| 摘要 |
A springless valve that is used for a liquid sprayer has a body that has an upstream bore that has three parts with increasingly larger cross-sections. A pin portion of a slide/pin combination moves between an open position and a closed position. In the open position, liquid in the first part of the upstream bore flows into inlets in the third part of the upstream bore, through a central passage, to an outlet to a downstream bore. A linearly-moving slide portion on the slide/pin combination fits within a recess in the body, and has resilient arms that engage front and rear radial faces on a narrowed waist on the pin. The arms extend over opposed sides of the narrowed waist, have tangs that lock onto a lower side of that waist, and rigidly connect the slide portion to the pin portion, enabling a user to move the slide/pin combination axially between the open and closed positions. |
| 主权项 |
1. A springless valve that is used for a liquid sprayer and has:
a body that has: (a) a front section that has a downstream bore that communicates with a liquid nozzle, (b) a rear section that has an upstream bore that
(i) can be attached to a liquid supply line,(ii) has a first part that has a relatively small cross-sectional area that communicates with a liquid supply inlet,(iii) has a second part that is downstream of the first part and has a larger cross-sectional area than the first part, and(iv) has a third part that is downstream of the second part and has a larger cross-sectional area than the second part, and (c) spaced wall segments that extend from the front section to the rear section and define a recess; and a slide/pin combination that is mounted for axial movement with respect to the body between an open position and a closed position, and has: (a) a pin portion that has:
(i) a downstream section that fits within the downstream bore, has a first radial slot, and has a first o-ring that is mounted in the first radial slot and forms an upstream seal in the downstream bore,(ii) a first upstream section that fits snugly within the first part of the upstream bore when the slide/pin combination is in the closed position, and retracts into the second part of the upstream bore when the slide/pin combination is in the open position, enabling liquid in the first part of the upstream bore to flow into the second part of the upstream bore,(iii) a second upstream section that has a larger cross-sectional area than the first section, has a second radial slot, and has a second o-ring that is mounted in the second radial slot, provides a seal against the second part of the upstream bore when the slide/pin combination is in the closed position, and retracts into the third part of the upstream bore when the slide/pin combination is moved to the open position, permitting liquid in the second part of the upstream bore to flow into the third part of the upstream bore,(iv) a third upstream section that fits within the third part of the upstream bore, has a larger cross-sectional area than the second section, has a third radial slot, and has a third o-ring that is mounted in the third radial slot and forms a downstream seal in the third part of the upstream bore,(v) a central passage that extends from an outlet that is located downstream of the first o-ring to one or more inlets that are located between the second and third o-rings, and(vi) a narrowed waist that is located between the downstream section of the pin portion and the third upstream section of the pin portion and has front and rear radial faces, and (b) a slide portion that (i) fits with the recess in the body, (ii) has arms that snap around the narrowed waist, engage the front and rear radial faces on that waist, and connect the slide portion to the pin portion so that the slide portion does not rotate with respect to the axis of the slide/pin combination, and (iii) can be accessed by a user to move the slide/pin combination axially between the open and closed position. |
