Patent US3589677A successfully refreshed from Google Patents.
US3589677A
Expired / Lapsed
US
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Piston valve
Assignee: Individual
•
Filing: 1967-12-11
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Granted: 1971-06-29
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Expires: 1987-12-11
Abstract
Abstract Piston valve, more particularly made of glass and synthetic material, comprising a cylindrical or slightly conical body flaring in the downward direction, provided with arms and in which there is mounted a piston constituted by a rigid core covered with a compressible flexible material, the latter being itself covered with a thin rigid material acting as a lubricant.
Inventors
- 👤 Henri Segers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:33
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/22; F16K3/24; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
Piston valve of glass and synthetic material, comprising a substantially cylindrical hollow glass body provided with arms communicating with said body and arranged oppositely one another, a piston displaceable in said body, said piston constituted of a rigid core covered with a compressible flexible material and a thin rigid cover of replaceable inert material enclosing said compressible flexible material, said thin rigid cover acting as a lubricant, said piston with said rigid cover having a larger diameter than the internal diameter of the valve body, the bottom of said glass body constituting a seat for the piston and being formed as a flat surface with rounded edges, said glass body having oppositely arranged orifices for communicating with said arms, said orifices being of substantially the same diameter as that of said arms.
Claim 2
Dependent Claim
132 words
Piston valve of glass and synthetic material, comprising a substantially cylindrical hollow glass body provided with arms communicating with said body and arranged oppositely one another, a piston displaceable in said body, said piston constituted of a rigid core covered with a compressible flexible material and a thin rigid cover of replaceable inert material enclosing said compressible flexible material, said thin rigid cover acting as a lubricant, said piston with said rigid cover having a larger diameter than the internal diameter of the valve body, the bottom of said glass body constituting a seat for the piston and being formed as a flat surface with rounded edges, said glass body having oppositely arranged orifices for communicating with said arms, said orifices being of substantially the same diameter as that of said arms.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |