CA2015860A1 - Double acing pump - Google Patents
Double acing pumpInfo
- Publication number
- CA2015860A1 CA2015860A1 CA002015860A CA2015860A CA2015860A1 CA 2015860 A1 CA2015860 A1 CA 2015860A1 CA 002015860 A CA002015860 A CA 002015860A CA 2015860 A CA2015860 A CA 2015860A CA 2015860 A1 CA2015860 A1 CA 2015860A1
- Authority
- CA
- Canada
- Prior art keywords
- piston
- pump chamber
- product
- supplemental
- port means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1088—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle the pump being a double-acting pump
Abstract
ABSTRACT OF THE DISCLOSURE
A double acting trigger pump on a container includes a cylinder and a piston reciprocal therein that cooperate in providing a primary pump chamber.
An inlet valve regulates product being drawn into the primary pump chamber. A double piston seal is at the inner end of the piston and includes an outlet valve coaxial with a longitudinal bore in the piston. A
supplemental pump chamber that also communicates with the bore is defined between outer surfaces of the piston and inner surfaces of the cylinder as well as the double piston seal and a rearward retaining ring.
During the pressure stroke of the piston, product is dispensed from the primary pump chamber out from the pump and fills the supplemental pump chamber. During the suction stroke of the piston, product is drawn into the primary pump chamber from the container and product is discharged from the supplemental pump chamber out from the pump.
A double acting trigger pump on a container includes a cylinder and a piston reciprocal therein that cooperate in providing a primary pump chamber.
An inlet valve regulates product being drawn into the primary pump chamber. A double piston seal is at the inner end of the piston and includes an outlet valve coaxial with a longitudinal bore in the piston. A
supplemental pump chamber that also communicates with the bore is defined between outer surfaces of the piston and inner surfaces of the cylinder as well as the double piston seal and a rearward retaining ring.
During the pressure stroke of the piston, product is dispensed from the primary pump chamber out from the pump and fills the supplemental pump chamber. During the suction stroke of the piston, product is drawn into the primary pump chamber from the container and product is discharged from the supplemental pump chamber out from the pump.
Description
~QY 01 ~g~ 14:44 KRNE/D~LsI~ER&ET P.Z/19 .
DOUBLE ACTING PUMP
=5~ .
A need for improved trigger sprayers and particularly double acting trigger sprayers has been clearl.y established in the packaging industry.
However, the object has always been to develop a trigger sprayer that is cost e~fec~ive and possesses a more forceful ~pray and greater output per stroXe which could be readily adjusted. Of course such triggér pu~pg should pre~erably not be restrictedito particu~ar products to be dispensed and should posse~s the abil ity to dispense petroleum based products.
Pumps of this varlety because of con~umer preference, must possess eye appeal to be commercially feasi~le.
_UMMARY Og $~E INVENTTON
A principal object of the present invention is to provide a cost e~Sective, reliable, double ac~ing trigger actuated piston pump with the foregoing characteristics that permits a full stroke wit~
relatively more le~erage but with comfort ~or high volume delivery during both the pressure and suction stroXes at relatively high pres~ure without concern over product compatibility while being a shipper which lends to its commercial acceptability.
~R~EF DESCRSPT~ON OY THE: DEU~ NG8 Figure 1 is a side elevational vie~ of the double acting trigger actuated pump of this invention at the start of the press~re stroke with certain parts ~roken and removed and sectioned;
Figure 2 is a similar view during the pres~ure stroke with the bottle head space cable of being 11RY 01 '91~ 14:44 KRNE/DRLSI~1ER&ET P.3/19 , ': ' :.. ~ . ' .
DOUBLE ACTING PUMP
=5~ .
A need for improved trigger sprayers and particularly double acting trigger sprayers has been clearl.y established in the packaging industry.
However, the object has always been to develop a trigger sprayer that is cost e~fec~ive and possesses a more forceful ~pray and greater output per stroXe which could be readily adjusted. Of course such triggér pu~pg should pre~erably not be restrictedito particu~ar products to be dispensed and should posse~s the abil ity to dispense petroleum based products.
Pumps of this varlety because of con~umer preference, must possess eye appeal to be commercially feasi~le.
_UMMARY Og $~E INVENTTON
A principal object of the present invention is to provide a cost e~Sective, reliable, double ac~ing trigger actuated piston pump with the foregoing characteristics that permits a full stroke wit~
relatively more le~erage but with comfort ~or high volume delivery during both the pressure and suction stroXes at relatively high pres~ure without concern over product compatibility while being a shipper which lends to its commercial acceptability.
~R~EF DESCRSPT~ON OY THE: DEU~ NG8 Figure 1 is a side elevational vie~ of the double acting trigger actuated pump of this invention at the start of the press~re stroke with certain parts ~roken and removed and sectioned;
Figure 2 is a similar view during the pres~ure stroke with the bottle head space cable of being 11RY 01 '91~ 14:44 KRNE/DRLSI~1ER&ET P.3/19 , ': ' :.. ~ . ' .
2~8~0 2 ;
~ented with product being dispensed ~rom the pump chamber;
- Figure 3 is a sim~lar view during the suction stroke with the product drawn into the primary pump chamber with the product being dispensed from the supplemental pump chamber, DBTA~L~D DE8CR~PTIO~
In the drawin~s a double acting trigge~ actuated pump lO is shown associa~ed with the tbreaded neck 12 of container or bottle 14 containing the product to be di~pensed. Towards this end an internally threaded cap 16 extends across the opening of the neck 12 and threadedly mates therewith in securing the pump lO on bottle 14. The cap 16 secures the pump base 18 and seals it across the opening of the neck 12 by engaging ~;
the circumferentially extending lip 20. ~ase ~8 includes a downwardly depending boss 22 which supports dip tube 24, which communicates with passage 26 for product ~low. The base is also provided with vent opening 28 cooperating in venting the head space of the bottle 14.
~ he pump lO is provided with an ou~er shell 30 and a concentric inner shell 32 both suppor~ed on base 18 ;
and both having a closed inner end 30a and 32a respectful}y. ~he outer shell 30 and inner shell 3~
define a product chaFber 34 which communic~tes with passage 26 for reception o~ product to be dispensed.
The vent opening 28 extends through the inner shell 32 ~or eventual communication with the atmosphere as will be described shortly. The inner end 32a of inner shell 32 i~ provided with a valve seat 36 which receives a ~all check valve 38 for closing of2 pump chamber 40 ~ithin inner shell 32 and isolat1ng it from the product chamber 34 during the pressure stroke.
.~ ' MhY 01 '90 14: 44 K~INE/D~LSIMER&ET P. 4/19 2(~5~60 ~he valve 38 will open to permit product to enter the primary pump c~. mber 40 ~rom the product chamber 34 during the section stroke. ~he outer open ends of the outer shell 30 and inner shell 32 are provided with a retaining ring 41 which retains a spaced concentrical relationship of the shell parts and at the same time cooperates in maintaining the coaxial relationship of ~he piston 42. Mo~e importantly, this retaining ring 41 cooperates with the piston 42 and providing a supplemental pump chamber which contributes to the double action of the pump 10. The piston 42 includes an inner double pis~on seal 44 having a pair of seal~ng lip~ 46 and 48 which form slidlng seals with the interior of the inner shell 32. ~he piston 42 is also provided with a coaxial bore 50 in the piston rod 52. The piston rod i5 pro~ided with a sealing lip 53 which engages with the retaining ring 41 in sealing the vent opening 28 when the pump is in it~ shipping condi~ion as depicted in Figure 1. A piston return spring 49 is biased against the double piston seal 44 ~ ;
and the inner shell wall 32a. It is also contemplated that this spring could be readily externally mounted.
The outer end 54 of the piston rod 52 mounts a discharge no2zle 56 which may be of any suitable des~gn to gene~ate the desired discharge patterns.
The double piston ~eal 44 is provided with a valve seat 58 coaxlal with the bore 50 in the piston rod and cooperates with a ball check valve 60. The valve 60 assumes a closed position during the suction stro~e and unseats during ~he pressure stroke.
In order to activate the piston 42, d trigger mechanism 62 is employed. ~he trigger mechanism 62 ;~
includes a trigger 64 suitab~y pivoted at 65 to the trigger cupport 66 which may be inte~ral with ~he , '~ .':
~ Y 01 '90 14:45 K~lNE/DQLSI~1~R&ET-- p 5/19 . .
'' 2~LS86~
. 4 outer shell 30. ~he trigger 64 is provided with an actuator surfacc ~8 designed to engage piston actuated plate 70 extending la~erally from piston rod 52. The zone of engagement or the trigger surface 68 ànd the plate 70 is of a sliding nature to provide as near as possible, a direction of force parallel to the axis of the piston rod 52 as the trigger 64 is pulled and the piston 42 is moved axially from its retracted position to its forward position during the pressure stroke.
In order to obtain dispensing or discharg~ of product during the suc~ion stroke, a s~pplemental pump chamber 74 is defined between exterior surfaces o~ the piston rod 52 and internal surfaces of the inner shell 32 and the in~ernal sealing lip 16 of th~ retaining ring 41. Access to the supplemen~al pump chamber 74 is obtained through lateral passages 78 at the ~orward end of the piston rod 52 and a clearance 80 between ~orward circu~ferentlally extending surfaces of the piston rod 52 and internal surfaces of the inne~ shell 32.
In operation of ~he pump lO, i~ will be assumed that initially, ~he pump will be ~ully p~imed with product to be dispensed in the primary pump cham~er and the pi5~0n 42 is ln its fully retracted position as shown in figure l. In this po~i~ion, which is also the end of the suction stroke or start of the pressure stroke, the ball 38 will be sealed against seat 36, the vent ~8 will be closed to the atmosphere. In order to dispen~e product, the trigger 64 will be pulled and the sliding engagemen~ of the actuation surface 68 against the plate 70 will force the piston rod ~2, and, consequently, the double piston seal 44 ~orwardly as shown in Figure 2. $his movement will initiate the pressure stroke with the rl~Y 01 ' 90 14: 45 Kf~NI~/DRLSI~1ER&ET P . 6/19 21~58~
product being forced out of the chamber 40, bypassing unseated ball v_lve 60, through bore 50 out through the nozzle S6 and into the desired discharged pattern onto ~he selected surface. In addition product will flow through the lateral passages 78 through clearance 80 into the supplemental pump chamber 74. As the t~igger 64 ls pul.led further causing the double piston seal 44 to bottom in the pump chamber 40 if this be the desired or selected stroke of the piston. It will be noted that during this move~ent, the vent passage 28 will be opened to vent the container headspace to atmosphere to replace product dispensed with air.
At the start of the suction stroke, the trigger mechanism 62 is released, and the spring 49 biased against inner shell wall 32a and double piston seal 44, will urge the pi~ton 42 to its retracted position as shown schematically in Figure 3. ~he valve 60 will close against its seal 58 and inlet valve 38 will ,, open. The product in the container 14 will be ~orced . ;~
up dip tube 2~ into passage 26 and chamber 34 passed the valve 38 into primary pump chamber 40. During the retraction of the piston 42, product in the supplemental pump chamber 74 will be forced through the clearance 80 into lateral passages 18 through bore ~ . :
~o and out through the nozzle 56. Eventually, the .
piston 42 will app~oach its fully retracted position at which the desired amount of product will be pulled .. ~ :.
into primary pump chamber 40 and the product ~in .;-~ :
supplemental pump chamber 74 vill be discharged. This ..
a fully retracted position is represented by Figure 1 .;
with both val~es 38 and 60 seated and closed and vent 28 closed. The pump 10 is now ready ~or another pressure stroke.
, ' ''', ~RY 01 ~90 14:46 KRNE/D~LSIMER&ET P.7/19 2~5~
,. . i Accordingly, the foregoing pump characteristics, objects and adv~ntages are most e~fectively attained.
Thus a double acting trigger actuated pump is provided with:
1) higher adjustable pump pre6sure;
2) longer ad~ustable trigger stroke; ~ -3) greater adjustable pump volume; -4) a vent that is sealable directly to the chamber;
~ented with product being dispensed ~rom the pump chamber;
- Figure 3 is a sim~lar view during the suction stroke with the product drawn into the primary pump chamber with the product being dispensed from the supplemental pump chamber, DBTA~L~D DE8CR~PTIO~
In the drawin~s a double acting trigge~ actuated pump lO is shown associa~ed with the tbreaded neck 12 of container or bottle 14 containing the product to be di~pensed. Towards this end an internally threaded cap 16 extends across the opening of the neck 12 and threadedly mates therewith in securing the pump lO on bottle 14. The cap 16 secures the pump base 18 and seals it across the opening of the neck 12 by engaging ~;
the circumferentially extending lip 20. ~ase ~8 includes a downwardly depending boss 22 which supports dip tube 24, which communicates with passage 26 for product ~low. The base is also provided with vent opening 28 cooperating in venting the head space of the bottle 14.
~ he pump lO is provided with an ou~er shell 30 and a concentric inner shell 32 both suppor~ed on base 18 ;
and both having a closed inner end 30a and 32a respectful}y. ~he outer shell 30 and inner shell 3~
define a product chaFber 34 which communic~tes with passage 26 for reception o~ product to be dispensed.
The vent opening 28 extends through the inner shell 32 ~or eventual communication with the atmosphere as will be described shortly. The inner end 32a of inner shell 32 i~ provided with a valve seat 36 which receives a ~all check valve 38 for closing of2 pump chamber 40 ~ithin inner shell 32 and isolat1ng it from the product chamber 34 during the pressure stroke.
.~ ' MhY 01 '90 14: 44 K~INE/D~LSIMER&ET P. 4/19 2(~5~60 ~he valve 38 will open to permit product to enter the primary pump c~. mber 40 ~rom the product chamber 34 during the section stroke. ~he outer open ends of the outer shell 30 and inner shell 32 are provided with a retaining ring 41 which retains a spaced concentrical relationship of the shell parts and at the same time cooperates in maintaining the coaxial relationship of ~he piston 42. Mo~e importantly, this retaining ring 41 cooperates with the piston 42 and providing a supplemental pump chamber which contributes to the double action of the pump 10. The piston 42 includes an inner double pis~on seal 44 having a pair of seal~ng lip~ 46 and 48 which form slidlng seals with the interior of the inner shell 32. ~he piston 42 is also provided with a coaxial bore 50 in the piston rod 52. The piston rod i5 pro~ided with a sealing lip 53 which engages with the retaining ring 41 in sealing the vent opening 28 when the pump is in it~ shipping condi~ion as depicted in Figure 1. A piston return spring 49 is biased against the double piston seal 44 ~ ;
and the inner shell wall 32a. It is also contemplated that this spring could be readily externally mounted.
The outer end 54 of the piston rod 52 mounts a discharge no2zle 56 which may be of any suitable des~gn to gene~ate the desired discharge patterns.
The double piston ~eal 44 is provided with a valve seat 58 coaxlal with the bore 50 in the piston rod and cooperates with a ball check valve 60. The valve 60 assumes a closed position during the suction stro~e and unseats during ~he pressure stroke.
In order to activate the piston 42, d trigger mechanism 62 is employed. ~he trigger mechanism 62 ;~
includes a trigger 64 suitab~y pivoted at 65 to the trigger cupport 66 which may be inte~ral with ~he , '~ .':
~ Y 01 '90 14:45 K~lNE/DQLSI~1~R&ET-- p 5/19 . .
'' 2~LS86~
. 4 outer shell 30. ~he trigger 64 is provided with an actuator surfacc ~8 designed to engage piston actuated plate 70 extending la~erally from piston rod 52. The zone of engagement or the trigger surface 68 ànd the plate 70 is of a sliding nature to provide as near as possible, a direction of force parallel to the axis of the piston rod 52 as the trigger 64 is pulled and the piston 42 is moved axially from its retracted position to its forward position during the pressure stroke.
In order to obtain dispensing or discharg~ of product during the suc~ion stroke, a s~pplemental pump chamber 74 is defined between exterior surfaces o~ the piston rod 52 and internal surfaces of the inner shell 32 and the in~ernal sealing lip 16 of th~ retaining ring 41. Access to the supplemen~al pump chamber 74 is obtained through lateral passages 78 at the ~orward end of the piston rod 52 and a clearance 80 between ~orward circu~ferentlally extending surfaces of the piston rod 52 and internal surfaces of the inne~ shell 32.
In operation of ~he pump lO, i~ will be assumed that initially, ~he pump will be ~ully p~imed with product to be dispensed in the primary pump cham~er and the pi5~0n 42 is ln its fully retracted position as shown in figure l. In this po~i~ion, which is also the end of the suction stroke or start of the pressure stroke, the ball 38 will be sealed against seat 36, the vent ~8 will be closed to the atmosphere. In order to dispen~e product, the trigger 64 will be pulled and the sliding engagemen~ of the actuation surface 68 against the plate 70 will force the piston rod ~2, and, consequently, the double piston seal 44 ~orwardly as shown in Figure 2. $his movement will initiate the pressure stroke with the rl~Y 01 ' 90 14: 45 Kf~NI~/DRLSI~1ER&ET P . 6/19 21~58~
product being forced out of the chamber 40, bypassing unseated ball v_lve 60, through bore 50 out through the nozzle S6 and into the desired discharged pattern onto ~he selected surface. In addition product will flow through the lateral passages 78 through clearance 80 into the supplemental pump chamber 74. As the t~igger 64 ls pul.led further causing the double piston seal 44 to bottom in the pump chamber 40 if this be the desired or selected stroke of the piston. It will be noted that during this move~ent, the vent passage 28 will be opened to vent the container headspace to atmosphere to replace product dispensed with air.
At the start of the suction stroke, the trigger mechanism 62 is released, and the spring 49 biased against inner shell wall 32a and double piston seal 44, will urge the pi~ton 42 to its retracted position as shown schematically in Figure 3. ~he valve 60 will close against its seal 58 and inlet valve 38 will ,, open. The product in the container 14 will be ~orced . ;~
up dip tube 2~ into passage 26 and chamber 34 passed the valve 38 into primary pump chamber 40. During the retraction of the piston 42, product in the supplemental pump chamber 74 will be forced through the clearance 80 into lateral passages 18 through bore ~ . :
~o and out through the nozzle 56. Eventually, the .
piston 42 will app~oach its fully retracted position at which the desired amount of product will be pulled .. ~ :.
into primary pump chamber 40 and the product ~in .;-~ :
supplemental pump chamber 74 vill be discharged. This ..
a fully retracted position is represented by Figure 1 .;
with both val~es 38 and 60 seated and closed and vent 28 closed. The pump 10 is now ready ~or another pressure stroke.
, ' ''', ~RY 01 ~90 14:46 KRNE/D~LSIMER&ET P.7/19 2~5~
,. . i Accordingly, the foregoing pump characteristics, objects and adv~ntages are most e~fectively attained.
Thus a double acting trigger actuated pump is provided with:
1) higher adjustable pump pre6sure;
2) longer ad~ustable trigger stroke; ~ -3) greater adjustable pump volume; -4) a vent that is sealable directly to the chamber;
5) adjustable trigger leverage;
6) adjustable pump chamber diameter;
1) no pump leakage;
8) pu~p cen~ered on neck of container; znd, -9) ability to use a shroud over pump if desired.
Thus the several a~orenoted objects and advantages are most effectively attained. Although a single 60mewhat preferred embodiment has been disclosQd and described in detail herein, it should be understood that this invention is in no sense limited thereby and ~;
itQ scope is to he determined by that of the appended ~ ' claims. ~;,' .
: .
.,:
~', :
1) no pump leakage;
8) pu~p cen~ered on neck of container; znd, -9) ability to use a shroud over pump if desired.
Thus the several a~orenoted objects and advantages are most effectively attained. Although a single 60mewhat preferred embodiment has been disclosQd and described in detail herein, it should be understood that this invention is in no sense limited thereby and ~;
itQ scope is to he determined by that of the appended ~ ' claims. ~;,' .
: .
.,:
~', :
Claims (24)
1. A double acting dispensing pump for dispensing product from a container via a dip tube, the pump serving as a container closure comprising:
a cylinder having a forward and a rearward end and having an inner shell open at its rear end and a closed forward end;
a piston having a forward and rear end and being reciprocally mounted in the inner shell and defining a primary pump chamber therewith, the piston being relatively reciprocal through a pressure stroke from an extended position to an inserted position and through a suction stroke from the inserted position to the extended position;
passage means for transmitting product from the dip tube rearwardly to a location substantially approaching the rear end of the inner shell and offset from the dip tube:
a supplemental pump chamber between surfaces of the inner shell and piston;
means for directing product from the primary pump chamber out from the pump and in a selected discharge pattern during the pressure stroke; and means for directing product from the supplemental pump chamber out from the pump and in the desired discharge pattern during the suction stroke.
a cylinder having a forward and a rearward end and having an inner shell open at its rear end and a closed forward end;
a piston having a forward and rear end and being reciprocally mounted in the inner shell and defining a primary pump chamber therewith, the piston being relatively reciprocal through a pressure stroke from an extended position to an inserted position and through a suction stroke from the inserted position to the extended position;
passage means for transmitting product from the dip tube rearwardly to a location substantially approaching the rear end of the inner shell and offset from the dip tube:
a supplemental pump chamber between surfaces of the inner shell and piston;
means for directing product from the primary pump chamber out from the pump and in a selected discharge pattern during the pressure stroke; and means for directing product from the supplemental pump chamber out from the pump and in the desired discharge pattern during the suction stroke.
2. A double acting dispensing pump for dispensing product from the container, the pump serving as a container closure comprising:
a cylinder having a forward end and rearward end having an inner shell open at its rear end and closed at its forward end, and an outer shell surrounding the inner shell and defining a cavity there between;
a piston having a forward end rear end and being reciprocally mounted in the inner shell and defining a primary pump chamber therewith, and the piston being relatively reciprocal through a pressure stroke from an extended position to an inserted position and through a suction stroke from an inserted position to the extended position;
inlet port means including a passage in the outer shell for cooperating in communicating the container interior with the primary pump chamber during the suction stroke to permit product to pass through the inlet port means into the cavity and then into the pump chamber;
outlet port means for product to be dispensed under pressure from the primary pump chamber during the pressure stroke;
venting means for replacing product removed from the container interior into the pump chamber with air;
a supplemental pump chamber defined by cooperating surfaces of the inner shell and the piston;
supplemental port means for communicating the supplemental pump chamber with the outlet port means;
outlet valve means at the forward end of the piston for communicating the primary pump chamber with the outlet port means during the pressure stroke for directing product from the primary pump chamber through the outlet port means and for directing product through the supplemental port means into the supplemental pump chamber, She outlet valve means operating to seal the communication between She primary pump chamber and the outlet port means during the suction stroke while permitting product in the supplemental pump chamber to be directed to the supplemental port means through the outlet port means;
and inlet valve means for opening the inlet port means during the suction stroke and for closing the inlet port means during the pressure stroke.
a cylinder having a forward end and rearward end having an inner shell open at its rear end and closed at its forward end, and an outer shell surrounding the inner shell and defining a cavity there between;
a piston having a forward end rear end and being reciprocally mounted in the inner shell and defining a primary pump chamber therewith, and the piston being relatively reciprocal through a pressure stroke from an extended position to an inserted position and through a suction stroke from an inserted position to the extended position;
inlet port means including a passage in the outer shell for cooperating in communicating the container interior with the primary pump chamber during the suction stroke to permit product to pass through the inlet port means into the cavity and then into the pump chamber;
outlet port means for product to be dispensed under pressure from the primary pump chamber during the pressure stroke;
venting means for replacing product removed from the container interior into the pump chamber with air;
a supplemental pump chamber defined by cooperating surfaces of the inner shell and the piston;
supplemental port means for communicating the supplemental pump chamber with the outlet port means;
outlet valve means at the forward end of the piston for communicating the primary pump chamber with the outlet port means during the pressure stroke for directing product from the primary pump chamber through the outlet port means and for directing product through the supplemental port means into the supplemental pump chamber, She outlet valve means operating to seal the communication between She primary pump chamber and the outlet port means during the suction stroke while permitting product in the supplemental pump chamber to be directed to the supplemental port means through the outlet port means;
and inlet valve means for opening the inlet port means during the suction stroke and for closing the inlet port means during the pressure stroke.
3. The invention in accordance with claim 2 wherein the inlet valve means is disposed at the forward end of the inner shell.
4. The invention in accordance with claim 3 wherein the forward end of the inner shell includes an opening communicating the pump chamber with the cavity, the inlet valve means includes a valve seat and a ball coupled with a seal for opening and closing the inner shell opening.
5. The invention in accordance with claim 2 wherein the passage of the inlet port means is adapted to be substantially coaxially located within the neck of the container.
6. The invention in accordance with claim 5 wherein a dip tube is coupled with the passage.
7. The invention in accordance with claim 6 wherein a pump base extends outwardly from the outer shell and includes the passage and a cap means coupled with the base for coupling the pump to the neck of the container.
8. The invention in accordance with claim 2 wherein the vent means includes a passageway through the cylinder and communicates the interior of the container with the atmosphere during the reciprocation of the piston and the passageways adapted to be sealed from the atmosphere by the piston when the piston is in a fully extended retracted position.
9. The invention in accordance with claim 8 wherein the passageway extends into the outer and inner shells.
10. The invention in accordance with claim 2 wherein the inner and outer shells are concentric tubular members connected substantially at the open rear ends.
11. The invention in accordance with claim 2 wherein the piston includes a longitudinally extending bore forming part of the outlet port means and communicates the pump chamber with the ambient.
12. The invention in accordance with claim 11 wherein a nozzle is coupled with the rear end of the piston for directing the product to be dispensed in a predetermined spray pattern as it emerges therefrom.
13. The invention in accordance with claim 2 wherein a trigger mechanism is coupled with the piston for reciprocating the piston between the extended and inserted position.
14. The invention in accordance with claim 13 wherein the trigger mechanism includes a trigger having a upper and a lower end, pivot means pivotally connecting the upper end of the trigger to an upper extension of the outer shell, a finger engaging surface on the lower end of the trigger for digital engagement, a piston actuation means on the piston intermediate the piston ends for sliding engagement with the trigger to thereby minimize turning moments on the piston as it is reciprocated by movement of the trigger when the trigger is digitally engaged at its lower end to pivot the trigger about the trigger means.
15. The invention in accordance with claim 14 wherein the piston actuator means is a laterally extending plate engaged by the trigger.
16. The invention in accordance with claim 15 wherein biasing means urges the piston towards its extended position, the bias is adapted to be overcome by pulling the trigger upon digital engagement of the trigger lower end.
17. The invention in accordance with claim 16 wherein the biasing means is a spring extending between the inner end of the inner shell and forward end of the piston.
18. The invention in accordance with claim 2 wherein the piston forward end is provided with a double piston seal which cooperates in sealing the primary pump chamber and supplemental pump chamber during reciprocation of the piston.
19. The invention in accordance with claim 18 wherein the outlet valve means is located in the double piston seal.
20. The invention in accordance with claim 2 wherein a retaining ring is provided at the rear open end of the inner and outer shell and includes a sealing lip at its forward end that cooperates with the inner shell and outer surfaces of the piston in defining the supplemental pump chamber.
21. The invention in accordance with claim 20 wherein a double piston seal is at the forward end of the piston and cooperates with the retaining ring inner shell and outer surfaces of the piston in defining the supplemental pump chamber.
22. A double acting dispensing trigger pump for dispensing product from the container, the pump serving as a container closure comprising:
a cylinder having a forward end and rearward end having an inner shell open at its rear end and closed at a forward end, and an outer shell surrounding the inner shell and defining a cavity there between;
a piston having a forward end rear end and being reciprocally mounted in the inner shell and defining a primary pump chamber therewith, and the piston being relatively reciprocal through a pressure stroke from an extended position to an inserted position and through a suction stroke from an inserted position to the extended position;
inlet port means including a passage in the outer shell for cooperating in communicating the container interior with the primary pump chamber during the suction stroke to permit product to past through the inlet port means into the cavity and then into the pump chamber;
outlet port means for product to be dispensed under pressure from the primary pump chamber during the pressure stroke;
venting means for replacing product removed from the container interior into the pump chamber with air;
a supplemental pump chamber defined by cooperating surfaces of the inner shell and the piston;
supplemental port means for communicating the supplemental pump chamber with the outlet port means;
outlet valve means at the forward end of the piston for communicating the primary pump chamber with the outlet port means during the pressure stroke for directing product from the primary pump chamber through the outlet port means and for directing product through the supplemental port means into the supplemental pump chamber, the outlet valve means operating to seal the communication between the primary pump chamber and the outlet port means during the suction stroke while permitting product in the supplemental pump chamber to be directed to the supplemental port means through the outlet port means;
outlet valve means for opening the inlet port means during the suction stroke and for closing the inlet port means during the pressure stroke;
a trigger mechanism coupled with a piston for reciprocating the piston between the extended and inserted position;
the piston including a longitudinally extending bore forming part of the outlet port means and communicating the primary pump chamber with the ambient, the piston including a double piston seal at its forward end having a valve seat coaxial with the bore of the piston and forming part of the outlet valve means:
a retaining ring coupling the rear open end of the inner and outer shells and surrounding the piston, the retaining ring having a forward sealing lip which cooperates with the double piston seal, inner shell and outer surfaces of the piston in defining the supplemental pump chamber.
a cylinder having a forward end and rearward end having an inner shell open at its rear end and closed at a forward end, and an outer shell surrounding the inner shell and defining a cavity there between;
a piston having a forward end rear end and being reciprocally mounted in the inner shell and defining a primary pump chamber therewith, and the piston being relatively reciprocal through a pressure stroke from an extended position to an inserted position and through a suction stroke from an inserted position to the extended position;
inlet port means including a passage in the outer shell for cooperating in communicating the container interior with the primary pump chamber during the suction stroke to permit product to past through the inlet port means into the cavity and then into the pump chamber;
outlet port means for product to be dispensed under pressure from the primary pump chamber during the pressure stroke;
venting means for replacing product removed from the container interior into the pump chamber with air;
a supplemental pump chamber defined by cooperating surfaces of the inner shell and the piston;
supplemental port means for communicating the supplemental pump chamber with the outlet port means;
outlet valve means at the forward end of the piston for communicating the primary pump chamber with the outlet port means during the pressure stroke for directing product from the primary pump chamber through the outlet port means and for directing product through the supplemental port means into the supplemental pump chamber, the outlet valve means operating to seal the communication between the primary pump chamber and the outlet port means during the suction stroke while permitting product in the supplemental pump chamber to be directed to the supplemental port means through the outlet port means;
outlet valve means for opening the inlet port means during the suction stroke and for closing the inlet port means during the pressure stroke;
a trigger mechanism coupled with a piston for reciprocating the piston between the extended and inserted position;
the piston including a longitudinally extending bore forming part of the outlet port means and communicating the primary pump chamber with the ambient, the piston including a double piston seal at its forward end having a valve seat coaxial with the bore of the piston and forming part of the outlet valve means:
a retaining ring coupling the rear open end of the inner and outer shells and surrounding the piston, the retaining ring having a forward sealing lip which cooperates with the double piston seal, inner shell and outer surfaces of the piston in defining the supplemental pump chamber.
23. The invention in accordance with claim 22 wherein the forward end of the piston includes lateral passageways communicating with the outlet port means, a clearance between the piston and the inner shell that communicates the lateral passageways with the supplemental pump chamber, whereby when the pump piston is fully extended at the start of the pressure stroke, the inlet valve is closed and the outlet valve is closed, when the trigger mechanism is actuated to initiate the pressure stroke the inlet valve remains closed and the outlet valve opens to permit product to bypass it and flow out through the outlet port means to discharge the product from the pump and simultaneously direct product to the lateral passageways through the clearance into the supplemental pump chamber, and when the product has been fully dispensed at the end of the pressure stroke, and the piston is retracted the inlet valve opens to permit product to pass into the primary pump chamber from the container and at the same time the outlet valve closes, upon retraction of the piston product in the supplemental pump chamber will the forced out through the lateral passageways through the clearance out through the bore of the piston to be discharged from the pump.
24. The invention in accordance with claim 23 biasing means urges the piston outwardly to its retracted position during the suction stroke to facilitate discharged product from the supplemental pump chamber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US1989/001845 WO1990013497A1 (en) | 1989-05-01 | 1989-05-01 | Double acting pump |
| USPCT/US89/01845 | 1989-05-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2015860A1 true CA2015860A1 (en) | 1990-11-01 |
Family
ID=22214972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002015860A Abandoned CA2015860A1 (en) | 1989-05-01 | 1990-05-01 | Double acing pump |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0424396A4 (en) |
| CA (1) | CA2015860A1 (en) |
| WO (1) | WO1990013497A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6468523B1 (en) | 1998-11-02 | 2002-10-22 | Monsanto Technology Llc | Polypeptide compositions toxic to diabrotic insects, and methods of use |
| US7070071B2 (en) | 2002-09-23 | 2006-07-04 | Agouron Pharmaceuticals, Inc. | Dispensing apparatus and method for liquid products, particularly medicinal products |
| SE0202800D0 (en) * | 2002-09-23 | 2002-09-23 | Pharmacia Ab | Dispensing apparatus and method for liquid products, particularly medicinal products |
| CN107117381A (en) * | 2017-06-20 | 2017-09-01 | 上海帝凡奇机电设备有限公司 | A kind of double pump double acting hand fastening type sprayer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR479746A (en) * | 1915-08-30 | 1916-05-03 | Alfred William French | Improvements to devices for spraying a jet of liquid |
| US3583605A (en) * | 1969-01-17 | 1971-06-08 | Diamond Int Corp | Liquid dispensing pump |
| US3531224A (en) * | 1969-04-07 | 1970-09-29 | Cook Chem Co | Hand pump having free floating valve |
| CS242610B1 (en) * | 1982-11-19 | 1986-05-15 | Miloslav Sorm | Double acting mechanical pump for liquid spray |
| US4591077A (en) * | 1985-01-28 | 1986-05-27 | Corsette Douglas Frank | Continuous discharge dispenser |
| US4826052A (en) * | 1987-07-06 | 1989-05-02 | Leeds And Micallef | Trigger pump |
-
1989
- 1989-05-01 EP EP19890905278 patent/EP0424396A4/en not_active Withdrawn
- 1989-05-01 WO PCT/US1989/001845 patent/WO1990013497A1/en not_active Application Discontinuation
-
1990
- 1990-05-01 CA CA002015860A patent/CA2015860A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP0424396A1 (en) | 1991-05-02 |
| WO1990013497A1 (en) | 1990-11-15 |
| EP0424396A4 (en) | 1991-12-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |