An emergency entry control system which is particularly adaptable for use with double panic doors typically found in schools, movie theaters, and other public facilities. The system includes a base, connecting bracket, and engagement means designed to be removably secured to the top latching mechanism and/or bottom latching mechanism of a conventional double panic door configuration to prevent double panic doors without a center bar from being opened from the outside. The system is rotated manually to permit the panic doors to operate normally. The system can also be modified with wireless and audio technology to effectuate audible and visual notification and facilitate location and communication during emergency situations like an unauthorized attempt at entry or removal of the system.

Described are a load restraining apparatus that can facilitate performing controlled falls of unsecured freight that may be leaning against swing doors of a trailer. The described load restraining apparatus includes a first member, a second member, a third member, and a linking assembly that facilitates performing a controlled fall of unsecured freight leaning on swing doors of a trailer from a safe distance.

Described are a load restraining apparatus that can facilitate performing controlled falls of unsecured freight that may be leaning against swing doors of a trailer. The described load restraining apparatus includes a first member, a second member, a third member, and a linking assembly that facilitates performing a controlled fall of unsecured freight leaning on swing doors of a trailer from a safe distance.

A cable release system configured to unlock a hold open rod mechanism or latch mechanism includes an actuator having a handle and a cable attachment. The cable release system also includes a cable connected at one end to the actuator and at another end to an unlocking mechanism associated with the hold open rod mechanism or the latch mechanism. The cable release system also includes the actuator being configured to move the cable and operate the unlocking mechanism associated with the hold open rod mechanism or the latch mechanism. The cable release system also includes the actuator and the handle being configured to be moved by personnel to move the cable and operate the unlocking mechanism associated with the hold open rod mechanism or the latch mechanism. The cable release system also includes the cable attachment including a lower slide and a release slide.

A hydraulic lock for a hydraulic system includes a flow control valve and a second check valve. The flow control valve having a first inlet, a first outlet, a first check valve and a flow restrictor, each of the first check valve and the flow restrictor being communicably coupled to the first inlet and the first outlet and being arranged in parallel between the first inlet and the first outlet. The second check valve having a second inlet and a second outlet, the second inlet being communicably coupled to the first outlet, the second check valve further having a ball seating surface having an aperture there through, a ball, and a resilient member biasing the ball towards the ball seating surface to seal the aperture, the aperture being communicably coupled to the second inlet and the second outlet.

A cable release system configured to unlock a hold open rod mechanism or latch mechanism includes an actuator having a handle and a cable attachment. The cable release system also includes a cable connected at one end to the actuator and at another end to an unlocking mechanism associated with the hold open rod mechanism or the latch mechanism. The cable release system also includes the actuator being configured to move the cable and operate the unlocking mechanism associated with the hold open rod mechanism or the latch mechanism. The cable release system also includes the actuator and the handle being configured to be moved by personnel to move the cable and operate the unlocking mechanism associated with the hold open rod mechanism or the latch mechanism. The cable release system also includes the cable attachment including a lower slide and a release slide.

A hydraulic lock for a hydraulic system includes a flow control valve and a second check valve. The flow control valve having a first inlet, a first outlet, a first check valve and a flow restrictor, each of the first check valve and the flow restrictor being communicably coupled to the first inlet and the first outlet and being arranged in parallel between the first inlet and the first outlet. The second check valve having a second inlet and a second outlet, the second inlet being communicably coupled to the first outlet, the second check valve further having a ball seating surface having an aperture there through, a ball, and a resilient member biasing the ball towards the ball seating surface to seal the aperture, the aperture being communicably coupled to the second inlet and the second outlet.

A remote-released door stop activated by specific sound is disclosed. With a remote detection device mounted on the door or elsewhere, a receiver can distinguish an alarm and release the door automatically to achieve closure for fire integrity and intruder prevention.

A ball-lock type fastening device for connecting a work piece to a structure is disclosed. The fastening device includes a number of features designed to improve the reliability, repeatability and strength of the locking mechanism compared to traditional ball-lock fasteners. The features include the shape of the locking balls, the shape of the retention housing which engages the locking balls, and mechanisms for controlling deployment and retraction of the locking balls.

A ball-lock type fastening device for connecting a work piece to a structure is disclosed. The fastening device includes a number of features designed to improve the reliability, repeatability and strength of the locking mechanism compared to traditional ball-lock fasteners. The features include the shape of the locking balls, the shape of the retention housing which engages the locking balls, and mechanisms for controlling deployment and retraction of the locking balls.