A structure (10) comprising two shell parts (20, 30) which are connected to each other with at least one snap connection (21), wherein the two shell parts comprise, on the inner side, mutually complementary male and female snap means (25, 35) configured to form a snap connection (21), and wherein the two shell parts have complementarily configured abutment faces that abut on each other when the male and female snap means are interconnected (25, 35); wherein the male and female snap means (25, 35) comprise an external spiral-shaped protrusion (24) configured on the male snap means, and a thereto complementarily configured, internal, spiral-shaped protrusion (34) configured on the female snap means; and wherein the external spiral-shaped protrusion (24) on the male snap means (25) is configured such that it engages with the internal spiral-shaped protrusion (34) on the female snap means (35); and that the structure (10) comprises rotation-preventive means configured such that the two shell parts are unable to rotate relative to each other when the male and female snap means are interconnected to form at least one snap connection (21).

Headgear for a respiratory mask includes a strap arrangement including front strap portions adapted to be disposed over a patient's cheeks and having front ends adapted for attachment to an airway interfacing portion, top strap portions connected to respective front strap portions and adapted to be disposed over the top of a patient's head and to connect to each other, and a back strap extending rearwardly from and connecting respective junctions of the front strap portions and top strap portions or regions adjacent these junctions and adapted to locate underneath a patient's occiput. In use with a patient having long hair, the back strap is adapted to extend under the patient's hair and urge upwardly on the patient's hair and against the patient's head beneath the occiput. In use with a patient having short hair, the back strap is adapted to urge against the patient's head beneath the occiput. In an embodiment, front strap portions of the headgear may be provided with a sleeve or cover (e.g., constructed of a fleece material) to enhance comfort in use.

Headgear for a respiratory mask includes a strap arrangement including front strap portions adapted to be disposed over a patient's cheeks and having front ends adapted for attachment to an airway interfacing portion. The strap arrangement may also include top strap portions connected to respective front strap portions and adapted to be disposed over the top of a patient's head and to connect to each other. Further, a back strap may extend from and connect respective junctions of the front strap portions and top strap portions or regions adjacent these junctions. The front strap portions may be provided with a sleeve or cover to enhance comfort in use.

Headgear for a respiratory mask includes a strap arrangement including front strap portions adapted to be disposed over a patient's cheeks and having front ends adapted for attachment to an airway interfacing portion, top strap portions connected to respective front strap portions and adapted to be disposed over the top of a patient's head and to connect to each other, and a back strap extending rearwardly from and connecting respective junctions of the front strap portions and top strap portions or regions adjacent these junctions and adapted to locate underneath a patient's occiput. In use with a patient having long hair, the back strap is adapted to extend under the patient's hair and urge upwardly on the patient's hair and against the patient's head beneath the occiput. In use with a patient having short hair, the back strap is adapted to urge against the patient's head beneath the occiput. In an embodiment, front strap portions of the headgear may be provided with a sleeve or cover (e.g., constructed of a fleece material) to enhance comfort in use.

Headgear for a respiratory mask includes a strap arrangement including front strap portions adapted to be disposed over a patient's cheeks and having front ends adapted for attachment to an airway interfacing portion. The strap arrangement may also include top strap portions connected to respective front strap portions and adapted to be disposed over the top of a patient's head and to connect to each other. Further, a back strap may extend from and connect respective junctions of the front strap portions and top strap portions or regions adjacent these junctions. The front strap portions may be provided with a sleeve or cover to enhance comfort in use.

A hitch system is described for coupling an object to a vehicle hitch. The hitch system can have a connector adapted to connect to a vehicle hitch having a connector channel that passes through the connector and has an internal threaded section; a lock rod having, a first section wherein at least a portion of the first section is threaded wherein the internal threaded section of the connector are adapted to receive the threads of the first section of the lock rod and a second section; and a locking member having a first locking member channel having an inside diameter and an outside diameter wherein the inside diameter of the locking member channel is smaller than the diameter of the second section and a lock to move between a locked position and an opened position wherein the second section of the lock rod is secured to the locking member when the second section is disposed within the locking member channel and the lock is in the locked position and is removable when the lock is in the opened position.

Headgear for a respiratory mask includes a strap arrangement including front strap portions adapted to be disposed over a patient's cheeks and having front ends adapted for attachment to an airway interfacing portion, top strap portions connected to respective front strap portions and adapted to be disposed over the top of a patient's head and to connect to each other, and a back strap extending rearwardly from and connecting respective junctions of the front strap portions and top strap portions or regions adjacent these junctions and adapted to locate underneath a patient's occiput. In use with a patient having long hair, the back strap is adapted to extend under the patient's hair and urge upwardly on the patient's hair and against the patient's head beneath the occiput. In use with a patient having short hair, the back strap is adapted to urge against the patient's head beneath the occiput. In an embodiment, front strap portions of the headgear may be provided with a sleeve or cover (e.g., constructed of a fleece material) to enhance comfort in use.

A structure comprising two shell parts connected to each other with at least one snap connection, the two shell parts comprising, on the inner side, mutually complementary male and female snap means configured to form a snap connection, and complementarily configured abutment faces that abut on each other when the male and female snap means are interconnected. The male and female snap means comprise an external spiral-shaped protrusion configured on the male snap means, and a complementarily configured, internal, spiral-shaped protrusion configured on the female snap means configured to engage. The structure comprises rotation-preventive means configured such that the two shell parts are unable to rotate relative to each other when the male and female snap means are interconnected to form at least one snap connection.

Headgear for a respiratory mask includes a strap arrangement including front strap portions adapted to be disposed over a patient's cheeks and having front ends adapted for attachment to an airway interfacing portion, top strap portions connected to respective front strap portions and adapted to be disposed over the top of a patient's head and to connect to each other, and a back strap extending rearwardly from and connecting respective junctions of the front strap portions and top strap portions or regions adjacent these junctions and adapted to locate underneath a patient's occiput. In use with a patient having long hair, the back strap is adapted to extend under the patient's hair and urge upwardly on the patient's hair and against the patient's head beneath the occiput. In use with a patient having short hair, the back strap is adapted to urge against the patient's head beneath the occiput. In an embodiment, front strap portions of the headgear may be provided with a sleeve or cover (e.g., constructed of a fleece material) to enhance comfort in use.

A hitch system is described for coupling an object to a vehicle hitch. The hitch system can have a connector adapted to connect to a vehicle hitch having a connector channel that passes through the connector and has an internal threaded section; a lock rod having, a first section wherein at least a portion of the first section is threaded wherein the internal threaded section of the connector are adapted to receive the threads of the first section of the lock rod and a second section; and a locking member having a first locking member channel having an inside diameter and an outside diameter wherein the inside diameter of the locking member channel is smaller than the diameter of the second section and a lock to move between a locked position and an opened position wherein the second section of the lock rod is secured to the locking member when the second section is disposed within the locking member channel and the lock is in the locked position and is removable when the lock is in the opened position.