22results about "Trap doors" patented technology

The invention relates to the technical field of push-pull type hangar gates, in particular to a push-pull type hangar gate and a gate mounting construction method.The push-pull type hangar gate comprises an upper mounting frame and a lower mounting frame, and a set of movable door plates, a set of limiting door plates and a plurality of sets of splicing door plates are slidably mounted in the upper mounting frame and the lower mounting frame; the two sides of each splicing door plate can be in butt joint with the corresponding movable door plate and the corresponding limiting door plate, a driving part is installed at the front end of the lower installation frame and can push the corresponding movable door plate to move, the two splicing door plates can be automatically spliced, and the two splicing door plates can be manually disassembled to be opened. The driving part and the movable door plate can be quickly mounted, so that the sliding door can be conveniently and electrically pushed, the labor burden is reduced, the pushing efficiency is improved, any two groups of spliced door plates can be conveniently opened, entrances of different sizes can be conveniently opened in a hangar, and convenience, rapidness and time saving are achieved.

Corner assembly (G) of an outer frame (T) of a trapdoor (B); the corner assembly (G) comprises a corner piece (100), a device (7) attached to the corner piece (100) and screws (81, 82) used to fix the device (7) to the corner piece (100); the corner piece (100) has a protective partition (41, 42, 43) suitable for creating a compartment (V1, V2) that accommodates the tips (811, 821) of the screws (81, 82) and prevents the user from accidentally inserting his / her fingers inside the compartment (V1, V2).

To provide an escape hatch that is lightweight and whose height can be adjusted according to the thickness of the slab on which it is installed, and a method for installing the same. [Solution] An escape hatch comprising an upper frame positioned on the upper surface side of a slab, an upper lid connected to the upper frame so as to be openable and closable, a lower frame facing the upper frame from the lower side, a lower lid connected to the lower frame so as to be openable and closable, and an adjustment mechanism for holding the upper frame and the lower frame in a separated state, wherein the separation distance between the upper frame and the lower frame is adjusted by the adjustment mechanism.

An attic hatch system for mounting within an attic access conduit defined by a ceiling, has an attic hatch structured to mount within the attic access conduit, the attic hatch comprising an insulative hatch body; one or more hanger parts structured to support the attic hatch within the attic access conduit in use, with each of the one or more hanger parts comprising: a top flange member extended laterally outward from the insulative hatch body to extend over and secure on a top shoulder of a structural member of the ceiling in use; a skirt structured to depend from the top flange member through the attic access conduit in use; and a base flange member extended laterally inward from the skirt to define a seat that supports a base surface of the attic hatch.

A loft door frame 10, a loft door assembly 1 and a building having an internal ceiling including a loft door frame are disclosed. The lost hatch frame 10 comprises a first section 11 extending in a fi

The application discloses a rotary valve mechanism of a switch cabinet, and belongs to the technical field of valve mechanisms of switch cabinets. The valve mechanism comprises an upper metal valve and a lower metal valve, the outer side of the upper metal valve and the outer side of the lower metal valve are respectively fixed with an upper insulating valve plate and a lower insulating valve plate for shielding a static contact, further comprising a sliding groove plate for driving the upper metal valve and the lower metal valve to rotate and open, and a connecting rod mechanism for driving the sliding groove plate to move upwards. The valve mechanism adopts a single connecting rod and a shaft sleeve cooperation driving mode, and has the advantages of simple structure, convenient installation and reliable interlocking. The connecting rod mechanism is used for driving the sliding groove plate to move upwards, the rotary motion of the valve is converted, the static contact is exposed, and a tension spring is used for automatic resetting. The valve assembly composed of the upper and lower insulating valve plates and the upper and lower metal valves can effectively utilize the space of a handcart room of the switch cabinet, save materials, reduce cost, improve the insulation performance of the switch cabinet, and increase the reliability and safety of the switch equipment in operation.

A system is provided for safe access to a roof through an opening in a roof of a structure having a fixed ladder leading upward to the opening. The system includes a mechanism to drive a set of pushrods to raise a hatch covering the opening. The system may include a section of ladder secured to the underside of the hatch. The system may have an extendable ladder driven by the drive mechanism to slide along the fixed ladder and extend through the opening in the roof when the hatch is raised. The system may include a safety pole driven by the drive mechanism to extend through the opening in the roof when the hatch is raised. The system allows someone who needs to access the roof for inspection or maintenance to safely open the hatch, climb up through the opening in the roof, and safely step onto the roof.

A method of manufacturing a frame for an access panel, the access panel comprising a door disposed within the frame, is disclosed. The method comprises providing a frame blank including a frame opening having first and second opposing sides, cutting the frame blank to form cuts into the frame blank at opposing ends of each of the first opposing sides, the cuts forming first and second bend lines, bending the frame blank along each of the bend lines to form first and second generally upright flanges, providing first and second generally L-shaped inserts, each having an upright portion and a flange portion and securing the generally L-shaped inserts to the frame blank such that the upright portion of the L-shaped inserts extend between the first and second upright flanges of the frame blank.

A retractable cover for an automotive service pit allowing an auto technician to utilize a retractable cover and mobile oil drain attachment to successfully collect oil from an automotive oil pan as well as provide repair and replacement of vehicle parts while providing a protective cover over an open automotive pit. Too, the present invention allows for a quick release mechanism, in the form of a detent pin, internal or external to said service pit, which allows an automotive technician to quickly and easily release the present pit cover when in need of a rapid service pit cover release for service person's entrance or egress.

Insulated ceiling access doors have a two-part tongue and slot hinge. The doors are made of two interlock pans that are filled with injected polyurethane foam. The doors vary in length, width and thickness. The doors are mounted in ceiling access door frames. Four-part side and end walls insulation dams are permanently mounted above the door frames for holding back insulation from falling downward within the attic area. The doors have hold-open hardware.

Access panel (100) comprising a fixed frame (1) suitable for being fixed into an opening provided in a wall or a ceiling behind which a compartment is disposed; said fixed frame (1) has a front section (1a), a rear section (1b) and two lateral sections (1c, 1d); said access panel (100) further comprises a door (2) mounted on the fixed frame (1) comprising two lateral appendages (3) in coaxial position and suitable for resting on the fixed frame (1) to hang the hinged door (2) to the fixed frame (1) and move the door (2) between a closed position and an open position, and locking means (71, 72) to lock the door (2) in closed position; for each lateral appendage (3), the access panel (100) comprises a travel-stop bracket (5) suitable for stopping a travel of the lateral appendage (3) of the door (2) toward the front section (1a) of the fixed frame (1) when the door (2) is in open position.

INSPECTION PANEL WITH A MONOLITHIC STRUCTURE The invention relates to an inspection panel comprising a fixed frame (1) adapted to be fixed to a wall corresponding to an opening in said wall, and a movable frame (2) adapted to rotate within the fixed frame (1) to alternately impose the open and closed positions on said inspection panel; the fixed frame (1) and the movable frame (2) having a monolithic structure obtained by molding suitable plastic materials. Figure to be published with the abstract: Figure 4

A box structure building partition constructed out of box designed to be installed in a building partition, articulated relative to box closing hatch, wherein the box structure features a closing hatch locking mechanism in the box and closing hatch features bracket in closing hatch socket for unlocking the locking mechanism, wherein bracket assumes two extreme positions in closing hatch, so that bracket in the first extreme position is retracted into closing hatch and the locking mechanism is locked and in the second extreme position bracket is slid out from closing hatch and the locking mechanism is unlocked and the bracket features a coupling for coupling element, accessible for a user when bracket is not in its first extreme position.

The utility model discloses an unattended transformer station security protection device and system, and relates to the technical field of security protection, the transformer station security protection device comprises a push-pull steel plate door, a fixing module, a processor and a protection module, the processor is used for receiving station entering and exiting information of a transformer station, determining first control information of a push-and-pull steel plate door and second control information of a protection module according to the in-and-out information, and controlling the push-and-pull steel plate door to operate based on the first control information and the protection module to operate based on the second control information so as to guarantee the safety of the transformer substation; wherein the push-pull steel plate door is made of a non-perspective material, the protection module is in a protection state when the second control information is not received, and the protection state is used for preventing dangerous moving objects from entering the transformer substation. The transformer station security equipment can effectively guarantee the privacy of the transformer station, improves the automation degree of the security task of the transformer station, is high in practicality, and can be suitable for unattended transformer stations.

A box construction lock with a strike plate assembly is provided. The box construction lock includes a locking mechanism with a locking latch-bolt, located in a lock housing, so that in the lock locked position, the locking latch-bolt is at least partially in the strike plate assembly, and there is adjustment range between the lock housing and the locking mechanism of the lock housing, so that the lock housing has at least two positions relative to the locking mechanism.

A transverse propulsion device (1) for a vessel (2) includes a propulsion channel (3) defined in a hull (4) of the vessel (2) and adapted to accommodate at least one motorized propeller (5); the propulsion channel (3) is defined by a channel wall (6) extending between a first channel inlet (7) and an opposing second channel inlet (8); at least one coupling (9) extending from the channel wall (6) at at least one channel inlet (7, 8); at least one support structure (10) including at least one mating coupling (27); the support structure (10) being detachably connected to the at least one coupling via its at least one mating coupling (27). The transverse propulsion device (1) further includes at least two closing doors (12) configured such that when the closing doors are in the closed position, at least one passage entrance (7, 8) is completely closed; wherein at least one support structure (10) includes a hinge (11); and wherein the at least two closing doors (12) are rotatably hinged to the hinge (11) of the support structure (10) such that when the at least one mating connector (27) of the support structure (10) is separated from the at least one connector (9), the closing door (12) is separated from the motor passage (3) together with the support structure (10), thereby allowing access to the motor passage (3).

The lateral propulsion device 1 for a ship 2 comprises a steering tunnel 3 defined in a hull 4 of the ship 2 and configured to include a steering propeller 5. The steering tunnel 3 is bounded by a tunnel wall 6 extending between a first tunnel entrance 7 and a second tunnel entrance 8. The device comprises a support structure 10 including a counter joint 27. The support structure 10 is separably connected to the joint 9 at the counter joint 27. The lateral propulsion device 1 further comprises at least two closure doors 12 configured to collectively close the tunnel entrances 7, 8 when in a closed position. The support structure 10 includes a hinge 11. The closure doors 12 are rotatably hinged only to the hinge 11 of the support structure 10 such that when the counter joint 27 of the support structure 10 is separated from the joint 9, the closure doors 12 together with the support structure 10 are separated from the steering tunnel 3 to allow access to the steering tunnel 3.

The utility model aims to provide a double-opening type pet door which comprises a connecting frame, the connecting frame is connected with a movable door through a hinge, the pet door capable of being turned up and down is arranged in the movable door, a pet lock pin is further arranged on the movable door, and the pet lock pin can limit one-way opening of the pet door. The movable door is formed by connecting an upper movable door and a lower movable door through section bars, and the upper movable door and the lower movable door are respectively provided with visual windows; by means of the height adjusting system, the height of the movable door can be adjusted, the movable door can be matched with different door frames, installation is convenient, an original door does not need to be modified, safety is enhanced through the lock button and the connecting movable lock, a product can be better used, the pet lock pin controls the pet door to be opened in a one-way mode, and a pet is prevented from getting out by mistake; and the double-opening type design is combined with the visual window, so that the integrated use of people and pets is realized, and the condition of the pets is convenient to observe.

To provide a vessel lateral propulsion unit capable of reducing eddy resistance and friction generated during sailing and facilitating access during maintenance.SOLUTION: A lateral propulsion unit 1 is defined in a hull 4 of a vessel 2 and configured to include a steering propeller in a steering tunnel 3. The steering tunnel has a boundary defined by a tunnel wall extending between a first tunnel entrance 7 and a second tunnel entrance, and has a support structure 10 that includes a counter joint 27. The support structure is separably connected to a joint 9 by the counter joint. The lateral propulsion unit 1 further comprises at least two closing doors 12 formed to close the entire tunnel entrances. The support structure includes hinges 11. The closing doors 12 are rotatably fixed only to the hinges of the support structure. When the counter joint of the support structure is separated from the joint, the closing doors are separated together with the support structure from the steering tunnel, thus enabling access to the steering tunnel.SELECTED DRAWING: Figure 17