초록 ▼

A pressure-responsive valve unit is received in the cavity of a valve assembly housing, the inner end of the cavity being connected with a fluid container. The valve unit includes a main body having a chamber containing a check valve body that is movable toward and away from engagement with a valve

A pressure-responsive valve unit is received in the cavity of a valve assembly housing, the inner end of the cavity being connected with a fluid container. The valve unit includes a main body having a chamber containing a check valve body that is movable toward and away from engagement with a valve seat on the main body, the valve seat facing the check valve body and the inlet end of the cavity, and the main body having passage means communicating fluid from the container to the front end portion of the check valve body. The check valve body is biased into engagement with the valve seat by a spring, the force of which is adjustable with a plug threaded into the inner end of the main body chamber. An outlet bore extends from the outer end of the main body to the valve seat, and the check valve body is engageable by a push rod inserted through said outlet bore.

대표청구항 ▼

A valve assembly for attachment to a fluid container, comprising: a valve casing having a cavity therein, the outer end of said cavity being open, and the inner end thereof being connected to receive fluid from said container; and a pressure-responsive valve unit received within said cavity, said va

A valve assembly for attachment to a fluid container, comprising: a valve casing having a cavity therein, the outer end of said cavity being open, and the inner end thereof being connected to receive fluid from said container; and a pressure-responsive valve unit received within said cavity, said valve unit including: a sleeve-like main body removably secured within said cavity, said main body having a chamber in the inner end portion thereof opening to the inner end of said cavity, outlet bore means extending from the outer end of said main body to said chamber, and a valve seat disposed about the inner end of said outlet bore means within said chamber; a cup-shaped adjuster plug removably secured within the open end of said chamber, and including a cylindrical side wall and an end wall; a check valve body received within said chamber and said cylindrical side wall of said adjuster plug, and slidable into and out of engagement with said valve seat, said check valve body having a central bore therethrough communicating the front end thereof with the region between said check valve body and said end wall of said adjuster plug, and including an abutment face on the front portion thereof adapted to engage said valve seat, and radial wall means spaced rearwardly from said abutment face; the portion of said check valve body disposed rearwardly of said radial wall means forming a sealed, sliding fit with said cylindrical side wall of said adjuster plug, said check valve body being in sealed engagement with said main body when said abutment face is in engagement with said valve seat, and said inner portion of said main body being provided with passage means for transmitting fluid from the inner end of said cavity to the region of said chamber forwardly of said radial wall means; and spring means positioned between said adjuster plug end wall and said check valve body, arranged to urge said abutment face into engagement with said valve seat, said adjuster plug being adjustable axially of said main body to adjust the pressure exerted by said spring means on said check valve body, whereby said check valve body will normally be in engagement with said valve seat to maintain said valve unit in a closed condition, said check valve body will move toward said adjuster plug end wall against the force of said spring means to open said valve unit when fluid pressure having a greater value than the setting of said spring means is admitted through said passage means and acts on said radial wall means, and said check valve body will be again seated by said spring means to close said valve unit when the value of said fluid pressure falls below the setting of said spring means.