Hinge Hinge A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation: all other translations or rotations being prevented, and thus a hinge has one degree of freedom. Hinges may be made of flexible material or of moving components. In biology, many joints function as hinges like the elbow joint. There are many types of door hinges. The main types include: Other types include: Since at least medieval times there have been
Motorcycle saddle Motorcycle saddle A motorcycle saddle is a term for a motorcycle seat in some parts of the world. It is a seat for carrying a rider and, possibly, a passenger, and which is attached to a motorcycle often but not exclusively, behind the fuel tank. There are several types of saddles used on motorcycles. Most common is the "dual saddle" or "benchseat" which is used on the majority of motorcycles today. It allows both the rider and passenger to be seating fore and aft on a single saddle. Dual saddles, that is two separate saddles (and often independently sprung), are