US4191358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutoff device
Assignee: Luwa Ltd
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Filing: 1978-04-10
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Granted: 1980-03-04
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Expires: 1998-04-10
Abstract
Abstract A shutoff device comprising a substantially tubular-shaped housing within which there is fixed at its ends an elastic hose body. The hose body extends in the lengthwise direction of the housing and forms a closable throughpassage which flow communicates an inlet opening of the housing with its outlet opening. The inner wall of the housing and the hose body bound a substantially ring-shaped pressure compartment into which opens a conduit connection arranged at the housing. The hose body has a number of folds which extend essentially parallel to one another.
Inventors
- 👤 Johann W. Ferri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:22
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/07; F16K7/075
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
A shutoff device comprising: a substantially tubular-shaped housing; said housing having opposed ends; one end of said housing forming an inlet opening and the other end of said housing an outlet opening; said housing having an inner housing wall; an elastic hose body having opposed ends; means for securing the ends of said elastic hose body at the housing; said elastic hose body defining a closable throughflow passage which flow communicates said inlet opening with said outlet opening; said elastic hose body in conjunction with said inner wall of said housing forming a substantially ring-shaped pressure compartment; a conduit connection arranged at said housing and opening into said ring-shaped pressure compartment; said hose body having a number of folds extending essentially in parallelism to one another; and said folds extending transversely with respect to said hose body and being arranged in rows extending in the lengthwise direction thereof.
Claim 2
Dependent Claim
148 words
A shutoff device comprising: a substantially tubular-shaped housing; said housing having opposed ends; one end of said housing forming an inlet opening and the other end of said housing an outlet opening; said housing having an inner housing wall; an elastic hose body having opposed ends; means for securing the ends of said elastic hose body at the housing; said elastic hose body defining a closable throughflow passage which flow communicates said inlet opening with said outlet opening; said elastic hose body in conjunction with said inner wall of said housing forming a substantially ring-shaped pressure compartment; a conduit connection arranged at said housing and opening into said ring-shaped pressure compartment; said hose body having a number of folds extending essentially in parallelism to one another; and said folds extending transversely with respect to said hose body and being arranged in rows extending in the lengthwise direction thereof.
Claim 3
Dependent Claim
47 words
The shutoff device as defined in claim 1, wherein: at least three rows of said folds are distributively arranged at essentially the same spacing from one another about the circumference of said hose body; and a respective longitudinal fold arranged between each two neighboring rows of folds.
Claim 4
Dependent Claim
41 words
The shutoff device as defined in claim 1, wherein: each of said longitudinal folds possesses a hinge-like structure; and said hose body having a smaller material thickness at the region of each of the longitudinal folds than at its remaining regions.
Claim 5
Dependent Claim
21 words
The shutoff device as defined in claim 2, wherein: each of said longitudinal folds comprise substantially point-like depressions arranged in rows.
Claim 6
Dependent Claim
21 words
The shutoff device as defined in claim 2, wherein: each of said longitudinal folds comprise substantially circular-shaped depressions arranged in rows.
Claim 7
Dependent Claim
69 words
The shutoff device as defined in claim 1, wherein: said hose body, in cross-section, is bounded by at least three curved portions; each of said curved portions having a radius of curvature which is greater than its actual spacing from the center of the hose body; and said rows of folds with the folds thereof confronting the center of the hose body being arranged internally of said curved portions.
Claim 8
Dependent Claim
43 words
The shutoff device as defined in claim 1, further including: means defining a core portion extending centrally into said throughflow passage; said core portion defining seating means at its periphery for said hose body; said core portion being formed of a flexible material.
Claim 9
Dependent Claim
51 words
The shutoff device as defined in claim 7, wherein: said core portion comprises a hose which has an open end terminating at the region of said throughflow passage; said hose having a further end remote from said open end; and means for flow communicating said further end with said pressure compartment.
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) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |