Patent US2351457A successfully refreshed from Google Patents.
Patent US3853125A successfully refreshed from Google Patents.
US3853125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable needleless injector
Assignee: Individual
•
Filing: 1973-03-19
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Granted: 1974-12-10
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Expires: 1993-03-19
Abstract
Abstract A needleless hypodermic injector including a medicament containing ampule, a container of pressurized gas and a connection operatively coupling the gas to the ampule to pressurize the medicament for discharge. The ampule includes at least one rigid end wall which is provided with an opening therein which serves as a discharge orifice through which the pressurized medicament is discharged in the form of a high pressure injection stream. The opposite end of the ampule is configured to permit the medicament to be rapidly pressurized by the gas.
Inventors
- 👤 W Clark
- 👤 K Hollenbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:39
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/30; A61M5/20; A61M5/2053; F; F17; F17C; F17C2270/00; F17C2270/07; F17C2270/0736
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
97 words
A needleless hypodermic injector, comprising: an ampule filled with a liquid medicant to be injected and including, a pressurizing end portion for receiving a charge of pressurizing gas, and a rigid discharge end portion for placing directly into contact with the skin where the injection is to be made which has a substantially uniform diameter bore extending therethrough which is dimensioned for needleless injection; a container of pressurized gas; and means for pressurizing said medicant directly with a charge of said pressurizing gas to form a medicant-gas mixture which is expelled through said bore for needleless injection.
Claim 2
Dependent Claim
97 words
A needleless hypodermic injector, comprising: an ampule filled with a liquid medicant to be injected and including, a pressurizing end portion for receiving a charge of pressurizing gas, and a rigid discharge end portion for placing directly into contact with the skin where the injection is to be made which has a substantially uniform diameter bore extending therethrough which is dimensioned for needleless injection; a container of pressurized gas; and means for pressurizing said medicant directly with a charge of said pressurizing gas to form a medicant-gas mixture which is expelled through said bore for needleless injection.
Claim 3
Dependent Claim
36 words
A needleless hypodermic injector in accordance with claim 1 in which said container of pressurized gas includes a puncturable membrane and said pressurizing end portion of said ampule includes a puncturing means for puncturing said membrane.
Claim 4
Dependent Claim
30 words
A needleless hypodermic injector in accordance with claim 2 which further includes a resilient capping means disposed upon said puncturing means for sealing the pressurizing end portion of said ampule.
Claim 5
Dependent Claim
52 words
A needleless hypodermic injector in accordance with claim 3 in which said capping means is configured for engagement by the area of said container immediately surrounding the opening generated upon puncture of said membrane by said puncturing means, said capping means including a puncturable end portion for puncturing by said puncturing means.
Claim 6
Dependent Claim
35 words
A needleless hypodermic injector in accordance with claim 4 in which said capping means is slidable along said puncturing means and forms a sealing contact between said ampule and container during pressurization of said medicant.
Claim 7
Dependent Claim
75 words
A needleless hypodermic injector as recited in claim 1 which further includes an elongated casing forming a chamber having openings at both ends, said ampule being disposed within said chamber with said discharge end portion extending through one of said openings, and said container being slidably disposed within said chamber opposite said pressurizing end portion, and said means for pressurizing said medicant having a cannula affixed to said pressurizing end portion for puncturing said container.
Claim 8
Dependent Claim
32 words
A needleless hypodermic injector in accordance with claim 6 further including a casing cap slidingly disposed over the other of said openings of said casing and in contact with the said container.
Claim 9
Dependent Claim
43 words
A needleless hypodermic injector in accordance with claim 7 further including finger hold means integral connected to said casing whereby squeezing the casing cap with the heel of the hand against said casing with fingers engaging said finger hold means pressurizes said medicant.
Claim 10
Dependent Claim
30 words
A needleless hypodermic injector as recited in claim 1 in which said means for pressurizing includes a valve having a valve element movable between an open and a closed position.
Claim 11
Dependent Claim
30 words
A needleless hypodermic injector in accordance with claim 6 which further includes a capping means engaging the tip of said cannula for sealing the pressurizing end portion of said ampule.
Claim 12
Dependent Claim
52 words
A needleless hypodermic injector in accordance with claim 10 in which said capping means is configured for sliding engagement along the outer surface of said cannula and includes a puncturable end portion for puncturing by the tip of said cannula when said container is moved towards said ampule for pressurizing said medicant.
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |