Locking Gas Springs
Locking gas springs may be employed as safety mechanisms as well. They provide added support to springs under extreme pressure as well as secure closing and sealing of sensitive compartments. Marine, automotive, shipping, furniture, medical and aerospace industries frequently make use of these devices, which may stop motion in either the fully extended or fully compressed position of both compression and
tension gas springs. Additionally, adjustable
gas springs may have several intermediary stopping positions; some have denoted points while others may be locked at any point along the stroke. It is important to consider the specific locking feature and capabilities of a gas spring before purchasing as they may vary widely. The locking force is of utmost concern and must be taken into account with regards for any incidental pressure that may be placed on the spring. Exceeding this predetermined force may lead to failure of the locking mechanism and gas spring. The basic design of locking type gas springs is similar to basic models.
The main body is a hollow cylinder made of durable materials such as
stainless steel, steel, aluminum or
thermoplastic that boasts a micro-smooth finish. This unit houses a piston head which, with the help of surrounding o-rings and seals, divides the chamber into two airtight compartments. The piston head is attached to a rod that protrudes out of the cylinder connecting to the working mechanism. Inlet and outlet valves may be found in either end of the cylinder and are attached to a gas charge reservoir. While tension and compressions springs operate in opposition to one another, the introduction and release of pressurized air is responsible for absorbing energy and reducing motion in both types. The locking mechanism is either included in the aforementioned valve system or may be an additional component such as a pin or plunger that connects to or impedes the movement of the piston rod. There are two main types of locking gas springs: Flexible and rigid. As the names would suggest, the former allows some room for give. This type is commonly used in adjustable seating or other applications in which a slight bounce of energy absorbed is acceptable. In springs where positioning must be absolute, however, rigid locking springs eliminate this elasticity and maintain firm piston positioning under shock or force.
