A reciprocating plunger-type valve mechanism or assembly, which can be utilized in conjunction with adhesive dispensing applicators to control the dispensing of adhesive compositions which are to be used in connection with the bonding, securing, or fixation of pavement markers to road pavement surfaces, is disclosed. The mechanism or assembly comprises dual shutoff locations in connection with the supply of the incoming adhesive material so as to effectively reduce the prevailing pressure upon the shutoff blade controlling the adhesive material dispensing/discharge port whereby soft pressure starts and controlled deposition quantities are enabled while the generation of residual adhesive material or splatter is avoided.

A reciprocating plunger-type valve mechanism or assembly, which can be utilized in conjunction with adhesive dispensing applicators to control the dispensing of adhesive compositions which are to be used in connection with the bonding, securing, or fixation of pavement markers to road pavement surfaces, is disclosed. The mechanism or assembly comprises dual shutoff locations in connection with the supply of the incoming adhesive material so as to effectively reduce the prevailing pressure upon the shutoff blade controlling the adhesive material dispensing/discharge port whereby soft pressure starts and controlled deposition quantities are enabled while the generation of residual adhesive material or splatter is avoided.

A water valve and a drinking device are provided. The water valve includes an upper support, a lower support, a valve spool, a sealing member, a spring and a water outlet. The upper support is provided with a water inlet. The lower support is provided with a water outlet and a vent hole. The valve spool has a first end connected with the upper support and a second end fixedly connected with the lower support, and the valve spool is movable relative to the upper support, to switch on or off a communication between the water inlet and the water outlet. When the water valve is at a state of discharging water, an interior of the water outlet pipe is not communicated with atmosphere; when the water valve is at a state of not discharging water, the vent hole communicates the interior of the water outlet pipe with the atmosphere.

A water valve and a drinking device are provided. The water valve includes an upper support, a lower support, a valve spool, a sealing member, a spring and a water outlet. The upper support is provided with a water inlet. The lower support is provided with a water outlet and a vent hole. The valve spool has a first end connected with the upper support and a second end fixedly connected with the lower support, and the valve spool is movable relative to the upper support, to switch on or off a communication between the water inlet and the water outlet. When the water valve is at a state of discharging water, an interior of the water outlet pipe is not communicated with atmosphere; when the water valve is at a state of not discharging water, the vent hole communicates the interior of the water outlet pipe with the atmosphere.

The present invention relates to a treatment liquid supplying method and a substrate treating apparatus. The treatment liquid supplying method for a substrate treating apparatus provided with a nozzle configured to eject a treatment liquid, a pipe connected to the nozzle, an on-off valve provided on the pipe, and a suck back valve provided on the pipe between the nozzle and the on-off valve includes an ejection stopping step of stopping ejection of the treatment liquid from the nozzle by causing the on-off valve to perform closing operation, and a liquid cut-off position adjusting step of adjusting a liquid cut-off position as a position where the treatment liquid in a column shape ejected from the nozzle is cut off by causing the suck back valve to perform first suction operation in association with the closing operation by the on-off valve.

The present invention relates to a treatment liquid supplying method and a substrate treating apparatus. The treatment liquid supplying method for a substrate treating apparatus provided with a nozzle configured to eject a treatment liquid, a pipe connected to the nozzle, an on-off valve provided on the pipe, and a suck back valve provided on the pipe between the nozzle and the on-off valve includes an ejection stopping step of stopping ejection of the treatment liquid from the nozzle by causing the on-off valve to perform closing operation, and a liquid cut-off position adjusting step of adjusting a liquid cut-off position as a position where the treatment liquid in a column shape ejected from the nozzle is cut off by causing the suck back valve to perform first suction operation in association with the closing operation by the on-off valve.

The present injection apparatus is designed for replenishing embedded foundation preservation wraps with preservative whilst avoiding spillage. The injection apparatus comprises an injection bayonet having a lumen fluidly interfacing a plurality of preservative outlet nozzles along the injection bayonet and a preservative inlet fluidly interfacing the lumen. A portable preservative containing tank may be attached to the inlet via a flexible hose. The apparatus further comprises a syringe operating between the preservative inlet and the lumen. When replenishing the preservation wrap, the injection bayonet is inserted between the preservation wrap and the foundation so that preservative is configured to be supplied via the preservative inlet to flow out from the nozzles via the lumen to replenish the preservation wrap with the preservative. After replenishment, the lumen is purged of residual preservative using the syringe.

A liquid injection device includes a nozzle, a moving element and a control valve. The nozzle has a channel, a bypass passage and a suck back passage. The channel penetrates through the nozzle for injecting a working fluid. The channel has a liquid outlet. The bypass passage has a first opening, a switch-on position and a switch-off position. The suck back passage has a second opening between the first opening and the liquid outlet. The first opening and the second opening communicate with the channel. The moving element is disposed in the bypass passage. The control valve is disposed on the nozzle and controls the moving element to switch between the switch-on position and the switch-off position to open or close the channel. A suck back pump sucks the working fluid remaining between the first opening and the liquid outlet when the moving element is located at the switch-off position.

A liquid injection device includes a nozzle, a moving element and a control valve. The nozzle has a channel, a bypass passage and a suck back passage. The channel penetrates through the nozzle for injecting a working fluid. The channel has a liquid outlet. The bypass passage has a first opening, a switch-on position and a switch-off position. The suck back passage has a second opening between the first opening and the liquid outlet. The first opening and the second opening communicate with the channel. The moving element is disposed in the bypass passage. The control valve is disposed on the nozzle and controls the moving element to switch between the switch-on position and the switch-off position to open or close the channel. A suck back pump sucks the working fluid remaining between the first opening and the liquid outlet when the moving element is located at the switch-off position.

A system for replenishing embedded foundation preservation wraps with preservative comprises an embedded foundation, a preservation wrap, and injection apparatus configured to be inserted between the wrap and the foundation. The injection apparatus includes a profiled backing plate and a semicylindrical tube portion defining a lumen therebetween, with a preservative inlet and a plurality of outlet nozzles along a distal bayonet fronting portion. A syringe with a reciprocating plunger operates within the lumen to enable controlled delivery of preservative and purging of residual preservative after use. The plunger may be locked in retracted, inserted, or blocking positions to manage flow and prevent leakage.