42results about "Trap doors" patented technology

Disclosed is a corner assembly of an outer frame of a trapdoor. The corner assembly includes a corner piece, a device attached to the corner piece and screws used to fix the device to the corner piece. The corner piece has a protective partition suitable for creating a compartment that accommodates the tips of the screws and prevents the user from accidentally inserting his / her fingers inside the compartment.

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.

An improved inspection trapdoor comprising: a fixed frame (TF), a movable frame (TM), a panel connected to the movable frame (TM), and connecting means (5, 6) for connecting the movable frame (TM) to the fixed frame (TF); wherein at least one of the frames (TM, TF) comprises at least three parts (1, 2), the ends (11, 21) of which are cut at 90 DEG, and at least three corner fittings (3, 4), each corner fitting connecting two adjacent parts (1, 2) in a transversely arranged arrangement; the corner fitting (3, 4) comprising a central portion (30, 40) adapted to abut against the ends (11, 21) of two adjacent components (1, 2) and two side inserts (31, 41) projecting from the central portion (30, 40) so as to couple with the components (1, 2); wherein the central portions (30, 40) of the corner pieces (3, 4) and the side inserts (31, 41) are made integrally.

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).

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

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 utility model discloses an anti-collision cabinet door structure which comprises a cabinet door body, a door handle is welded to one side of the middle of the front face of the cabinet door body, four first grooves are formed in the front face of the cabinet door body in a rectangular array mode, and the front face of the cabinet door body is connected with an anti-collision assembly through the first grooves. According to the scheme, the cabinet door structure is provided with the mounting assembly, when the cabinet door body needs to be connected with the cabinet, the mounting base in the mounting assembly is compressed firstly, after the mounting base is compressed to a certain distance, the surface of the stable suction cup is aligned with the position to be mounted, and then the mounting base is slowly loosened; at the moment, a reset spring can drive a mounting base to move, then the surface of a stable suction cup can be attached to the surface of the to-be-mounted position, then adsorption force is formed according to the air pressure difference between the stable suction cup and the to-be-mounted position, the cabinet door body and the cabinet are connected, and compared with a bolt connection mode, the mode saves more time and is more convenient to use. And the practicability of the device is enhanced.

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 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.

Disclosed is a device for accessing an underground facility, including a frame forming an opening and a lid pivotally mounted relative to the frame. The device includes a mechanical cylinder with a helical spring, the cylinder including a body which can vary in length according to a longitudinal force which is applied thereto. The device is configured so that the cylinder assists the passage of the lid from the closed position to the open position and exerts on the lid a force opposing closure thereof during passage thereof from the open position to its closed position. The cylinder includes an adjustable head connected to one end of the body of the cylinder and a mechanism for adjusting the longitudinal position of the adjustable head with respect to the body of the cylinder. Also disclosed is a method for installing such an access device.

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.

A movable door structure includes a bracket, a door panel, and an elastic element. The bracket disposed in a machine shell includes at least one curved slide rail including a first section and a second section communicating with each other. There is a bending angle between a first extension direction of the first section and a second extension direction of the second section. The door panel disposed on the bracket is suitable for sliding along the at least one curved slide rail. When the elastic element connected between an inner surface of the door panel and an abutment portion of the machine shell pushes against the door panel, so that the door panel is located at a first position, the door panel covers an opening of the machine shell, and an exterior surface of the door panel is aligned with an outer surface of the machine shell.

A movable door structure is suitable for being assembled in a machine table shell. The machine table shell comprises an abutting part and is provided with an opening and an outer surface. The movable door structure comprises a support, a door plate and an elastic piece. The support is arranged in the machine table shell and comprises at least one curved sliding rail. The at least one curved sliding rail comprises a first section and a second section which are communicated with each other. A bending angle is formed between the first extending direction of the first section and the second extending direction of the second section. The door plate is arranged on the support and suitable for sliding along the at least one curved sliding rail. The door plate has an appearance surface and an inner surface opposite to each other. The elastic pieces are connected to the inner surface of the door plate and the abutting portion of the machine table shell. When the elastic piece abuts against the door plate to enable the door plate to be located at the first position, the door plate shields the opening of the machine table shell, and the appearance face of the door plate is flush with the outer surface of the machine table shell.

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 lifting hole protection device, protection method and installation method of the protection device mainly include a method. An electric push rod is used to drive a folding guardrail to lift upwards, gradually opening the cover plate to achieve primary protection; the electric push rod continues to extend, and the folding guardrail continues to rise. When the pulley is located at the lower end of the telescopic guardrail, the pulley will support the telescopic guardrail to rise; after the folding guardrail rises to a certain height, it will drive the drawable guardrail to move upwards. Finally, the electric push rod stops moving; at this time, the folding guardrail and the telescopic guardrail rise to the upper limit position, and the upper ends of the folding guardrail and the telescopic guardrail are flush. The drawable guardrail protects the empty area between the folding guardrail and the mounting plate foundation. The lifting hole protection device, protection method and installation method of the protection device provided by the present invention are simple, safe and convenient to operate.

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.