초록 ▼

A drain fitting for bathtubs, sinks or the like has an annular body and a closure member which may be seated against the inlet end of a drain passage through the body. A stem extends from the closure member through a guide element within the drain passage and a spring acts between the stem and guide

A drain fitting for bathtubs, sinks or the like has an annular body and a closure member which may be seated against the inlet end of a drain passage through the body. A stem extends from the closure member through a guide element within the drain passage and a spring acts between the stem and guide element to apply sealing pressure to the seated closure member. The closure member may be manually pulled outwardly from the body against the force of the spring and turned angularly to latch the member at an open position when fluid is to be drained. The positive sealing force generated by the spring minimizes or avoids leakage under conditions where the forces of gravity and pressure from overlying liquid may be inadequate for the purpose.

대표청구항 ▼

In a drain fitting having an annular body adapted to be fitted into a drain opening and which defines a drain flow passage therethrough, a flow transmissive spider member attached to said body and extending across said drain flow passage, a closure member movable towards said spider and away therefr

In a drain fitting having an annular body adapted to be fitted into a drain opening and which defines a drain flow passage therethrough, a flow transmissive spider member attached to said body and extending across said drain flow passage, a closure member movable towards said spider and away therefrom between a closed position at which flow is blocked from said drain passage and an open position at which flow may enter said drain passage, the improvement comprising: spring means for resiliently urging said closure member towards said closed position thereof, latching means for selectively holding said closure member at said open position thereof in opposition to the force of said spring means, guide means secured to said spider member and having a guide passage which is coaxial with said drain passage, a stem extending from said closure member through said guide passage and having an end closure member, wherein said spring means includes a helical compression spring disposd coaxially on said end portion of said stem and being positioned to urge said end portion of said stem outwardly from said opposite side of said spider member, said spring means being proportioned to remain in a state of partial compression when said closure member is at said closed position thereof.