Abstract: A solar window system for a building is provided. The solar window system includes multiple heat generation encasements. Air inside each heat generation encasement is heated by solar energy. The solar window system further includes a storage tank for storing heat from the heated air. The solar window system also includes a set of connection pipes, wherein the set of connection pipes draw cold air from an indoor space inside the building into the plurality of heat generation encasements, connect each of the heat generation encasements to at least two other heat generation encasements, and transfer the heated air from the set of heat generation encasements to the storage tank.

Abstract: An object of the present invention is to provide a refrigerant circulation device and method that can suppress acid generation caused by decomposition of a refrigerant containing an HFO or HCFO. The refrigerant circulation device has a compressor, a condenser, expansion valves and an evaporator connected by a main pipe to form a refrigerant circulation circuit through which a refrigerant is circulated, the refrigerant circulation circuit being filled with a refrigerant containing a hydrofluoroolefin or a hydrochlorofluoroolefin having a carbon-carbon double bond within the molecular structure, wherein the refrigerant circulation device includes a drive that drives the compressor via a speed increaser, and a drive cooling unit that cools the drive with the refrigerant condensed in the condenser, and a desiccant that can trap moisture is disposed in the evaporator or the drive cooling unit.

Abstract: An ejector refrigeration circuit comprises: a high pressure ejector circuit comprising in the direction of flow of a circulating refrigerant: a heat rejecting heat exchanger/gas cooler having an inlet side and an outlet side; at least one ejector comprising a primary high pressure input port, a secondary low pressure input port, and an output port, the primary high pressure input port being fluidly connected to the outlet side of the heat rejecting heat exchanger/gas cooler; a receiver, having a liquid outlet, a gas outlet and an inlet, which is fluidly connected to the output port of the at least one ejector; at least one compressor having an inlet side and an outlet side, the inlet side of the at least one compressor being fluidly connected to gas outlet of the receiver.

Abstract: A compressor 12 for use in a refrigerant circuit 11 using a refrigerating machine oil 60 being free of phosphoric ester and a refrigerant mixture inclusive of 1,1,2-trifluoroetylene includes a rolling piston 32 and a vane 33 in contact with the rolling piston 32 in a slidable manner. The rolling piston 32 and the vane 33 are formed of a base metal, the base metal being steel, and the base metal is exposed at a contact portion between the rolling piston 32 and the vane 33.

Abstract: A liquid absorption refrigeration system and a tube and channel heat exchanger include: an absorber section to contain a saturated strong solution; a pump connected to an outlet of the absorber section to receive saturated strong solution therefrom; a regenerator section connected to an outlet of the pump to receive a flow of pressurized saturated strong solution therefrom; an expansion device connected to an outlet of the regenerator section to receive a flow of subcooled strong solution therefrom; an evaporator section connected to an outlet of the expansion device to receive the subcooled strong solution therefrom, the evaporator section connected to the absorber section to return strong solution thereto; and a condenser section connected to the evaporator section to receive a refrigerant evaporated from the subcooled strong solution in the evaporator, the condenser section connected to the absorber section to return liquid refrigerant thereto.

Abstract: This invention relates to a cooling device which utilizes both thermoelectric and magnetocaloric mechanisms for enhanced cooling applications. Using high thermal conductivity magnetocaloric composites in conjunction with thermoelectric elements acting as thermal switches which are electrically coupled to a magnetization and demagnetization cycle enables the use of larger quantities of magnetocaloric material, and high efficiency solid state cooling can be achieved. Solid state cooling devices are useful for a variety of industrial applications which require cooling, such as, but not limited to cooling of microelectronic devices, cooling on space platforms, etc.

Abstract: A system for pre-cooling inlet air to an air conditioning condenser unit using evaporative cooling. The system includes a support frame, a set of removable mesh panels for passing through inlet air, and a water disposal system for wetting the mesh panels actuated by operation of the air conditioning condenser unit.

Abstract: The multiple panel heat exchanger includes two or more heat exchange panels arranged side-by-side series with their major cross-sectional areas normal to airflow across the heat exchanger. The heat exchange panels are fluidically connected in series and with a first heat exchange panel in the series having a heat exchange fluid inlet into the heat exchanger and a last heat exchange panel in the series having a heat exchange fluid outlet from the heat exchanger. An inlet liquid refrigerant injector and vaporizer has a valve that can control the rate of injection and can close completely. The panels are connected by a pipe assembly containing another valve that can also control the rate of gas refrigerant passage and which can also be closed.

Abstract: An expansion engine operating on a Brayton cycle which is part of a system for producing refrigeration at cryogenic temperatures that includes a compressor, a counter-flow heat exchanger, and a load that may be remote, which is cooled by gas circulating from the engine. The engine has a piston in a cylinder which has nearly the same pressure above and below the piston while it is moving. A valve connecting the warm end of the cylinder to a buffer tank allows a partial expansion and recompression of gas in the cold displaced volume that increases the refrigeration produced in each cycle with the same compressor flow rate.

Abstract: A method for controlling a refrigeration system having a compressor, heat rejecting heat exchanger, expansion valve and heat absorbing heat exchanger circulating a refrigerant in series flow, the heat absorbing heat exchanger in thermal communication with working fluid, the method includes obtaining an expansion valve position set point; using a feedback control loop to generate a controlled expansion valve position; obtaining a rate of change of an operating parameter of the system; using the rate of change of the operating parameter to generate an adjustment; modifying the controlled expansion valve position using the adjustment; and controlling the expansion valve using the modified controlled expansion valve position.

Abstract: Disclosed is a refrigeration system including a heat transfer fluid circulation loop configured to allow a refrigerant to circulate therethrough. A purge gas outlet is in operable communication with the heat transfer fluid circulation loop. The system also includes at least one gas permeable membrane having a first side in operable communication with the purge gas outlet and a second side. The membrane includes a porous inorganic material with pores of a size to allow passage of contaminants through the membrane and restrict passage of the refrigerant through the membrane. The system also includes a permeate outlet in operable communication with a second side of the membrane.

Abstract: The invention relates to ice maker trays, wherein an ice maker tray can have the following: a tray body form areas for presetting forms for ice form elements to be produced, wherein these form areas are integrated in the tray body, a flow channel for a fluid, wherein the flow channel is integrated in the tray body, wherein the flow channel has a channel axis, and the flow channel is closed in circumferential direction around the channel axis. The invention also relates to an ice maker and to a household refrigeration apparatus.

Abstract: A portable cooler includes a cooler body formed of an insulating shell defining an interior storage section, a lid mating surface formed at a first angle relative to a bottom surface of the cooler body, and a cooler lid coupled to the cooler body by a hinge. The cooler lid includes a body mating surface formed at a second angle that is a supplementary angle to the first angle so that a first surface of the cooler lid extends generally horizontally from the cooler body when the lid is fully opened. Some embodiments may include two lids, each of which opening in opposite direction. An internal reinforcement within the cooler body allows the cooler to resist deflection in the lid contact region when the lid is opened and in contact with the cooler body.

Abstract: A refrigerator may have an ultra-low temperature cooling module for cooling an ultra-low temperature compartment that includes a thermoelectric element having a heating surface and a heat absorption surface disposed to oppose the heating surface and a heat conduction unit evaporation part whose one side is in contact with the heating surface of the thermoelectric element and the other side is connected to a refrigerant pipe of an evaporator to transmit heat emitted from the heating surface of the thermoelectric element to the refrigerant. An amount of heat exchange between a central portion of the heating surface having a relatively high temperature and a refrigerant of the heat conduction unit evaporation part may be greater than an amount of heat exchange between a peripheral portion of the heating surface surrounding the central portion and the refrigerant.

Abstract: A refrigerator includes a refrigerated compartment, at least one door that selectively seals the refrigerated compartment and a cold plate shelf assembly mounted in the refrigerated compartment. The shelf assembly includes a front trim, a rear trim and a first plate directly coupled to the front trim and the rear trim. A second plate extends from the front trim to the rear trim, the second plate being positioned so that a food item supported on the shelf assembly contacts the second plate. The second plate is made from a material having a higher thermal conductivity than glass. In one arrangement, the refrigerator further includes an air duct having an air vent. Air exiting the air duct through the air vent either impinges on and travels across the second plate or enters an interior of the shelf assembly.

Abstract: A body of a refrigeration appliance has an outer membrane, an inner membrane which delimits a cooled storage compartment which is accessible from a front side of the body, and a foamed material layer filling an intermediate space between the outer and inner membrane. A machine compartment is recessed on the rear of the body. A ducting pipe extends from the machine compartment to the front side. The outer membrane is built in two layers on a bottom side of the carcass and the ducting pipe extends between an inner and an outer layer of the outer membrane.

Abstract: A locker assembly insert 10 for a cabinet 11. The cabinet 11 is a two door cabinet having a first door 12 and a second door 13. A central mullion 19 having a rear cover plate divides the cabinet 11 down the middle and the doors 12 and 13 close the cabinet. The locker assembly insert 10 in this case is applied to a two door cabinet and has a central support member 20 (which is put in place by first removing the rear cover plate behind the central mullion 19, the rear cover plate is tucked in behind the central support member 20 before assembly allowing it to be reused if the refrigerator is ever restored to its original condition). The insert is completed using vertical divider sets 27, 28 and 29 and ten door locker door assemblies 30 and 31.

Abstract: A beverage making machine having a tank may be arranged to carbonate and/or chill liquid in the tank. A thermoelectric device may be thermally coupled to the tank to cool precursor liquid in the tank, and a heat pipe may transfer heat from the thermoelectric device to a heat sink. The heat sink may be located remotely from the thermoelectric device, e.g., in an air duct that helps prevent contact of moisture, dirt, etc. in the duct with the thermoelectric device.

Abstract: A method for electrical energy storage with co-production of liquefied methaneous gas which comprises in combination the processes of charging the storage with liquid air through its production using an externally powered compressor train and open air auto-refrigeration cycle, storing the produced liquid air and discharging the storage through pumping, regasifying, superheating and expanding the stored air with production of on-demand power, and additionally includes a process of recovering the cold thermal energy released by regasified liquid air for controlled liquefying the methaneous gas delivered into energy storage facility at a rate and pressure consistent with those of liquid air.

Abstract: Method and system for removing high freeze point components from natural gas. Feed gas is cooled in a heat exchanger and separated into a first vapor portion and a first liquid portion. The first liquid portion is reheated using the heat exchanger and separated into a high freeze point components stream and a non-freezing components stream. A portion of the non-freezing components stream may be at least partially liquefied and received by an absorber tower. The first vapor portion may be cooled and received by the absorber tower. An overhead vapor product which is substantially free of high freeze point freeze components and a bottoms product liquid stream including freeze components and non-freeze components are produced using the absorber tower.

Abstract: Methods and apparatuses for drying electronic devices are disclosed. Embodiments include methods and apparatuses that heat and decrease pressure within the electronic device. Some embodiments increase and decrease pressure while adding heat energy, such as by using a heated platen in contact with the electronic device or by supplying a gas (e.g., air), which may be heated, into the interior of the electronic device. Embodiments include heating the gas supplied into the interior of the electronic device with pump used to decrease pressure within the electronic device and/or a separate heater. Still other embodiments include controlling the temperature of the gas supplied into the electronic device. Still further embodiments automatically control, such as by using an electronic processor, some or all aspects of the drying of the electronic device.

Abstract: A dual annealing apparatus and use thereof for precision annealing of an article are provided. In one aspect, an annealing apparatus includes: a first heating plate opposite a second heating plate; a first cooling source associated with the first heating plate; and a second cooling source associated with the second heating plate, wherein the first heating plate and the second heating plate are independently controllable, and wherein the first cooling source and the second cooling source are independently controllable. A method for annealing an article using the annealing apparatus is also provided.

Abstract: A molten thermoplastic circulation system that is used in conjunction with thermoplastic melter kettles. The molten circulation system includes a vertical material transfer tube that is coupled to a melter kettle and includes an auger. The vertical material transfer tube is coupled to the top and bottom of a melter kettle so as to transfer molten thermoplastic between the bottom and top of the melter kettle. The vertical material transfer tube is at least partially surrounded by a heat chamber through which a heated fluid such as hot combustion gases or heated oil can flow. In use molten thermoplastic material that is heated at a higher temperature at the bottom of a melter kettle near the combustion chamber is transferred through the vertical material transfer tube to the top of the melter kettle to improve melting efficiency.

Abstract: An air condenser and a clothes dryer. The air condenser includes condensing air ducts and a cooling pipeline arranged crosswise. The condensing air ducts include a first group of condensing air ducts and a second group of condensing air ducts, wherein air inlet ducts of the first group of condensing air ducts and air outlet ducts of the second group of condensing air ducts are at least partially arranged in a heat exchangeable manner; and air outlet ducts of the first group of condensing air ducts and air inlet ducts of the second group of condensing air ducts are at least partially arranged in a heat exchangeable manner.

Abstract: An evaporator suitable for a thermal dissipation module. The thermal dissipation module includes a tube or pipe and fluid. The evaporator includes a housing, a first heat dissipation structure and a second heat dissipation structure disposed in a sealed chamber of the housing. The chamber is configured to communicate with the pipe, and the fluid is configured to flow in the pipe and the chamber. The first heat dissipation structure and a second heat dissipation structure provide a plurality of fluid flow passages through which the fluid flows and evaporates. A manufacturing method of the evaporator is also disclosed.

Abstract: A heat dissipation module used for an electronic device is provided. The electronic device has a heat source. The heat dissipation module includes an evaporator, a pipe, and a working fluid. The evaporator has a recess at an exterior surface of the evaporator, and the heat source is thermally contacted with the recess to transfer a heat generated from the heat source to the recess of the evaporator. The pipe is connected to an inner space of the evaporator and forms a loop. The working fluid is filled in the loop, wherein the working fluid in liquid passing through a portion of the inner space of the evaporator corresponding to the recess absorbs the heat and is transformed into vapor.

Abstract: A vapor chamber and heat pipe combined structure includes a vapor chamber, a first capillary tissue, a heat pipe, and a working fluid. The vapor chamber includes an upper metal casing, a lower metal casing, a containing chamber between the upper and lower metal casings, a riser at the lower metal casing, and a through hole communicated with the containing chamber. The first capillary tissue is installed in the containing chamber and has a receiving hole corresponsive to the through hole. The heat pipe includes a pipe body and a second capillary tissue installed in the pipe body and extended out of the pipe body to form an exposed section. The heat pipe is connected to the through hole and the receiving hole, so that the exposed section is attached to the receiving hole of the first capillary tissue. The working fluid is filled into the containing chamber.

Abstract: In a vapor chamber and its upper casing member, the vapor chamber includes a lower casing, an upper casing member and a working fluid. The upper casing member is engaged and sealed with the lower casing, and a chamber is enclosed between the upper casing member and the lower casing. The upper casing member includes a substrate, plural fins and plural support bodies which are integrally formed with one another. The substrate has an outer surface and an inner wall disposed opposite to each other, and each fin is formed and extended from the outer surface, and each support body is formed and extended from the inner wall. The working fluid is filled in the chamber. Each support body is provided for conducting heat from the lower casing to each fin.

Abstract: A vapor chamber structure includes an upper metal casing, a lower metal casing, a partition plate and a working fluid. The lower metal casing is engaged and sealed with the upper metal casing, and a containing chamber is formed between the upper metal casing and the lower metal casing. The partition plate is laid inside the containing chamber and includes a gas channel configured to be facing the upper metal casing. The working fluid is filled in the containing chamber. Therefore, the gas evaporated in the vapor chamber will move along a fixed path to prevent the occurrence of turbulence effectively.

Abstract: A heat pipe and a sealing method thereof; the sealing method for a heat pipe includes the steps of: providing a metal pipe member, the metal pipe member including one end having a sealed end portion formed thereon and another end thereof having a narrowing neck section extended therefrom. The narrowing neck section includes a channel. A compression mold compresses the narrowing neck section and moves away from the metal pipe member in order to compress and elongate the narrowing neck section into a compression elongated column and to seal the channel. Finally, spot welding process is performed on the compression elongated column to form a sealed block thereon. The present invention is of the merits of improved work efficiency for heat pipe bending, compression and testing and increased length of the metal pipe member with enhanced thermal transfer performance of the heat pipe.

Abstract: A heat storage system is provided that is capable of being manufactured at lower cost and has higher heat transmission efficiency. A heat storage system includes a heat storage material having a higher specific gravity in a solid phase than in a liquid phase, a heat storage tank for containing the heat storage material, a cooling side heat exchanger arranged at an upper section inside the heat storage tank and for cooling the heat storage material, a heating side heat exchanger arranged at a lower section inside the heat storage tank and for heating the heat storage material, and a wall surface heater for heating a side wall of the heat storage tank.

Abstract: A header for a heat exchanger includes a first and a second cylindrical portion. The first cylindrical portion has a first diameter, and extends over a first length portion of the header. The second cylindrical portion has a second diameter that is smaller than the first diameter, and extends over a second length portion of the header. Tube receiving slots are arranged along the first length portion. An end cap is received into an open end of the first cylindrical portion, and is joined thereto to seal a first end of the header. An open end of the second cylindrical portion is arranged at a second end of the header opposite the first end to allow for fluid flow into or out of the header. A circumferential bead is located between the first and second cylindrical portions, and extends radially outward of the first cylindrical portion.

Abstract: Pellet compositions for sealing a leak include (a) a fibrillated fibrous material, (b) a particulate material, and (c) a compound that by itself and/or in combination with at least one additional compound is configured to generate effervescence. Systems for sealing a leak include (a) a pellet composition, and (b) a first fluid configured for combination with the pellet composition, wherein the first fluid includes water. Methods for sealing a leak in a heat exchange system are described.

Abstract: In the case of a heat exchanger element for equipping heat exchangers of flue gas cleaning systems of power stations, the heat exchanger element can be formed by a block shaped honeycomb body having four outer faces and two substantially parallel end faces and a sealing edge. The honeycomb body can be manufactured from a plastics material including a plurality of mutually parallel flow channels which are separated from each other by channel walls. The flow channels extend from the one to the other end face, and the sealing edge can be arranged in the region of one of the end faces and substantially parallel to this end face and extends away from the honeycomb body at the periphery of the honeycomb body.

Abstract: A linear locking barrel system for a firearm may include a frame, a slide movably mounted on the frame and defining a barrel channel, a barrel at least partially positioned in the barrel channel of the slide and being movable with respect to the frame and slide along a linear path, and a locking member configured to lock movement of the slide with the barrel for at least a portion of rearward recoil movement of the barrel. The locking member has an engaged condition in which the locking member locks the barrel and slide together and a disengaged condition in which the locking member releases the slide from the barrel during rearward recoil movement.

Abstract: A lightweight rifle has a chassis with a forward receptacle and rear receptacle, a forend tube with a male key, a barrel, a breech, a spacer, a trigger guard, a grip, and a butt stock adapter. The barrel and breech connect along a shared longitudinal axis, and the resulting subassembly inserts into the forend tube. The spacer secures the connection between the breech and the forend tube with a combination of scope screws and rivets that extend through the forend tube, spacer, and breach, respectively. This forend tube subassembly connects to the chassis by inserting the forend tube male key into the chassis forward receptacle and further securing the male key and forward receptacle together with bolts. The butt stock adapter has a protruding male key and mates to the chassis rear receptacle. This allows for the quick and secure connection of a butt stock to the rifle chassis.

Abstract: An improved bolt and bolt carrier with integral gas key having an extension nozzle threadedly secured and pinned to the gas key for use with a direct gas operated firearm is provided. The extension nozzle is designed to receive a portion of the host firearm's gas operating system. The firing pin retaining pin is oriented so as to expose its widest profile to the firing pin's annular flange, increasing its service life. The bolt has a plurality of lugs extending from its forward end. The extractor recess is constructed so that the face of the bolt is round and the adjacent lugs fully supported. The extractor engages approximately 17% more of a seated ammunition cartridge's rim as compared to the prior art AR15/M16 extractor. The result is an improved bolt and bolt carrier which provides for increased operational reliability.

Abstract: Magazine loaders for sequentially loading cartridges into an uppermost cartridge space of a magazine are disclosed. A magazine loader may comprise a housing including a plurality of wall portions defining a housing cavity. The wall portions may define opposing arcuate pin receiving channels. The magazine loader may also include a pin and a tool. The pin may include a starboard end and a port end. The starboard end of the pin may be disposed inside a starboard channel and the port end of the pin may be disposed inside a port channel so that translation of the pin is constrained to movement along a path defined by the channels. An intermediate portion of the pin may extend through the bore defined by a central portion of the tool so that the tool is supported by the pin and the tool follows the path defined by the channels.

Abstract: The present invention is directed toward a firearm takedown assembly. The preferred embodiment of the firearm takedown assembly comprises a docking plate configured to be removably secured to a firearm and a lever pivotably attached to the docking plate. The assembly may further comprise a pivot pin, wherein the lever is connected to the pivot pin. The lever is utilized to remove a takedown pin from the upper and lower receiver of the firearm so that a user may quickly disassembly the firearm. When the user desires to reassembly the user may thumb the lever to reinsert the takedown pin into the upper and lower receiver.

Abstract: An extractor for a firearm. The extractor includes an extractor body, an edge at a first end of the extractor body, a pivot at a second end of the extractor body, opposite the first end, and a locking portion. The extractor edge is configured to engage a bullet casing. The pivot is configured to permit the extractor to pivot about a first axis and to pivot about a second axis that is orthogonal to the first axis when the extractor is installed within a firearm slide. The locking portion is configured to engage with a corresponding locking element in the firearm slide.

Abstract: A method and apparatus for discharge blocking device compatible with a firearm having a magazine housing and a trigger bar, the discharge blocking device comprising, a cover, having a shape compatible with the magazine housing, abase, covering a locking mechanism, and a locking element, at least partially accommodated in a channel inside the cover, wherein the locking element is configured to allow movement within the channel between locked and unlocked states in order to allow blocking the trigger bar of the firearm, and wherein the locking element is at least partially accommodated inside the wall of the cover and configured to at least partially rotate between locked and unlocked states about an axis that is aligned with the longitudinal dimension of the cover, in order to allow blocking the trigger bar of the firearm with the blocking segment.

Abstract: A trigger activated arm may use engagement of an integrated gun bolt cam with an integrated trigger cam to reposition the trigger as the gun bolt reciprocates. The gun bolt trigger engagement may be used to reset the trigger.

Abstract: A firearm stock with a support such as a bipod, tripod, monopod, or aiming stick is described. The support includes support legs and a mounting structure which mounts the support legs onto the stock. The support legs may be detached from the mounting structure when the support is not in use. After removal from the mounting structure, the support legs may be stored in one or more channels in the stock, by sliding them through one or more apertures in the end of the butt of the stock. The mounting structure may include a swivel mechanism which allows the aiming of the rifle to be adjusted while the support legs remain engaged with the ground.

Abstract: A compressed gas gun is provided, wherein the body houses a firing assembly and an internal, built-in projectile feed mechanism. The projectile feed mechanism is preferably formed as a rear or butt stock of the compressed gas gun. The projectile feed mechanism preferably feeds projectiles to the firing assembly via a feed ramp having an S-shaped transition portion. The compressed gas gun preferably includes a removable top feed rail assembly that can be removed to expose the interior of the compressed gas gun body for field stripping. Central control circuitry is preferably provided for controlling both the firing assembly and the projectile feed mechanism.

Abstract: The invention relates to a paintball backpack for storing, transporting and/or delivering projectiles to a device for firing the projectiles, comprising a storage container for the projectiles and at least one delivery connection for transporting the projectiles, wherein the paintball backpack comprises a first and at least one second delivery device, wherein the first and the at least one second delivery device are arranged superposed over each other in or on a storage container and are connected to each other by the at least one delivery connection. Furthermore, the invention relates to a method for delivering projectiles from a storage container by at least two delivery devices for transferring the projectiles to a device for firing the projectiles.

Abstract: The present invention is to provide an expandable baton with a smasher at the front end of an inner rod thereof, wherein an impact groove, a tapered groove, an aligning groove, and a compression force application groove are sequentially formed in the smasher and the front end of the inner rod. A compression spring can push an impact block in the compression force application groove toward the impact groove in order to position a smashing rod in the corresponding grooves and expose a front conical portion of the smashing rod. When the conical portion is forcibly pressed against an object to-be-smashed, the smashing rod is partially pressed against the wall of the tapered groove and is thrusted into a hitting groove in the impact block upon aligning with the axis of the impact block. The impact block is then driven outward by the compression spring and drives the conical portion to smash the object.

Abstract: A travel limiting device is disclosed. In one embodiment, the device may be positionable within a position slot and a channel in a buffer tube of a firearm to limit the adjustability of a buttstock. The device may include a main body having a stop surface. The main body may be positionable within the channel. The device also may include a protrusion extending from the main body. The protrusion may be positionable within the position slot.

Abstract: A bag for undercover carrying of a gun that has an internal pocket, several external pockets and fast opening system. The internal pocket is designed to contain the gun. The external pockets cover the internal pocket that has an opening part that has a substantially narrow like-tab structure. The opening part is closed by a bidirectional zipper and a quick release closing means.

Abstract: A gun sight assembly is provided comprising a front sight and a rear sight that cooperatively define an aiming axis for aiming the weapon. The sights include alignment arms that project in a radial manner from the aiming axis. The gun sight provides an initiative means for aligning the weapon. In use, the user aligns the weapon on a target utilizing the gun sight by placing his sightline along the aiming axis. The user receives positive visual confirmation of correct alignment, when the alignment arms all radiate from a single point (i.e., on the aiming axis). In this manner, any variation from precise alignment can be quickly and intuitively visually discerned by the user.

Abstract: Viewfinder for bow strings, aimed to be connected to a bow string such that a user may look through it and obtain a precise shot, which comprises an elongated body with a through-hole defined between a front side and a rear side, wherein the hole further comprises a first sector, a second sector and a third sector, designed to prevent the reflections produced inside the hole by the light beams hitting it from the exterior from propagating to the user.