A brake fluid feeding device includes a fluid container, a cap, and an inflator. The cap is assembled on the fluid container. The cap has a first hole and a second hole opened thereon. A gas inlet hose is connected to the first hole and extending outward. A fluid-supplying hose is connected to the second hole. The inflator has a gas-supplying portion for gas output. One end of the gas inlet hose is detachably connected to the gas-supplying portion. When the gas inlet hose is connected to the gas-supplying portion, the gas output from the gas-supplying portion enters into the fluid container via the gas inlet hose. Accordingly, the brake fluid feeding device has a simple structure and can be operated conveniently.

Disclosed is a vacuum apparatus that is not complicated in construction, does not require two receptacle bodies, and is improved in vacuum efficiency. The vacuum apparatus includes a cylinder member provided with a guide shaft disposed in the central area of the inner space thereof, and a piston module including a separating and opening/closing unit and a hollow rod unit with a guide bore in the inside thereof extending downward from the central area of the separating and opening/closing unit. The piston module is fitted in the inside of the cylinder member to separate the inner space of the cylinder member into an upper first space and a lower second space, and provided with a first O-ring to open/close the first space and the second space in relation to each other while being moved vertically according to a moving direction in relation to the cylinder member.

Disclosed is a vacuum apparatus that is not complicated in construction, does not require two receptacle bodies, and is improved in vacuum efficiency. The vacuum apparatus includes a cylinder member provided with a guide shaft disposed in the central area of the inner space thereof, and a piston module including a separating and opening/closing unit and a hollow rod unit with a guide bore in the inside thereof extending downward from the central area of the separating and opening/closing unit. The piston module is fitted in the inside of the cylinder member to separate the inner space of the cylinder member into an upper first space and a lower second space, and provided with a first O-ring to open/close the first space and the second space in relation to each other while being moved vertically according to a moving direction in relation to the cylinder member.

In a pump dispenser having a form where a user grasps a grip to push down a finger putting portion with the user's thumb, the present invention provides a push-type pump dispenser that has a good transmission property of a finger force and is excellent in operability.

The present invention is a push-type pump dispenser A that injects liquid within a cylinder portion 11 from a nozzle portion 32 by pushing down the finger putting portion 31 located above a grip portion 12 in a state where the grip portion 12 has been grasped by a user, wherein a finger abutting portion S of the grip portion 12 is located behind a power point P1 of the finger putting portion 31.

The present invention involves a combination bucket lid and pump apparatus for pumping fluids out of a bucket having an open end, the pump mounted on the bucket lid, and the bucket lid extending over the open end of the bucket and having a circumferential clamp for clamping onto the bucket exterior and sealing the open end.

The present invention involves a combination bucket lid and pump apparatus for pumping fluids out of a bucket having an open end, the pump mounted on the bucket lid, and the bucket lid extending over the open end of the bucket and having a circumferential clamp for clamping onto the bucket exterior and sealing the open end.

System to prevent leaks of liquids in a manual sprayer—insecticides, herbicides, fungicides—comprised by a large storing tank in which a recipient is installed under pressure. A pumping assembly, which is manually activated, is connected to the inferior part of the container under pressure and to the lower part of the tank. The pumping assembly is comprised of an alternative piston to extract the liquid from the storing tank and to pressurize it inside the container under pressure. The pressurized liquid is applied using a hose and a regulating valve attached to the container under pressure. The pumping ensemble is comprised as well by a double-walled piston and a barrier against leaks of the piston, formed by a flexible sealing accordion with four lobes or waves that avoid grazing the cylinder and that prevent leaking from taking place between the superior side of the piston and the inferior side of the piston chamber, thus blocking the exit of liquid and forcing it to stay at the collection chamber until it is once again emptied thanks to the descending movement of the piston. The liquid is therefore taken back from the collection chamber to the storing tank by means of a returning hose, of an internal duct and of a siphon that unloads above the liquid level.

System to prevent leaks of liquids in a manual sprayer—insecticides, herbicides, fungicides—comprised by a large storing tank in which a recipient is installed under pressure. A pumping assembly, which is manually activated, is connected to the inferior part of the container under pressure and to the lower part of the tank. The pumping assembly is comprised of an alternative piston to extract the liquid from the storing tank and to pressurize it inside the container under pressure. The pressurized liquid is applied using a hose and a regulating valve attached to the container under pressure. The pumping ensemble is comprised as well by a double-walled piston and a barrier against leaks of the piston, formed by a flexible sealing accordion with four lobes or waves that avoid grazing the cylinder and that prevent leaking from taking place between the superior side of the piston and the inferior side of the piston chamber, thus blocking the exit of liquid and forcing it to stay at the collection chamber until it is once again emptied thanks to the descending movement of the piston. The liquid is therefore taken back from the collection chamber to the storing tank by means of a returning hose, of an internal duct and of a siphon that unloads above the liquid level.

This disclosure generally relates to an automatic bicycle, particularly to a hydraulic automatic transmission bicycle which can automatically and adaptively change gear ratios. More particularly, this disclosure relates to those hydraulic automatic transmission bicycles which use fluid pressure to change such gear ratios, and which include various hydraulic automatic transmissions which may be provided in various configurations and may operate in various methods and sequences to provide automatic and infinitely variable gear ratios.

A foam pump has dual, coaxial air and liquid cylinders, each having a respective air and liquid piston which move together during a dispensing operation. One or more air passageways between the air cylinder and a liquid-air mixing chamber are configured to impart rotation to an airstream passing from the air cylinder to the mixing chamber to increase turbulent mixing of the air and liquid in the mixing chamber. The liquid cylinder is axially aligned with the air cylinder to provide a low profile pump which does not require a dip tube or sleeve to communicate with the bottom of the liquid source when used in an inverted application wherein the foam pump is positioned below the source of liquid. A resilient valve member in the liquid outlet is biased to close on its own to prevent leaking in the event the air and liquid pistons do not fully return to the home position.