Patent US3818908A successfully refreshed from Google Patents.
US3818908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medicament dispenser
Assignee: Riker Laboratories Inc
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Filing: 1972-08-07
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Granted: 1974-06-25
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Expires: 1992-08-07
Abstract
Abstract A dispenser for dispensing inhalable medicaments which dispenser dispenses the liquid medicaments in a mist by nebulizing a metered amount of the liquid. The liquid is metered by a rotary piston pump and a piston and cylinder arrangement within the dispenser compresses a small amount of air when a release mechanism is triggered to carry the dispensed liquid such that the patients will inhale a mist.
Inventors
- 👤 R Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:19
CPC Classifications
A; A61; A61M; A61M15/00; A61M15/0065; A61M15/009
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
153 words
A dispenser for medicaments such that metered amounts of the medicament will be discharged in a state to be orally received during inhalation, said dispenser comprising: a housing formed with a discharge passageway, a reservoir for a quantity of liquid disposed in said housing, metering pump means having an inlet communicating with said reservoir and an outlet communicating with said passageway for dispensing under pressure metered amounts of liquid from said reservoir, operator means for operating said metering pump means to dispense said liquid from said outlet under pressure, air compressing means within said housing for placing a volume of air under pressure and for directing said air under pressure toward said outlet, and mechanical actuating means for actuating said operator means and said air compressing means whereby a metered amount of liquid is dispensed from said outlet and struck by said compressed air to be discharged with said air as a spray.
Claim 2
Dependent Claim
153 words
A dispenser for medicaments such that metered amounts of the medicament will be discharged in a state to be orally received during inhalation, said dispenser comprising: a housing formed with a discharge passageway, a reservoir for a quantity of liquid disposed in said housing, metering pump means having an inlet communicating with said reservoir and an outlet communicating with said passageway for dispensing under pressure metered amounts of liquid from said reservoir, operator means for operating said metering pump means to dispense said liquid from said outlet under pressure, air compressing means within said housing for placing a volume of air under pressure and for directing said air under pressure toward said outlet, and mechanical actuating means for actuating said operator means and said air compressing means whereby a metered amount of liquid is dispensed from said outlet and struck by said compressed air to be discharged with said air as a spray.
Claim 3
Dependent Claim
34 words
A dispenser according to claim 1 comprising resettable release means connected between said housing and said air compressing means for releasing said mechanical actuating means upon an operator applying pressure to said release means.
Claim 4
Dependent Claim
49 words
A dispenser according to claim 1 wherein said air compressing means comprises: a hollow cylinder and a mating piston member, said cylinder and piston member being interfitted within said housing and mounted for relative movement, and a passageway leading from within said cylinder to a position adjacent said outlet.
Claim 5
Dependent Claim
87 words
A dispenser according to claim 3 wherein said mechanical actuating means comprises a helical compression spring disposed about the outer surface of said cylinder, said cylinder having a first position relative to said piston member wherein said compression spring is under compression and in which first position said cylinder is retained by said release means, and a second position relative to said piston wherein air has been driven from said cylinder by said spring compression being dissipated, and said operator means has actuated said metering pump means.
Claim 6
Dependent Claim
87 words
A dispenser according to claim 4 wherein said metering pump means is a rotary piston pump comprising means defining a cylindrical bore, a piston slidably received in said bore, spring means urging said piston out of said bore, passage means communicating with said bore to define said inlet and outlet and seal means on said piston for connecting the bore in fluid flow communication with said reservoir when said cylinder is in said first position and with said outlet when said cylinder is in said second position.
Claim 7
Dependent Claim
80 words
A dispenser according to claim 4 wherein resettable release means are provided for releasing said mechanical actuating means and comprises: detent means supported by said cylinder, shoulder means on said housing engageable by said detent means to hold said cylinder in said first position, and manually actuatable means for compressing said compression spring with said cylinder in said first position and for unlocking said detent means and said shoulder means to allow movement of said cylinder to said second position.
Claim 8
Dependent Claim
73 words
A dispenser according to claim 1 wherein said metering pump means is a rotary piston pump comprising means defining a cylindrical bore, a piston slidably received in said bore, seal means on said piston connecting said bore with said inlet and then with said outlet upon operation of said actuating means, spring means urging said piston out of said bore, and passage means communicaTing with said bore to define said inlet and outlet.
Claim 9
Dependent Claim
101 words
A dispenser for an inhalation medicament comprising a tubular housing having a laterally projecting mouthpiece, a supply canister of medicament within said housing, means for metering a quantity of medicament for discharge upon actuation of an actuator on said dispenser, wherein the improvement comprises: a rotary piston pump means for discharging a predetermined quantity of medicament from said canister and discharging the same from an outlet under pressure, and means within said housing for providing a quantity of compressed air directed at said outlet and into said mouthpiece to carry said discharged medicament into said mouthpiece upon actuation of said actuator.
Claim 10
Dependent Claim
101 words
A dispenser for an inhalation medicament comprising a tubular housing having a laterally projecting mouthpiece, a supply canister of medicament within said housing, means for metering a quantity of medicament for discharge upon actuation of an actuator on said dispenser, wherein the improvement comprises: a rotary piston pump means for discharging a predetermined quantity of medicament from said canister and discharging the same from an outlet under pressure, and means within said housing for providing a quantity of compressed air directed at said outlet and into said mouthpiece to carry said discharged medicament into said mouthpiece upon actuation of said actuator.
Claim 11
Dependent Claim
105 words
A dispenser according to claim 8 wherein said canister comprises: a cylindrical shaped body member having an axially extending bore extending therethrough and a second bore forming a reservoir, said second bore extending toward one end, said body having a third bore extending generally diametrically and having passageways connecting said third bore to said reservoir and to said one end, and said rotary piston pump means includes a piston slidably fitted in said third bore, said piston having means affording selective communication of said third bore with said reservoir and said one end, and a spring positioned about said piston urging it from said bore.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |