US4005725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic closure valve for water sprinkler
Assignee: FUJIKI DENKI KK
•
Filing: 1976-01-06
•
Granted: 1977-02-01
•
Expires: 1996-01-06
Abstract
Abstract An automatic closure valve for water sprinkler which enables water from a water tap to be used without even necessity for stopping the tap and removing the sprinkler and water hose and enables water remaining in the hose and the closure valve to be automatically drained off after the water sprinkling, the closure valve being constructed with a valve casing, in which there are provided two valve chambers defined in mutual contiguity and communicated each other by means of a passage; a closure valve mechanism for closing the passage in response to increased pressure of water in the valve chambers; an opening which communicates the valve chambers and the external atmosphere; and a valve means which usually closes the opening by the water pressure, and opens the same when the pressure in the valve chambers becomes negative.
Inventors
- 👤 Fusamatsu Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:06
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/8593; Y10T137/87169; Y10T137/87233; Y10T137/87241; Y10T137/877; Y10T137/87829; Y10T137/87837; Y10T137/87861; Y10T137/87869
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
198 words
An automatic closure valve for water sprinkler which comprises in combination; a valve casing having inlet and outlet for water supply from a water tap; a connecting means for connecting the water tap with the inlet of said valve casing; another connecting means provided at the outlet of said valve casing; a first valve chamber defined in said valve casing at the inlet side thereof; a second valve chamber defined in said valve casing at the outlet side thereof; a passage defined between said first and second valve chambers and for communicating said both valve chambers; means for closing said communicating passage in response to increase in water pressure in said second valve chamber; an opening or port provided in said valve casing to communicate said valve chamber at the inlet side with the external atmosphere; a communicating tube fitted at said opening; a ball valve provided in said communicating tube and which usually closes said opening under water pressure, and opens said opening when the pressure within said valve chamber becomes negative; an outlet tube fitted to said communicating tube in a manner movable back and forth; and a pushing rod to manually open said ball valve.
Claim 2
Dependent Claim
198 words
An automatic closure valve for water sprinkler which comprises in combination; a valve casing having inlet and outlet for water supply from a water tap; a connecting means for connecting the water tap with the inlet of said valve casing; another connecting means provided at the outlet of said valve casing; a first valve chamber defined in said valve casing at the inlet side thereof; a second valve chamber defined in said valve casing at the outlet side thereof; a passage defined between said first and second valve chambers and for communicating said both valve chambers; means for closing said communicating passage in response to increase in water pressure in said second valve chamber; an opening or port provided in said valve casing to communicate said valve chamber at the inlet side with the external atmosphere; a communicating tube fitted at said opening; a ball valve provided in said communicating tube and which usually closes said opening under water pressure, and opens said opening when the pressure within said valve chamber becomes negative; an outlet tube fitted to said communicating tube in a manner movable back and forth; and a pushing rod to manually open said ball valve.
Claim 3
Dependent Claim
162 words
The automatic closure valve as claimed in claim 1, wherein said means for closing said communicating passage between said first and second valve chambers comprises: a pressure chamber adjacent to said first valve chamber at the inlet side; a diaphragm in said pressure chamber; a spring means attached to said diaphragm to return the same to the original position thereof; a closure valve disposed in said second valve chamber at the outlet side in a slidable manner by a spring force; a valve rod fixed at one end thereof to said closure valve and extending through said communicating passage and said first valve chamber upto said diaphragm in said pressure chamber; and a communicating path provided between said second valve chamber and said pressure chamber to cause pressurized water in said second valve chamber to flow into said pressure chamber to push said diaphragm and to simultaneously cause said closure valve to move following the diaphragm movement to close said communicating passage.
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) | 1980-02-01 | 1980-08-02 | 1981-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-01 | 1984-08-02 | 1985-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-01 | 1988-08-02 | 1989-02-01 | $7700.00 | Window Closed / Lapsed |