A fluid end, includes a plunger reciprocating within a first bore, the plunger increasing a pressure of a fluid within a pressure chamber. The fluid end also includes a second bore. The fluid end further includes a plug assembly associated with the second bore. The plug assembly includes a plug body positioned within the second bore. The plug assembly also includes a lock ring positioned, at least in part, within the second bore, the lock ring positioned to be driven radially outward responsive to a longitudinal force applied to the plug body.

A heat exchanger assembly including an elongated tubular heat exchanger enclosure defining an interior chamber. A tube sheet is positioned within the interior chamber of the heat exchanger enclosure separating the interior chamber into a shell side and a channel side. The interior portion is configured to removably receive a tube bundle positioned within the shell side of the interior chamber. An annular sleeve member is positioned within the channel side of the interior chamber of the heat exchanger enclosure. An annular elastic torsion member is positioned within the channel side of the interior chamber of the heat exchanger such that the sleeve member is positioned between the tube sheet and the elastic torsion member. The elastic torsion member has an inner circumference deflectable relative to its outer circumference for torsioning the elastic torsion member.

The transmission includes: an open-end cover fitted to an inner circumference of an open end portion of a rotary housing, the cover being configured to close the open end portion; an O-ring provided between the rotary housing and the open-end cover in the compressed state in the axial direction of the rotary housing, the O-ring being configured to seal between the inner circumferential portion of the rotary housing and the outer circumferential portion of the open-end cover; and a snap ring configured to restrict the movement of the open-end cover in the axial direction. The open-end cover is pushed against the snap ring by the repulsive force exerted by the compressed O-ring.

A linkage mechanism is disclosed that produces high travel advantage in one phase of linear actuator motion and high mechanical advantage in another phase of linear actuator motion. The linkage mechanism may be powered by a hydraulic actuator system and is capable of producing high preloads and a high amount of travel with minimal actuator motion or force. The linkage mechanism may be used to secure a hatch door to a pressure vessel housing or may be used in any environment involving high pressure differentials, for example.

A linkage mechanism is disclosed that produces high travel advantage in one phase of linear actuator motion and high mechanical advantage in another phase of linear actuator motion. The linkage mechanism may be powered by a hydraulic actuator system and is capable of producing high preloads and a high amount of travel with minimal actuator motion or force. The linkage mechanism may be used to secure a hatch door to a pressure vessel housing or may be used in any environment involving high pressure differentials, for example.

A method and a system for producing a plastic housing are presented. In a first step, a base body and at least one closure element are produced, and in a second step an elastomer layer is applied by way of at least one gate point using a gating process, the layer joining the base body and the at least one closure element to each other.

A method and a system for producing a plastic housing are presented. In a first step, a base body and at least one closure element are produced, and in a second step an elastomer layer is applied by way of at least one gate point using a gating process, the layer joining the base body and the at least one closure element to each other.

An apparatus for assembling a solid hydrogen storage system includes a lower support installed to support a lower side of material blocks to be assembled, split covers assembled in multiple stages on an upper side of the lower support and forming therein a closed space in which the material blocks are capable of being assembled, the split covers being configured to be separated in a horizontal direction, and gas injection ports provided in the split covers to inject an inert gas into an inner space of the split covers.

An apparatus for assembling a solid hydrogen storage system includes a lower support installed to support a lower side of material blocks to be assembled, split covers assembled in multiple stages on an upper side of the lower support and forming therein a closed space in which the material blocks are capable of being assembled, the split covers being configured to be separated in a horizontal direction, and gas injection ports provided in the split covers to inject an inert gas into an inner space of the split covers.

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.