Crossover-resistant plural component mixing nozzle
First Claim
1. A mixing and dispensing nozzle for use with a plural component dispenser, said nozzle having at least two passages therein for admitting at least first and second components of said material, said nozzle comprising, in combination, a forward end portion with a dispensing opening, a transition surface and a tubular body portion, a rear end wall portion which includes at least a pair of inlets, each inlet having a center passage therethrough, and at least two valve leaflets biased by their own inherent resiliency to a normally closed position and covering the openings in said passages afforded by said inlets, and at least one point of attachment formed between an interior surface of said rear end wall and said valve leaflets, said leaflets being able to be displaced from their normally closed position by the force of incoming liquid foam components.
1 Assignment
0 Petitions
Accused Products
Abstract
An anti-crossover nozzle with two principle pieces that snap together, having a forward end portion with a dispensing opening, a rear end portion which includes at least a pair of inlets. Each inlet has a center passage, therethrough and at least two valve leaflets biased by their own inherent resiliency to a normally closed position covering openings in the passages. There is at least one point of attachment formed between an interior surface of the rear end portion and the valve leaflets. The leaflets are displaced from their normally closed position by the force of incoming liquid foam components.
-
Citations
28 Claims
- 1. A mixing and dispensing nozzle for use with a plural component dispenser, said nozzle having at least two passages therein for admitting at least first and second components of said material, said nozzle comprising, in combination, a forward end portion with a dispensing opening, a transition surface and a tubular body portion, a rear end wall portion which includes at least a pair of inlets, each inlet having a center passage therethrough, and at least two valve leaflets biased by their own inherent resiliency to a normally closed position and covering the openings in said passages afforded by said inlets, and at least one point of attachment formed between an interior surface of said rear end wall and said valve leaflets, said leaflets being able to be displaced from their normally closed position by the force of incoming liquid foam components.
- 9. A mixing and dispensing nozzle comprising, in combination, a generally tubular body portion, a reduced diameter outlet portion, and a rear end portion having at least a pair of inlet openings extending outwardly from the rear end of said rear wall, said rear end portion also having an interior rear wall surface including a countersunk portion terminating in at least two relatively flat areas surrounding said inlet openings, respectively, a valve leaflet covering each of said inlet openings and being at least slightly smaller than said countersunk areas, and at least another portion of said countersunk area having a hold-down connection, insuring that the valve leaflet in use, will remain in place covering said inlets when acted upon by an internal pressure greater than the external pressure in said inlets.
-
18. A multi-piece, snap-together mixing and dispensing nozzle, said mixing and dispensing nozzle comprising, in combination, a first, forward component and a second, rearward component, said forward component having a dispensing opening at the forward end thereof, a substantially tubular main body portion, and a second, rearward component having a rear wall portion with at least a pair of inlets on said rear wall, one of said forward and rearward components having a pair of wings extending outwardly therefrom, said wings including flexible latching elements, and the other of said components having a pair of barbs thereon, with one of said components being an enlarged diameter unit and the other a reduced diameter unit, whereby said components will achieve a telescoping, snug radial fit between said components, and whereby said barb and said flexible latching elements will snap together to provide a snug, locking axial fit.
-
19. A nozzle as defined in clam 18, wherein one of said components includes a radially biased seal unit to insure said snug radial fit.
- 20. A multi-piece, snap-together mixing and dispensing nozzle for a chemical dispenser, said mixing and dispensing nozzle comprising, in combination, a first, forward component and a second, rearward component, said forward component having a dispensing opening at the forward end thereof, a substantially tubular main body portion, including at least two wing portions located forwardly of the rear end of the tubular side wall portion, and a pair of rearwardly opening recesses adjacent the roots of said wings, said recesses being defined in part by latching elements, and said second, rearward component having a rear wall portion with at least a pair of nipples extending rearwardly therefrom, passages extending through said nipples, a tubular forward extension surface, and a pair of barbs, each of which is congruent with at least a part of said recess, said barbs, said recesses and said flexible latching elements being constructed and arranged so that upon engagement, said flexible latching element will deflect and said barbs will extend into said recess.
Specification