US3729032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid dispenser and method and apparatus for filling same
Assignee: MPL Inc
•
Filing: 1971-12-06
•
Granted: 1973-04-24
•
Expires: 1991-12-06
Abstract
Abstract A liquid dispenser having a liquid containment barrel or body with a slidable sealing and dispensing-effecting plunger, the plunger having a self-sealing slit formed therein to enable filling therethrough of the dispenser barrel, the slit being formed at the bottom forwardly facing end of a threaded handleconnecting recess in the exposed rear portion of the plunger. A male fill member is employed, to be selectively inserted into and releasably open the plunger slit and to selectively fill the barrel with liquid, while venting past the male fill member through a vent eye formed in the opened slit as a result of insertion of the male fill member. An annular ring and grove on the rear end plunger and a lip shoulder stop on the rear end of the syringe barrel or body enable desired forward motion inhibiting action on the plunger during insertion and removal of the male fill member relative to the plunger slit.
Inventors
- 👤 E Tischlinger
- 👤 B Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:42
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/1782
Claims Analysis
Total Claims: 65
Claim 1
Independent Claim
189 words
A fillable liquid dispensing arrangement, comprising a barrel having a liquid-holding chamber with a forward port end for dispensing of liquid therethrough, said barrel having a rear end opening with a radially inwardly extending lip stop, and having a sealing plunger of elastic material and movably disposed therein at the rear end of said barrel and slidable in and along said chamber, said plunger having a lip-engageable external surface protrusion thereon adjacent its rear end, and also having means for connecting a handle, said plunger initially extending partially into said barrel through said rear end opening and extending partially rearwardly beyond said rear end opening, said lip-engageable protrusion being disposed rearwardly of and adjacent said lip, to inhibit, but not prohibit, forward motion of said plunger within said rear end opening, an openable pre-formed slit in said plunger and resiliently biased to a closed condition for enabling filling of said chamber with liquid from an external source and subsequent self-closure of said slit, said plunger and its said slit being engageable through said rear end opening for filling therethrough and for externally manually controlled sliding motion of said plunger.
Claim 2
Dependent Claim
189 words
A fillable liquid dispensing arrangement, comprising a barrel having a liquid-holding chamber with a forward port end for dispensing of liquid therethrough, said barrel having a rear end opening with a radially inwardly extending lip stop, and having a sealing plunger of elastic material and movably disposed therein at the rear end of said barrel and slidable in and along said chamber, said plunger having a lip-engageable external surface protrusion thereon adjacent its rear end, and also having means for connecting a handle, said plunger initially extending partially into said barrel through said rear end opening and extending partially rearwardly beyond said rear end opening, said lip-engageable protrusion being disposed rearwardly of and adjacent said lip, to inhibit, but not prohibit, forward motion of said plunger within said rear end opening, an openable pre-formed slit in said plunger and resiliently biased to a closed condition for enabling filling of said chamber with liquid from an external source and subsequent self-closure of said slit, said plunger and its said slit being engageable through said rear end opening for filling therethrough and for externally manually controlled sliding motion of said plunger.
Claim 3
Dependent Claim
39 words
A liquid dispensing arrangement according to claim 1, said plunger having a threaded external recess formed therein for threadedly connecting a manipulable handle thereto, said slit being formed in a forward wall defining a forward extent of said recess.
Claim 4
Dependent Claim
21 words
A liquid dispensing arrangement according to claim 2, said plunger being formed of elastic material in the zone of said slit.
Claim 5
Dependent Claim
18 words
A liquid dispensing arrangement according to claim 3, said plunger being an integral molded unit of elastic material.
Claim 6
Dependent Claim
14 words
A liquid dispensing arrangement according to claim 4, said plunger being formed of rubber.
Claim 7
Dependent Claim
38 words
A liquid dispensing arrangement according to claim 1, said barrel comprising a syringe having a finger grip thereon adjacent said rear end, and having an orifice at its forward end for facilitating dispensing of liquids from said chamber.
Claim 8
Dependent Claim
32 words
A liquid dispensing arrangement according to claim 6, said forward end of said barrel having a reduced diameter connector nose at its forward end, said orifice being formed in said connector nose.
Claim 9
Dependent Claim
38 words
A liquid dispensing arrangement according to claim 6, and a liquid-flow-inhibiting means adjacent the forward port end of said barrel for effectively substantially fully inhibiting liquid flow from said port end during rear end filling through said plunger.
Claim 10
Dependent Claim
26 words
A liquid dispensing arrangement according to claim 8, and a selectively effectively openable closure element forming said liquid-flow-inhibiting means adjacent said forward end of said chamber.
Claim 11
Dependent Claim
15 words
A liquid dispensing arrangement according to claim 9, said closure element comprising a removable cover.
Claim 12
Dependent Claim
15 words
A liquid dispensing arrangement according to claim 9, said closure element comprising a valve seal.
Claim 13
Dependent Claim
17 words
A liquid dispensing arrangement according to claim 11, said closure element comprising a movable by-pass valve seal.
Claim 14
Dependent Claim
65 words
A liquid dispensing arrangement according to claim 9, said closure element being a slidable valve plug formed of elastic material engaging in sliding compressed and sealing relation within a forward end of said barrel, said barrel having a forward enlarged by-pass chamber for selective forward movement of said valve plug thereinto, to enable selected dispensing of liquid from said chamber past said by-pass valve plug.
Claim 15
Dependent Claim
19 words
A liquid dispensing arrangement according to claim 1, said slit extending across the full forward extent of said plunger.
Claim 16
Dependent Claim
25 words
A liquid dispensing arrangement according to claim 1, said slit extending across a portion of and less than the full forward extent of said plunger.
Claim 17
Dependent Claim
19 words
A liquid dispensing arrangement according to claim 1, said slit extending fully through a seal wall of said plunger.
Claim 18
Dependent Claim
61 words
A liquid dispensing arrangement according to claim 1, said slit extending almost fully through a seal wall of said plunger and having a thin easily ruptured connecting web membrane which does not require pointed instrument puncture or piercing to be opened but which may be sheared upon and by stretching of said slit through insertion of said male fill member therein.
Claim 19
Dependent Claim
61 words
A liquid dispensing arrangement according to claim 1, said plunger having an elastic annular sealing ring thereon forming said lip-engageable protrusion, and being radially compressibly movable past said lip stop and engageable in sliding sealing engagement with the wall of said liquid holding chamber for and during forward dispensing motion of said plunger after filling of said chamber through said slit.
Claim 20
Dependent Claim
33 words
A liquid dispensing arrangement according to claim 18, and an annular outer groove formed on said plunger immediately forward of said elastic annular sealing ring and in releasably engagement with said lip stop.
Claim 21
Dependent Claim
15 words
A liquid dispensing arrangement according to claim 19, said lip stop being an annular lip.
Claim 22
Dependent Claim
102 words
A fillable dispenser for fluids, comprising a liquid-containment body having a bore therein and a dual function dispensing-effective and fill-enabling plunger extending only partially within the rear end of said bore and being selectively positively longitudinally movable along said bore to effect dispensing movement of fluid along said bore and from within said body, said plunger having a radially elastically compressible motion inhibiting stop adjacent its rear end and extending rearwardly and radially beyond the effective rear end opening at the rear end of said body, said plunger having a pre-formed self-sealing opening therein for enablement of filling of said liquid-containmeNt body.
Claim 23
Dependent Claim
102 words
A fillable dispenser for fluids, comprising a liquid-containment body having a bore therein and a dual function dispensing-effective and fill-enabling plunger extending only partially within the rear end of said bore and being selectively positively longitudinally movable along said bore to effect dispensing movement of fluid along said bore and from within said body, said plunger having a radially elastically compressible motion inhibiting stop adjacent its rear end and extending rearwardly and radially beyond the effective rear end opening at the rear end of said body, said plunger having a pre-formed self-sealing opening therein for enablement of filling of said liquid-containmeNt body.
Claim 24
Dependent Claim
34 words
A fillable dispenser for fluids according to claim 21, said plunger being a cup-shaped member formed of elastic material and having said opening formed in its bottom wall which extends forwardly in said body.
Claim 25
Dependent Claim
24 words
A fillable dispenser for fluids according to claim 22, said opening being a self-closing slit having elastically deformable laterally interengageable and interfacing lip surfaces.
Claim 26
Dependent Claim
71 words
A fillable dispenser for fluids according to claim 23, said plunger having an elastically compressible annular seal ring forming said motion-inhibiting stop, and an outer annular groove formed on said plunger and disposed forwardly of said seal ring, said groove in motion-inhibiting-aiding engaging relation with a radially inwardly extending portion of said body at and forming a part of the effective rear end opening at the rear end of said body.
Claim 27
Dependent Claim
32 words
A fillable dispenser for fluids according to claim 24, said radially inwardly extending portion of said body comprising an annular lip extending radially inwardly beyond the adjacent wall surface forming said bore.
Claim 28
Dependent Claim
27 words
A fillable dispenser for fluids according to claim 23, said slit extending across the full forward face of said plunger and along a partial rearward extent thereof.
Claim 29
Dependent Claim
22 words
A fillable dispenser for fluids according to claim 23, said slit extending across less than the full forward extent of said plunger.
Claim 30
Dependent Claim
28 words
A fillable dispenser for fluids according to claim 21, said body having an effectively sealed forward end which may be selectively unsealed to enable dispensing of liquid therefrom.
Claim 31
Dependent Claim
49 words
A fillable dispenser for fluids according to claim 28, said body comprising a syringe body member with a cylindrical bore therein and forming the first mentioned said bore, and said bore having a liquid containment section thereof between the forward end of said plunger and said sealed forward end.
Claim 32
Dependent Claim
153 words
Liquid filling and dispensing apparatus, comprising a liquid dispensing barrel having a selectively effectively openable closed dispensing end, a liquid receiving chamber and a slidable plunger for effecting dispensing of liquid from said chamber through said dispensing end, said plunger extending only partially into said barrel preparatory to filling of said barrel, said plunger having a normally closed pre-formed opening therein for selective external fluid communication with said chamber, a transversely outwardly protruding compressible effective motion-inhibiting detent formed on and adjacent the rear end of said plunger and engaging with a rearwardly facing wall on the rear end of said barrel, and a male fill member adapted to be inserted into and open said pre-formed opening and having a liquid flow passageway to enable filling of said chamber with liquid, said pre-formed opening being greater in effective opened cross-sectional peripheral size than the corresponding effective cross-sectional peripheral size of said male fill member.
Claim 33
Dependent Claim
153 words
Liquid filling and dispensing apparatus, comprising a liquid dispensing barrel having a selectively effectively openable closed dispensing end, a liquid receiving chamber and a slidable plunger for effecting dispensing of liquid from said chamber through said dispensing end, said plunger extending only partially into said barrel preparatory to filling of said barrel, said plunger having a normally closed pre-formed opening therein for selective external fluid communication with said chamber, a transversely outwardly protruding compressible effective motion-inhibiting detent formed on and adjacent the rear end of said plunger and engaging with a rearwardly facing wall on the rear end of said barrel, and a male fill member adapted to be inserted into and open said pre-formed opening and having a liquid flow passageway to enable filling of said chamber with liquid, said pre-formed opening being greater in effective opened cross-sectional peripheral size than the corresponding effective cross-sectional peripheral size of said male fill member.
Claim 34
Dependent Claim
30 words
Liquid filling and dispensing apparatus according to claim 30, said plunger being formed of self-recoverable elastic material adjacent and forming its said opening, said opening being a pre-formed self-closing slit.
Claim 35
Dependent Claim
23 words
Liquid filling and dispensing apparatus according to claim 31, said slit extending across the full extent of the forward face of said plunger.
Claim 36
Dependent Claim
22 words
Liquid filling and dispensing apparatus according to claim 31, said slit extending across a portion of the forward face of said plunger.
Claim 37
Dependent Claim
40 words
Liquid filling and dispensing apparatus according to claim 31, said plunger having a screw-in threaded recess in its rear external surface, and said slit being formed in a forward wall of said plunger defining the forward extent of said recess.
Claim 38
Dependent Claim
25 words
Liquid filling and dispensing apparatus according to claim 34, said fill member having a tubular male section engageable in opening relation with said pre-formed slit.
Claim 39
Dependent Claim
44 words
Liquid filling and dispensing appAratus according to claim 35, said fill member having a longitudinally ribbed section extending rearwardly of the forward end of said fill member to assist in maintaining a vent opening along the zone of said threaded recess in said plunger.
Claim 40
Dependent Claim
22 words
Liquid filling and dispensing apparatus according to claim 30, said fill member having connection means enabling connection thereof to a fill cylinder.
Claim 41
Dependent Claim
21 words
Liquid filling and dispensing apparatus according to claim 37, and a fill cylinder adapted to be connected to said fill member.
Claim 42
Dependent Claim
34 words
Liquid filling and dispensing apparatus according to claim 38, said fill cylinder comprising a fill syringe having a Luer nose-end connector, and said fill member having a Luer connector complementary to said nose-end connector.
Claim 43
Dependent Claim
34 words
Liquid filling and dispensing apparatus according to claim 30, said male fill member including a tube section having an outer circumference or periphery less than the effective opened cross-sectional peripheral size of said opening.
Claim 44
Dependent Claim
33 words
Liquid filling and dispensing apparatus according to claim 40, said opening being a slit and being longer than one-half of the effective said outer circumference of periphery of said fill member tube section.
Claim 45
Dependent Claim
18 words
Liquid filling and dispensing apparatus according to claim 41, said tube section having a relatively blunt forward end.
Claim 46
Dependent Claim
20 words
Liquid filling and dispensing apparatus according to claim 41, said slit extending fully through a seal wall of said plunger.
Claim 47
Dependent Claim
70 words
Liquid filling and dispensing apparatus according to claim 41, said slit extending almost fully through a seal wall of said plunger and having a thin relatively easily ruptured connecting web membrane which does not require pointed instrument puncture or piercing to be opened but which may be sheared upon and by stretching thereof through thrusting motion thereagainst in the course of insertion of said male fill member into said slit.
Claim 48
Independent Claim
119 words
The method of filling a syringe body having a liquid-containment chamber with a rearwardly bounding manually operable plunger and a forward dispensing end spaced from the plunger, comprising resiliently engaging an elastically radially compressible rearwardly and radially protruding portion of said plunger with a detent surface at the rear of said body and thereby resiliently elastically inhibiting forward motion of said plunger while opening a pre-formed self-closing valve in said plunger by insertion of a tubular member therein having a bore therethrough, and passing liquid through said bore while enabling air venting from said chamber past said tubular member at other than said bore, thereupon removing said tubular member from said valve and enabling the self-closure of said valve.
Claim 49
Independent Claim
119 words
The method of filling a syringe body having a liquid-containment chamber with a rearwardly bounding manually operable plunger and a forward dispensing end spaced from the plunger, comprising resiliently engaging an elastically radially compressible rearwardly and radially protruding portion of said plunger with a detent surface at the rear of said body and thereby resiliently elastically inhibiting forward motion of said plunger while opening a pre-formed self-closing valve in said plunger by insertion of a tubular member therein having a bore therethrough, and passing liquid through said bore while enabling air venting from said chamber past said tubular member at other than said bore, thereupon removing said tubular member from said valve and enabling the self-closure of said valve.
Claim 50
Dependent Claim
64 words
The method according to claim 45, said valve being a pre-formed slit having opposing elastic lips which are biased into interengagement, and said opening of said valve being effected by insertion of said tubular member through said slit, to form an opening with a vent eye between said tubular member and the lips of said slit, said venting being effected through said vent eye.
Claim 51
Dependent Claim
38 words
The method according to claim 46, and subsequently moving said plunger forwardly to radially compress said radially protruding portion of said plunger and to release said plunger for attachment of a handle thereto and selective liquid-moving motion thereof.
Claim 52
Dependent Claim
31 words
The method according to claim 47, and connecting a handle to said plunger after filling therethrough, for dispensing of said liquid from said liquid-containment chamber and through said forward dispensing end.
Claim 53
Dependent Claim
61 words
The method according to claim 47, said plunger having a rear facing threaded connector section, and said insertion of said tubular member therein being effected by rotating and threadedly engaging said tubular member with said threaded connector to impart relative longitudinal joining motion between said tubular member and said plunger through thE camming effect imparted by said rotation and threaded engagement.
Claim 54
Dependent Claim
22 words
The method according to claim 49, and subsequently connecting a handle to said plunger by threaded engagement with said threaded connector section.
Claim 55
Dependent Claim
24 words
The method according to claim 46, said insertion of said tubular member being effected by axial thrusting of said tubular member through said slit.
Claim 56
Dependent Claim
29 words
The method according to claim 51, and subsequently connecting a handle to said plunger for dispensing of said liquid from said liquid-containment chamber and through said forward dispensing end.
Claim 57
Dependent Claim
133 words
A male fill member for a liquid containment body having an elastic plunger with a screw-threaded recess therein the bottom wall having a slit formed therein, said fill member, comprising a body having a blunt-nosed forward tube section, said body having a laterally extending plunger pusher section disposed rearwardly of the blunt-nosed forward end of said forward tube section, and spacer means having an effective stop shoulder surface facing toward the forward blunt-nosed end of said forward tube section and spaced between said plunger pusher section and said stop shoulder surface and engageable with said plunger bottom wall when said forward tube section is inserted in said slit to space said pusher section rearwardly of the effective rear surface of said plunger, and a longitudinal vent recess extending past said stop shoulder surface.
Claim 58
Dependent Claim
133 words
A male fill member for a liquid containment body having an elastic plunger with a screw-threaded recess therein the bottom wall having a slit formed therein, said fill member, comprising a body having a blunt-nosed forward tube section, said body having a laterally extending plunger pusher section disposed rearwardly of the blunt-nosed forward end of said forward tube section, and spacer means having an effective stop shoulder surface facing toward the forward blunt-nosed end of said forward tube section and spaced between said plunger pusher section and said stop shoulder surface and engageable with said plunger bottom wall when said forward tube section is inserted in said slit to space said pusher section rearwardly of the effective rear surface of said plunger, and a longitudinal vent recess extending past said stop shoulder surface.
Claim 59
Dependent Claim
34 words
A male fill member according to claim 54, said spacer means comprising a plurality of longitudinally ribs formed along an extent of said tube section between said pusher section and said stop shoulder surface.
Claim 60
Dependent Claim
24 words
A male fill member according to claim 54, said body having means thereon for connection thereof to a source of liquid for filling therethrough.
Claim 61
Dependent Claim
58 words
A slidable plunger for a dispenser, comprising a cup-shaped body of elastic material having formed on its longitudinal external surface a plurality of annular sealing rings with an annular groove therebetween, said cup-shaped body having an internal securing section and a forwardly and inwardly tapered internal bottom surface, and a self-sealing slit formed in said conically tapered bottom.
Claim 62
Dependent Claim
58 words
A slidable plunger for a dispenser, comprising a cup-shaped body of elastic material having formed on its longitudinal external surface a plurality of annular sealing rings with an annular groove therebetween, said cup-shaped body having an internal securing section and a forwardly and inwardly tapered internal bottom surface, and a self-sealing slit formed in said conically tapered bottom.
Claim 63
Dependent Claim
16 words
A slidable plunger according to claim 56, said internal securing section comprising a female threaded section.
Claim 64
Dependent Claim
14 words
A slidable plunger according to claim 56, said slit extending fully across said bottom.
Claim 65
Dependent Claim
18 words
A slidable plunger according to claim 58, said slit extending through a portion of said tapered bottom surface.
References Cited (Backward Citations)
US3610297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |