| 摘要 |
<p>A valve assembly (18) having both a primary low/fine product dispensing flow rate and a secondary high/coarse product dispensing flow rate. The primary low/fine product dispensing flow rate is achieved upon initial vertical depression of the valve stem (26) while the high/coarse product dispensing rate is achieved upon maximum vertical depression of the valve stem (26). An internal compressible member (80, 86) is located within the valve assembly (18) to provide a detectable indication, to an operator of the valve assembly (18), that further depression of the valve stem (26) will increase the product flow dispensing rate from the primary low/fine dispensing rate to the secondary high/coarse dispensing rate. The internal compressible member (80, 86) is either a compressible spherical ball (80), located captively within the biasing spring (28) between a lower surface of the valve stem (26) and a floor of the valve housing (22), or a compressible cylindrical sleeve (86) which captively surrounds the biasing spring (28) and is located between a lower surface of the valve stem (26) and a floor of the valve housing (22).</p> |
