US4400267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal structure for hydrocyclones
Assignee: Envirotech Pumpsystems Inc
•
Filing: 1981-08-03
•
Granted: 1983-08-23
•
Expires: 2001-08-03
Abstract
Abstract A hydrocyclone is provided with tapered surfaces at the perimeters of the accept head and the lower cone to effect a double taper seal when the head and cone sections are clamped together in assembled condition.
Inventors
- 👤 Donald D. Brose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:27
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
In a hydrocyclone including a lower cone section and an upper head section, each carrying circumferential elements mutually adapted to be pressed together in sealing relationship by reducing the circumference of external circumferential clamp means, wherein both elements are substantially of resinous material, the improvement which comprises configurating one of said elements as an extension with an external surface shaped as a male taper and an internal surface shaped as a female taper terminating at the interior surface of said hydroclone, and providing the other of said elements with an internal surface adapted to mate with said male taper and an internal structure adapted to mate with said female taper, thereby effecting a double taper seal when the two sections are connected by said external clamp means and the circumference of said clamp means is reduced.
Claim 2
Dependent Claim
136 words
In a hydrocyclone including a lower cone section and an upper head section, each carrying circumferential elements mutually adapted to be pressed together in sealing relationship by reducing the circumference of external circumferential clamp means, wherein both elements are substantially of resinous material, the improvement which comprises configurating one of said elements as an extension with an external surface shaped as a male taper and an internal surface shaped as a female taper terminating at the interior surface of said hydroclone, and providing the other of said elements with an internal surface adapted to mate with said male taper and an internal structure adapted to mate with said female taper, thereby effecting a double taper seal when the two sections are connected by said external clamp means and the circumference of said clamp means is reduced.
Claim 3
Dependent Claim
15 words
An improvement according to claim 1 wherein said extension is carried by the head section.
Claim 4
Dependent Claim
15 words
An improvement according to claim 1 wherein both elements are constructed of a polyurethane material.
Claim 5
Dependent Claim
15 words
An improvement according to claim 3 wherein said extension is carried by the head section.
Claim 6
Dependent Claim
23 words
An improvement according to claim 1 wherein the internal diameter of said head section is between about two inches and about twelve inches
Claim 7
Dependent Claim
42 words
An improvement according to claim 1 wherein said head section and lower cone section each carry external flanges in the proximity of said sealing elements, and said sections are urged together by means of an external clamping band adapted to said flanges.
Claim 8
Dependent Claim
15 words
An improvement according to claim 6 wherein said hydrocyclone is constructed substantially of polyurethane material.
Claim 9
Dependent Claim
15 words
An improvement according to claim 7 wherein said extension is carried by the head section.
References Cited (Backward Citations)
US2816658A
Cited
US2953248A
Cited
US3039608A
Cited
US3136723A
Cited
US4053393A
Cited
US4148721A
Cited
US4226707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |