A closure for a pressure vessel that includes a neck with a groove defined in the inner diameter, and a door assembly that pivots between opened and closed positions. The door assembly includes a door portion sized to be received in an opening of the neck, a guide plate connected to the door portion and rotatable between locked and unlocked positions, a first lock ring segment positioned radially outwardly of the guide plate and a handle. The guide plate includes a first cam path defined therein that receives a cam member of a first lug assembly that extends inwardly from the first lock ring segment. Rotation of the handle (and guide plate) from the unlocked to the locked position moves the first lock ring segment from a locked to an unlocked position. In the locked position, the first lock ring segment is received in the groove of the neck.

A printer management system includes one or more printing devices having a printing area for printing according to a digital file, an access area through which a user may access the printing area, and a locking mechanism configured to lock the access area preventing access to the printing area. A management server is communicatively coupled to the one or more printing devices over a communication network and is configured to receive a print request from one or more user devices or one of the one or more printing devices to print the digital file, transmit the digital file to one of the one or more printing devices, and transmit commands to lock and unlock the locking mechanism of the one or more printing devices. In one embodiment the management system is configured to update a printing status of each of the one or more printing devices.

An electronic device includes a first unit, a second unit, and a lock mechanism. The lock mechanism includes: an engagement projection provided on a third side surface of the first unit; a latch provided on a fourth side surface of the second unit, the latch being rotatable around a rotation axis provided perpendicular to the fourth side surface between a first rotational position where the latch does not engage with the engagement projection and a second rotational position where the latch is engageable with the engagement projection, and an urging member that urges the latch to be positioned at the second rotational position. The latch has an inclined part. When the latch is located at the second rotational position and the first unit is changed to a closed state from a state where the first unit is not closed, the inclined part abuts on the engagement projection during the change.

A molded access door assembly for an access opening in a wall or ceiling is provided. It includes a molded frame with a frame channel forming the outside of the access door assembly. The frame channel has spaced apart exterior and interior walls joined at the top edge by a top wall and a lip extending from the bottom edge of the inner wall into the interior of the molded access door assembly to define an opening. The lip provides a stop rest for the door in the closed position so that the door is capable of being attached to the wall or ceiling. The assembly also includes a door having a top surface and a first part of a hinge assembly along one edge of the top surface which cooperates with a matching second part of the hinge assembly along one edge of the frame channel to allow the door to move between an open and a closed position.

An unlocking device with an actuator releases a safety cover of a maintenance opening for opening. The locking device has a safety circuit for actuating the actuator. The safety circuit includes at least one first switching contact and a second switching contact arranged in series, wherein the actuator in a closed state of the first and the second switching contacts is connected by the safety circuit with a power source, and the first switching contact can be switched by a control unit. One or more of the unlocking device can be used in an elevator system.

A locking mechanism for a tank body and a tank cover of a pressure tank. The locking mechanism includes: a tank body, a tank chamber, a tank cover, a hydraulic cylinder, a locking ring, a spring cylinder, a fixing supporting mechanism, a fixing plate, a barb, a notch, and a pulling cylinder.

A bear-resistant waste disposal container comprises a bin, a handle, and a lid rotatably connected to the handle. A bin collar surrounds an upper perimeter of the bin, and a lid collar surrounds an outer perimeter of the lid. A picket extends upwardly from inside the bin, through an aperture in the lid, and through an aperture in a lid frame. A carabiner or other locking device is removably insertable through an opening in the upper portion of the picket to lock the lid in a closed position.

Described herein is locking apparatus, method for making a locking apparatus, and method for mounting a locking apparatus to the door of a personal storage container. The locking apparatus may include a threaded portion having deformed threads and a lock body shape to fit a restrictive mounting hole.

A phone cover with rotary latch including a first frame, a second frame, a limiting piece, and limiting grooves is provided. The first frame and the second frame are separated structures. A limiting hole and a positioning post are configured at the frame connecting ends disposed at the two sides of the first frame respectively. A limiting post and a positioning post are configured at the frame connecting ends disposed at the two sides of the second frame. A positioning hole is disposed in middle of the limiting piece, limiting protrusions are disposed in two ends of the limiting piece. The limiting hole is disposed corresponding to the limiting post, and the limiting post is embedded in the limiting hole. Limiting grooves are disposed at one connecting end of the first frame and one connecting end of the second frame respectively, and each limiting groove is configured with the limiting protrusion.

An assembly can include a chassis that includes a chamber and an opening; a cover movable for access to the chamber via the opening; a cover latch; and a cover latch release that includes a push panel operatively coupled via a linkage to a pull panel that includes a finger grip surface, where the linkage rotates the pull panel responsive to rotation of the push panel to expose the finger grip surface, and where further rotation of the pull panel releases the cover latch.