US3707991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote controlled valve for irrigation systems
Assignee: Individual
•
Filing: 1971-04-12
•
Granted: 1973-01-02
•
Expires: 1991-04-12
Abstract
Abstract A rotatable valve member of Delrin plastic material is coaxially positioned in the main housing portion of a housing of Delrin plastic material and is adapted to be rotated about its axis to connect an inlet port to each of a plurality of outlet ports in a selected sequence.
Inventors
- 👤 J Shapiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:31
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/072; F16K11/076; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/86574; Y10T137/86638
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A valve as claimed in claim 1, wherein each of the main housing portion and the cover portion of the housing comprises plastic material.
Claim 2
Dependent Claim
23 words
A valve as claimed in claim 1, wherein each of the main housing portion and the cover portion of the housing comprises Delrin.
Claim 3
Dependent Claim
58 words
A valve as claimed in claim 1, further comprising a drain port at the peripheral surface of the main housing portion of the housing and an exhaust conduit formed in the main housing portion and extending substantially perpendicularly to the axis of the housing from the recess formed therein to the peripheral surface thereof at the drain port.
Claim 4
Dependent Claim
83 words
A valve as claimed in claim 1, wherein the cylindrical part of the valve member has an annular notch coaxially formed in the bottom surface thereof, and further comprising a sealing Teflon O-ring in the notch and a sealing rubber O-ring coaxially positioned in the notch and in juxtaposition with the Teflon O-ring for resiliently holding the Teflon O-ring in position and for providing a tight seal around the conduit opening at the bottom surface of the cylindrical part of the valve member.
References Cited (Backward Citations)
US3008490A
Cited
GB928299A
Cited
US3319655A
Cited
US3288432A
Cited
US3610285A
Cited
US3618637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |