Abstract: A stay damper comprises a cylinder (1) in which a gas is charged, a piston rod (2) which projects under a pressure of the gas in the cylinder (1), and a stopper (10) which locks contraction of the piston rod (2) in an elongated position. The stopper (10) displaces between a lock position which locks contraction of the piston rod (2) and a release position which permits contraction of the piston rod (2) according to directional operation forces applied by an operator. The stopper (10) comprises a restricting member (12, 13) which holds the stopper (10) in the lock position when it is in the lock position and holds the stopper (10) in the release position when it is in the release position. Since the locking operation of the stopper (10) is performed manually, the releasing operation thereof is easily understood by the operator.

Abstract: A gas spring (1) comprises a piston rod (4) projecting from an open end of a cylinder (2) so as to be able to elongate and contract axially, and a dust seal (10) which is in contact with the piston rod (4) to prevent dust from invading the cylinder (2). By fitting a seal protecting member (21) to the open end of the cylinder (2) to shield the dust seal (10) from exposure to the outside of the cylinder (2), protection of the dust seal (10) from deterioration and damage is enhanced.

Abstract: A gas spring (1) comprises a piston rod (4) projecting from an open end of a cylinder (2) so as to be able to elongate and contract axially, and a dust seal (10) which is in contact with the piston rod (4) to prevent dust from invading the cylinder (2). By fitting a seal protecting member (21) to the open end of the cylinder (2) to shield the dust seal (10) from exposure to the outside of the cylinder (2), protection of the dust seal (10) from deterioration and damage is enhanced.

Abstract: A stay damper comprises a cylinder (1) in which a gas is charged, a piston rod (2) which projects under a pressure of the gas in the cylinder (1), and a stopper (10) which locks contraction of the piston rod (2) in an elongated position. The stopper (10) displaces between a lock position which locks contraction of the piston rod (2) and a release position which permits contraction of the piston rod (2) according to directional operation forces applied by an operator. The stopper (10) comprises a restricting member (12, 13) which holds the stopper (10) in the lock position when it is in the lock position and holds the stopper (10) in the release position when it is in the release position. Since the locking operation of the stopper (10) is performed manually, the releasing operation thereof is easily understood by the operator.