Patent US3809507A successfully refreshed from Google Patents.
US3809507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonpulsating fluid-flow pump
Assignee: Individual
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Filing: 1972-03-01
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Granted: 1974-05-07
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Expires: 1992-03-01
Abstract
Abstract A pump incorporating consecutive pairs intercommunicating through channels. One element of the first pair is fixed while the other element of said pair is movable and rigidly connected with one of the elements of the next pair, the other element of which is also movable. The number of such pairs may be more than two. All the movable elements of the pairs of kinematically linked with a shaped cam which sets said elements in motion. The pump is provided with a changeover device for communicating the metering volumes of said pairs.
Inventors
- 👤 B Baglai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:49
CPC Classifications
F; F04; F04B; F04B11/00; F04B43/00; F04B43/08; F04B7/00; F04B7/04; F04B7/06; F04B9/00; F04B9/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
171 words
A nonpulsating fluid-flow pump comprising: first and second consecutive piston-cylinder pairs having metering volumes connected to each other; a liquid inlet channel communicating with at least one of said pairs; channel means communicating the metering volumes of said pairs; one of said pair having a fixed element and a first movable element, said first movable element rigidly connected to one of the elements of the other pistoncylinder pair; said other pair having a second movable element movable relative to said first movable element and adapted to effect a change in the metering volume of said other pair; means communicating the metering volume of said second pair with the metering volume of the first pair, said means forming a channel means selecting device; a flexible pipe communicating the metering volume of said second pair with said inlet channel; profiled cam means kinematically linked with the movable elements of said first and second pairs for moving said elements in a predetermined operative pattern; and a liquId outlet channel connected with the first pair.
Claim 2
Dependent Claim
171 words
A nonpulsating fluid-flow pump comprising: first and second consecutive piston-cylinder pairs having metering volumes connected to each other; a liquid inlet channel communicating with at least one of said pairs; channel means communicating the metering volumes of said pairs; one of said pair having a fixed element and a first movable element, said first movable element rigidly connected to one of the elements of the other pistoncylinder pair; said other pair having a second movable element movable relative to said first movable element and adapted to effect a change in the metering volume of said other pair; means communicating the metering volume of said second pair with the metering volume of the first pair, said means forming a channel means selecting device; a flexible pipe communicating the metering volume of said second pair with said inlet channel; profiled cam means kinematically linked with the movable elements of said first and second pairs for moving said elements in a predetermined operative pattern; and a liquId outlet channel connected with the first pair.
Claim 3
Dependent Claim
70 words
A pump according to claim 1, comprising rod means interconnecting said profiled cam means with each of said movable elements, rocker means having a free end supporting a roller movable over the cam profile surface, said rod means being articulated to said rocker means, said rocker means being provided with a common support, said support being adjustable along said rocker means for changing the ratio of the rocker arm lengths.
Claim 4
Dependent Claim
44 words
A pump according to claim 1, said cam profile surface being asymmetrical so as to have a turning angle corresponding to the discharge stroke of the movable elements of said pairs larger than a turning angle corresponding to the return stroke of said elements.
Claim 5
Dependent Claim
55 words
A pump according to claim 1, comprising a pump casing and two pairs of said piston-cylinders, said channel means selecting device being installed on the pump casing so as to ensure parallel hydraulic communication between the metering volumes of said pairs, one of said metering volumes being in constant communication with said liquid outlet channel.
Claim 6
Dependent Claim
22 words
A pump according to claim 1, comprising flexible elements in the form of bellows effecting the operative function of said piston-cylinder pairs.
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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |