Patent US4667700A successfully refreshed from Google Patents.
US4667700A
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Apparatus for throttling flow limitation in water fittings
Assignee: Hansgrohe SE
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Filing: 1985-11-19
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Granted: 1987-05-26
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Expires: 2005-11-19
Abstract
Abstract This apparatus is particularly suitable for sanitary fittings. It has a throttling insert (1) made from an elastic material and which bears against an annular shoulder (7). This throttling insert (1) is provided with a central flow opening (2) and is symmetrical to a plane normal to the flowpath. The flow opening (2) is provided with an annular regulating lip (5) on both the inflow and the outflow sides, the inflow side regulating lip increasing or decreasing the entry cross-section of the flow opening (2) as a function of the particular pressure of the water flowing through.
Inventors
- 👤 Guenter Buzzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:53
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; G05D7/012; F; F16; F16K; F16K17/00; F16K17/20; F16K17/34; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
126 words
An apparatus for throttling flow in water fittings comprising: a throttling insert made from an elastic material and which bears against an annular shoulder, the insert having a flow opening to a flow channel bounded on an inflow side and on an outflow side by a pair of annular regulating lips, the regulating lip on the inflow-side deforming to increase and decrease a cross-section of the flow opening as a function of pressure of water floing through the flow channel the opening diverging along the flow path from the lip on the inlet side and converging along the flow path toward the lip on the outlet side, the throttling insert being symmetrical around a plane between the inflow and outflow sides, normal to the flow channel.
Claim 2
Independent Claim
126 words
An apparatus for throttling flow in water fittings comprising: a throttling insert made from an elastic material and which bears against an annular shoulder, the insert having a flow opening to a flow channel bounded on an inflow side and on an outflow side by a pair of annular regulating lips, the regulating lip on the inflow-side deforming to increase and decrease a cross-section of the flow opening as a function of pressure of water floing through the flow channel the opening diverging along the flow path from the lip on the inlet side and converging along the flow path toward the lip on the outlet side, the throttling insert being symmetrical around a plane between the inflow and outflow sides, normal to the flow channel.
Claim 3
Dependent Claim
37 words
An apparatus according to claim 1, wherein the flow channel defined by the throttling insert has an increasing internal diameter leading to the plane from the inflow side and leading to the plane from the outflow side.
Claim 4
Dependent Claim
24 words
An apparatus according to claim 2, wherein the flow channel is defined by a curved wall of the insert as viewed in longitudinal section.
Claim 5
Dependent Claim
19 words
An apparatus according to claim 2, wherein the flow channel defines opposite linear cones as viewed in longitudinal section.
Claim 6
Dependent Claim
27 words
An apparatus according to claim 4, wherein the throttling insert is substantially annular and has on both end faces an annular slot concentric to the flow channel.
Claim 7
Dependent Claim
42 words
An apparatus according to claim 5, wherein areas of the throttling insert forming transitions from the annular slots to the flow channel have a cross section in each case substantially corresponding to a wedge with a wedge angle of 35° to 50°.
Claim 8
Dependent Claim
31 words
An apparatus according to claim 1, wherein outside surfaces of the regulating lips toward the inlet side and toward the outlet side each define a circumferential surface of a truncated cone.
Claim 9
Dependent Claim
18 words
An apparatus according to claim 7, wherein the truncated cone extends into the bottom of the annular slot.
Claim 10
Dependent Claim
33 words
An apparatus according to claim 1, wherein a flow-facing side of the regulating lips in each case slopes by approximately 20° to 40° out of a cross-sectional plane counter to a flow direction.
Claim 11
Dependent Claim
26 words
An apparatus according to claim 1, further comprising a thrust ring associated with the throttling insert and operable to support the insert on the outflow side.
Claim 12
Dependent Claim
15 words
An apparatus according to claim 10, wherein the thrust ring radially supports the throttling insert.
Claim 13
Dependent Claim
33 words
An apparatus according to claim 10, wherein the thrust ring has a bearing shoulder profiled to substantially correspond to a groove on the outflow-side of the throttling insert and projects into the groove.
Claim 14
Dependent Claim
36 words
An apparatus according to claim 12, wherein the thrust ring and the insert are shaped such that when there is no flow, the bearing shoulder leaves a wedge-like part of the outflow-side regulating lip substantially unsupported.
Claim 15
Dependent Claim
20 words
An apparatus according to claim 10, wherein on the outflow-side, the thrust ring has at least one flow guidance member.
Claim 16
Dependent Claim
16 words
An apparatus according to claim 14, wherein the flow guidance member is a perforated base plate.
Claim 17
Dependent Claim
18 words
An apparatus according to claim 14, wherein the flow guidance member has a through-flow channel widening in steps.
Claim 18
Dependent Claim
32 words
An apparatus according to claim 10, wherein the throttling insert and the thrust ring associated therewith form a compact unit, which unit can be inserted into a fitting to limit flow therein.
Claim 19
Independent Claim
89 words
An apparatus for throttling flow in water fittings, comprising: a throttling insert made from an elastic material, the insert having a through opening for water flow, the opening having a continuously concave shape and defining two lips at an inlet side and an outlet side thereof, the opening diverging along the flow path from a lip on an inlet side and converging along the flow path toward a lip on an outlet side, the inlet side lip being deformable to restrict the flow opening in response to water pressure.
Claim 20
Independent Claim
89 words
An apparatus for throttling flow in water fittings, comprising: a throttling insert made from an elastic material, the insert having a through opening for water flow, the opening having a continuously concave shape and defining two lips at an inlet side and an outlet side thereof, the opening diverging along the flow path from a lip on an inlet side and converging along the flow path toward a lip on an outlet side, the inlet side lip being deformable to restrict the flow opening in response to water pressure.
Claim 21
Dependent Claim
23 words
The apparatus of claim 18, further comprising a thrust ring having an annular bearing shoulder supporting a part of the outlet side lip.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |