Patent Publication Number: US-2022234063-A1

Title: Manually operated dispensing pump

Description:
FIELD OF THE INVENTION 
     Manually operated dispensing pumps. 
     BACKGROUND OF THE INVENTION 
     Manually operated dispensing pumps are the preferred fluid delivery system for many products such as hand soap, hand sanitizer, dish detergent, shampoo, surface cleaning products, plant care products, scent products, liquid food products, flavorings, and the like. Consumers find these kind of dispensers convenient to use, perform reliably, and are relatively inexpensive. 
     Manually operated dispensing pumps include many individual parts. For example, a manually operated dispensing pump may include a dip tube, a pump chamber, a piston, a trigger, a nozzle, a spring, and various valves. To simplify recycling of manually operated dispensing pumps, various mechanical designs in which the pumps are fabricated from all plastic materials have been proposed. One limitation of these designs is that the spring mechanism for reloading the pump chamber is complicated to design and manufacture. 
     With these limitations in mind, there is a continued unaddressed need for manually operated dispensing pumps that include spring mechanisms that are simple to design, manufacture, and manageable in the recycling stream. 
     SUMMARY OF THE INVENTION 
     A manually operated pump comprising: an inlet one-way valve; a pump chamber downstream of and in fluid communication with said inlet one-way valve; a piston interior to said pump chamber and slideably engaged with said pump chamber; an actuator engaged with said piston or said pump chamber; and a block thermoplastic elastomeric spring engaged with said actuator to move said actuator as said block thermoplastic elastomeric spring relaxes. Optionally, the pump further comprises an outlet one-way valve downstream of and in fluid communication with said pump chamber. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1 . Pump dispenser. 
         FIG. 2 . Trigger sprayer. 
         FIG. 3 . Pump dispenser cross section. 
         FIG. 4 . Exploded view of a portion of a pump dispenser. 
         FIG. 5 . Nonlimiting example of block thermoplastic elastomeric spring. 
         FIG. 6 . Pump dispenser having the block thermoplastic elastomeric spring outside the pump chamber. 
         FIG. 7 . Trigger sprayer having a hinge. 
         FIG. 8 . Trigger sprayer operable by a linear pull. 
         FIG. 9 . Portion of a trigger sprayer. 
         FIG. 10A . Exploded view of an unmobilized compression spring. 
         FIG. 10B . Unmobilized compression spring. 
         FIG. 10C . Mobilized compression spring. 
         FIG. 11 . Compression spring having a plurality of spring elements. 
         FIG. 12 . Pump dispenser having a compression spring having a plurality of spring elements. 
         FIG. 13A . Series of block thermoplastic elastomeric springs separated by stress concentrators. 
         FIG. 13B . Series of block thermoplastic elastomeric springs separated by stress concentrators having openings through which flow of liquid can occur. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Two common types of manually operated pumps for dispensing products are pump dispensers and trigger sprayers. Pump dispensers are commonly employed to dispense low viscosity liquids, high viscosity liquids, gels, sprays, or foams. Trigger sprayers are commonly employed to dispense low viscosity liquids, sprays, and foams. 
     A pump dispenser  1  is shown in  FIG. 1 . The pump dispenser  1  is engaged with a container that contains the material to be dispensed. Pump dispensers are typically operated by pressing an actuator  10  in a direction that is aligned with the direction that the piston of the manually operated pump moves. Manually operated pumps are usually provided with a housing  20  within which the internal parts of the manually operated pump are contained. In a simple construction, the dispenser outlet  30  is integral with the actuator  10 . Such an arrangement is simple to manufacture, reduces the complexity of the plumbing, and limits the number of separate parts that must be assembled. When the user discharge strokes the actuator  10 , both the actuator  10  and the dispensing outlet  30  integral therewith move and material is discharged from the dispenser outlet  30 . A spring mechanism is loaded to store energy when the actuator  10  is stroked. The discharge stroke is commonly a push down stroke. When the force applied to the actuator  10  is reduced or released, the spring mechanism releases the stored energy by unloading and drives the reload stroke. During the reload stroke, the pump chamber is reloaded with the material that is to be dispensed by a subsequent discharge stroke. The piston reciprocates rectilinearly relative to or within the pump chamber to discharge liquid or gel from and reload liquid or gel into the pump chamber. The dispenser outlet  30  can optionally be positioned off of actuator  10  so that the dispenser outlet  30  does not move when the actuator  10  moves. Such an arrangement may be practical if a stationary dispenser outlet  30  is more convenient to the user. The dispenser outlet  30  for a pump dispenser  1  can be an open end of the conduit leading to the dispenser outlet  30 . Optionally, the dispenser outlet  30  may include a structure to modify the flow from the conduit leading to the dispenser outlet  30  as the flow exits the dispenser outlet  30 . Structures that can be employed include a nozzle, a vented nozzle, a nozzle combined with a swirl chamber, a screen, or other constriction or obstruction to create the desired characteristic of the material as it exits the dispenser outlet  30 . 
     A trigger sprayer  2  is shown in  FIG. 2 . Trigger sprayers  2  operate on the same principles as pump dispensers  1  in that a trigger  40  is pressed to move the piston of the pump relative to the pump chamber. Trigger sprayers  2  tend to have more flexibility in how the actuator  10  can move the piston, as compared pump dispensers  1 . The trigger  40  may reciprocate rectilinearly or may reciprocate about a hinge. Various structures that connect the trigger  40  to the piston are possible so that the piston may reciprocate rectilinearly within or relative to the pump chamber. When the user discharge strokes the trigger  40 , material is discharged from the dispenser outlet  30 . A spring mechanism is loaded to store energy when the trigger  40  is discharge stroked. Like the pump dispenser  1 , the spring mechanism releases the stored energy by unloading and drives the reload stroke. The reload stroke reloads the pump chamber with the material to be dispensed by a subsequent discharge stroke. Liquid is discharged from the pump chamber and reloaded into the pump chamber as the piston reciprocates rectilinearly relative to the pump chamber. The dispenser outlet  30  for a trigger sprayer can be the same as those described above for pump dispensers  1 . Most commonly, the dispenser outlet  30  for trigger sprayers  2  is structured to deliver a jet of liquid, cone or other shape of spray, or foam. 
     A cross section of a pump dispenser  1  is shown in  FIG. 3 . The pump dispenser  1  includes a manually operated pump  3 . The manually operated pump  3  per se is common to both a pump dispenser  1  and trigger sprayer  2 , the difference between the pump dispenser  1  and trigger sprayer  2  being in how the manually operated pump  3  is operated by the user and structures provided to create the desired characteristics in the material discharged from the dispenser outlet  30 . 
     The manually operated pump  3  comprises the basic elements of an inlet one-way valve  50 , a pump chamber  60 , a piston  70 , actuator  10 , and spring mechanism  80 . The pump can optionally comprise an outlet one-way valve  90 . In operation, liquid or gel is drawn from a container to which the manually operated pump  3  is in fluid communication with, for example via a dip tube. The liquid or gel passes though the inlet one-way valve  50  into the pump chamber  60 . The inlet one-way valve  50  permits flow in the downstream direction from the container or dip tube to the one-way valve  50  to the pump chamber  60  and prevents flow in the upstream direction. The pump chamber  60  is downstream of and in fluid communication with the inlet one-way valve  50 . The piston  70  is interior to the pump chamber  60  and is slideably engaged with the pump chamber  60 . The actuator  10  is engaged with the piston  70  or pump chamber  60 . Liquid or gel discharged from the pump chamber is discharged through the dispenser outlet  30 . If an outlet one-way valve  90  is provided, liquid or gel discharged from the pump chamber  60  passes through the optional outlet one-way valve  90  on its way to the dispenser outlet  30 . The optional outlet one-way valve  90  is downstream of and in fluid communication with the pump chamber. The optional outlet one-way valve  90  permits flow in the downstream direction from the pump chamber  60  to the dispenser outlet  30  and prevents flow in the upstream direction. 
     The inlet one-way valve  50  and optional outlet one-way valve  90  can be a free-floating ball check valve. A free-floating ball check valve can comprise a ball housed within a valve chamber and the ball is sized and dimensioned to conform with an entryway to the valve chamber. Liquid or gel flowing into the valve chamber dislodges the ball from being seated in the entryway to the valve chamber. The valve chamber exit is sized and dimensioned to restrain the ball within the valve chamber. Optionally, the inlet one-way valve  50  and optional outlet one-way valve  90  can be independently selected from the group consisting of a free-floating ball check valve, spring-loaded ball check valve, a diaphragm check valve, a swing check valve, a flapper valve, a clapper valve, a backwater valve, a lift check valve, an in-line check valve, an umbrella valve, and a duckbill valve. An outlet one-way valve  90  is optional. Including an outlet one-way valve  90  can be desirable if a liquid is to discharged as a spray, either by way of a pump dispenser  1  or trigger sprayer  2 . The outlet one-way valve  90  can provide for the development of a high enough pressure to form the spray and a shutoff to avoid dripping below a selected pressure. 
     As described above, the piston  70  is interior to the pump chamber  60  and slideably engaged with the pump chamber  60 . That is, the piston  70  and the pump chamber  60  are moveable relative to one another. The piston  70  can be moveable within a stationary pump chamber  60 , which is a practical approach. Optionally, the pump chamber  60  can be moveable with respect to a stationary piston  70 . 
     The piston  70  can conform to the interior surface of the pump chamber  60 . A gasket or piston skirt  74  can be positioned between the piston  70  and interior surface of the pump chamber  60  to provide a seal between the piston  70  and pump chamber  60 . The gasket or piston skirt  74  can be connected to one of the piston  70  or pump chamber  60 . Pressure developed in the liquid or gel within the pump chamber  60  can drive liquid or gel towards the dispenser outlet  30 . If an outlet one-way valve  90  is provided the pressure developed in the liquid or gel within the pump chamber  60  can drive liquid or gel through the outlet one-way valve  90 . The outlet conduit  110  for flow from the pump chamber  60  can comprise a piston bore  120  through the piston crown  130 , piston skirt  74  and piston rod  140  of the piston  70 . The piston bore  120  is an open bore through which flow of liquid or gel can occur. The piston  70  can comprise a piston crown  130 , a piston skirt  74  extending from the piston crown  130  to the piston rod  140  and in conformance with the interior surface of the pump chamber  60 . Optionally, an outlet conduit  110  from the pump chamber  60  can be provided separate from the piston  70 . For example, the outlet conduit  110  can be an open tube connected to the interior of the pump chamber  60 . 
     If provided, the optional outlet one-way valve  90  can be at the entrance of the outlet conduit  110 , within the outlet conduit  110 , or at the exit of the outlet conduit  110 . The outlet conduit  110  is downstream of the pump chamber  60 . The outlet conduit  110  can be described as being downstream of the pump chamber  60 . If an outlet one-way valve  90  is provided, the outlet conduit  110  can be described as being downstream of the outlet one-way valve  90 . The outlet conduit  110  can lead to a dispenser outlet  30  downstream of the outlet conduit  110 . The dispenser outlet  30  can comprise a nozzle, a vented nozzle, a nozzle combined with a swirl chamber, a screen, or other constriction or obstruction to create the desired characteristic of the material as it exits the dispenser outlet  30 . 
     The actuator  10  can be engaged with the piston  70  or pump chamber  60 , depending on the mechanism for providing movement of the piston  70  and pump chamber  70  relative to one another. The actuator  10  can be pressed to actuate movement of the piston  70  and pump chamber  60  relative to one another. In a reasonably practical arrangement, the actuator  10  is engaged with the piston  70  to drive movement of the piston  70  within a stationary pump chamber  70 . That is the piston  70  can move relative to a stationary pump chamber  70 . 
     The actuator  10 , outlet conduit  110 , and optional outlet one-way valve  90  together can be rectilinearly moveable to drive the piston  70 . The user may cyclically press and release the actuator  10  to dispense liquid or gel from the container to which the pump dispenser  1  is attached. The actuator  10  can be integral with the outlet conduit  110 . The actuator  10  can be joined to the outlet conduit  110  as compression fitted parts, snap together parts, glued parts, solvent welded parts, thermal bond parts, screwed together parts, interlocking parts, or other alternative for joining two parts to one another. Similarly, the optional outlet one-way valve  90  and outlet conduit  110  may be joined to one another by way of the same structural relationships described for joining the actuator  10  and outlet conduit  110  or be integral with the actuator  10 . And the piston  70  can be joined to the optional outlet one-way valve  90  by way of the same structural relationships described for joining the actuator  10  and outlet conduit  110  or be integral with the optional outlet one-way valve  90 . 
     The spring mechanism  80  can be a block thermoplastic elastomeric spring  150 . The block thermoplastic elastomeric spring  150  can be engaged with the actuator  10  to move the actuator  10  as the block thermoplastic elastomeric spring  150  relaxes. The block thermoplastic elastomeric spring  150  can be loaded and unloaded in concert with the actuator  10  being pressed to load the block thermoplastic elastomeric spring  150  and released to unload the block thermoplastic elastomeric spring  150 . The actuator  10  can be considered to have an upstroke position and a downstroke position, the upstroke position being associated with liquid or gel having been drawn into the pump chamber  60  from the container and the downstroke position being associated with liquid or gel having been discharged from the pump chamber  60 . The block thermoplastic elastomeric spring  150  can relax in that stored potential energy is converted into kinetic energy to move the actuator  10  from the downstroke position to the upstroke position. The block thermoplastic elastomeric spring  150  can be engaged with the actuator  10  to move the actuator  10  as the block thermoplastic elastomeric spring  150  relaxes or rebounds subsequent to compression. In use, the user presses the actuator  10  to compress the block thermoplastic elastomeric spring  150  and move the piston  70  and pump chamber  60  relative to one another in discharge stroke until the actuator is at its downstroke position. The user then releases the actuator  10  and the block thermoplastic elastomeric spring  150  rebounds to move the piston  70  and pump chamber  60  relative to one another in a recharge stroke until the actuator is at its upstroke position. 
     The block thermoplastic elastomeric spring  150  can be positioned within the pump chamber  60 , as shown in  FIG. 3 . In such an arrangement, the block thermoplastic elastomeric spring  150  is contact with the liquid or gel that passes through the pump chamber  60 . 
     Historically, metal or plastic coil springs have been used as the spring mechanism  80 . Coil springs can be inconvenient or expensive to manufacture. Complicated machinery may be required to grab, manipulate, and position a coil spring in a manually operated pump  3 . Coil springs also may not be chemically compatible with the liquid or gel that the manually operated pump  3  is designed to dispense. Moreover, coil springs are commonly formed of a material that differs from the material that constitutes other parts of the manually operated pump  3 . Employing a block thermoplastic elastomeric spring  150  can improve the recyclability of a manually operated pump  3  since particular components of the spring mechanism  80  may not need to be separated out or may be easily separated out in conventional recycling processes. Once the manually operated pump  3  has reached the end of its design life, it may be placed in the recycling stream and separation of the materials that constitute the manually operated pump  3  may be simplified. 
     A block thermoplastic elastomeric spring  150  is not a coil or a coil spring. A block thermoplastic elastomeric spring  150  is a coiless spring. That is, the block thermoplastic elastomeric spring  150  can be a coiless block thermoplastic elastomeric spring  150 . The block thermoplastic elastomeric spring  150  can be without a coiled structure or a spring in which a coil is not present. 
     A block thermoplastic elastomeric spring  150  can be a block of thermoplastic elastomer material. A thermoplastic elastomer is an elastomer comprising a thermoreversible network. An elastomer is a polymer that displays rubber-like elasticity. Elastomers have weak intermolecular forces. The block thermoplastic elastomeric spring  150  can comprise more than 50% thermoplastic elastomer material, by weight of the block thermoplastic elastomeric spring  150 . The block thermoplastic elastomeric spring  150  can comprise more than 90%, or even 100%, thermoplastic elastomer material, by weight of the block thermoplastic elastomeric spring  150 . The thermoplastic elastomer material can be cross-linked or non-crosslinked. 
     The thermoplastic elastomer material can be selected from the group consisting of thermoplastic styrenic block copolymers (TPS), thermoplastic polyolefin elastomers (TPO), thermoplastic elastomer vulcanizates (TPV), thermoplastic polyurethane elastomers (TPU), thermoplastic copolyester elastomers (TPC), thermoplastic polyamide elastomers (TPA), non-classified thermoplastic elastomers (TPZ), and combinations thereof. 
     The block thermoplastic elastomeric spring  150  can have a density greater than or less than 1 g/cm 3 . The thermoplastic elastomer material per se constituting the block thermoplastic elastomeric spring  150  can have a density greater than 1 g/cm 3 . Density of the block thermoplastic elastomeric spring  150  and thermoplastic elastomer material per se can be increased to a desired level by including densifier materials. Optionally, the density of the block thermoplastic elastomeric spring  150  and thermoplastic elastomer material per se can be decreased to a desired level by including lightweight fillers or using a foam structure. Moreover, the density of the block thermoplastic elastomeric spring  150  and thermoplastic elastomer material per se can be designed so that the part or material thereof floats or sinks, as desired or intended, in water or other aqueous or liquid medium to facilitate separation of the part or material in a float separation process used in a recycling process for mixed materials. 
     Optionally, the block thermoplastic elastomeric spring  150  can have a density less than 1 g/cm 3 . Optionally, the thermoplastic elastomer material per se constituting the block thermoplastic elastomeric spring  150  can have a density less than 1 g/cm 3 . Such a block thermoplastic elastomeric spring  150  or thermoplastic elastomer material per se will float in water and can be practically separated from materials that sink. 
     The block thermoplastic elastomeric spring  150  can have an actuator facing surface  152  and an opposing reaction surface  153 . The actuator facing surface  152  can be oriented towards the actuator  10 . The reaction surface  153  can be oriented away from the actuator  10 . The actuator facing surface  152  and reaction surface  153  can be substantially orthogonal to or orthogonal to the central axis A, the central axis A being substantially in line with or in line with the relative movement of the piston  70  and pump chamber  60 . In operation, when the user actuates the actuator  10 , some of the force applied by the user is transmitted to the block thermoplastic elastomeric spring  150  to be stored and then released to drive the actuator  10  through the upstroke and some is transferred to the piston  70  or pump chamber  60  to drive the manually operated pump  3  through a downstroke. Force may be applied over the entire actuator facing surface  152  or concentrated upon only a portion thereof. For three dimensional elastic bodies, a point load or a local load applied to a small part of a surface can result in greater deformation than the same load distributed over a larger part of the surface. That is because for a point load or local load, the deformation of the surface tends to be more three dimensional in nature as opposed to tending towards more one-dimensional deformation for same load distributed over a larger part of the surface. To drive the full range of rectilinear motion of the pump mechanism, the block thermoplastic elastomeric spring  150  must be deformed either locally or globally by a magnitude equal to the stroke length of the rectilinear motion. As such, locally loading or point loading of the block thermoplastic elastomeric spring  150  can be advantageous over a more widely distributed load because more displacement can occur with point or local loading as compared to a more widely distributed load. That can reduce the amount of force the user needs to generate to actuate the actuator  10  through a full downstroke to drive full movement of the piston  70  and pump chamber  60  relative to one another to move liquid or gel through the system. 
     Stress concentrators  154  can be provided to concentrate load transmitted from the actuator  10  to only a portion of the actuator facing surface  152 . Similarly, stress concentrators  154  can be positioned in contact with the reaction surface  153  to receive force transferred through the block thermoplastic elastomeric spring  150 . Only a portion of the actuator facing surface  152  may be engaged with the actuator through one or more stress concentrators  154 . Similarly, only a portion of the reaction surface  153  may be engaged with stress concentrators  154  that transfer force away from thermoplastic elastomeric spring  150 . The stress concentrators  154  can be between the actuator facing surface  152  and the piston  70 . Only a portion of the actuator facing surface  152  and or reaction surface  153  may be engaged with the actuator  10  through one or more stress concentrators  154 . The stress concentrators  154  can provide for local stressing of the actuator facing surface  152  and or reaction surface  153 . As described previously, for a given load, localized stressing of a three dimensional elastic body can result in more deformation of the body than more widely distributed applied stress. 
     The stress concentrators  154  can extend from the piston  70 . The stress concentrators  154  provide for a reduced area over which a force is applied to the actuator facing surface  152  and or reaction surface  153 . The stress concentrators  154  can be one or more fins  156 , cylindrical pins, conical pins, frustoconical pins, extending from the piston  70  or supporting the reaction surface  153  of the block thermoplastic elastomeric spring  150 , the stress concentrators  154  contacting only a portion of the actuator facing surface  152  and or reaction surface  153  of the block thermoplastic elastomeric spring  150 . The block thermoplastic elastomeric spring  150  can be positioned within the pump chamber  60 . The actuator facing surface  152  can be facing the stress concentrators  154  that extend from the piston  70 . The reaction surface  153  can be facing stress concentrators  154  that support the block elastomeric spring  150 , whether the block thermoplastic elastomeric spring  150  is outside of or within the pump chamber  60 . The stress concentrators  154  can contact less than about 50%, optionally less than about 25%, optionally less than about 20%, optionally less than about 15%, optionally less than about 10%, optionally less than about 5% of the area of the actuator facing surface  152  and or reaction surface  153 . Such fractions of contact area may be practical if the block thermoplastic elastomeric spring  150  is within the pump chamber  60  or external to the pump chamber  60 . The stress concentrators  154  can have a footprint  155  in contact with the actuator facing surface  152  and or reaction surface  153 . The smaller the fraction of contact area the greater the local deformation of the actuator facing surface  152  and or reaction surface  153  under a particular force applied to the actuator  10 . For a fixed number of stress concentrators  154 , the structural stability of stress concentrators  154  may increase with increased fraction of contact area since bulkier structures may be used. 
     A plurality of block thermoplastic elastomeric springs  150  may be stacked in series with one another. The block thermoplastic elastomeric springs  150  can have the same or different elastomeric properties and or geometry. The elastomeric properties and or geometry of individual block thermoplastic elastomeric springs  150  stacked in series can be selected to provide for the desired force response relationship. Individual block elastomeric springs  150  in the series can be separated from one another by stress concentrators  154  positioned between the block elastomeric springs  150 . The stress concentrators can  154  conduct force from one block thermoplastic elastomeric spring  150  to an adjacent block thermoplastic elastomeric spring  150 . The stress concentrator  154  function like the loading member discussed herein with respect to the compression spring. The stress concentrator  154  loads the block thermoplastic elastomeric spring  150  from one or both of the actuator facing surface  152  or reaction surface  153 , like the loading member loads the elastomeric tube. For example, the block elastomeric spring  150  shown in  FIGS. 3, 4, and 6  can be replaced by a plurality of block thermoplastic elastomeric springs  150 , for example as shown in  FIGS. 13A  and B. The plurality of block thermoplastic elastomeric springs  150  can be provided as a stack of block thermoplastic elastomeric springs in series with one another. Optionally, the each of the block thermoplastic elastomeric springs  150  in the series can be separated from one another by one or more stress concentrators  154  positioned between each of or just some of the block thermoplastic elastomeric springs  150  in the series. The stress concentrators  154  apply stress to the actuator facing surface  152  or actuator facing surfaces  152  and or the reaction surface  153  or reaction surfaces  153  over only a portion thereof. In operation, such a stack can provide for a greater magnitude of displacement under the same force as compared to a single block thermoplastic elastomeric spring  150  since the individual deformations of each of the block thermoplastic elastomeric springs  150  are additive to one another to provide for the cumulative deformation of the series of block thermoplastic elastomeric springs  150 . Furthermore, employing a series of block thermoplastic elastomeric springs  150  can be practical since the force-deformation curve may tend to be more linear for small forces and users are more familiar with pumps that have a linear force-response curve such as those that employ metal coil springs. 
     The series of block thermoplastic elastomeric springs  150  shown in  FIG. 13A  can be practical for pump dispensers  1  and trigger sprayers  2  in which the block thermoplastic elastomeric springs  150  are outside of the pump chamber  60 . For pump dispensers  1 , flow from the pump chamber  60  can be driven through the piston bore  120  that passes through the series of block thermoplastic elastomeric springs  150  for a pump dispenser  1 . Similarly, the series of block thermoplastic elastomeric springs  150  can be positioned outside the pump chamber  60  to drive the return stroke of the trigger  40 . The series of block thermoplastic elastomeric springs  150  shown in  FIG. 13B  can be practical for pump dispensers  1  and trigger sprayers  2  in which block thermoplastic elastomeric springs  150  are inside the pump chamber  60  since liquid can pass through openings in the series of block thermoplastic elastomeric springs  150  and stress concentrators  154 , the openings being continuous with one another. 
     The inlet one-way valve  50 , pump chamber  60 , piston  70 , actuator  10 , and block thermoplastic elastomeric spring  150 , optional outlet one-way valve  90 , outlet conduit  110 , and dispenser outlet  30  can each comprise or consist of the same material selected from the group consisting of or independently comprise or consist of a material selected from the group consisting of polyoxymethylene, polyethylene, polypropylene, polyethylene terephthalate, acrylonitrile butadiene styrene, and mixtures thereof. The materials selected to form the components of the manually operated pump  3  can be selected so that they can be conveniently separated from the block thermoplastic elastomeric spring  150  via a floatation process, with certain parts designed to sink and others designed to float. 
     The pump chamber  60 , piston  70 , stress concentrators  154 , and actuator  10  can each be formed from the same type of monomer. The pump chamber  60 , piston  70 , and actuator  10  can each consist of a single class of recyclable material as defined by the Society of the Plastic Industry as of the priority date of this application. The components of pump  3  can each consist of a single class of recyclable material as defined by the Society of the Plastic Industry as of the priority date of this application. 
     A variety of structures are contemplated for the block thermoplastic elastomeric springs  150 . The block thermoplastic elastomeric spring  150  can comprise one or more discontinuities. The block thermoplastic elastomeric spring  150  can be a hollow open ended cylinder  160 , as shown in  FIGS. 3 to 5 . If the block thermoplastic elastomeric spring  150  is within the pump chamber  60  a discontinuity  164  or discontinuities  164  can provide for volume within the block thermoplastic elastomeric spring  150  that can recharge and discharge liquid or gel that is to be dispensed. In the instance of a block thermoplastic elastomeric spring  150  that is a hollow open ended cylinder  160  and the block thermoplastic elastomeric spring  150  is within the pump chamber  60 , the hollow part can be the effective volume of the pump chamber  60  and material to be dispensed can pass through the open ends of the hollow open ended cylinder  160 . The effective volume of the pump chamber  60  is the volume within the pump chamber within which liquid or gel can be stored at any particular position of the piston  70  relative to the pump chamber  60 . That is, the hollow part, discontinuity  164 , or discontinuities  164  can provide for storage volume within the block thermoplastic elastomeric spring. That storage volume, which is a maximum when the actuator  10  is at the upstroke position, can be cyclically discharged and recharged as the block thermoplastic elastomeric spring  150  cycles through deformation cycles driven by relative movement of the piston  70  and pump chamber  60 . 
     There are a variety of structures that can be employed for the block thermoplastic elastomeric spring  150 . Nonlimiting examples of block thermoplastic elastomeric springs  150  are shown in  FIG. 4 . For example, the block thermoplastic elastomeric spring  150  can be a foam  162 . The foam  162  can be an open or closed cell elastomeric foam. Open celled elastomeric foam  162  provides for a greater storage volume within the block thermoplastic elastomeric spring  150 . Closed cell elastomeric foam  162  may improve the responsiveness of the manually operated pump  3  in terms of the link between movement of the actuator  10  and discharge of liquid or gel from dispenser outlet  30 . Closed cell foam  162  may be less viscoelastic than open celled foam  162 , since open cell foam  162  will recharge and discharge with cyclic deformation and the recharge and discharge rates are time dependent functions controlled by the permeability of the open cell foam  162  as a function of strain. 
     The block thermoplastic elastomeric spring  150  can be a hollow open ended cylinder  160  having a constituent material that is an open or closed cell foam  162 . The block thermoplastic elastomeric spring  150  may have a plurality of through holes as discontinuities  164 . Discontinuities  164  can provide storage volume and may be provided with a shape and density of number of holes per volume that renders the constituent material to have the desired elasticity and responsiveness over the range of induced strains. 
     The block thermoplastic elastomeric spring  150  can be monolithic. For example, the block thermoplastic elastomeric spring  150  can be a continuous material without discontinuous voids. A solid hollow cylinder  160  constituted by an elastomeric material is an example of a monolithic elastomeric spring  150 . 
     A hollow open ended cylinder  160  can be a desirable structure since the discontinuity  164  provides for low resistance pathway for flow of liquid or gel through the pump chamber  60 . Moreover, the viscoelastic effects associated with recharge and discharge from the within constituent material are reduced or minimized, particularly if the hollow cylinder  160  is monolithic or a closed cell foam  162 . 
     The block thermoplastic elastomeric spring  150  can be a hollow open ended cylinder  160  having a height from about 1 mm to about 60 mm, an outside diameter from about 3 mm to about 90 mm, optionally a height from about 2 mm to about 40 mm, and an outside diameter from about 5 mm to about 70 mm. The thermoplastic elastomeric material constituting the block thermoplastic elastomeric spring  150  can have a durometer greater than about 5 Shore A hardness or greater than about 10 Shore A hardness, or greater than about 20 Shore A hardness. 
     The thermoplastic elastomeric material constituting the block thermoplastic elastomeric spring  150  can have a durometer from about 5 Shore A hardness to about 60 Shore A hardness, optionally from about 10 Shore A hardness to about 50 Shore A hardness, optionally from about 20 Shore A hardness to about 35 Shore A hardness. Durometer is determined by ISO 7619-1. The pump chamber  60  can have an interior diameter of from about 3 mm to about 90 mm, optionally about 5 mm to about 70 mm, and height of from about 1 mm to about 60 mm, optionally from about 2 mm to about 40 mm. The stress concentrators  154  can contact from about 2% to about 20% of the actuator facing surface  152  and or reaction surface  153 . The fraction of the actuator facing surface  152  or reaction surface  153  contacted may can vary as a function of the number of stress concentrators  154  provided. Each of the stress concentrators  154  can be a parallelepiped having a footprint  155  in contact with the actuator facing surface  152  that is 1 mm to 10 mm by 1 mm to 35 mm and a height from about 1 mm to about 20 mm, optionally from about 1 mm to about 10 mm, orthogonal to the footprint  155 . The stress concentrators  154  can be positioned uniformly around the central axis A and extend radially away from the central axis A. The piston  70  can have the same diameter as the pump chamber interior diameter, within a tolerance such that the piston  70  and pump chamber  60  can move relative to one another. The intended down stroke length of the rectilinear motion of the piston  70  and pump chamber  60  relative to one another can be from about 2 mm to about 100 mm. Optionally, the block thermoplastic elastomeric spring  150  can be positioned outside the pump chamber  60 , with the proviso that a mechanism is provided for supporting the block thermoplastic elastomeric spring  150  during compression thereof and transferring kinetic energy from the block thermoplastic elastomeric spring  150  to the actuator  10  during relaxation of the block thermoplastic elastomeric spring  150 . A nonlimiting example of such an embodiment is shown in  FIG. 6 . Including the appurtenances to provide for an operating spring mechanism  80  outside the pump chamber  60 , may result in a taller pump dispenser  1 . A reaction body can be provided to resist movement of the block thermoplastic elastomeric spring  150  as the force from the actuator  10  is applied to the block thermoplastic elastomeric spring  150  and on the downstroke of the actuator  10 . And a transfer body can be mechanically engaged directly or indirectly with the actuator  10  to transfer stored kinetic energy from the block thermoplastic elastomeric spring  150  to the actuator  10 . The transfer body can be integral with or joined directly or indirectly to the actuator  10  which is in turn mechanically engaged with the piston  70 . 
     The aforementioned design for the basic elements of the manually operated pump  3  described above is similarly applicable to a trigger sprayer  2 . The difference between a pump dispenser  1  and trigger sprayer  2  is primarily in how the piston  70  is actuated. The actuator  10  of a pump dispenser  1  is typically actuated by the user pressing the actuator  10  with user&#39;s palm or fingers and bending her wrist or moving her forearm. A trigger sprayer  2  is typically actuated by hooking one or more of the users fingers around a trigger  40  and pulling one the finger or fingers back toward the user&#39;s palm. 
     A side view of part of a manually operated pump  3  that is part of a trigger sprayer  2  is shown in  FIG. 7 . The actuator  10  can be a trigger  40 . The trigger  40  can be rotatable about a hinge  170 . The trigger  40  can be mechanically engaged, directly or indirectly, with the piston  70  or pump chamber  60  to provide for movement of the piston  70  and pump chamber  60  relative to one another. A practical arrangement may be one in which the trigger  40  is engaged, directly or indirectly, with the piston  70  that is moveable within a stationary pump chamber  60 . 
     The block thermoplastic elastomeric spring  150  can be within the pump chamber  60 . In essence, this is similar to the construction of the manually operated pump  3  in a pump dispenser  1 , the difference being in how the manually operated pump  3  is reciprocatingly driven. 
     Movement of the piston  70  and pump chamber  60  relative to one another may be oriented in line with or generally in line with the movement of trigger  40 . Such trigger sprayers  2  may be referred to as having a horizontal pump chamber  60 , horizontal being orthogonal to the direction of the gravitation force when the trigger sprayer  2  is being used in an upright position with the dispenser outlet  30  higher than the pump chamber  60 . The pump chamber  60  may be horizontally mounted, by way of nonlimiting example as shown in  FIG. 8 , or generally horizontally mounted, meaning that the axis of rectilinear motion of the piston and or pump chamber is within about 15 degrees of the direction that the dispenser outlet  30  is oriented towards. 
     Optionally, movement of the piston  70  and pump chamber  60  relative to one another may be oriented perpendicular to or generally perpendicular to movement of the trigger  40 . For example, the piston  70  may articulate up and down within a vertically position pump chamber  60 , as in  FIG. 7 . Such arrangements may be referred to as having a vertical pump chamber  60 , vertical being inline to the direction of the gravitation force when the trigger sprayer  2  is being used in an upright position with the dispenser outlet  30  higher than the pump chamber  60 . 
     In operation, the block thermoplastic elastomeric spring  150  can be compressed by the user pulling the trigger  40  from the upstroke position to the downstroke position to move the piston  70  and pump chamber  60  relative to one another. The block thermoplastic elastomeric spring  150  is thereby loaded with potential energy. Unloading of block thermoplastic elastomeric spring  150  releases the potential energy as kinetic energy to move the trigger back to its upstroke position. As in the pump dispenser  1  described above, the downstroke can discharge the liquid or gel from the dispenser outlet  30  and the upstroke can reload liquid or gel into the pump chamber  60 . 
     The trigger  40  can be movable in line with piston  70 , by way of a nonlimiting example as shown in  FIG. 8 . A trigger  40  arranged as such can be a durable construction that is resistant to damage during assembly, shipping, unpacking, shelving, transporting, and use. 
     The dispenser outlet  30  of a trigger sprayer  2 , may include a structure to modify the flow from the conduit leading to the dispenser outlet  30  as the flow exits the dispenser outlet  30 . The dispenser outlet  30  can comprise a nozzle  180 . A nozzle  180  is a structure that constricts the flow of liquid or gel as compared to flow immediately upstream of the nozzle  180 . The nozzle  180  may optionally comprise a swirl chamber to impart angular momentum to the liquid or gel as it passes through the nozzle  180  so that liquid or gel is expelled from the dispenser outlet  30  in a spray cone. Optionally the dispenser outlet  30  may comprise a passively vented nozzle  180  that draws in air to foam the liquid or gel passing through the nozzle  180 . Other structures to develop the desired characteristics of the liquid or gel discharged from the dispenser outlet  30  can be included, such as a mesh screen to promote foaming of the discharge. 
     Structures that can be employed include a nozzle  180 , a vented nozzle  180 , a nozzle  180  combined with a swirl chamber, a screen, or other constriction or obstruction to create the desired characteristic of the material as it exits the dispenser outlet  30 . 
     Like described previously for the pump dispenser  1 , the block thermoplastic elastomeric spring  150  can be positioned outside of the pump chamber  60 . Such a design can be advantageous when chemical compatibility of the block thermoplastic elastomeric spring  150  and the liquid or gel to be dispensed is of concern. Further, assembly of the manually operated pump  3  may be convenient if the elastomeric spring  150  is outside of the pump chamber  60 . The storage volume of the pump chamber  60  may be increased if the elastomeric spring  150  is outside the pump chamber  60 . 
     A reaction body  166  can be provided to resist movement of the block thermoplastic elastomeric spring  150  as the force from the trigger  40  is applied to the block thermoplastic elastomeric spring  150  and on the downstroke of the trigger  40  ( FIG. 9 ). And a transfer body  168  can be mechanically engaged directly or indirectly with the piston  70  to transfer stored kinetic energy from the block thermoplastic elastomeric spring  150  to the piston  70  to move the piston  70  in an upstroke. The transfer body  168  can be integral with or joined directly or indirectly to the trigger  40  which is in turn mechanically engaged with the piston  70 . 
     The spring mechanism  80  in the manually operated pump  3  can comprise a compression spring  200  ( FIGS. 10A , B, and C). The compression spring  200  can operate on the principle that compressive force applied to the compression spring  200  can be mobilized by tension in the continuous thermoplastic elastomeric tube  210  housed within the interior to the compression spring  200 . The compression spring  200  can be engaged with the actuator  10 . The compression spring  200  can be outside the pump chamber  60 . In operation, the compression spring  200  functions by loading in one direction the continuous thermoplastic elastomeric tube  210  at two or more spaced apart locations and loading in an opposite direction the continuous elastomeric tube  210  at two or more other spaced apart locations offset from the aforesaid locations. Parts of the continuous thermoplastic elastomeric tube  210  between supports at which the loads are applied can be stretched and or parts of the thermoplastic elastomeric tube  210  at and near the supports can be deformed. The stretching of the elastomeric tube can be in directions out of plane of the elastomeric tube  210  rather than in the plane of the elastomeric tube  210 . For a circular elastomeric tube  210 , such as an o-ring, the stretching occurs in directions generally in line with the central axis A of the o-ring rather than as circumferential stretching. The deformation of the thermoplastic elastomeric tube  210  at and near the supports can be in the plane of the elastomeric tube  210 . 
     The compression spring  200  can comprise a continuous thermoplastic elastomeric tube  210  about a central axis A. The compression spring  200  can further comprise a first loading member  220  comprising two first tube supports  230  extending from a first base  240  and circumferentially spaced apart from one another about the central axis A. The first tube supports  230  support the continuous elastomeric  210  tube in a first direction  250  in line with the central axis A. The compression spring  200  further comprises a second loading member  260  comprising two second tube supports  270  extending from a second base  280  and circumferentially spaced apart from one another about the central axis A. The second tube supports  270  support the continuous thermoplastic elastomeric tube  210  in a second direction  290  in line with the central axis and opposite to the first direction  250 . The second direction  290  can be opposite the first direction  250 . The second tube supports  270  are circumferentially offset from the first tube supports  230 . The first base  240  and the second base  280  have a first position ( FIG. 10A ) in which the first base  240  and the second base  280  are spaced apart from one another along the central axis A by a first distance  300 . The first base  240  and the second base  280  have a second position ( FIG. 10B ) in which the first base  240  and the second base  280  are spaced apart from one another along the central axis by a second distance  310 . The second distance  310  can be less than the first distance  300 . The first distance  300  and the second distance  310  are scalar quantities (e.g. 3 mm). The first position and the second position can correspond to the upstroke position and the downstroke position, respectively, of the actuator  10  The continuous thermoplastic elastomeric tube  210  is a self-intersecting tube. Examples of a self-intersecting tube include annularly shaped tubes, a rubber band, an o-ring, a HULA HOOP, and a bicycle tire tube. The trace of the tube may be a circle, as in  FIGS. 10A  and B, oval, rectangle, square, an irregular shape, or other shape as desired. The trace of a tube is the shape of the tube that defines an enclosed area. The set of points defining the cross-section of the continuous thermoplastic elastomeric tube  210  at any portion around the trace of the tube can be a circle, as in  FIG. 10A , rectangle, square, polygon, or other closed shape. The cross-section can be solid or hollow. For example, for a typical o-ring, the trace is a circle and the set of points defining the cross-section at locations around the center of the o-ring is a circle as well. That is, the set of points that is a solid circle at all positions around a center at a distance that is the radius of the tube is the tube. The trace of a rubber band can be circular or non-circular, such as a shape have two opposing long edges and two rounded ends connecting the long edges. The thicker the cross section of the continuous elastomeric tube  210  about the central axis A, especially in a direction in line with the central axis A, the greater the tendency for the continuous elastomeric tube  210  to at least partially accommodate some, or even a majority, of the compression of the compression spring  200  by way of local elastic deformation of the continuous elastomeric tube  210  at or near the supports as opposed to stretching of the continuous elastomeric tube  210  between the supports being the dominate mechanism for accommodating compression of the compression spring  200 . The continuous elastomeric tube  210  can be an annulus having a rectangular cross section about the central axis A. The continuous elastomeric tube  210  can be an annulus having a rectangular cross section about the central axis, the cross section having a height measured in a direction parallel to the central axis A and a width orthogonal to the height and height to width ratio greater than 0.5, or greater than 0.8, or greater than 1. 
     The continuous thermoplastic elastomeric tube  210  can be a solid tube or hollow tube. A solid continuous thermoplastic elastomeric tube  210  can be an o-ring. A solid continuous thermoplastic elastomeric tube  210  may be more durable than a hollow one. The continuous thermoplastic elastomeric tube  210  can be a thermoplastic elastomer material. The continuous thermoplastic elastomeric tube  210  can comprise more than 50% thermoplastic elastomer material, by weight of the continuous thermoplastic elastomeric tube  210 . The continuous thermoplastic elastomeric tube  210  can comprise more than 90%, or even 100%, thermoplastic elastomer material, by weight of the continuous thermoplastic elastomeric tube  210 . The thermoplastic elastomer material can be non-crosslinked or crosslinked. The thermoplastic elastomer material can be selected from the group consisting of styrenic block copolymers (TPS), thermoplastic polyolefin elastomers (TPO), thermoplastic elastomer vulcanizates (TPV), thermoplastic polyurethane elastomers (TPU), thermoplastic copolyester elastomers (TPC), thermoplastic polyamide elastomers (TPA), non-classified thermoplastic elastomers (TPZ), and combinations thereof. The thermoplastic elastomer material can be selected from the group consisting of buna, butyl, EPDM, natural rubber, and combinations thereof. 
     The continuous thermoplastic elastomeric tube  210  can have a density greater than 1 g/cm 3  or less than 1 g/cm 3 . The thermoplastic material per se constituting the continuous thermoplastic elastomeric tube  210  can have a density greater than 1 g/cm 3  or less than 1 g/cm 3 . Density of the continuous thermoplastic elastomeric tube  210  and thermoplastic material per se can be increased to a desired level by including densifier materials. Density of the continuous thermoplastic elastomeric tube  210  and thermoplastic material per se can be decreased to a desired level by including lightweight fillers or using a foam structure. Moreover, the density of the continuous thermoplastic elastomeric tube  210  and thermoplastic material per se can be designed so that the part or material thereof floats or sinks in water to facilitate separation of the part or material in a float separation process used in a recycling process for mixed materials. 
     The continuous thermoplastic elastomeric tube  210  can be supported between the two opposing loading members. Each of the loading members can comprise two tube supports. The tube supports of one loading member are offset from the tube supports of the other loading member. In operation, movement of one loading member towards the other or both of the loading members towards one another forces the continuous thermoplastic elastomeric tube  210  to stretch between the adjacently opposing supports. The continuous thermoplastic elastomeric tube  210  is forced to deform as the adjacently opposing and offset supports intermesh with one another as they move towards and possibly even past one another. 
     The two first tube supports  230  support the continuous thermoplastic elastomeric tube  210  in a first direction  250  in line with the central axis A. The first tube supports  230  can be spaced apart, optionally circumferentially spaced apart, from one another. The first tube supports  230  can be on opposite sides of the central axis A so that a straight line between the first tube supports  230  passes through the central axis A. The second tube supports  270  can support the continuous thermoplastic elastomeric tube  210  in a second direction  290  in line with the central axis A. The second tube supports  270  can be spaced apart, optionally circumferentially spaced apart, from one another. And the second tube supports  270  can be on opposite sides of the central axis A so that a straight line between the second tube supports  270  passes through the central axis A. The effect of this structure is that the continuous thermoplastic elastomeric tube  210  can be stretched between opposing and offset pairs of a first tube support  230  and a second tube support  270 . The first tube supports  230  and the second tube supports  270  can have recesses  272  within which the continuous thermoplastic elastomeric tube is seated. The recesses  272  can restrain deformation of the continuous thermoplastic elastomeric tube  210  in a direction towards or away from the central axis A. 
     When the first base  240  and second base  280  are in the second position in which relative displacement of the first loading member  220  and second loading member  260  has occurred, strain is mobilized in the continuous thermoplastic elastomeric tube  210  beyond the strain that is mobilized in the continuous thermoplastic elastomeric tube  210  when the first base  240  and second base  280  are in the first position. When the first base  240  and second base  280  are in the second position, the continuous thermoplastic elastomeric tube  210  can be forcibly sagged between the second tube supports  270  and forcibly sagged between the first tube supports  230 . The sag referred to is not free sag, as occurs when a string is simply supported by two adjacent supports and sags under its own weight. Rather the forced sag, which is actually stretching, is a forced deformation of the continuous thermoplastic elastomeric tube  210  between two adjacent first tube supports  230  and between two adjacent second tube supports  230 , for example as in point load applied to a simply supported string between the simple supports, or even a distributed load over a discreet portion of a simply supported string. 
     The first base  240  and the second base  280  are the structures through which load that the compression spring  200  carries is transmitted from beyond the compression spring  200 , through the first loading member  220  and second loading member  260 , to the continuous thermoplastic elastomeric tube  210  via the first tube supports  230  and the second tube supports  270 . 
     In one arrangement, the first tube supports  230  are interleaved with the second tube supports  270  when the first base  240  and the second base  280  are in the second position. In that arrangement and in the second position, the continuous thermoplastic elastomeric tube  210  can have a zig-zag shape around the central axis A, the zig-zag being in directions generally parallel to the central axis A. As the continuous thermoplastic elastomeric tube  210  is strained on the downstroke of the manually operated pump  3 , the length of the continuous thermoplastic elastomeric tube  210  can increase, the increase in length being accommodated in directions generally along the central axis A, recognizing that direction is slightly diagonal since the first tube supports  230  and the second tube supports are offset from one another. The release of the stored energy from the strained continuous thermoplastic elastomeric tube  210  can drive the upstroke of the manually operated pump  3 . In operation, the continuous thermoplastic elastomeric tube  210  can have a first length when the first base  240  and second base  280  are in the first position, or upstroke position of the actuator  10 , and a second length when the first base  240  and the second position  280  are in the second position, or downstroke position of the actuator, the second length being greater than the first length. More simply stated, the continuous thermoplastic elastomeric tube  210  resists compression of the compression spring  200  by the thermoplastic elastomeric tube  210  stretching or being deformed within the compression spring  200 . The aforesaid structure of the compression spring  200  provides the space for the thermoplastic elastomeric tube  210  to mobilize tension or accommodate deformation forced thereupon by compression of the compression spring  200 . 
     Considering the first tube supports  230  as X supports and second tube supports  270  as Y supports, the arrangement shown in  FIGS. 10A , B, and C is X-Y-X-Y-X-Y-X-Y. Other interleaved relationships are contemplated, including X-Y-Y-X-Y-Y, in which the X&#39;s are interleaved with Y&#39;s immediately next to each X and there are two Y&#39;s next to one another without an X therebetween, X-Y-X-Y, and X-Y-X-Y-X-Y. The lengths of the continuous thermoplastic elastomeric tube  210  supported by each of the tube supports may differ from one another as may the heights of the tube supports in the direction parallel to the central axis A. The tube supports may also differ in their shape (e.g. width, aspect ratio) and or material of construction. The tube supports may be constructed of a single material or of more than one material. The tube supports may be constructed from the same material as the first and/or second base or may be constructed from a different material. Lengths of the continuous thermoplastic elastomeric tube  210  supported by each of the tube supports may be the same as one another, which may result in more uniform strain being applied to the continuous thermoplastic elastomeric tube  210  as compared an arrangement in which the lengths supported differ from one another. 
     In the X-Y-X-Y-X-Y-X-Y arrangement, the first loading member  220  comprises four first tube supports  230  extending from the first base  240  and spaced apart, optionally circumferentially spaced apart, optionally evenly circumferentially spaced apart, from one another about the central axis A and supporting the continuous thermoplastic elastomeric tube  210  in the first direction  250  in line with the central axis A. And the second loading member  260  comprises four second tube supports  270  extending from the second base  280  and spaced apart, optionally circumferentially spaced apart, optionally evenly circumferentially spaced apart, from one another about the central axis A and supporting the continuous thermoplastic elastomeric tube  210  in the second direction  290  in line with the central axis A and opposite to the first direction  250 . The second tube supports  270  are offset, optionally circumferentially offset, optionally evenly circumferentially offset, from the first tube supports  230 . 
     It may be practical to have some strain mobilized in the continuous thermoplastic elastomeric tube  210  when the first base  240  and the second base  280  are in the first position. This may improve the initial responsiveness of the compression spring  200  from its at-rest condition, as compared to a construction in which the continuous thermoplastic elastomeric tube  210  is at zero strain about the tube. That might be achieved by providing the first tube supports  230  slightly interleaved with the second tube supports  270  when the first base  240  and the second base  280  are in the first position. That is, only portions of, for example the tips of, the first tube supports  230  and second tube supports  270  are interleaved with one another. 
     As shown in  FIGS. 10A, 10B, and 10C , the first tube supports  230  can be circumferentially spaced apart, optionally evenly circumferentially spaced apart, from one another about the central axis A and the second tube supports  270  can be circumferentially spaced apart, optionally evenly circumferentially spaced apart, from one another about the central axis A offset from the first tube supports  230 . Interleaving can be facilitated by the second tube supports  270  being circumferentially offset from the first tube supports  230 . 
     The continuous thermoplastic elastomeric tube  210  can be a solid o-ring having a circular cross section about the central axis A. The o-ring can have a diameter from about 3 mm to about 65 mm and cross sectional area about the central axis A from about 0.1 mm 2  to about 10 mm 2 . The o-ring can comprise or consist of elastomeric class materials having a durometer from about Shore 00-20 to about Shore A-90. The first tube supports  230  can cumulatively support from about 2% to about 20%, optionally about 5% to about 15%, of the circumference of each continuous thermoplastic elastomeric tube  210 . The second tube supports  270  can cumulatively support from about 2% to about 20%, optionally about 5% to about 15%, of the circumference of each continuous thermoplastic elastomeric tube  210 . The first base  240  and second base  280  in the first position can be separated from one another by a first distance  300  from about 0.3 mm to about 50 mm, optionally from about 0.6 mm to about 30 mm. In the second position, the first base  240  and second base  280  can be separated from one another by a second distance  310  ( FIG. 10C ) from about 0.2 mm to about 40 mm, optionally from about 0.5 mm to about 20 mm. A compression spring  200  can have an operable range of intended motion from about 0.1 mm to about 15 mm, optionally from about 0.1 mm to about 10 mm. The compression spring  200  or one or more compression springs  200  combined in series can have an operable range of intended motion from about 0.1 mm to about 40 mm, optionally from about 0.2 mm to about 25 mm. The operable range of motion can be set to be the same as the stroke length of the rectilinear motion of the piston  70  relative to the pump chamber  60 . When a series of compression springs  200  are employed, the elastomeric tubes  210  can have the same characteristic dimensions and or comprise the same constituent material or the elastomeric tubes  210  can have characteristic dimensions that differ from one another and or comprise different constituent materials. 
     The first base  240  and the second base  280  can be disposed of within a guide  320  and at least one of the first base  240  and second base  280  can be moveable within the guide  320  in line with the central axis A. The guide  320  constrains movement of the first base  240  and second base  280  to be one dimensional. The guide can be a cylinder, which provides for simple manufacture and design of the component parts of the compression spring  200 . In a pump dispenser  1 , the guide  320  may be part of the housing  20 . Optionally, the guide  320  can be the pump chamber  60 , if the elements of the compression spring  200  are within the pump chamber  60 . The guide  320 , or whatever structure forms such guide, acts as the working cylinder of a shock absorber to restrain deformation of the shock absorber to one dimension. 
     A stem  242  can extend from the first base  240 . The stem  242  can be a rigid body, optionally a generally cylindrical rigid body, capable of transmitting load applied to the actuator  10  to the base  242 , which in turn transmits the load to the first tube supports  230 . The end of the stem  242  proximal the actuator  10  can be shaped so that a hinged trigger  40  can be used to move the stem  242 . For example the end of the stem  242  proximal the actuator  10  can be rounded to couple with a cup of the actuator. The stem  242  can optionally be joined to the actuator  10 . 
     The compression spring  200  and parts thereof, including the continuous thermoplastic elastomeric tube  210 , first loading member  220 , first tube support  230 , first base  240 , second loading member  260 , second tube support  270 , second base  280 , and guide  320 , and the pump chamber  60 , piston  70 , and actuator  10  can each comprise or consist of the same material selected from the group consisting of or independently comprise or consist of a material selected from the group consisting of polyoxymethylene, polyethylene polypropylene, polyethylene terephthalate, acrylonitrile butadiene styrene, buna, butyl, and mixtures thereof. The materials selected to form the components of the manually operated pump  3  and the compression spring  200  can be selected so that various components can be conveniently separated from one another via a floatation process, with certain parts designed to sink and others designed to float. A compression spring  200  as described herein can be practical in that the entirety of the compression spring  200  can be non-metallic which may simplify recycling. 
     The pump chamber  60 , piston  70 , first loading member  220 , first tube supports  230 , base  240 , second loading member  260 , second tube supports  270 , second base  280 , guide  320 , and actuator  10  can each be formed from the same type of monomer. The pump chamber  60 , piston  70 , first loading member  220 , first tube supports  230 , base  240 , second loading member  260 , second tube supports  270 , second base  280 , guide  320 , and actuator  10  can each consist of a single class of recyclable material as defined by the Society of the Plastic Industry as of the priority date of this application. The components of pump  3  can each consist of a single class of recyclable material as defined by the Society of the Plastic Industry as of the priority date of this application. 
     To provide for more displacement from the compression spring  200 , the continuous thermoplastic elastomeric tube, the first loading member  220 , the first base  240 , the second loading member  260 , and the second base  280  together form a spring element  202 , and the compression spring  200  can comprise a plurality of spring elements  202  arranged in series with one another along the central axis A, as shown in  FIG. 11 . As shown in  FIG. 11 , the second base  280  can be shared in common with an adjacent spring element  202  as a first base  240  of the second spring element  202 . That is, the second base  280  can be the first base  240  of the adjacent spring element  202 . This arrangement can provide for increasing the deformation range of the compression spring  200  without increasing the amount of strain that needs to be mobilized in an individual continuous thermoplastic elastomeric tube  210  or complicate the structural design of the tube supports. Large cyclic strains imposed upon the continuous thermoplastic elastomeric tube  210  may result in undesirable fatigue of the material. 
     The compression spring  200  can be positioned within or outside of the pump chamber  60 . For example, the compression spring  200  or a series of compression springs  200  may replace the block thermoplastic elastomeric spring  150  shown in  FIGS. 3 to 6 . 
     A pump dispenser  1  that comprise a pair of compression springs  200  outside the pump chamber  60  is shown in  FIG. 12 . Such an arrangement can be practical to reduce the potential for chemical incompatibility of the parts of the compression spring  200  and the liquid or gel being pumped. 
     Combinations 
     An example is below:
     A. A manually operated pump ( 3 ) comprising:
       an inlet one-way valve ( 50 );   a pump chamber ( 60 ) downstream of and in fluid communication with said inlet one-way valve;   a piston ( 70 ) interior to said pump chamber and slideably engaged with said pump chamber;   an actuator ( 10 ) engaged with said piston or said pump chamber; and   a block thermoplastic elastomeric spring ( 150 ) engaged with said actuator to move said actuator as said block thermoplastic elastomeric spring relaxes.   
       B. The pump according to Paragraph A, wherein said block thermoplastic elastomeric spring has an actuator facing surface ( 152 ) oriented towards said actuator, wherein only a portion of said actuator facing surface is engaged with said actuator through one or more stress concentrators ( 154 ).   C. The pump according to Paragraph B, wherein said stress concentrators are between said actuator facing surface and said piston.   D. The pump according to Paragraphs A to C, wherein said block thermoplastic elastomeric spring has an actuator facing surface ( 152 ) oriented towards said actuator and an opposing reaction surface ( 153 ), wherein only a portion of said reaction surface is engaged with one or more stress concentrators ( 154 ).   E. The pump according to any of Paragraphs A to D, wherein said actuator is engaged with said piston.   F. The pump according to any of Paragraphs A to E, wherein said block thermoplastic elastomeric spring is within said pump chamber.   G. The pump according to any of Paragraphs A to E, wherein said block thermoplastic elastomeric spring is outside said pump chamber.   H. The pump according to any of Paragraphs A to G, wherein said block thermoplastic elastomeric spring has a plurality of discontinuities ( 164 ).   I. The pump according to any of Paragraphs A to H, wherein said block thermoplastic elastomeric spring is an open or closed cell elastomeric foam ( 162 ).   J. The pump according to any of Paragraphs A to H, wherein said block thermoplastic elastomeric spring is monolithic.   K. The pump according to any of Paragraphs A to J, wherein said block thermoplastic elastomeric spring is a hollow open ended cylinder ( 160 ).   L. The pump according to any of Paragraphs A to K, wherein said actuator includes a trigger ( 40 ) rotatable about a hinge ( 170 ).   M. The pump according to any of Paragraphs A to K, wherein said actuator is a trigger ( 40 ) movable in line with said piston.   N. The pump according to any of Paragraphs A to M, wherein said pump further comprises an outlet one-way valve ( 90 ) downstream of and in fluid communication with said pump chamber,   O. The pump according to Paragraph N, wherein said pump comprises an outlet conduit ( 110 ) downstream of said outlet one-way valve and a dispenser outlet ( 30 ) downstream of said outlet conduit, wherein said dispenser outlet comprises a nozzle ( 180 ).   P. The pump according to Paragraph N or O, wherein said pump comprises an outlet conduit ( 110 ) downstream of said outlet one-way valve and a dispenser outlet ( 30 ) downstream of said outlet conduit, wherein said actuator, said outlet conduit, and said outlet one-way valve together are rectilinearly moveable to drive said piston.   Q. The pump according to any of Paragraphs A to O, wherein said actuator and said outlet conduit together are rectilinearly moveable to drive said piston.   R. The pump according to any of Paragraphs A to Q, wherein said pump chamber, said piston, and said actuator are each formed from the same type of monomer.   S. The pump according to any of Paragraphs A to R, wherein said pump chamber, said piston, and said actuator are each formed from the same type of polymer.   T. The pump according to any of Paragraphs A to S, wherein said block thermoplastic elastomeric spring comprises a thermoplastic elastomer material selected from the group consisting of styrenic block copolymers (TPS), thermoplastic polyolefin elastomers (TPO), thermoplastic elastomer vulcanizates (TPV), thermoplastic polyurethane elastomers (TPU), thermoplastic copolyester elastomers (TPC), thermoplastic polyamide elastomers (TPA), non-classified thermoplastic elastomers (TPZ), and combinations thereof.   U. The pump according to any of Paragraphs A to S, wherein said pump comprises a plurality of said block thermoplastic elastomeric springs stacked in series with one another.   V. The pump according to any of Paragraphs A to U, wherein said block thermoplastic elastomeric spring has a density less than that of constituent materials of said pump chamber, piston, and said actuator.   W. The pump according to any of Paragraphs A to U, wherein said block thermoplastic elastomeric spring has a density greater than that of constituent materials of said pump chamber, piston, and said actuator   

     The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as “40 mm” is intended to mean “about 40 mm.” 
     Every document cited herein, including any cross referenced or related patent or application and any patent application or patent to which this application claims priority or benefit thereof, is hereby incorporated herein by reference in its entirety unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to any invention disclosed or claimed herein or that it alone, or in any combination with any other reference or references, teaches, suggests or discloses any such invention. Further, to the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern. 
     While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.