US3744524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible pinch valve for conveying dry materials and slurries
Assignee: Individual
•
Filing: 1970-09-08
•
Granted: 1973-07-10
•
Expires: 1990-09-08
Abstract
Abstract A molded, one piece, generally Y-shaped, flexible, tubular valve body formed of a fabric reinforced elastomer. The valve body is mounted in a housing which also supports a roller type pinching mechanism to open and close the legs of the Y-shaped valve body. A nose portion is formed as part of the valve body at the juncture of the legs of the valve body and moves in the direction of the leg being pinched closed. The nose portion is reinforced by a stiff arcuate shaped insert. The configuration of the valve body and its mounting on the housing permits flexing of the portion of the valve body upstream of the nose portion during opening and closing of the leg portions of the valve body. This construction permits the pinching elements to be positioned close to the juncture of the legs of the Y-shaped valve body, thus reducing the volume of the plug of material that is trapped in the branch leg upon closing thereof.
Inventors
- 👤 R Blau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:12
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/022; F16K11/027; F16K7/00; F16K7/02; F16K7/04; F16K7/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87056; Y10T137/877; Y10T137/87708; Y10T137/87716
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
217 words
A flexible, pinch valve for conveying dry materials and slurries, including: a one piece, generally Y-shaped, tubular flexible valve body formed of an elastomer, said generally Y-shaped tubular body having a straight leg and a branch leg with said branch leg extending from said straight leg and dividing said straight leg into inlet and outlet portions, said outlet portion of said straight leg and said branch leg forming an acute angle with each other, openings in the ends of said legs, pinch roller means associated with the outlet portion of the straight leg and the branch leg to pinch closed one of said legs while simultaneously opening the other of said legs, a housing surrounding said tubular flexible valve body, and pinch roller guides formed in said housing adjacent to the branch leg and the outlet portion of said straight leg, said pinch roller means for pinching closed one of said legs while simultaneously opening the other of said legs including pinch rollers positioned in said guides with said rollers located outwardly of the legs of the generally Y-shaped valve body, an operating shaft positioned between The legs of the valve body, a pinch roller mounted on arms attached to the operating shaft, and links connecting said operating shaft and said pinch rollers positioned in said guides.
Claim 2
Dependent Claim
217 words
A flexible, pinch valve for conveying dry materials and slurries, including: a one piece, generally Y-shaped, tubular flexible valve body formed of an elastomer, said generally Y-shaped tubular body having a straight leg and a branch leg with said branch leg extending from said straight leg and dividing said straight leg into inlet and outlet portions, said outlet portion of said straight leg and said branch leg forming an acute angle with each other, openings in the ends of said legs, pinch roller means associated with the outlet portion of the straight leg and the branch leg to pinch closed one of said legs while simultaneously opening the other of said legs, a housing surrounding said tubular flexible valve body, and pinch roller guides formed in said housing adjacent to the branch leg and the outlet portion of said straight leg, said pinch roller means for pinching closed one of said legs while simultaneously opening the other of said legs including pinch rollers positioned in said guides with said rollers located outwardly of the legs of the generally Y-shaped valve body, an operating shaft positioned between The legs of the valve body, a pinch roller mounted on arms attached to the operating shaft, and links connecting said operating shaft and said pinch rollers positioned in said guides.
Claim 3
Dependent Claim
71 words
The pinch valve of claim 1 further characterized in that: a nose portion is formed in the tubular valve body at the juncture of the branch leg and the outlet portion of the straight leg, said shaft mounted pinch roller is positioned to engage and move said nose portion of said valve body during movement from contact with one leg into contact with the other leg of said Y-shaped valve body.
Claim 4
Dependent Claim
26 words
The valve body of claim 1 further characterized in that said guide positioned pinch rollers extend through loops formed as part of said Y-shaped valve body.
Claim 5
Dependent Claim
155 words
A one piece, generally Y-shaped tubular flexible valve body formed of an elastomer, said generally Y-shaped, tubular body having a straight leg and a branch leg with said branch leg extending from said straight leg and dividing said straight leg into inlet and outlet portions, said outlet portion of said straight leg and said branch leg forming an acute angle with each other, openings in the ends of said legs, a nose portion formed in the tubular valve body at the juncture of the branch leg and the outlet portion of the straight leg, said nose being reinforced by an arcuate shaped insert of a material stiffer than the adjacent portions of the valve body, said nose portion and said tubular flexible valve body being formed and adapted to move in a manner such that when one of the legs is being pinched closed, the nose portion will move in the direction of that leg.
Claim 6
Dependent Claim
155 words
A one piece, generally Y-shaped tubular flexible valve body formed of an elastomer, said generally Y-shaped, tubular body having a straight leg and a branch leg with said branch leg extending from said straight leg and dividing said straight leg into inlet and outlet portions, said outlet portion of said straight leg and said branch leg forming an acute angle with each other, openings in the ends of said legs, a nose portion formed in the tubular valve body at the juncture of the branch leg and the outlet portion of the straight leg, said nose being reinforced by an arcuate shaped insert of a material stiffer than the adjacent portions of the valve body, said nose portion and said tubular flexible valve body being formed and adapted to move in a manner such that when one of the legs is being pinched closed, the nose portion will move in the direction of that leg.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |