US4022245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sight check valve
Assignee: Individual
•
Filing: 1976-04-08
•
Granted: 1977-05-10
•
Expires: 1996-04-08
Abstract
Abstract A swing type check valve is connected by a double compression coupling to an irrigation pipe. The compression sleeve over the valve is transparent so that the valve may be sight checked or visually inspected.
Inventors
- 👤 Leon E. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:56
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; F16K15/031; F16K15/034; F16K15/14; F16K15/144; F16K15/16; F16K37/00; F16K37/0058; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7857; Y10T137/7879; Y10T137/7888; Y10T137/7891; Y10T137/8158; Y10T137/8359
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
191 words
A visual check valve adapted to be connected in a pipe between a. an inlet end of the pipe and b. an outlet end of the pipe; Comprising in combination: c. a valve body having i. an outer cylindrical shell with an outlet and inlet end equal to the diameter of the pipe, ii. an inner flow pipe telescoped within the outer shell, and iii. a filler between the flow pipe and the outlet end of the shell, d. a flap valve having i. a closure over the outlet of the flow pipe, ii. swung from an anchor on the valve body, e. a peripheral body flange extending around the outer shell, f. a transparent sleeve i. of transparent material ii. with a body end and a pipe end, iii. the body end telescoped over the outer shell outlet end, g. a resilient gasket around the outer shell between the transparent sleeve and the body flange, h. outlet jam means for jamming the transparent band against its gasket, and j. an inlet sleeve, and k. inlet means for fluidly sealing the inlet sleeve to the inlet end of the outer shell.
Claim 2
Dependent Claim
191 words
A visual check valve adapted to be connected in a pipe between a. an inlet end of the pipe and b. an outlet end of the pipe; Comprising in combination: c. a valve body having i. an outer cylindrical shell with an outlet and inlet end equal to the diameter of the pipe, ii. an inner flow pipe telescoped within the outer shell, and iii. a filler between the flow pipe and the outlet end of the shell, d. a flap valve having i. a closure over the outlet of the flow pipe, ii. swung from an anchor on the valve body, e. a peripheral body flange extending around the outer shell, f. a transparent sleeve i. of transparent material ii. with a body end and a pipe end, iii. the body end telescoped over the outer shell outlet end, g. a resilient gasket around the outer shell between the transparent sleeve and the body flange, h. outlet jam means for jamming the transparent band against its gasket, and j. an inlet sleeve, and k. inlet means for fluidly sealing the inlet sleeve to the inlet end of the outer shell.
Claim 3
Dependent Claim
46 words
The invention as defined in claim 1 wherein m. said closure is a flexible flap with a reinforcement over the outlet of the flow pipe in the form of a metal disc bolted to said flexible flap having a diameter as large as said flow pipe.
Claim 4
Dependent Claim
21 words
The invention as defined in claim 2 wherein n. said flexible flap is cut from a sheet of reinforced synthetic rubber.
Claim 5
Dependent Claim
40 words
The invention as defined in claim 1 with an additional limitation of m. said outlet of said flow pipe being at an angle to the normal surface of the pipe and the flexible flap attached to the short side thereof.
Claim 6
Dependent Claim
21 words
The invention as defined in claim 1 with an additional limitation of m. said transparent sleeve it flared at each end.
Claim 7
Dependent Claim
67 words
The invention as defined in claim 1 with additional limitations of m. said inlet sleeve telescoped over said inlet end of the outer shell, n. a resilient gasket around the outer shell between the inlet sleeve and the body flange, o. a loose inlet gasket between a loose inlet flange and said inlet sleeve, and p. bolts extending from said body flange to said loose inlet flange.
Claim 8
Dependent Claim
38 words
The invention as defined in claim 1 with additional limitations of m. said inlet sleeve is connected to the inlet end of the pipe, and n. the transparent sleeve is connected to the outlet end of the pipe.
Claim 9
Dependent Claim
31 words
The invention as defined in claim 1 wherein m. said outlet jam means includes bolts extending from said body flange to an outlet loose flange and n. an outlet loose gasket.
Claim 10
Dependent Claim
21 words
The invention as defined in claim 8 with an additional limitation of o. said tranparent sleeve is flared at each end.
Claim 11
Dependent Claim
35 words
The invention as defined in claim 9 wherein p. said inlet sleeve is connected to the inlet end of the pipe, and q. the transparent sleeve is connected to the outlet end of the pipe.
Claim 12
Dependent Claim
80 words
The invention as defined in claim 10 with additional limitations of r. said inlet sleeve is telescoped over said inlet end of the outer shell, s. a resilient gasket around the outer shell between the inlet sleeve and the body flange, t. a loose inlet flange around the inlet end of the pipe, u. a loose inlet gasket between said loose inlet flange and said inlet sleeve, and v. bolts extending from said body flange to said loose inlet flange.
Claim 13
Dependent Claim
46 words
The invention as defined in claim 11 wherein w. said closure is a flexible flap with a reinforcement over the outlet of the flow pipe in the form of a metal disc bolted to said flexible flap having a diameter as large as said flow pipe.
Claim 14
Dependent Claim
21 words
The invention as defined in claim 12 wherein x. said flexible flap is cut from a sheet of reinforced synthetic rubber.
Claim 15
Dependent Claim
40 words
The invention as defined in claim 13 with an additional limitation of y. said outlet of said flow pipe being at an angle to the normal surface of the pipe and the flexible flap attached to the short side thereof.
References Cited (Backward Citations)
US2388432A
Cited
US2867213A
Cited
US3131716A
Cited
GB983796A
Cited
US3279487A
Cited
GB1106369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |