US3680832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure device for streaming media, in particular high pressure liquids
Assignee: Nikex Nehezipari Kulkereskedelmi Vallalat
•
Filing: 1970-03-16
•
Granted: 1972-08-01
•
Expires: 1990-03-16
Abstract
Abstract It is known to construct a closure means for high pressure fluids in such a way that the forces acting on it compensate each other. According to the invention such a closure means is improved in such a way that it can be removed from the path of the closure means, in order to allow a free streaming of the fluid. For this purpose the closure means is either moved in the interior of the casing, or it surrounds the casing like a sleeve.
Inventors
- 👤 Sandor Uliczky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:56
CPC Classifications
F; F16; F16K; F16K39/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
A closure device, in particular for high pressure streaming media, comprising a casing, a piston mounted for sliding movement in the casing between open and closed positions in which the piston respectively opens and closes the casing to the flow of a said medium therethrough, the piston having a relatively small diameter cylindrical forward portion and a relatively large diameter rear portion, a pair of packing rings in the casing into which the relatively small diameter portion of the piston is slidable and one of which seals with the piston only in said closed position and the other of which seals with the piston in both of said positions of the piston, a third packing ring with which the relatively large diameter portion of the piston seals in both of said positions of the piston, and means to equalize the pressure on opposite sides of the piston.
Claim 2
Dependent Claim
147 words
A closure device, in particular for high pressure streaming media, comprising a casing, a piston mounted for sliding movement in the casing between open and closed positions in which the piston respectively opens and closes the casing to the flow of a said medium therethrough, the piston having a relatively small diameter cylindrical forward portion and a relatively large diameter rear portion, a pair of packing rings in the casing into which the relatively small diameter portion of the piston is slidable and one of which seals with the piston only in said closed position and the other of which seals with the piston in both of said positions of the piston, a third packing ring with which the relatively large diameter portion of the piston seals in both of said positions of the piston, and means to equalize the pressure on opposite sides of the piston.
Claim 3
Dependent Claim
31 words
A device as claimed in claim 1, said piston having a rod that extends through the casing and that is connected to said relatively large diameter rear portion of the piston.
Claim 4
Dependent Claim
34 words
A device as claimed in claim 1, and a tube through which said medium flows into the casing, said piston surrounding said tube, said third packing ring sealing between the piston and the tube.
References Cited (Backward Citations)
CH154597A
Cited
US2505410A
Cited
US2854018A
Cited
US3010695A
Cited
US3189048A
Cited
US3485263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |