Patent ID: 8905272

Claim:
A fluent material dispenser comprising: a reservoir configured to contain a fluent material therein; a dispensing assembly fluidly cooperative with said reservoir and comprising a sealing arrangement such that in a first operating condition, a rotating valve in contact with said sealing arrangement permits a metered portion of said fluent material to be accepted by said dispensing assembly from said reservoir, while in a second operating condition, said rotating valve permits said dispensing assembly to discharge said metered portion of said fluent material from said dispenser such that both of said operating conditions inhibit at least a portion of said fluent material remaining in said reservoir from escaping therefrom, said sealing arrangement comprising a tandem seal set disposed between said rotating valve and a discharge flowpath formed therearound such that a first tandem seal of said tandem seal set is placed in selective fluid communication with said metered portion of said fluent material during a portion of a rotational arc formed by rotational movement of said rotating valve relative to said reservoir, and wherein a second tandem seal of said tandem seal set defines an undulated non-planar profile when placed against said rotating valve; a top cap configured to engage said reservoir such that once said fluent material has been placed within said reservoir, said top cap effects tamper resistant closure of said aperture; and a bottom cap configured to engage said dispensing assembly to cover a dial used to actuate said rotating valve and a discharge aperture that is fluidly cooperative with said dispensing assembly.