US3732724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operational viscosimeter
Assignee: Individual
•
Filing: 1971-02-01
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Granted: 1973-05-15
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Expires: 1991-02-01
Abstract
Abstract A viscosimeter of the type employed for measuring the viscosity of dough, semi-liquid artificial resins, paints, lubricating oils and lacquers is disclosed. The viscosimeter includes a chamber capable of being sealed to retain fluid under pressure. A drive shaft extends through an opening in one wall of the chamber. The shaft is bent at an acute angle at a distance spaced inwardly from the wall of the chamber. A tubular extension connects the shaft with a ball or paddle, or other measuring surface, which is rotated by the shaft. A flexible sleeve of substantially the same diameter as the tube extends between the end of the tube and the interior surface of the wall surrounding the shaft, thereby forming an effective rotary seal.
Inventors
- 👤 W Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:15
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/10; G01N11/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
A viscosimeter comprising chamber means having a wall, a rotary shaft extending through said wall, bearing means on said wall supporting such shaft for rotation about an axis, a portion of said shaFt in said chamber means being inclined relative to said axis, measuring surface means mounted on said shaft at a greater distance from said wall than said inclined portion is spaced from said wall, and seal means extending between said wall and said measuring surface means, said seal means including a flexible hollow body secured to the interior of said wall around said shaft, said seal means also including a rigid tube surrounding said shaft, said flexible hollow body being secured to said rigid tube and extending continuously between said rigid tube and said wall, said body and said tube having substantially the same external diameter, whereby the interior of said chamber means may be pressurized without causing leakage of fluid around said shaft.
Claim 2
Dependent Claim
156 words
A viscosimeter comprising chamber means having a wall, a rotary shaft extending through said wall, bearing means on said wall supporting such shaft for rotation about an axis, a portion of said shaFt in said chamber means being inclined relative to said axis, measuring surface means mounted on said shaft at a greater distance from said wall than said inclined portion is spaced from said wall, and seal means extending between said wall and said measuring surface means, said seal means including a flexible hollow body secured to the interior of said wall around said shaft, said seal means also including a rigid tube surrounding said shaft, said flexible hollow body being secured to said rigid tube and extending continuously between said rigid tube and said wall, said body and said tube having substantially the same external diameter, whereby the interior of said chamber means may be pressurized without causing leakage of fluid around said shaft.
Claim 3
Dependent Claim
23 words
A viscosimeter according to claim 1 including bearing means within said hollow body allowing rotation of said shaft relative to said hollow body.
Claim 4
Dependent Claim
23 words
A viscosimeter according to claim 1 including bearing means within said rigid tube allowing rotation of said shaft relative to said rigid tube.
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |