초록 ▼

A liquid dispensing device including a body generally having an actuator cavity and a liquid passage. A valve seat element is connected to the body and a valve stem is mounted for movement within the body with respect to the valve seat element. Inner and outer magnetic elements are disposed around t

A liquid dispensing device including a body generally having an actuator cavity and a liquid passage. A valve seat element is connected to the body and a valve stem is mounted for movement within the body with respect to the valve seat element. Inner and outer magnetic elements are disposed around the periphery of the valve stem to couple the valve stem to the valve actuator. The inner magnetic element is connected to the valve stem for movement with the valve stem within the body. The outer magnetic element is connected with an actuator and is slidable within the body in response to, for example, pressurized air being applied against the actuator. The magnetic elements couple the valve stem to the actuator and eliminate the need for a dynamic seal between the valve stem and body.

대표청구항 ▼

[ What is claimed is:] [1.] A device for dispensing a liquid comprising:(a) a dispenser body having an actuator cavity, a liquid passage and a valve seat positioned within said liquid passage;(b) a valve stem mounted for movement in said liquid passage and said actuator cavity between an open positi

[ What is claimed is:] [1.] A device for dispensing a liquid comprising:(a) a dispenser body having an actuator cavity, a liquid passage and a valve seat positioned within said liquid passage;(b) a valve stem mounted for movement in said liquid passage and said actuator cavity between an open position and a closed position relative to said valve seat;(c) a first magnetic element connected to said valve stem and movable therewith;(d) a barrier between said actuator cavity and said valve stem, said barrier including a tubular member within said body, said tubular member encompassing a portion of said valve stem which is contained within said actuator cavity for preventing leakage of the liquid between said actuator cavity and said liquid passage;(e) an actuator mounted for movement within said actuator cavity and magnetically coupled to said first magnetic element, whereby movement of said actuator moves said first magnetic element and correspondingly moves said valve stem between said open position and said closed position; and(f) a lower spring mechanism and an upper cap operably connected to said body, said upper cap pushing said tubular member, the lower spring mechanism operably connected to said tubular member to yieldingly resist pushing of said tubular member by said upper cap. [17.] A method for dispensing adhesive from a device including a body having an adhesive passage with a dispensing orifice, a valve seat communicating with said dispensing orifice, a valve stem mounted for movement between open and closed positions relative to said valve seat, and an actuator cavity including an actuator for moving said valve stem, the method comprising:(a) sealing said adhesive passage from said actuator cavity by encompassing a portion of said valve stem in a slidably engaged tubular member and engaging an outside surface of said tubular member with an annular static seal element;(b) engaging said tubular member with a yieldingly resisting member positioned between said tubular member and said body;(c) magnetically coupling said valve stem to said actuator using at least one magnet; and(d) moving said actuator to thereby move the magnetically coupled valve stem to one of said open and closed positions. The method of claim 17, wherein magnetically coupling the valve stem to said actuator further comprises connecting a first magnet to a portion of said valve stem and magnetically coupling said first magnet to a second magnet connected with said actuator. The method of claim 17, wherein moving said actuator further comprises introducing pressurized air against a piston which forms part of said actuator.