Patent US4306843A successfully refreshed from Google Patents.
US4306843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic pumps
Assignee: Jidosha Kiki Co Ltd
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Filing: 1979-06-21
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Granted: 1981-12-22
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Expires: 1999-06-21
Abstract
Abstract In an electromagnetic pump wherein a sleeve containing a reciprocating pump is clamped between inlet and outlet fixtures, a cylindrical rubber ring is mounted about the sleeve and compressed by the inlet and outlet fixtures to come into intimate contact against the sleeve thus forming a seal.
Inventors
- 👤 Takatoshi Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:06
CPC Classifications
F; F04; F04B; F04B17/00; F04B17/03; F04B17/04; F04B17/046; F02; F02M; F02M37/00; F02M37/04; F02M37/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
An electromagnetic pump comprising: a non magnetic sleeve containing a plunger; electromagnetic means for reciprocating said plunger in said sleeve; a resilient deformable cylindrical ring disposed on the outer surface of said sleeve, the inner diameter of said ring being substantially equal to the outer diameter of said sleeve, said ring including a projection on its inner surface for holding said sleeve; an inlet fixture having a cylindrical portion for axially receiving one end of said sleeve, inlet valve means coupled to said inlet fixture; an outlet fixture having a cylindrical portion for axially receiving the other end of said sleeve; and outlet valve means coupled to said outlet fixture, said inlet fixture and said outlet fixture including means for axially compressing said cylindrical ring on the outer surface of said sleeve through both ends of said cylindrical portions of said inlet and said outlet fixtures, thereby sealing the joint between said sleeve and said inlet and outlet fixtures.
Claim 2
Dependent Claim
159 words
An electromagnetic pump comprising: a non magnetic sleeve containing a plunger; electromagnetic means for reciprocating said plunger in said sleeve; a resilient deformable cylindrical ring disposed on the outer surface of said sleeve, the inner diameter of said ring being substantially equal to the outer diameter of said sleeve, said ring including a projection on its inner surface for holding said sleeve; an inlet fixture having a cylindrical portion for axially receiving one end of said sleeve, inlet valve means coupled to said inlet fixture; an outlet fixture having a cylindrical portion for axially receiving the other end of said sleeve; and outlet valve means coupled to said outlet fixture, said inlet fixture and said outlet fixture including means for axially compressing said cylindrical ring on the outer surface of said sleeve through both ends of said cylindrical portions of said inlet and said outlet fixtures, thereby sealing the joint between said sleeve and said inlet and outlet fixtures.
Claim 3
Dependent Claim
11 words
The invention according to claim 1 wherein said projection is annular.
Claim 4
Dependent Claim
29 words
The invention of claim 1 wherein the ends of said cylindrical portions of said inlet and said outlet fixture are beveled to improve the sealing function of said ring.
Claim 5
Dependent Claim
21 words
The invention of claim 1 wherein the ends of said ring are beveled to improve the sealing function of said ring.
Claim 6
Dependent Claim
43 words
The invention of claim 1 wherein the ends of said cylindrical portions of said inlet and said outlet fixtures are spaced by a predetermined distance, and wherein the axial length of said ring in the relaxed state is greater than said predetermined distance.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |