US4952124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medicine injector and method of using same
Assignee: Sharp Corp
•
Filing: 1986-03-24
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Granted: 1990-08-28
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Expires: 2006-03-24
Abstract
Abstract A medicine injector includes a finger pump which comprises an injection tube containing a liquid medicine and a plurality of fingers adapted to move in a specified sequence to compress this tube. The widths of these fingers are effectively varied by simultaneously compressing the tube with specified two or more of these fingers. This has the effect of increasing the amount of liquid which can be ejected out of the tube and to minimize the effects of a backflow.
Inventors
- 👤 Mitsuji Ogami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:46
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/082; Y; Y10; Y10S; Y10S128/00; Y10S128/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
A medicine injector with a finger pump which comprises an ejection tube containing a liquid and a plurality of fingers adapted to move in a specified sequence to compress said tube, said medicine injector comprising a first means for effectively varying the widths of said fingers by simultaneously compressing said tube with specified two or more of said plurality of fingers, and a second means for controlling the amount of liquid ejected out of said tube by said first means.
Claim 2
Dependent Claim
80 words
A medicine injector with a finger pump which comprises an ejection tube containing a liquid and a plurality of fingers adapted to move in a specified sequence to compress said tube, said medicine injector comprising a first means for effectively varying the widths of said fingers by simultaneously compressing said tube with specified two or more of said plurality of fingers, and a second means for controlling the amount of liquid ejected out of said tube by said first means.
Claim 3
Dependent Claim
15 words
The medicine injector of claim 1 wherein said tube is made of an elastic material.
Claim 4
Independent Claim
76 words
A method of operating a medicine injector with a finger pump which comprises an ejection tube containing a liquid and a plurality of fingers adapted to move in a specified sequence to compress said tube, said method comprising the step of effectively varying the widths of said fingers by simultaneously compressing said tube with specified two or more of said plurality of fingers such that the amount of liquid ejected out of said tube is increased.
Claim 5
Independent Claim
76 words
A method of operating a medicine injector with a finger pump which comprises an ejection tube containing a liquid and a plurality of fingers adapted to move in a specified sequence to compress said tube, said method comprising the step of effectively varying the widths of said fingers by simultaneously compressing said tube with specified two or more of said plurality of fingers such that the amount of liquid ejected out of said tube is increased.
Claim 6
Dependent Claim
34 words
The method of claim 3 wherein said finger pump further comprises a plate, finger guides serving to guide the motions of said fingers and a plastic spacer disposed between said tube and said plate.
Claim 7
Dependent Claim
17 words
The method of claim 3 wherein said finger pump further comprises cams serving to move said fingers.
Claim 8
Dependent Claim
20 words
The method of claim 5 further comprising the step of rotating said cams by a motor to move said fingers.
References Cited (Backward Citations)
JPS587253A
Cited
US4482347A
Cited
JPS6059490A
Cited
US4653987A
Cited
US4869646A
Cited
US4867744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |