Patent US5205539A successfully refreshed from Google Patents.
US5205539A
Expired / Lapsed
US
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Diaphragm valve
Assignee: Georg Fischer Rohrleitungssysteme AG
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Filing: 1992-06-03
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Granted: 1993-04-27
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Expires: 2012-06-03
Abstract
Abstract A diaphragm valve is described which comprises a lower housing portion and a upper housing portion which are clamped together by a fastening device. An elastomeric diaphragm is located between the lower housing portion and the upper housing portion. A compression spring is arranged between either the lower housing portion or the upper housing portion and an element of the fastening device.
Inventors
- 👤 Adelbert Schalk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:54
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/12; F16K27/00; F16K27/02; F16K27/0236
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
125 words
A diaphragm valve which comprises: a lower housing portion which is constructed of a plastic material and which further comprises a passage channel for passage of a medium; an upper housing portion which is constructed of a plastic material; a diaphragm wherein said diaphragm is located between said lower housing portion and said upper housing portion; a fastening device for connecting said lower housing portion to said upper housing portion; and a compression spring which is pre-stressed and which is further arranged adjacent to each fastening device; wherein said lower housing portion and said upper housing portion are clamped together by said fastening device with a pre-determined force and further wherein said diaphragm is supported between said lower housing portion and said upper housing portion.
Claim 2
Dependent Claim
125 words
A diaphragm valve which comprises: a lower housing portion which is constructed of a plastic material and which further comprises a passage channel for passage of a medium; an upper housing portion which is constructed of a plastic material; a diaphragm wherein said diaphragm is located between said lower housing portion and said upper housing portion; a fastening device for connecting said lower housing portion to said upper housing portion; and a compression spring which is pre-stressed and which is further arranged adjacent to each fastening device; wherein said lower housing portion and said upper housing portion are clamped together by said fastening device with a pre-determined force and further wherein said diaphragm is supported between said lower housing portion and said upper housing portion.
Claim 3
Dependent Claim
14 words
The diaphragm valve of claim 1,wherein said compression spring is a spiral compression spring.
Claim 4
Dependent Claim
21 words
The diaphragm valve of claim 2, wherein said compression spring is characterized by a rectangular winding cross-section and a spring constant.
Claim 5
Dependent Claim
54 words
The diaphragm valve of claim 1, wherein said compression spring is further characterized by a spring force which increases by a maximum of 20% in response to the elongation of said lower housing portion and said upper housing portion upon the increase in temperature of the medium through a temperature difference of 100° C.
Claim 6
Dependent Claim
54 words
The diaphragm valve of claim 2, wherein said compression spring is further characterized by a spring force which increases by a maximum of 20% in response to the elongation of said lower housing portion and said upper housing portion upon the increase in temperature of the medium through a temperature difference of 100° C.
Claim 7
Dependent Claim
54 words
The diaphragm valve of claim 3, wherein said compression spring is further characterized by a spring force which increases by a maximum of 20% in response to the elongation of said lower housing portion and said upper housing portion upon the increase in temperature of the medium through a temperature difference of 100° C.
Claim 8
Dependent Claim
17 words
The diaphragm valve of claim 1, wherein said compression spring is fabricated from a chromium silicon steel.
Claim 9
Dependent Claim
17 words
The diaphragm valve of claim 2, wherein said compression spring is fabricated from a chromium silicon steel.
Claim 10
Dependent Claim
17 words
The diaphragm valve of claim 3, wherein said compression spring is fabricated from a chromium silicon steel.
Claim 11
Dependent Claim
17 words
The diaphragm valve of claim 4, wherein said compression spring is fabricated from a chromium silicon steel.
Claim 12
Dependent Claim
17 words
The diaphragm valve of claim 5, wherein said compression spring is fabricated from a chromium silicon steel.
Claim 13
Dependent Claim
17 words
The diaphragm valve of claim 6, wherein said compression spring is fabricated from a chromium silicon steel.
Claim 14
Dependent Claim
86 words
The diaphragm valve of claim 1, wherein said fastening device comprises: a threaded bolt which is tightly screwed with one end into one of said lower housing portion and said upper housing portion; and a nut which is fastened to said threaded bolt at the end of said threaded bolt opposite the one of said lower housing portion and said upper housing portion; and further wherein said compression spring is located between said nut and one of said lower housing portion and said upper housing portion.
Claim 15
Dependent Claim
86 words
The diaphragm valve of claim 2, wherein said fastening device comprises: a threaded bolt which is tightly screwed with one end into one of said lower housing portion and said upper housing portion; and a nut which is fastened to said threaded bolt at the end of said threaded bolt opposite the one of said lower housing portion and said upper housing portion; and further wherein said compression spring is located between said nut and one of said lower housing portion and said upper housing portion.
Claim 16
Dependent Claim
86 words
The diaphragm valve of claim 3, wherein said fastening device comprises: a threaded bolt which is tightly screwed with one end into one of said lower housing portion and said upper housing portion; and a nut which is fastened to said threaded bolt at the end of said threaded bolt opposite the one of said lower housing portion and said upper housing portion; and further wherein said compression spring is located between said nut and one of said lower housing portion and said upper housing portion.
Claim 17
Dependent Claim
86 words
The diaphragm valve of claim 4, wherein said fastening device comprises: a threaded bolt which is tightly screwed with one end into one of said lower housing portion and said upper housing portion; and a nut which is fastened to said threaded bolt at the end of said threaded bolt opposite the one of said lower housing portion and said upper housing portion; and further wherein said compression spring is located between said nut and one of said lower housing portion and said upper housing portion.
Claim 18
Dependent Claim
86 words
The diaphragm valve of claim 5, wherein said fastening device comprises: a threaded bolt which is tightly screwed with one end into one of said lower housing portion and said upper housing portion; and a nut which is fastened to said threaded bolt at the end of said threaded bolt opposite the one of said lower housing portion and said upper housing portion; and further wherein said compression spring is located between said nut and one of said lower housing portion and said upper housing portion.
Claim 19
Dependent Claim
86 words
The diaphragm valve of claim 6, wherein said fastening device comprises: a threaded bolt which is tightly screwed with one end into one of said lower housing portion and said upper housing portion; and a nut which is fastened to said threaded bolt at the end of said threaded bolt opposite the one of said lower housing portion and said upper housing portion; and further wherein said compression spring is located between said nut and one of said lower housing portion and said upper housing portion.
Claim 20
Dependent Claim
86 words
The diaphragm valve of claim 7, wherein said fastening device comprises: a threaded bolt which is tightly screwed with one end into one of said lower housing portion and said upper housing portion; and a nut which is fastened to said threaded bolt at the end of said threaded bolt opposite the one of said lower housing portion and said upper housing portion; and further wherein said compression spring is located between said nut and one of said lower housing portion and said upper housing portion.
Claim 21
Dependent Claim
86 words
The diaphragm valve of claim 8, wherein said fastening device comprises: a threaded bolt which is tightly screwed with one end into one of said lower housing portion and said upper housing portion; and a nut which is fastened to said threaded bolt at the end of said threaded bolt opposite the one of said lower housing portion and said upper housing portion; and further wherein said compression spring is located between said nut and one of said lower housing portion and said upper housing portion.
Claim 22
Dependent Claim
86 words
The diaphragm valve of claim 9, wherein said fastening device comprises: a threaded bolt which is tightly screwed with one end into one of said lower housing portion and said upper housing portion; and a nut which is fastened to said threaded bolt at the end of said threaded bolt opposite the one of said lower housing portion and said upper housing portion; and further wherein said compression spring is located between said nut and one of said lower housing portion and said upper housing portion.
Claim 23
Dependent Claim
86 words
The diaphragm valve of claim 10, wherein said fastening device comprises: a threaded bolt which is tightly screwed with one end into one of said lower housing portion and said upper housing portion; and a nut which is fastened to said threaded bolt at the end of said threaded bolt opposite the one of said lower housing portion and said upper housing portion; and further wherein said compression spring is located between said nut and one of said lower housing portion and said upper housing portion.
Claim 24
Dependent Claim
86 words
The diaphragm valve of claim 11, wherein said fastening device comprises: a threaded bolt which is tightly screwed with one end into one of said lower housing portion and said upper housing portion; and a nut which is fastened to said threaded bolt at the end of said threaded bolt opposite the one of said lower housing portion and said upper housing portion; and further wherein said compression spring is located between said nut and one of said lower housing portion and said upper housing portion.
Claim 25
Dependent Claim
86 words
The diaphragm valve of claim 12, wherein said fastening device comprises: a threaded bolt which is tightly screwed with one end into one of said lower housing portion and said upper housing portion; and a nut which is fastened to said threaded bolt at the end of said threaded bolt opposite the one of said lower housing portion and said upper housing portion; and further wherein said compression spring is located between said nut and one of said lower housing portion and said upper housing portion.
Claim 26
Dependent Claim
39 words
The diaphragm valve of claim 1, wherein said fastening device comprises a screw having a screw head wherein said compression spring is arranged between said screw head and one of said lower housing portion and said upper housing portion.
Claim 27
Dependent Claim
39 words
The diaphragm valve of claim 2, wherein said fastening device comprises a screw having a screw head wherein said compression spring is arranged between said screw head and one of said lower housing portion and said upper housing portion.
Claim 28
Dependent Claim
39 words
The diaphragm valve of claim 3, wherein said fastening device comprises a screw having a screw head wherein said compression spring is arranged between said screw head and one of said lower housing portion and said upper housing portion.
Claim 29
Dependent Claim
39 words
The diaphragm valve of claim 4, wherein said fastening device comprises a screw having a screw head wherein said compression spring is arranged between said screw head and one of said lower housing portion and said upper housing portion.
Claim 30
Dependent Claim
39 words
The diaphragm valve of claim 5, wherein said fastening device comprises a screw having a screw head wherein said compression spring is arranged between said screw head and one of said lower housing portion and said upper housing portion.
Claim 31
Dependent Claim
39 words
The diaphragm valve of claim 6, wherein said fastening device comprises a screw having a screw head wherein said compression spring is arranged between said screw head and one of said lower housing portion and said upper housing portion.
Claim 32
Dependent Claim
39 words
The diaphragm valve of claim 7, wherein said fastening device comprises a screw having a screw head wherein said compression spring is arranged between said screw head and one of said lower housing portion and said upper housing portion.
Claim 33
Dependent Claim
39 words
The diaphragm valve of claim 8, wherein said fastening device comprises a screw having a screw head wherein said compression spring is arranged between said screw head and one of said lower housing portion and said upper housing portion.
Claim 34
Dependent Claim
39 words
The diaphragm valve of claim 9, wherein said fastening device comprises a screw having a screw head wherein said compression spring is arranged between said screw head and one of said lower housing portion and said upper housing portion.
Claim 35
Dependent Claim
39 words
The diaphragm valve of claim 10, wherein said fastening device comprises a screw having a screw head wherein said compression spring is arranged between said screw head and one of said lower housing portion and said upper housing portion.
Claim 36
Dependent Claim
39 words
The diaphragm valve of claim 11, wherein said fastening device comprises a screw having a screw head wherein said compression spring is arranged between said screw head and one of said lower housing portion and said upper housing portion.
Claim 37
Dependent Claim
39 words
The diaphragm valve of claim 12, wherein said fastening device comprises a screw having a screw head wherein said compression spring is arranged between said screw head and one of said lower housing portion and said upper housing portion.
Claim 38
Dependent Claim
30 words
The diaphragm valve of claim 1, wherein said compression spring is characterized by a prestressing force which is adjustable by turning said fastening device by means of a torque wrench.
Claim 39
Dependent Claim
53 words
The diaphragm valve of claim 37, wherein the compression spring has a prestressing force wherein a sum of the prestressing force of all compression springs utilized is greater than the force produced by the medium pressure and an actuation device upon said lower housing by a factor of 1.5 at an operating temperature.
Claim 40
Dependent Claim
60 words
The diaphragm valve of claim 1, wherein said diaphragm comprises: a first diaphragm element which faces a flow medium and which is constructed of polytetrafluoroethylene; and a second diaphragm element which is arranged behind said first diaphragm element and which is constructed of an elastomer; wherein said first diaphragm element and said second diaphragm element form a two layer diaphragm.
References Cited (Backward Citations)
US3521674A
Cited
US4304257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-26 | 1996-10-26 | 1997-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-26 | 2000-10-26 | 2001-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-26 | 2004-10-26 | 2005-04-27 | $7700.00 | Window Closed / Lapsed |