Atomizing pump

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber;
• a primary piston means slidable in said pump chamber for defining a discharge passage out of said pump chamber and for forcing liquid out of said pump chamber via said discharge passage;
• a movable sealing conduit for slidably and sealingly engaging said supply conduit;
• a poppet having
• (1) a primary valve means for being moved against said primary piston means to occlude said discharge passage,
• (2) a piston surface for being pressurized to move said poppet away from said primary piston means so as to space said primary valve means away from said discharge passage to permit flow therethrough, and
• (3) a secondary valve means for being moved against said sealing conduit and occluding flow therethrough from said pump chamber;
• biasing means for biasing said poppet against said primary piston means to seal said discharge passage with said primary valve means;
• and
• lost motion means for defining a lost motion arrangement between said poppet and said sealing conduit to permit a limited degree of relative movement between said poppet and sealing conduit between first and second extremes of said relative movement, said lost motion means including a portion of said biasing means being located to simultaneously engage said poppet and said sealing conduit at said first extreme of said relative movement whereby, at said first extreme of said relative movement, flow through said sealing conduit is permitted by said secondary valve means, and at said second extreme of said relative movement, flow through said sealing conduit is prevented by said secondary valve means.

A finger-operated pump for conveying liquid from a suction tube extending into a container holding liquid, said pump comprising:

• supply conduit means for defining a liquid flow passage, said supply conduit means having a lower inlet end opening for communicating with the top end of said suction tube and having an upper end outlet opening from which said liquid is discharged;
• pump chamber means for defining a pressurizable chamber around said supply conduit means upper end outlet opening to receive said discharging liquid;
• primary piston means sealingly and slidably disposed in said pump chamber means and reciprocable therein for pressurizing said liquid in said pump chamber means when said primary piston is moved toward said supply conduit means;
• discharge passage means for defining a liquid discharge passage through said primary piston means and out of said pump chamber means;
• movable sealing conduit means for being sealingly and slidably engaged with said supply conduit means during at least a portion of the movement of said primary piston means toward said supply conduit means and for defining an upper end opening from which said liquid is discharged;
• a poppet comprising
• (1) a primary valve means for moving with said poppet between
• (a) a closed position against said primary piston means to occlude flow through said discharge passage means in said primary piston means, and
• (b) an open position spaced from said primary piston means to permit flow through said discharge passage means in said primary piston means;
• and
• (2) secondary valve means movable with said primary valve means for engaging said sealing conduit means upper end to prevent back flow through said sealing conduit means upper end opening when said pump chamber means is being increasingly pressurized;
• biasing means for biasing said poppet to locate said primary valve means at said closed position against said primary piston means;
• and
• lost motion means for defining a lost motion arrangement between said secondary valve means and said movable sealing conduit means to permit a limited degree of relative movement of said secondary valve means and said sealing conduit means between
• (1) a full open first position permitting flow through said sealing conduit means upper end opening, and
• (2) a full closed second position occluding back flow through said sealing conduit means upper end opening,
• said lost motion means including a portion of said biasing means being located to simultaneously engage a portion of said secondary valve means and said sealing conduit when said secondary valve means and sealing conduit are at said full open position.

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber;
• a movable sealing conduit for movement between a raised, unactuated position and a range of lowered, actuated positions in which said sealing conduit slidably and sealingly engages said supply conduit in a telescoping relationship;
• a primary piston operably disposed in said chamber for movement between a raised, unactuated rest position and a range of lowered, actuated positions, said primary piston defining a discharge passage out of said pump chamber;
• a poppet having a primary valve means for occluding flow through said discharge passage and having a secondary valve means for occluding flow through said sealing conduit;
• biasing means for biasing said poppet primary valve means against said primary piston to urge said primary piston toward its said raised, unactuated, rest position;
• and
• means for permitting a limited degree of relative movement between said poppet and sealing conduit, said means including a portion of said biasing means being located to engage both said poppet and said sealing conduit after actuation of said pump to return said sealing conduit to its said raised, unactuated rest position and maintain said poppet primary valve means biased against said primary piston in its said raised, unactuated position.

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber;
• a movable sealing conduit for slidably and sealingly engaging said supply conduit in a telescoping relationship;
• a primary piston operably disposed in said chamber and defining a discharge passage out of said pump chamber;
• a poppet having a primary valve means for occluding flow through said discharge passage and having a secondary valve means for occluding flow through said sealing conduit;
• and
• lost motion means for permitting a limited degree of relative movement between said poppet and sealing conduit between first and second extremes of said relative movement, said lost motion means including spring means for (1) biasing said poppet primary valve means against said primary piston and (2) engaging said poppet and sealing conduit at least when said poppet and sealing conduit are at said first extreme, said spring means including only one spring operatively disposed to engage said poppet and not said sealing conduit when said poppet and sealing conduit are at said second extreme.

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber;
• a movable sealing conduit for slidably and sealingly engaging said supply conduit in a telescoping relationship;
• a primary piston operably disposed in said chamber and defining a discharge passage out of said pump chamber;
• a poppet having a primary valve means for occluding flow through said discharge passage and having a secondary valve means for occluding flow through said sealing conduit;
• and
• lost motion means for permitting a limited degree of relative movement between said poppet and sealing conduit between first and second extremes of said relative movement, said lost motion means including spring means for (1) biasing said poppet primary valve means against said primary piston and (2) engaging said poppet and sealing conduit at least when said poppet and sealing conduit are at said first extreme, said poppet including
• (1) an upper portion defining said primary valve means,
• (2) a lower portion defining said secondary valve means, and
• (3) an upwardly facing piston surface for being pressurized by said liquid in said pump chamber so as to move said primary valve means in opposition to the force of said spring means to open said discharge passage.

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber;
• a movable sealing conduit for slidably and sealingly engaging said supply conduit in a telescoping relationship;
• a primary piston operably disposed in said chamber and defining a discharge passage out of said pump chamber;
• a poppet having a primary valve means for occluding flow through said discharge passage and having a secondary valve means for occluding flow through said sealing conduit;
• and
• lost motion means for permitting a limited degree of relative movement between said poppet and sealing conduit between first and second extremes of said relative movement, said lost motion means including spring means for (1) biasing said poppet primary valve means against said primary piston and (2) engaging said poppet and sealing conduit at least when said poppet and sealing conduit are at said first extreme, said spring means including a compression spring having a lower end maintained at a fixed elevation relative to said pump chamber and a movable upper end at least partly engaged with said poppet, said spring upper end including at least a portion extending radially beyond at least a portion of said poppet to engage said sealing conduit when said sealing conduit and poppet are at said first extreme of said relative movement.

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber;
• a movable sealing conduit for slidably and sealingly engaging said supply conduit in a telescoping relationship, said sealing conduit having an upper end defining a generally smooth circular opening;
• a primary piston operably disposed in said chamber and defining a discharge passage out of said pump chamber;
• a poppet having a primary valve means for occluding flow through said discharge passage and having a secondary valve means for occluding flow through said sealing conduit, said poppet having a downwardly projecting pin disposed in said sealing conduit opening, said poppet further having a plurality of circumferentially spaced-apart ribs extending radially outwardly and defining a plurality of grooves for accommodating fluid flow past said poppet pin;
• and
• lost motion means for permitting a limited degree of relative movement between said poppet and sealing conduit between first and second extremes of said relative movement, said lost motion means including spring means for (1) biasing said poppet primary valve means against said primary piston and (2) engaging said poppet and sealing conduit at least when said poppet and sealing conduit are at said first extreme.

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber, said supply conduit including a fixed cylindrical tube that projects upwardly inside said pump chamber and that terminates in an open upper end;
• a movable sealing conduit for slidably and sealingly engaging said supply conduit in a telescoping relationship, said movable sealing conduit including a generally cylindrical hollow wall adapted to engage the exterior of said supply conduit cylindrical tube, said sealing conduit hollow wall including an inwardly projecting annular seal for engaging the exterior of said supply conduit cylindrical tube;
• a primary piston operably disposed in said chamber and defining a discharge passage out of said pump chamber;
• a poppet having a primary valve means for occluding flow through said discharge passage and having a secondary valve means for occluding flow through said sealing conduit;
• and
• lost motion means for permitting a limited degree of relative movement between said poppet and sealing conduit between first and second extremes of said relative movement, said lost motion means including spring means for (1) biasing said poppet primary valve means against said primary piston and (2) engaging said poppet and sealing conduit at least when said poppet and sealing conduit are at said first extreme.

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber, said supply conduit including a fixed cylindrical tube that projects upwardly inside said pump chamber and that terminates in an open upper end;
• a movable sealing conduit for slidably and sealingly engaging said supply conduit in a telescoping relationship, said movable sealing conduit including a generally cylindrical hollow wall;
• a primary piston operably disposed in said chamber and defining a discharge passage out of said pump chamber;
• a poppet having a primary valve means for occluding flow through said discharge passage and having a secondary valve means for occluding flow through said sealing conduit;
• and
• lost motion means for permitting a limited degree of relative movement between said poppet and sealing conduit between first and second extremes of said relative movement, said lost motion means including spring means for (1) biasing said poppet primary valve means against said primary piston and (2) engaging said poppet and sealing conduit at least when said poppet and sealing conduit are at said first extreme, said sealing conduit having an upper cross wall defining therein an aperture through which liquid can flow for refilling said pump chamber as said primary piston and poppet move upwardly in said pump chamber.

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber, said supply conduit including a fixed cylindrical tube that projects upwardly inside said pump chamber and that terminates in an open upper end;
• a movable sealing conduit for slidably and sealingly engaging said supply conduit in a telescoping relationship, said movable sealing conduit including a generally cylindrical hollow wall having outwardly projecting, circumferentially spaced-apart guide ribs for slidably contacting the inside of said pump chamber and maintaining axial alignment of said sealing conduit;
• a primary piston operably disposed in said chamber and defining a discharge passage out of said pump chamber;
• a poppet having a primary valve means for occluding flow through said discharge passage and having a secondary valve means for occluding flow through said sealing conduit;
• and
• lost motion means for permitting a limited degree of relative movement between said poppet and sealing conduit between first and second extremes of said relative movement, said lost motion means including spring means for (1) biasing said poppet primary valve means against said primary piston and (2) engaging said poppet and sealing conduit at least when said poppet and sealing conduit are at said first extreme.

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber;
• a movable sealing conduit for slidably and sealingly engaging said supply conduit in a telescoping relationship;
• a primary piston operably disposed in said chamber and defining a discharge passage out of said pump chamber;
• a poppet having a primary valve means for occluding flow through said discharge passage and having a secondary valve means for occluding flow through said sealing conduit;
• biasing means for biasing said poppet primary valve means against said primary piston;
• and
• lost motion means for permitting a limited degree of relative movement between said poppet and sealing conduit between first and second extremes of said relative movement, said lost motion means including a portion of said biasing means being located to engage said poppet and said sealing conduit at said first extreme of said relative movement, said biasing means being operatively disposed to engage said poppet and not said sealing conduit when said poppet and sealing conduit are at said second extreme.

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber;
• a movable sealing conduit for slidably and sealingly engaging said supply conduit in a telescoping relationship;
• a primary piston operably disposed in said chamber and defining a discharge passage out of said pump chamber;
• a poppet having a primary valve means for occluding flow through said discharge passage and having a secondary valve means for occluding flow through said sealing conduit;
• biasing means for biasing said poppet primary valve means against said primary piston;
• and
• lost motion means for permitting a limited degree of relative movement between said poppet and sealing conduit between first and second extremes of said relative movement, said lost motion means including a portion of said biasing means being located to engage said poppet and said sealing conduit at said first extreme of said relative movement, said poppet including
• (1) an upper portion defining said primary valve means,
• (2) a lower portion defining said secondary valve means, and
• (3) an upwardly facing piston surface for being pressurized by said liquid in said pump chamber so as to move said primary valve means in opposition to the force of said biasing means to open said discharge passage.

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber;
• a movable sealing conduit for slidably and sealingly engaging said supply conduit in a telescoping relationship;
• a primary piston operably disposed in said chamber and defining a discharge passage out of said pump chamber;
• a poppet having a primary valve means for occluding flow through said discharge passage and having a secondary valve means for occluding flow through said sealing conduit;
• biasing means for biasing said poppet primary valve means against said primary piston, said biasing means including a compression spring having a lower end maintained at a fixed elevation relative to said pump chamber and a movable upper end at least partly engaged with said poppet;
• and
• lost motion means for permitting a limited degree of relative movement between said poppet and sealing conduit between first and second extremes of said relative movement, said lost motion means including a portion of said biasing means being located to engage said poppet and said sealing conduit at said first extreme of said relative movement, said lost motion means including at least a portion of said compression spring upper end extending radially beyond at least a portion of said poppet to engage said sealing conduit when said sealing conduit and poppet are at said first extreme of said relative movement and to be disengaged from said sealing conduit when said sealing conduit and poppet are at said second extreme of said relative movement.

A finger-operated pump comprising:

• a pump chamber;
• a supply conduit communicating with said pump chamber;
• a movable sealing conduit for slidably and sealingly engaging said supply conduit in a telescoping relationship, said sealing conduit having an upper end defining a generally smooth circular opening;
• a primary piston operably disposed in said chamber and defining a discharge passage out of said pump chamber;
• a poppet having a primary valve means for occluding flow through said discharge passage and having a secondary valve means for occluding flow through said sealing conduit, said poppet having a downwardly projecting pin disposed in said sealing conduit opening, said poppet further having a plurality of circumferentially spaced-apart ribs extending radially outwardly and defining a plurality of grooves for accommodating fluid flow past said poppet pin;
• biasing means for biasing said poppet primary valve means against said primary piston;
• and
• lost motion means for permitting a limited degree of relative movement between said poppet and sealing conduit between first and second extremes of said relative movement, said lost motion means including a portion of said biasing means being located to engage said poppet and said sealing conduit at said first extreme of said relative movement.