CA1308398C - Flowable material dispenser - Google Patents
Flowable material dispenserInfo
- Publication number
- CA1308398C CA1308398C CA000581710A CA581710A CA1308398C CA 1308398 C CA1308398 C CA 1308398C CA 000581710 A CA000581710 A CA 000581710A CA 581710 A CA581710 A CA 581710A CA 1308398 C CA1308398 C CA 1308398C
- Authority
- CA
- Canada
- Prior art keywords
- housing
- key operable
- operable means
- chamber
- volume
- 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.)
- Expired - Fee Related
Links
Abstract
ABSTRACT OF THE DISCLOSURE
A dispenser for flowable materials in which the flowable material is moved from a reservoir for such materials into a variable volume measuring chamber, the volume of which is adjustable only by an external key, and thereafter to a discharge opening remote from the measuring chamber, which opening has a closure to control dispersion of the granules.
A dispenser for flowable materials in which the flowable material is moved from a reservoir for such materials into a variable volume measuring chamber, the volume of which is adjustable only by an external key, and thereafter to a discharge opening remote from the measuring chamber, which opening has a closure to control dispersion of the granules.
Description
6959~-45 BACKGROUN~ OF T~IE INVENTION
This invention relates to a device for containing, measuring and dispensing flowable materials and, in particular, to such a device which is hand held and hand operable.
The prior art discloses various flowable material dispensing devices containing a measuring chamber having a variable volume may be adjusted by rotating an externally accessible knob which causes the volume of the chamber to change. Among these disclosures are those in United States Patents 3,013,698 to Gordan et al, 3,090,524 to Corcoran, 3,145,883 to Geroux, 4,151,933 to Myers, and French patent published application No. 2,298,091. In many instances it is desirable that the adjustment for such variable volume measuring and dispensing devices be made relatively inaccessible to ready adjustment, yet easily adjusted when so desired. This is especially true when such devices are used to measure and dispense flowable materials for human consumption, ~` for example, powdered or granular drugs and the like. Where such devices are brought into the home for consumer use, it is important that changes to the measuring volume of the dispenser be made relatively inaccessible to adjustment either inadvertently or by unauthorized persons such as children.
This invention relates to a device for containing, measuring and dispensing flowable materials and, in particular, to such a device which is hand held and hand operable.
The prior art discloses various flowable material dispensing devices containing a measuring chamber having a variable volume may be adjusted by rotating an externally accessible knob which causes the volume of the chamber to change. Among these disclosures are those in United States Patents 3,013,698 to Gordan et al, 3,090,524 to Corcoran, 3,145,883 to Geroux, 4,151,933 to Myers, and French patent published application No. 2,298,091. In many instances it is desirable that the adjustment for such variable volume measuring and dispensing devices be made relatively inaccessible to ready adjustment, yet easily adjusted when so desired. This is especially true when such devices are used to measure and dispense flowable materials for human consumption, ~` for example, powdered or granular drugs and the like. Where such devices are brought into the home for consumer use, it is important that changes to the measuring volume of the dispenser be made relatively inaccessible to adjustment either inadvertently or by unauthorized persons such as children.
2 ~J~
1 30~339~
, ,~
6sss2-4s SUMMARY OF THE INVENTION
It is therefor a principal object of the present invention to provide a device for measuriny and dispensing ~lowable material in which ~he adjustment of ~he measured volume of flowable material to be dispensed is relatively inaccessible yet ma~ be easily made by authorized persons when desired.
The invention provides a flowable material dispenser comprising a housing, variable volume chamber means in the housing for measuring a predetermined amount of flowable material, outlet means for dispensing measured amounts of flowable material from the chamber means, and key operable means rotatable for varying ~he volume of the chamber means, the housing supporting the key operable means for linear movement between a locked position and unlocked position, the key operable means in locked position being in inkerference with the housing for restricting rotary movement of the key operable means relative to the housing while permitting said linear movement between said locked and unlocked positions, the key operable means in unlocked position being free to rotate relative to the housing for varying the volume of the chamber means ln response to rotation of the key operable means for selectively dispensing a predetermined volume of flowable material from the chamber means.
1 30~3q8 6~5g~-4~;
The improved device for measuring and dlspensing flowable material preferably is easily assemblecl, formed from a minimum number of parts, low in cost, and can be disposed of when the flowable material has been exhausted. The device i5 preferably relatively child-proof in adjustment, and may on].y be adjusted by means oP a key.
A better understanding of the advantages, features, properties and relations of the invention will be obtained from the following detailed description and accompanying drawings which are set forth in an illustrative embodiment and are indicative of the way in which the principles of the invention are employed.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of one embodiment of the present invention;
FIG. 2 is a cross section of the embodi~ent of FIG. 1 in an upright measuring position;
FIG. 3 is a cross section of the embodiment of FIG. 1 in an inverted dispensing position;
~0 FIG. 4 is an end view of the upper outlet end of the embodiment of FIG. l;
FIG. 5 is a bottom view of the lower adjustment end of the embodiment of FIG. 1; and FIG. 6 is an exploded view, in perspective, of the preferred adjustment mechanism of the embodiment oP FIG. 1.
~t 1 3~)~3q8 695~2-~5 Directlonal terms are used herein ln reference to the dlspenser in lts normal uprlyht measuring position in FIGS. 1 and 2, but it is to be understood that such directional terminology is employed for convenience of description and it is not to be regarded in any way as limiting the invention.
In FIG. 1 there is shown a preferred embodiment of the present invention wherein the measuring and dispensing device is of size and shape so as to be hand operable.
Preferably the device components are made of plastic or other light weight material which is of economical construction to permit disposal of the device after the contents are exhausted.
The present invention is adapted for flowable materials in ~eneral, but is especially adapted for solid materials in granular, comminuted or pulverulent form.
The device of this invention is shown in its normal upright measuring position in FIGS. 1 and 2. The dispensing ?
1 30~3q8 -device or dispenser 10 comprises a vessel 14 slidably mounted over a housing 12. Vessel 14 contains a reservoir 16 for the flo~able material as well as a discharge passageway 2~, each of which may be alterna~ely slid into communication with a measuring chamber 26 in housing 12 by translational motion of vessel 14 effected by gripping knob 14A with the fingers of the hand llolding the device housing 12. As illustrated, spring 50 biases vessel 14 into a normal position shown in FIG. 2 wherein reservoir 16 communicates with measuring chamber 26. A cover assembly 1~ seals the discharge outlet of the vessel 14.
In the cross sectional view of FIG. 2, dispenser 10 is shown in its upright measuring pOsitioll. Reservoir 16 formed withln vessel 14 has a lower fill passageway 24 extending toward and communlcating with measuring chamber 26 below in housing 12. To fill measuring chamber 26 it is merely necessary to slidably position lower fill passageway 24 over chamber 26 and allow the flowable material in reservoir 16 to be gravity-fed thereto. Adjacent to reservoir 16 in vessel 14 is discharging passageway 2~ for the measured flowable material which extends from the lower portion of vessel 14 to the upper discharging end.
Vessel 14 may be translationally slid relative to housing 12 so that measuring chamber 26 in housing i2 is out of communication with reservoir 16 and in communication with dispensing passageway 2~. As shown in FI~. 3 thc device 10 is thell inverted from its position in FIG. 2 (the key whicll is normally removed is shown in phantom lines) to allow the 1 30~39~
contents of measuring chamber 26 to be dispensed through passageway 2~ and out through discharge opening 31 into a suitable receptacle. The width of tlle lower portion of the wall wllich separates the reservoir lower fill passageway 24 and dispensing passageway 2~ is wide enough ~o prevent the flow of granules from reservoir 16 to passageway 2~ through measuring chamber 26. Accordingly, reservoir 16 is never in communication with dispensing passageway 2~ during any portion of the translational sliding motion between ~easuring and dispensing positions.
The smooth central bore of measuring chamber 26 is formed in the wall of housing extension 36. The outer surface of extension 36 is conventionally threaded and communicates with a piston sleeve 37 connected at its lower end to piston 40. In the preferred embodiment the multiple pitch assembly 36a is a quad thread with one thread removed to provide a single proper angular alignment with sleeve 37, thus rotation of piston sleeve 37 causes movement of piston 40 up and down in chamber 26 (toward and away9 respectively, from vessel 14) to vary the volume of chamber 26. Thus, accurate measurement of flowable material is achieved by filling chamber 26 from reservoir 16, and, while still in the upright position, sliding vessel 14 to the dispensing position whereupon excess flowable material is removed by the lowe`r lip of the wall separating passageways 24 and 2~.
To effect rotation of sleeve piston 37 and adjustn)ent of chamber 26, there is provided in ho~lsillg 12 an adjustmcnt 1 7)o~3qs knob 52. Adjustment knob 52 is rotatable about its longitudinal axis and includes an annular sleeve 49 which slips over and is coaYial with piston sleeve 37. As seen in FIGS. 2 and 6, piston sleeve 37 contains a longitudinally extending tab 3~ on its outer surface whicll slidably mates ~ith corresponding adjustment knob slot 53 along the inner wall of adjustment knob annular sleeve 49. Thus, rotation of adjustment knob 52 effects rotational movement to piston sleeve 37 while allowing sleeve 37 to slide longitudinally. Base cover 5~ snaps over the lower end of housing 12 and limits access to adjustment knob 52 except through a central key opening 57.
To rotate adjustment knob 52, there is provided a key 61 having prongs or teeth 63 which are of a size which permits their insertion through key opening 57 and into engagement with corresponding complementary adjustment knob bosses or teeth 65 to permit rotation of adjustment knob 52; these features are most clearly seen in FIGS. 2 and 5. The size of base cover key opening 57 and the extension of adjustment knob teeth 65 are such that fingers or objects other than key 61 may not be used to adjust knob 52.
To further limit inadvertent adjustment of knob 52, there is provided a "push to turn" feature utilizing key 61.
The lower end of adjustment knob 52 includes a flanged head 56 on which is provided at least one detent tab 55 which may be longitudinally slid into corresponding clctent slots 59 in the base cover to prevcnt rotation of adjustlller)t kno1) 52.
Adjustment knoh 52 is longitudinally slidable witll respect to q ~
6'3592-45 housing 12 on plston sleeve 37 so that ~etent tab 55 rnay be slld upward and out 0~ detent 810t 59 thereby permltting rota-tion of knob 52. A compresslon spring 54 between the upper transverse wall of housing 12 and a shoul~er 51 on ad~ustment knob 52 blases the detent tab 55 lnto engagement with a detent slot 59. Thus, in order to ef~ect rotation of ad~ustment ~nob 52, the key teeth 63 of key 61 must be lnserted into engagement wlth ad~ustment knob 52 and pushed longitudinally inward and upward to disengage the detent tab 55 and slot 59. Key 61 may then be rotated to rotate ad~ustment knob 52.
As seen ln FIG. 5, the houslng 12 base cover 58 is provlded with a base cover opening 67 whlch permits viewlng of graduated lndlcia 62 on the lower face o~ ad~ustment knob head 56. The mlcrometer lndlcla 62 lndicates a dosage level or other lndlcatlon of volume of measurlng chamber 26 whlch has been provided by sultable rotatlon o~ ad~ustment knob 52, plston sleeve 36 and piston 40. Upon pushlng and turnlng key 61 to ad~ust knob 52, the deslred dosage level may be vlewed at the houslng base cover 58.
To facllltate and control dlspenslng of hard partl-cles of granular materlal, the present lnventlon also provldes a cover member 1~3 (FIGS. 1, 2, 3 and 4) over vessel 14 to break the momentum of granular partlcles belng dlspensed into a receptical as devlce 10 ls lnverted. Turnlng to FIGS. 2 and 3, cover 1~ lncludes a dlscharge openlng 31 whlch ls connected to the upper end of dlscharge passageway 28 and a cap 32 whlch ls plvotable about an axls 33 between an opened posltlon (~IG. 3) and a closed posltlon (FIG. 2). An extenslon 3~ on cap 32 ls provlded so that a flnger or, preferably the thumb, e.g., of the hand grasping the devlce 10 may be utlllzed to open cap 32 and allow granular partlcles to be dispensed from discharge openlng 31. A sprlng member 35 ls molded lnto extenslon 34 to t g : 1 ~0~3~
~ 9~92-45 act agalnst ~he lower portion of cover 18 an~ bias cap 32 lnto lts closed posltlon. A sultable seal (not shown) ls provlded between discharge openin~ 31 and cap 32 to prevent contamlna-tion of the discharge passageway 28 an~ other lnterlor contents of dlspenser lO when the cap 15 closed.
As shown ln t,he dlspenslng posltlon ln FIG. 3, the openlng provi~ed by open cap member 3Z ls such that particles falllng from measurlng chamber 26 through dispensing passageway 28 and out of dlscharge opening 31 must lmpact the lnterlor of the cap 32, even if the device 10 is held at some dlspensing angle other than the vertlcal dispensing position as shown ln FIG. 3. ~y providing this ~eature that granular partlcles must impact cap 32 as they fall over the length of discharge passageway 28, the cap 32 ensures that the momentum of the partlcles ls greatly reduced as they are dlspensed onto a spoon or other receptacle. Consequently, the common effect of hard granular particles bouncing out of the spoon or other recep-tacle ls prevented. Preferably, cap 32 will remain closed until all of the ~ranular particles to be dispensed are at the X~
1 30~3~
discharge opening 31 to ensure that particle momentum is as low as possible as the particles are being dispensed.
The momentum-breaking feature of cover assembly l~
has been found to be especially useful in dispensing hard spherical granules of ~.023 inches diameter to 0.~7 inches diameter where the length of the discharge passageway for such granules is substantially equal to or more than 0.5 inches.
As will be apparent to persons skilled in the art, various modifications, adaptations and variations of the foregoing specific disclosure can be made without departing from the spirit and scope of this invention.
Having thus described the invention, what is claimed 1 5 :
.
1 30~339~
, ,~
6sss2-4s SUMMARY OF THE INVENTION
It is therefor a principal object of the present invention to provide a device for measuriny and dispensing ~lowable material in which ~he adjustment of ~he measured volume of flowable material to be dispensed is relatively inaccessible yet ma~ be easily made by authorized persons when desired.
The invention provides a flowable material dispenser comprising a housing, variable volume chamber means in the housing for measuring a predetermined amount of flowable material, outlet means for dispensing measured amounts of flowable material from the chamber means, and key operable means rotatable for varying ~he volume of the chamber means, the housing supporting the key operable means for linear movement between a locked position and unlocked position, the key operable means in locked position being in inkerference with the housing for restricting rotary movement of the key operable means relative to the housing while permitting said linear movement between said locked and unlocked positions, the key operable means in unlocked position being free to rotate relative to the housing for varying the volume of the chamber means ln response to rotation of the key operable means for selectively dispensing a predetermined volume of flowable material from the chamber means.
1 30~3q8 6~5g~-4~;
The improved device for measuring and dlspensing flowable material preferably is easily assemblecl, formed from a minimum number of parts, low in cost, and can be disposed of when the flowable material has been exhausted. The device i5 preferably relatively child-proof in adjustment, and may on].y be adjusted by means oP a key.
A better understanding of the advantages, features, properties and relations of the invention will be obtained from the following detailed description and accompanying drawings which are set forth in an illustrative embodiment and are indicative of the way in which the principles of the invention are employed.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of one embodiment of the present invention;
FIG. 2 is a cross section of the embodi~ent of FIG. 1 in an upright measuring position;
FIG. 3 is a cross section of the embodiment of FIG. 1 in an inverted dispensing position;
~0 FIG. 4 is an end view of the upper outlet end of the embodiment of FIG. l;
FIG. 5 is a bottom view of the lower adjustment end of the embodiment of FIG. 1; and FIG. 6 is an exploded view, in perspective, of the preferred adjustment mechanism of the embodiment oP FIG. 1.
~t 1 3~)~3q8 695~2-~5 Directlonal terms are used herein ln reference to the dlspenser in lts normal uprlyht measuring position in FIGS. 1 and 2, but it is to be understood that such directional terminology is employed for convenience of description and it is not to be regarded in any way as limiting the invention.
In FIG. 1 there is shown a preferred embodiment of the present invention wherein the measuring and dispensing device is of size and shape so as to be hand operable.
Preferably the device components are made of plastic or other light weight material which is of economical construction to permit disposal of the device after the contents are exhausted.
The present invention is adapted for flowable materials in ~eneral, but is especially adapted for solid materials in granular, comminuted or pulverulent form.
The device of this invention is shown in its normal upright measuring position in FIGS. 1 and 2. The dispensing ?
1 30~3q8 -device or dispenser 10 comprises a vessel 14 slidably mounted over a housing 12. Vessel 14 contains a reservoir 16 for the flo~able material as well as a discharge passageway 2~, each of which may be alterna~ely slid into communication with a measuring chamber 26 in housing 12 by translational motion of vessel 14 effected by gripping knob 14A with the fingers of the hand llolding the device housing 12. As illustrated, spring 50 biases vessel 14 into a normal position shown in FIG. 2 wherein reservoir 16 communicates with measuring chamber 26. A cover assembly 1~ seals the discharge outlet of the vessel 14.
In the cross sectional view of FIG. 2, dispenser 10 is shown in its upright measuring pOsitioll. Reservoir 16 formed withln vessel 14 has a lower fill passageway 24 extending toward and communlcating with measuring chamber 26 below in housing 12. To fill measuring chamber 26 it is merely necessary to slidably position lower fill passageway 24 over chamber 26 and allow the flowable material in reservoir 16 to be gravity-fed thereto. Adjacent to reservoir 16 in vessel 14 is discharging passageway 2~ for the measured flowable material which extends from the lower portion of vessel 14 to the upper discharging end.
Vessel 14 may be translationally slid relative to housing 12 so that measuring chamber 26 in housing i2 is out of communication with reservoir 16 and in communication with dispensing passageway 2~. As shown in FI~. 3 thc device 10 is thell inverted from its position in FIG. 2 (the key whicll is normally removed is shown in phantom lines) to allow the 1 30~39~
contents of measuring chamber 26 to be dispensed through passageway 2~ and out through discharge opening 31 into a suitable receptacle. The width of tlle lower portion of the wall wllich separates the reservoir lower fill passageway 24 and dispensing passageway 2~ is wide enough ~o prevent the flow of granules from reservoir 16 to passageway 2~ through measuring chamber 26. Accordingly, reservoir 16 is never in communication with dispensing passageway 2~ during any portion of the translational sliding motion between ~easuring and dispensing positions.
The smooth central bore of measuring chamber 26 is formed in the wall of housing extension 36. The outer surface of extension 36 is conventionally threaded and communicates with a piston sleeve 37 connected at its lower end to piston 40. In the preferred embodiment the multiple pitch assembly 36a is a quad thread with one thread removed to provide a single proper angular alignment with sleeve 37, thus rotation of piston sleeve 37 causes movement of piston 40 up and down in chamber 26 (toward and away9 respectively, from vessel 14) to vary the volume of chamber 26. Thus, accurate measurement of flowable material is achieved by filling chamber 26 from reservoir 16, and, while still in the upright position, sliding vessel 14 to the dispensing position whereupon excess flowable material is removed by the lowe`r lip of the wall separating passageways 24 and 2~.
To effect rotation of sleeve piston 37 and adjustn)ent of chamber 26, there is provided in ho~lsillg 12 an adjustmcnt 1 7)o~3qs knob 52. Adjustment knob 52 is rotatable about its longitudinal axis and includes an annular sleeve 49 which slips over and is coaYial with piston sleeve 37. As seen in FIGS. 2 and 6, piston sleeve 37 contains a longitudinally extending tab 3~ on its outer surface whicll slidably mates ~ith corresponding adjustment knob slot 53 along the inner wall of adjustment knob annular sleeve 49. Thus, rotation of adjustment knob 52 effects rotational movement to piston sleeve 37 while allowing sleeve 37 to slide longitudinally. Base cover 5~ snaps over the lower end of housing 12 and limits access to adjustment knob 52 except through a central key opening 57.
To rotate adjustment knob 52, there is provided a key 61 having prongs or teeth 63 which are of a size which permits their insertion through key opening 57 and into engagement with corresponding complementary adjustment knob bosses or teeth 65 to permit rotation of adjustment knob 52; these features are most clearly seen in FIGS. 2 and 5. The size of base cover key opening 57 and the extension of adjustment knob teeth 65 are such that fingers or objects other than key 61 may not be used to adjust knob 52.
To further limit inadvertent adjustment of knob 52, there is provided a "push to turn" feature utilizing key 61.
The lower end of adjustment knob 52 includes a flanged head 56 on which is provided at least one detent tab 55 which may be longitudinally slid into corresponding clctent slots 59 in the base cover to prevcnt rotation of adjustlller)t kno1) 52.
Adjustment knoh 52 is longitudinally slidable witll respect to q ~
6'3592-45 housing 12 on plston sleeve 37 so that ~etent tab 55 rnay be slld upward and out 0~ detent 810t 59 thereby permltting rota-tion of knob 52. A compresslon spring 54 between the upper transverse wall of housing 12 and a shoul~er 51 on ad~ustment knob 52 blases the detent tab 55 lnto engagement with a detent slot 59. Thus, in order to ef~ect rotation of ad~ustment ~nob 52, the key teeth 63 of key 61 must be lnserted into engagement wlth ad~ustment knob 52 and pushed longitudinally inward and upward to disengage the detent tab 55 and slot 59. Key 61 may then be rotated to rotate ad~ustment knob 52.
As seen ln FIG. 5, the houslng 12 base cover 58 is provlded with a base cover opening 67 whlch permits viewlng of graduated lndlcia 62 on the lower face o~ ad~ustment knob head 56. The mlcrometer lndlcla 62 lndicates a dosage level or other lndlcatlon of volume of measurlng chamber 26 whlch has been provided by sultable rotatlon o~ ad~ustment knob 52, plston sleeve 36 and piston 40. Upon pushlng and turnlng key 61 to ad~ust knob 52, the deslred dosage level may be vlewed at the houslng base cover 58.
To facllltate and control dlspenslng of hard partl-cles of granular materlal, the present lnventlon also provldes a cover member 1~3 (FIGS. 1, 2, 3 and 4) over vessel 14 to break the momentum of granular partlcles belng dlspensed into a receptical as devlce 10 ls lnverted. Turnlng to FIGS. 2 and 3, cover 1~ lncludes a dlscharge openlng 31 whlch ls connected to the upper end of dlscharge passageway 28 and a cap 32 whlch ls plvotable about an axls 33 between an opened posltlon (~IG. 3) and a closed posltlon (FIG. 2). An extenslon 3~ on cap 32 ls provlded so that a flnger or, preferably the thumb, e.g., of the hand grasping the devlce 10 may be utlllzed to open cap 32 and allow granular partlcles to be dispensed from discharge openlng 31. A sprlng member 35 ls molded lnto extenslon 34 to t g : 1 ~0~3~
~ 9~92-45 act agalnst ~he lower portion of cover 18 an~ bias cap 32 lnto lts closed posltlon. A sultable seal (not shown) ls provlded between discharge openin~ 31 and cap 32 to prevent contamlna-tion of the discharge passageway 28 an~ other lnterlor contents of dlspenser lO when the cap 15 closed.
As shown ln t,he dlspenslng posltlon ln FIG. 3, the openlng provi~ed by open cap member 3Z ls such that particles falllng from measurlng chamber 26 through dispensing passageway 28 and out of dlscharge opening 31 must lmpact the lnterlor of the cap 32, even if the device 10 is held at some dlspensing angle other than the vertlcal dispensing position as shown ln FIG. 3. ~y providing this ~eature that granular partlcles must impact cap 32 as they fall over the length of discharge passageway 28, the cap 32 ensures that the momentum of the partlcles ls greatly reduced as they are dlspensed onto a spoon or other receptacle. Consequently, the common effect of hard granular particles bouncing out of the spoon or other recep-tacle ls prevented. Preferably, cap 32 will remain closed until all of the ~ranular particles to be dispensed are at the X~
1 30~3~
discharge opening 31 to ensure that particle momentum is as low as possible as the particles are being dispensed.
The momentum-breaking feature of cover assembly l~
has been found to be especially useful in dispensing hard spherical granules of ~.023 inches diameter to 0.~7 inches diameter where the length of the discharge passageway for such granules is substantially equal to or more than 0.5 inches.
As will be apparent to persons skilled in the art, various modifications, adaptations and variations of the foregoing specific disclosure can be made without departing from the spirit and scope of this invention.
Having thus described the invention, what is claimed 1 5 :
.
Claims (8)
1. A flowable material dispenser comprising a housing, variable volume chamber means in the housing for measuring a predetermined amount of the flowable material, outlet means for dispensing measured amounts of the flowable material from the chamber means, key operable means rotatable for varying the volume of the chamber means, the housing supporting the key operable means for linear movement between a locked position and unlocked position, the key operable means in locked position being in interfering relation to the housing for securing the key operable means against rotation relative to the housing, the key operable means in unlocked position being in non-interfering relation to the housing for permitting rotation of the key operable means relative to the housing to vary the volume of the chamber means, and biasing means for urging the key operable means in locked position.
2. The dispenser of claim 1 wherein the interfering relation is effected by one of the housing and key operable means containing a detent tab and the other of the housing and key operable means containing a complementary detent slot for receiving the detent tab in locked position, and wherein the biasing means comprises a spring for urging the detent tab into the detent slot.
3. A flowable material dispenser comprising a housing, variable volume chamber means in the housing for measuring a predetermined amount of flowable material, outlet means for dispensing measured amounts of flowable material from the chamber means, and key operable means rotatable for varying the volume of the chamber means, the housing supporting the key operable means for linear movement between a locked position and unlocked position, the key operable means in locked position being in interference with the housing for restricting rotary movement of the key operable means relative to the housing while permitting said linear movement between said locked and unlocked positions, the key operable means in unlocked position being free to rotate relative to the housing for varying the volume of the chamber means in response to rotation of the key operable means for selectively dispensing a predetermined volume of flowable material from the chamber means.
4. The dispenser of claim 3 wherein the chamber means includes a piston movable by the key operable means in the chamber means to vary its volume.
5. The dispenser of claim 4 wherein the key operable means is supported in the housing for rotation in its unlocked position relative to the housing to move the piston.
6. The dispenser of claim 5 wherein the piston and the housing are complementarily rotationally threaded, and wherein the piston is rotatable along the threads by the key operable means to vary the volume of the chamber means.
7. The dispenser of claim 3 wherein the key operable means includes key-engaging members in recessed relation to an exterior surface of the housing.
8. The dispenser of claim 4 including a driving connection between the key operable means and the piston for moving the piston responsive to rotation of the key operable means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000581710A CA1308398C (en) | 1988-10-31 | 1988-10-31 | Flowable material dispenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000581710A CA1308398C (en) | 1988-10-31 | 1988-10-31 | Flowable material dispenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1308398C true CA1308398C (en) | 1992-10-06 |
Family
ID=4139000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000581710A Expired - Fee Related CA1308398C (en) | 1988-10-31 | 1988-10-31 | Flowable material dispenser |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1308398C (en) |
-
1988
- 1988-10-31 CA CA000581710A patent/CA1308398C/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| MKLA | Lapsed |