There is provided an angle type check valve which enables simple and quick replacement operations of a valve body and a valve seat without releasing a piping coupled state and has excellent maintainability. The angle type check valve according to the present invention includes: a valve box main body which is provided with an inflow port opened on a lower side, an outflow port opened on a lateral side, and an access hole opened on an upper side, and in which a valve chamber that has a bent shape is formed; a lid body which seals the access hole; a valve seat which is provided with a valve port; a valve body which opens and closes the valve port; and a hinge mechanism which supports the valve body. As a valve unit, the valve seat, the valve body, and the hinge mechanism are integrally assembled so as to be made into a unit part. The valve unit is attached to and detached from a unit fitting portion in the valve box main body. A pushing tool is provided which exerts pushing force in a direction of pressing a lower surface of the valve unit against the unit fitting portion in accordance with the operation of fitting the lid body in the access hole.

A check valve system includes a housing, a blocking element, and a biasing member. The housing has a passageway therethrough, the passageway including a first portion and a second portion, the first portion having a diameter that is less than a diameter of the second portion so as to form a stepped portion. The blocking element is disposed within the second portion of the passageway. The biasing member is disposed within the second portion of the passageway and configured to maintain the blocking element in contact with the stepped portion when under compression. The housing, the blocking element and the biasing member being obtainable by substantially simultaneously 3D printing, so as to be formed from one or more 3D printable materials.

A check valve system includes a housing, a blocking element, and a biasing member. The housing has a passageway therethrough, the passageway including a first portion and a second portion, the first portion having a diameter that is less than a diameter of the second portion so as to form a stepped portion. The blocking element is disposed within the second portion of the passageway. The biasing member is disposed within the second portion of the passageway and configured to maintain the blocking element in contact with the stepped portion when under compression. The housing, the blocking element and the biasing member being obtainable by substantially simultaneously 3D printing, so as to be formed from one or more 3D printable materials.

Check valve assembly (1, 1′) for a shock absorber (100) comprising a housing (10). The housing (10) comprises a first volume (11), wherein a pressure P1 prevails; a second volume (12), wherein a pressure P2 prevails; a first housing portion (VE1), and a second housing portion (VE2). The housing (10) further comprises a fluid passage (20) between said first (11) volume and said second (12) volume; and a spool (40), said spool (40) being movably arranged in said housing (10) between at least a first position in which a flow of fluid through said fluid passage (20) between the first (11) and second (12) volume is allowed and at least a second position in which a flow of fluid through said fluid passage (20) between the first (11) and second (12) volume is prevented. The spool (40) comprises a first portion (S1) adapted to engage with said first portion (VE1) of said valve housing 10, forming a first region of engagement (RE1), and a second portion (S2) adapted to engage with said second portion (VE2) of said valve housing (10), forming a second region of engagement (RE2). Further, the first region of engagement (RE1) is arranged at a first location and said second region (RE2) is arranged at a second location. Also, a shock absorber (100) comprising a working cylinder (C) adapted to receive a working fluid, a piston dividing said cylinder (C) into a first (WC1) and a second (WC2) working chamber and a check valve assembly (1, 1′) according to above. Further, a front fork comprising such a check valve assembly (1, 1′).

A vacuum-sealed container wherein a large negative pressure is applied inside the container without using a pump, making it possible to store food for a long time; the container can be sealed without using a packing. The vacuum-sealed container includes: a container body having a lid coupling groove formed along the periphery of the upper end portion of an opening and arranged along a closed path; a lid body formed to be convex upward using an elastic material, the lid body having a sealing portion formed thereon such that the same is inserted into the lid coupling groove along the periphery thereof so as to seal the inside of the container body; and a valve installed on the lid body so as to provide a passage, through which air inside the container body is discharged to the outside, and so as to expose/cover the passage.

A vacuum-sealed container wherein a large negative pressure is applied inside the container without using a pump, making it possible to store food for a long time; the container can be sealed without using a packing. The vacuum-sealed container includes: a container body having a lid coupling groove formed along the periphery of the upper end portion of an opening and arranged along a closed path; a lid body formed to be convex upward using an elastic material, the lid body having a sealing portion formed thereon such that the same is inserted into the lid coupling groove along the periphery thereof so as to seal the inside of the container body; and a valve installed on the lid body so as to provide a passage, through which air inside the container body is discharged to the outside, and so as to expose/cover the passage.

Apparatuses of the present invention create a backward pressure in fluid traversing a pipe, wherein the backward pressure within the pipe provides compression to the fluid effectively compressing entrapped gas bubbles within the fluid, allowing more accurate water meter measurements. The apparatus comprises a poppet valve having multiple springs to minimize or eliminate spring-binding caused by off-center hydraulic force during use.

A wireless communication safety break device is disclosed which has an upper safety break portion having a fuel inlet, an upper portion check valve, an upper portion communications device, an upper portion contact point or switch, and a lower safety break portion having a fuel outlet, a lower portion check valve, a lower portion contact point or switch, and a locator device.

A wireless communication safety break device is disclosed which has an upper safety break portion having a fuel inlet, an upper portion check valve, an upper portion communications device, an upper portion contact point or switch, and a lower safety break portion having a fuel outlet, a lower portion check valve, a lower portion contact point or switch, and a locator device.

A sprinkler configured for engagement with a coupling, the sprinkler including a raised lip end; and a distal end disposed opposite from the raised lip end, the sprinkler defining a raised lip between the distal end and the raised lip end, the sprinkler defining a groove between the raised lip and the distal end.