Patent FR2254898A1 successfully refreshed from Google Patents.
US3572981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetically sealed pump
Assignee: Greenlee Brothers and Co
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Filing: 1969-07-01
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Granted: 1971-03-30
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Expires: 1989-07-01
Abstract
Abstract A hermetically sealed pump having a pair of rotatable magnetic discs, separated by a nonmagnetic member; one magnetic disc being permanently affixed to a drive shaft of a motor, and the other magnetic disc being affixed to a fluid pumping means.
Inventors
- 👤 Vernon W Pearson
- 👤 Kenneth L Hagemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:59
CPC Classifications
F; F04; F04B; F04B15/00; F04B15/04; F04B1/00; F04B1/04; F04B1/0404; F04B1/0426; F04B1/053; F04B49/00; F04B49/22; F04B49/225; F04B9/00; F04B9/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
In a hermetically sealed pump, comprising: I. a motor means; A. a first magnetic disc connected to the shaft of said motor means; II. a pumping means; A. a second magnetic disc connected to a shaft of said pumping means; B. piston drive means connected to said excentric shaft, said piston drive means comprises: 1. a pair of piston drive oscillating rings; 2. each of said piston drive oscillating rings comprises: a. an annular ring portion, having an axial bore therethrough, to provide for the piston movement; b. a piston advance segment connected on one side of said annular ring portion extendinG perpendicular thereto and parallel to the axis of said axial bore; c. said segment having an arced recess extending outwardly radially from said axial bore and providing two segmented portions; d. a bore extending through said two segmented portions, adapted to receive a piston pin therethrough; 3. a piston connected to said segmented portions, by means of said piston pin; C. inlet and outlet flow means; and III. a nonconducting and nonmagnetic seal interposed between said first and said second magnetic discs.
Claim 2
Dependent Claim
184 words
In a hermetically sealed pump, comprising: I. a motor means; A. a first magnetic disc connected to the shaft of said motor means; II. a pumping means; A. a second magnetic disc connected to a shaft of said pumping means; B. piston drive means connected to said excentric shaft, said piston drive means comprises: 1. a pair of piston drive oscillating rings; 2. each of said piston drive oscillating rings comprises: a. an annular ring portion, having an axial bore therethrough, to provide for the piston movement; b. a piston advance segment connected on one side of said annular ring portion extendinG perpendicular thereto and parallel to the axis of said axial bore; c. said segment having an arced recess extending outwardly radially from said axial bore and providing two segmented portions; d. a bore extending through said two segmented portions, adapted to receive a piston pin therethrough; 3. a piston connected to said segmented portions, by means of said piston pin; C. inlet and outlet flow means; and III. a nonconducting and nonmagnetic seal interposed between said first and said second magnetic discs.
Claim 3
Dependent Claim
85 words
each of said piston drive oscillating rings comprises: a. an annular ring portion, having an axial bore therethrough, to provide for the piston movement; b. a piston advance segment connected on one side of said annular ring portion extendinG perpendicular thereto and parallel to the axis of said axial bore; c. said segment having an arced recess extending outwardly radially from said axial bore and providing two segmented portions; d. a bore extending through said two segmented portions, adapted to receive a piston pin therethrough;
Claim 4
Dependent Claim
85 words
each of said piston drive oscillating rings comprises: a. an annular ring portion, having an axial bore therethrough, to provide for the piston movement; b. a piston advance segment connected on one side of said annular ring portion extendinG perpendicular thereto and parallel to the axis of said axial bore; c. said segment having an arced recess extending outwardly radially from said axial bore and providing two segmented portions; d. a bore extending through said two segmented portions, adapted to receive a piston pin therethrough;
Claim 5
Dependent Claim
35 words
a piston connected to said segmented portions, by means of said piston pin; C. inlet and outlet flow means; and III. a nonconducting and nonmagnetic seal interposed between said first and said second magnetic discs.
Claim 6
Dependent Claim
35 words
a piston connected to said segmented portions, by means of said piston pin; C. inlet and outlet flow means; and III. a nonconducting and nonmagnetic seal interposed between said first and said second magnetic discs.
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |