Abstract: A two-chamber viscous product dispenser which includes a stationary, transversely offset, longitudinally extending discharge spout. A depressible discharge pump actuator is mounted on the container and has extended and retracted positions. A spring biased cover having a cap overlies the discharge opening of the spout and a lever at the opposite end is in movable engagement with the actuator. A rib on the spout serves as a fulcrum for the body of the cover such that when the actuator is retracted, the cap uncovers the discharge opening.

Abstract: A two-chamber viscous product dispenser has an internal valve element which includes integral inlet and outlet check valves for the valving of product into the pump chamber and from the pump chamber through a stationary spout. The outlet valve may be in the form of a flap valve having resilient webs for spring biasing the valve to its closed position. Otherwise, the outlet valve may be plate like capable of deforming when opening.

Abstract: A viscous product dispenser has a positive discharge valve which is opened upon a lost motion arrangement between the spout and the pump piston at the initial actuation of the spout. The lost motion is effected by spaced apart stops on these two members permitting limited sliding movement relative to the pump piston for opening the discharge valve before the pumping movement of the piston. A piston return spring is external to the pump chamber for biasing the discharge valve to a closed position.A stop ring on the piston head may be provided for bearing engagement with an end wall of the container on which the container is mounted for isolating the load on the piston.

Abstract: A manually actuated liquid sprayer has an element mounted on its nozzle for movement parallel to the axis of the discharge orifice between retracted and extended positions relative to the front wall of the nozzle, the element having a thickness not greater than the lateral extent thereof, lying against the front wall in the retracted position and being spaced from such wall in the extended position. The element has an open port coaxial with the discharge orifice and of a size greater than that of the orifice, the element comprising a mitigating element for mitigating the divergent spray issuing from the orifice.

Abstract: Spray discharge from a liquid sprayer is enhanced through a turbulent effect created by a ported baffle defining an air plenum into which air is induced to flow into the spray plume as it emerges from the discharge orifice causing the particles to collide and mix with the emerging spray. The baffle port is sized to match the divergence angle of the spray plume which essentially fills the port upon entry such that the air in the gap between the orifice and the port is driven through the port by impingement of the spray particles and entrainment of the air into the plume from the gap, while preventing any backflow of air through the port.

Abstract: A dispensing pump of the pressure accumulating type includes a reciprocable plunger/accumulator having a discharge valve coaxial with an inlet check valve carried by a stationary pump piston, the valves bearing directly against one another so as to close each other at the end of the plunger downstroke to thereby control the output of the pump.

Abstract: The trigger actuated pump sprayer has a nozzle cap which surrounds a unitary element and forms a spin chamber therewith, the element having an integrally connected spring and biased discharge check valve and including a plurality of supply channels, the nozzle cap being rotatable without axial displacement relative to the element and containing a plurality of tangential openings being arranged relative to the channels for controlling the swirl velocity in the spin chamber, upon cap rotation, and thus the pattern range of discharge through the discharge orifice from an OFF position.

Abstract: A liquid dispensing pump in the form of a trigger sprayer includes a thimble-shaped valving element containing inlet and outlet valves, and located within a cylindrical portion of the pump body. In one embodiment, a pressure accumulation chamber is defined between the pump body and the valving element, and a pump piston operates within the valving element and defines therewith a pump chamber in open communication with the accumulation chamber via spaced, flexible and extendable straps which interconnect the inlet and outlet valves for permitting a portion of the valving element to move axially into a discharge valve opening position. Vent valving is effected by either the pump piston or the valving element during inward reciprocation movement of the piston. In another embodiment, the sprayer is converted into a throttle pump by the provision of a pump piston which operates within the cylindrical portion of the pump body.

Abstract: A liquid foam dispenser having a porous foamer element includes a liquid passage and a distributor for distributing the liquid across the outer surface of the foamer element during actuation, an air passage for transmitting pressurized air during actuation through the foamer element pores for generating a foam on or from the outer surface of the foamer element, and a separate vent passage permitting a rapid recovery of the container during depressurization.

Abstract: A dispenser of the pressure accumulated type includes a unitary pump plunger actuated for reciprocation within a variable volume pump chamber defined by an accumulator which is displaced upon an accumulation of pressure for opening the discharge as a discharge valve thereon becomes unseated, the compression stroke of the plunger acting in a direction opposite displacement of the accumulator in a direction opening the discharge.

Abstract: A dual chamber continuous discharge dispenser includes relatively movable pump piston and pump cylinder during compression and the compression strokes and together defining a variable volume pump chamber which comprises part of an encircling accumulator element which is displaced during the compression stroke for opening the discharge. A wall on the accumulator having a valve-controlled opening prevents return flow of product from an accumulation chamber back into the pump chamber during the discharge of product from the accumulation chamber.

Abstract: A designer's triangle which permits completion of a drawing with the use of a single instrument includes a planar sheet having three external edges forming a triangle with angles of 45.degree., 60.degree. and 75.degree., respectively. The planar sheet defines three-sided first and second internal triangular cutout openings having respective edges lying along perpendiculars to edges of the external triangle and a trisector of the 45.degree. angle. In some preferred embodiments these perpendiculars intersect at a common point and may constitute altitudes of the external triangle.

Abstract: A nozzle insert for an actuator head of a fluid dispenser includes a circular body having a central portion containing a discharge orifice, and an annular, conical flange extending radially outwardly from such central portion and being radially flexible relative thereto. The insert is seated within a smooth, cylindrical head bore having a constant diameter, and engages a cylindrical probe on the head concentric to the bore. An end wall of the flexible, conical flange faces outwardly of the bore and presents a sharp outer peripheral edge of a diameter slightly greater than the bore diameter. And, the insert body is of a harder material than that of the actuator head, so that the conical flange defines a circular, self-locking pawl for positively locking the insert fully seated within the bore as the sharp peripheral edge penetrates into the bore wall.

Abstract: A dispensing pump of the pressure accumulating type includes an assembly of a pump body and a separate piston member, the body including a closure cap for securing the assembly in fluid tight communication with the opening of a container of flowable product to be dispensed, a plunger/accumulator forming a variable volume pump chamber together with the piston and being reciprocable relative thereto, and a plunger head surrounding the plunger. The plunger has a vent seal for opening and closing a vent chamber defined around the piston. The closure cap is of a hard and durable material, while the separate piston is softer and more compliant which gives its lip seal good definition which avoids pump chamber leakage as it precisely conforms to the inner diameter of the plunger and to any irregularities thereof.

Abstract: A dispensing fitment for squeeze bottles includes a combined discharge and vent passage for establishing communication between the atmosphere and the interior of the bottle, the fitment defining a pair of oppositely facing, annular valve seats of different diameters, and further including an annular resilient diaphragm valve extending across the combined discharge and vent passage while being unattached to the fitment and normally being axially compressed against both valve seats for closing the passage. The valve is deflected to a discharge open position in which it is unseated from one of the valve seats when the pressure within the bottle exceeds atmospheric and the valve is deflected to a vent open position in which it is unseated from the other of the valve seats when the pressure within the bottle is reduced below atmospheric.

Abstract: A dispensing pump is adapted for pressure filling and includes a fluid filling passage which remains sealingly closed during pumping operation by the provision of an annular valve skirt in sealing engagement with a wall of the fluid filling passage, such skirt inwardly flexing during charging the container permitting the charged fluids to by-pass the valve and enter the container. The valve skirt depends from either the plunger head or from the plunger. When depending from the plunger, the valve skirt functions as a guide element for the plunger head together with a plunger head retention bead which cooperates with a pump body retention bead in limiting the upward movement of the plunger head to a predetermined extent. These guide members serve to isolate the plunger against the influence of lateral or eccentric forces applied against the plunger head during its reciprocation.

Abstract: A liquid dispensing pump is capable of being locked in one embodiment in a fully raised position of the plunger, in another embodiment in a fully depressed position of the plunger and in a further embodiment in a fully raised and/or fully depressed position of the plunger relative to the pump body. Each pump has a vent chamber which is closed in the locked position to avoid leakage of product from the container, and which is opened by a depending skirt on the plunger as it moves into juxtaposition to an enlarged diameter section in the vent chamber.

Abstract: A dispensing pump of the pressure accumulating type includes a reciprocable plunger/accumulator which is free floating between spring force below and hydraulic force above and is unrestrained against movement in response to these forces, and/or which has at its upper end by an air displacement interfacing contour which avoids after spray as discharge valve closing is mechanically assisted at the end of the discharge stroke.

Abstract: Discharge valving for a liquid dispensing pump having a reciprocable plunger is in the form of a laterally extending bunsen valve having an annular spring washer which resiliently bears against an annular valve seat adjacent the discharge opening. The loading of the valve is controlled by valve positioning lugs between the top of the plunger and an overlying plunger head. The plunger may be immobilized in a fully raised position above the pump body or in a fully depressed position relative to the pump body by locking fingers positively deflected into and out of the path of reciprocation of a stop shoulder on the plunger head.

Abstract: A liquid dispensing pump in the form of a trigger sprayer includes a thimble-shaped valving element containing inlet and outlet valves, and located within a cylindrical portion of the pump body. In one embodiment, a pressure accumulation chamber is defined between the pump body and the valving element, and a pump piston operates within the valving element and defines therewith a pump chamber in open communication with the accumulation chamber via spaced, flexible and extendable straps which interconnect the inlet and outlet valves for permitting a portion of the valving element to move axially into a discharge valve opening position. Vent valving is effected by either the pump piston or the valving element during inward reciprocation movement of the piston. In another embodiment, the sprayer is converted into a throttle pump by the provision of a pump piston which operates within the cylindrical portion of the pump body.