초록 ▼

A toggle linkage check valve including a housing having an inlet and an outlet and a sealing plug disposed within the housing and adapted for movement between a first, closed position for preventing flow of liquid between the inlet and the outlet, and a second, open position for substantially permit

A toggle linkage check valve including a housing having an inlet and an outlet and a sealing plug disposed within the housing and adapted for movement between a first, closed position for preventing flow of liquid between the inlet and the outlet, and a second, open position for substantially permitting flow of liquid between the inlet and the outlet. The check valve includes a spring assembly removably disposed within the housing. The sealing plug is mounted upon the spring assembly. The spring assembly includes a rod member and a means for biasing the rod member toward the sealing plug. In the first position of the sealing plug, the rod member lies substantially perpendicular to a plane of the sealing member across the inlet, and in the second position of the sealing plug, the rod member lies at an acute angle to the plane of the sealing member. The means for biasing acts upon the rod member to apply, to the sealing plug, a biasing force of a second degree less than the first degree, whereby the spring assembly acts upon the sealing plug to provide a maximum resistance against liquid flow from the inlet toward the outlet when the sealing plug is in the first, closed position and a lesser resistance against liquid flow when the sealing plug is in the second, open position.

대표청구항 ▼

A toggle linkage check valve comprising: a housing having an inlet and an outlet; a sealing plug disposed within said housing and adapted for movement between a first, closed position for preventing flow of liquid between said inlet and said outlet, and a second, open position for substantially perm

A toggle linkage check valve comprising: a housing having an inlet and an outlet; a sealing plug disposed within said housing and adapted for movement between a first, closed position for preventing flow of liquid between said inlet and said outlet, and a second, open position for substantially permitting flow of liquid between said inlet and said outlet; and a spring assembly removably disposed within said housing, said sealing plug mounted upon said spring assembly, said spring assembly comprising a rod member and a means for biasing said rod member toward said sealing plug, in said first position of said sealing plug, said rod member lying substantially perpendicular to a plane of said sealing member across said inlet, and in said second position of said sealing plug, said rod member lying at an acute angle to said plane of said sealing member, with said means for biasing acting upon said rod member to apply, to said sealing plug, a biasing force of a second degree less than said first degree, whereby said spring assembly acts upon said sealing plug to provides a maximum resistance against liquid flow from said inlet toward said outlet when said sealing plug is in said first, closed position and a lesser resistance against liquid flow when said sealing plug is in said second, open position.