Valves, and particularly check valves, are detailed. The valves may isolate a spring or other biasing member from flowing fluid so as to reduce the possibility of damage to the spring caused, for example, by chemicals contained in the fluid. In some versions of the valves, the spring may be positioned within a cavity of a cover sealed from the fluid.
1. A valve comprising:
a. a diverter member (i) movable between an open position facilitating fluid flow therebeyond and a closed position inhibiting fluid flow therebeyond and (ii) comprising a flapper having a plurality of bores;
b. means, (i) indirectly connected to the diverter member and (ii) isolated from the fluid flow, for biasing the diverter member toward the closed position;
c. a bail configured to contact the flapper at times during use;
d. a pin received by (i) the bores of the flapper and (ii) bores of the bail; and
e. a pivot link connected to (i) the biasing means and (ii) the pin.
2. A valve according to claim 1 further comprising a cover having a cavity therein and in which the biasing means is placed inside the cavity.
3. A valve according to claim 2 in which (i) the biasing means comprises a coil spring and (ii) the cover comprises a plurality of bores.
4. A valve according to claim 2 further comprising means for covering the cavity.
5. A valve comprising:
a. a diverter member (i) movable between an open position facilitating fluid flow therebeyond and a closed position inhibiting fluid flow therebeyond and (ii) comprising a flapper having a plurality of bores;
b. means, (i) indirectly connected to the diverter member, (ii) isolated from the fluid flow, and (iii) comprising a coil spring, for biasing the diverter member toward the closed position;
c. a cover (i) comprising a plurality of bores and (ii) having a cavity therein, and in which the biasing means is placed inside the cavity;
d. a pin received by the bores of (i) the flapper and (ii) the cover;
e. a pivot link connected to (i) the coil spring and (ii) the pin; and
f. a plurality of seals configured to receive the pin on opposite sides of the pivot link.
6. A check valve configured for use as part of a water-recirculation system of a swimming pool, spa, or hot tub, the valve comprising:
a. a cover configured for attachment to a housing and comprising (i) a plurality of bores and (ii) a cavity isolatable from water of the water-recirculation system;
b. a flapper from which at least one arm extends, the at least one arm comprising a bore;
c. a coil spring having (i) a first end anchored within the cavity and (ii) a second end;
d. means, comprising a covering section, for covering the cavity;
e. a pivot link connected to the second end of the coil spring;
f. a pin (i) received by the bores of the cover and the at least one arm, (ii) connected to the pivot link, and (iii) having D-shaped ends;
g. a plurality of seals (i) receiving the pin and (ii) positioned on opposite sides of the pivot link; and
h. a bail comprising a plurality of legs, each leg defining a D-Shaped bore for snugly receiving a D-shaped end of the pin.