US3900138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medicament dispenser
Assignee: 3M Co
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Filing: 1974-01-02
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Granted: 1975-08-19
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Expires: 1994-01-02
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
- 👤 Robert E Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:35
CPC Classifications
A; A61; A61M; A61M15/00; A61M15/0065; A61M15/009; B; B05; B05B; B05B11/00; B05B11/01; B05B11/10; B05B11/1087
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
A canister for supplying medicament to a dispenser comprising: a cylindrical shaped body member having a first axially extending bore extending toward one end and forming a reservoir, a second bore extending axially through said body member, said body having a third bore with a closed end extending generally diametrically thereto and communicating through axially aligned passageways with said reservoir and with said one end, a piston slidably fitted in said third bore to form a pump, said piston having means affording selective communication of said third bore with said reservoir in a set position and with said one end in an expel position, an axially movable operator having a cam surface positioned in said second bore for moving said piston, a spring positioned about said piston normally urging it from said bore to engage said operator, and a medicament stored in said reservoir.
Claim 2
Dependent Claim
144 words
A canister for supplying medicament to a dispenser comprising: a cylindrical shaped body member having a first axially extending bore extending toward one end and forming a reservoir, a second bore extending axially through said body member, said body having a third bore with a closed end extending generally diametrically thereto and communicating through axially aligned passageways with said reservoir and with said one end, a piston slidably fitted in said third bore to form a pump, said piston having means affording selective communication of said third bore with said reservoir in a set position and with said one end in an expel position, an axially movable operator having a cam surface positioned in said second bore for moving said piston, a spring positioned about said piston normally urging it from said bore to engage said operator, and a medicament stored in said reservoir.
Claim 3
Dependent Claim
46 words
A canister according to claim 1 wherein said piston is provided with an extended end having thereon cam follower means for reciprocating and imparting rotational movement to said piston affording said selectivity in communicating with said reservoir and said one end upon movement of said operator.
Claim 4
Dependent Claim
66 words
A canister according to claim 1 wherein said means affording selective communication of said third bore with said reservoir and said one end comprises an obliquely positioned O-ring positioned about said piston and cam follower means for imparting reciprocation and axial rotation to said piston affording said desired selectivity and to expel metered amounts of said medicament from said one end upon movement of said operator.
References Cited (Backward Citations)
US2898009A
Cited
US3168213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |