lever system

lever system

system which has a rigid link (lever) and a fulcrum (or pivot or axis) about which the lever can turn. Can provide increases in force or in range of motion (and velocity) depending on the arrangement of the components and the forces applied. lever arm distance from the fulcrum (or pivot or axis) at which a force is applied. first-class levers have the force and resistance on opposite sides of the fulcrum. second-class levers have the resistance and force on the same side of the fulcrum with the resistance closer to the fulcrum than the force. Very rare in the human body but common in machines (e.g. wheelbarrow). third-class levers have the resistance and force on the same side of the fulcrum with the force closer to the fulcrum than the resistance; very common in the human body (e.g. biceps brachii concentric action in elbow flexion). See also mechanical advantage.
References in periodicals archive ?
And a new model called the XD Pro, which has a unique lever system line release to eliminate pushbutton issues and line hang-ups, plus a rugged, integrated bow-mounting bracket attached to the reel frame.
The necessary tension is provided by a plastic lever system which can be locked.
Dies are manufactured from solid aluminum block and lifted by a triple-knee lever system, driven by a 4-inch air cylinder with variable height control.
The whole body is a pulley and lever system in terms of moving and generating power," explains Robyn.
Other features include three mounting brackets so the Beacon will fit all bows, dual arrow grippers, a quick-detach lever system and the ability to hold any kind of broadhead.
The thorax (not abdomen) of flying insects is set up in such a way that a very small movement of a muscle is magnified through a thoracic, flexible, lever system that makes the wings move a large distance with hardly any change in muscle length," Mussen said.
maenas were larger and exhibited higher mechanical advantage values of the claw lever system than C.
The Winlock five lever system uses tried and tested traditional lever design combined with modern state-of-the-art technology.
Dies are manufactured in Rollstock's facility from solid aluminum block and lifted by a triple knee lever system, driven by a four inch air cylinder with variable height control.
Trudeau's Trulever Elite has a patented corkscrew lever system that moves closely along the body as you hold the bottle and corkscrew together for an added sense of security.
DISABLED British biker Philip Tucker, who has only one leg, has invented a highly versatile lever system that will enable motorcyclists suffering from a disabled right or left arm, or right leg, to stay on two wheels.
This model also features quite prominently, for the extraction process, a patented lever system that gives the operator a traditional espresso 'feel' even with the simplicity of using pods.