Abstract: An extension ladder includes sub-ladders and cushions. Each sub-ladder includes a rung s connected to two tubes. The tubes of each sub-ladder are telescopically connected to the tubes of an adjacent sub-ladder. Each cushion includes an air bag and a slow-release unit. The air bag includes an open end with a channel. The air bag of each cushion is inserted in a corresponding tube. The slow-release unit is operable to slowly release air from the air bag and includes a restraint and a membrane. The restraint is connected to the open end of the air bag. The membrane includes an aperture and is movable arranged between the restraint and the open end of the air bag, with the aperture in communication with the channel.

Abstract: An extension ladder includes sub-ladders and cushions. Each sub-ladder includes a rung s connected to two tubes. The tubes of each sub-ladder are telescopically connected to the tubes of an adjacent sub-ladder. Each cushion includes an air bag and a slow-release unit. The air bag includes an open end with a channel. The air bag of each cushion is inserted in a corresponding tube. The slow-release unit is operable to slowly release air from the air bag and includes a restraint and a membrane. The restraint is connected to the open end of the air bag. The membrane includes an aperture and is movable arranged between the restraint and the open end of the air bag, with the aperture in communication with the channel.

Abstract: A thermo tea maker includes a tea cup and a tea infuser. The exterior of the tea cup has a first isolation gap in a vacuum state to block the heat conduction from an inner part to an outer part of the cup part. The exterior of the tea infuser has a second isolation gap in a vacuum state to block the heat conduction from an inner segment to an outer segment of the tea infuser. The tea cup and the tea infuser are able to keep the tea warm. When the tea infuser is turned, the tea infuser will not scald the user's hand.

Abstract: A rotary tea maker includes a tea cup and a tea infuser. After the tea is brewed in a tea brewing room of the tea infuser, through rotation of the tea infuser, the tea is discharged from the tea brewing room to be stored in a tea room of the tea cup for use. The tea in the tea brewing room flows to a passage from a water outlet of the tea infuser and then enters the tea room from a through hole of the tea cup. During the process, the air in the tea room is expelled to the passage from the through hole when the tea is poured and then flows to the tea brewing room through an air hole of an air pipe of the tea infuser, so that the tea in the tea brewing room can be discharged to the tea room smoothly.

Abstract: A bicycle includes a notch centrally defined therein and two support portions respectively formed on two opposite edges of the notch, wherein each support portion complementally corresponds to lateral nipples. The bottom of the notch is divided into a first inclined face and a second inclined face. Each inclined face has a series of first through holes equally and vertically defined therein such that each first through hole has an axis forming an angle with a corresponding one of the diameters of the bicycle rim, wherein the first through holes in the first inclined face are interlaced to that in the second inclined face.

Abstract: A container for storing food is provided with a receptacle including a bellows, a top opening, and external threads around the opening; and a lid including a skirt including internal threads secured to the external threads, a top bossed hole communicating with the bellows, and a top frame having an n-shaped section, the frame including an inner slot; an inlet valve in the bossed hole; a trigger assembly including a spring loaded piston in the frame, and a trigger formed with the piston; a sealing ring secured to an end of the piston distal the trigger; a cylinder for receipt of the sealing ring and a portion of the piston, an inlet port fitted on the bossed hole, and an outlet valve at an end distal the sealing ring; and a cover including a peripheral opening for receipt of the trigger.

Abstract: A rim includes two annular walls. Each of the annular walls includes an edge, an internal face, and at least one rib extending on the internal face near the edge. The rib of each of the annular walls of the rim bites an external face of a corresponding annular wall of a tubeless tire when the tubeless tire is mounted on the rim.

Abstract: A wheel includes a multi-layered rim, a sealing tape and a pressure-resistant tape. The multi-layered rim includes two layers. The first layer includes apertures for nipples. The second layer includes apertures corresponding to the apertures of the first layer. The sealing tape is used to wrap the second layer to seal the apertures of the second layer. The pressure-resistant tape is used to cover and support the sealing tape against high pressure.

Abstract: A tea pot is provided with a container having an upper reservoir, a lower reservoir, and an intermediate dividing member; a cavity formed with the dividing member and having an upper opening for communicating with the upper reservoir, and a lower opening for communicating with the lower reservoir; a receptacle in the upper reservoir and including a ball receiving well; a vent pipe partially positioned in the receptacle and having a passageway; a threaded recess extending outward from the cavity and being open to an outer surface of the container; a rotatable cylinder inserted through the recess into the cavity and including a hollow main body having surface openings; a nut secured to the recess; and a knob secured to the cylinder. Communication from the upper reservoir to the lower reservoir through the openings of the main body can be open or closed by turning the knob.

Abstract: A container for storing food is provided with a receptacle including a bellows, a top opening, and external threads around the opening; and a lid including a skirt including internal threads secured to the external threads, a top bossed hole communicating with the bellows, and a top frame having an n-shaped section, the frame including an inner slot; an inlet valve in the bossed hole; a trigger assembly including a spring loaded piston in the frame, and a trigger formed with the piston; a sealing ring secured to an end of the piston distal the trigger; a cylinder for receipt of the sealing ring and a portion of the piston, an inlet port fitted on the bossed hole, and an outlet valve at an end distal the sealing ring; and a cover including a peripheral opening for receipt of the trigger.

Abstract: A tea pot includes an upper container assembly comprising a releasable top, an open bottom, a beverage chamber, and a funnel in the beverage chamber; a check valve comprising a cylindrical seat comprising a bossed hole having a conical top surface, an opening spaced from the hole and being sealingly aligned with a stem of the funnel, and guide slots on an annular surface of the seat; a conical valve unit comprising a stepped-diameter tunnel, the valve unit being seated upon the seat; and a sliding assembly comprising a body, periphery tabs slidably received in the guide slots, and a top shaft including grooves, and a cylindrical top projection fasten in the tunnel wherein the shaft is slidably inserted into the hole in an assembled state; and a lower container assembly comprising releasable top and bottom, a lower ingredient chamber, and an intermediate strainer.

Abstract: A tea pot includes a lower container assembly comprising an internally threaded open top, a releasable bottom, and a diaphragm for dividing space of the lower container assembly into a lower beverage chamber and an upper passage chamber, the diaphragm having holes for communicating the beverage chamber with the passage chamber and an annular flange projecting into the passage chamber; and an upper container assembly comprising an externally threaded lower portion secured to the top of the lower container assembly, a releasable top, a bottom dividing the upper container assembly into upper ingredient chamber and lower passageway chamber, a cylindrical channel integrally formed with the bottom of the upper container assembly and projecting into the passageway chamber, and an annular gasket put on the channel and blocking the holes when the upper and lower container assemblies are threadedly secured together; and a strainer in the ingredient chamber.

Abstract: A tea pot is provided with a container having an upper reservoir, a lower reservoir, and an intermediate dividing member; a cavity formed with the dividing member and having an upper opening for communicating with the upper reservoir, and a lower opening for communicating with the lower reservoir; a receptacle in the upper reservoir and including a ball receiving well; a vent pipe partially positioned in the receptacle and having a passageway; a threaded recess extending outward from the cavity and being open to an outer surface of the container; a rotatable cylinder inserted through the recess into the cavity and including a hollow main body having surface openings; a nut secured to the recess; and a knob secured to the cylinder. Communication from the upper reservoir to the lower reservoir through the openings of the main body can be open or closed by turning the knob.

Abstract: A tea pot includes an upper container assembly comprising a releasable top, an open bottom, a beverage chamber, and a funnel in the beverage chamber; a check valve comprising a cylindrical seat comprising a bossed hole having a conical top surface, an opening spaced from the hole and being sealingly aligned with a stem of the funnel, and guide slots on an annular surface of the seat; a conical valve unit comprising a stepped-diameter tunnel, the valve unit being seated upon the seat; and a sliding assembly comprising a body, periphery tabs slidably received in the guide slots, and a top shaft including grooves, and a cylindrical top projection fasten in the tunnel wherein the shaft is slidably inserted into the hole in an assembled state; and a lower container assembly comprising releasable top and bottom, a lower ingredient chamber, and an intermediate strainer.

Abstract: A tea pot includes a lower container assembly comprising an internally threaded open top, a releasable bottom, and a diaphragm for dividing space of the lower container assembly into a lower beverage chamber and an upper passage chamber, the diaphragm having holes for communicating the beverage chamber with the passage chamber and an annular flange projecting into the passage chamber; and an upper container assembly comprising an externally threaded lower portion secured to the top of the lower container assembly, a releasable top, a bottom dividing the upper container assembly into upper ingredient chamber and lower passageway chamber, a cylindrical channel integrally formed with the bottom of the upper container assembly and projecting into the passageway chamber, and an annular gasket put on the channel and blocking the holes when the upper and lower container assemblies are threadedly secured together; and a strainer in the ingredient chamber.