided with a motor for driving the bending head into rotation about an axis orthogonal to the hinge.

A method of manufacturing a double-walled elbow pipe segment, comprising the steps of: (a) providing an inner pipe member; (b) providing at least one first support member, and positioning said at least one first support member coaxially over said inner pipe member; (c) providing an outer pipe member and slidably positioning said assembled inner pipe member and said at least one first support member within said outer pipe member such that said at least one first support member is supportingly engaged with an outer surface of said inner pipe member and an inner surface of said outer pipe member, and (d) bending a pipe assembly of said inner pipe member, said at least one first support member and said outer pipe member into at least one first elbow section of a predetermined first angle and in a predetermined first direction between an upstream end portion and a downstream end portion of said pipe assembly.

A method of manufacturing a double-walled elbow pipe segment, comprising the steps of: (a) providing an inner pipe member; (b) providing at least one first support member, and positioning said at least one first support member coaxially over said inner pipe member; (c) providing an outer pipe member and slidably positioning said assembled inner pipe member and said at least one first support member within said outer pipe member such that said at least one first support member is supportingly engaged with an outer surface of said inner pipe member and an inner surface of said outer pipe member, and (d) bending a pipe assembly of said inner pipe member, said at least one first support member and said outer pipe member into at least one first elbow section of a predetermined first angle and in a predetermined first direction between an upstream end portion and a downstream end portion of said pipe assembly.

A method for forming a metal beam may comprise: clamping first and second portions of the metal beam in a substantially fixed and in a position whereat the metal beam is rotatable about three axes; applying a net bending force to the clamped second portion of the metal beam at a predetermined angle; sensing twisting of the second portion of the metal beam resulting from the net bending force; and modulating the angle at which the net force is applied to reduce the twisting of the metal beam. As a result, the net bending force is moved toward the shear center and toward being along the principal axis of the metal beam.

A method for forming a metal beam may comprise: clamping first and second portions of the metal beam in a substantially fixed and in a position whereat the metal beam is rotatable about three axes; applying a net bending force to the clamped second portion of the metal beam at a predetermined angle; sensing twisting of the second portion of the metal beam resulting from the net bending force; and modulating the angle at which the net force is applied to reduce the twisting of the metal beam. As a result, the net bending force is moved toward the shear center and toward being along the principal axis of the metal beam.

An apparatus for bending metal beams and methods of using the same are provided herein.