Patent US3820564A successfully refreshed from Google Patents.
US3820564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispensing valve
Assignee: Watsco Inc
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Filing: 1973-10-09
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Granted: 1974-06-28
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Expires: 1993-10-09
Abstract
Abstract A disposable plastic dispensing valve having a plastic valve body within one end of which is formed an internally threaded bore adjustably screw-threaded within which is the externally threaded shank portion of a valve stem assembly for axial movement thereof between seated and withdrawn positions with respect to a valve seat. The valve body further comprises an increased-diameter cylindrical chamber outwardly of its internally threaded bore within which the threaded shank portion of the valve stem assembly can freely turn when the valve is opened beyond full open position of the valve to prevent forceful turning withdrawal of the valve stem assembly through the upper end of the valve body. Means is provided for resiliently urging the valve stem into inter-threaded engagement with respect to the internally threaded bore of the valve body member to facilitate subsequent shut-off of the valve.
Inventors
- 👤 W Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:11
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/50; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38; F16K27/00; F16K27/02; F16K27/0254; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87829; Y10T137/87837; Y10T137/87853; Y10T137/87861
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
262 words
A dispensing valve comprising, in combination, a valve body member having a first bore defining an inlet port at one end of said body member and communicating, at its inner end, with a valve seat chamber, said chamber defining a circular valve seat at the juncture thereof with said inlet port bore, an internally threaded bore in said body member, outwardly of and in coaxial alignment with said circular valve seat, said internally threaded bore extending at its outer end, into a first increased-diameter bore coaxial with said internally threaded bore, a valve stem and handle assembly comprising a valve stem having a handle at one end, said valve stem comprising, along its length, a coaxial, externally threaded increased-diameter portion threadable in said internally threaded bore in said body member, the other end of said valve stem being formed with a circular surface, complemental with said circular valve seat and seatable thereagainst for sealing off the inner end of said inlet port bore at said valve seat chamber, said externally-threaded portion of said valve stem, when fully un-threaded with respect to said internally threaded bore of said body member, being received within said first increased-diameter bore, and abutment means at said outer end of said first increased-diameter bore co-operative with upper end portions of said increased-diameter externally threaded portion of said valve stem preventing further withdrawal of said valve stem and handle assembly with respect to said body member after said externally threaded increased-diameter portion of said valve stem has been fully received within said first increased-diameter bore of said body member.
Claim 2
Dependent Claim
262 words
A dispensing valve comprising, in combination, a valve body member having a first bore defining an inlet port at one end of said body member and communicating, at its inner end, with a valve seat chamber, said chamber defining a circular valve seat at the juncture thereof with said inlet port bore, an internally threaded bore in said body member, outwardly of and in coaxial alignment with said circular valve seat, said internally threaded bore extending at its outer end, into a first increased-diameter bore coaxial with said internally threaded bore, a valve stem and handle assembly comprising a valve stem having a handle at one end, said valve stem comprising, along its length, a coaxial, externally threaded increased-diameter portion threadable in said internally threaded bore in said body member, the other end of said valve stem being formed with a circular surface, complemental with said circular valve seat and seatable thereagainst for sealing off the inner end of said inlet port bore at said valve seat chamber, said externally-threaded portion of said valve stem, when fully un-threaded with respect to said internally threaded bore of said body member, being received within said first increased-diameter bore, and abutment means at said outer end of said first increased-diameter bore co-operative with upper end portions of said increased-diameter externally threaded portion of said valve stem preventing further withdrawal of said valve stem and handle assembly with respect to said body member after said externally threaded increased-diameter portion of said valve stem has been fully received within said first increased-diameter bore of said body member.
Claim 3
Dependent Claim
27 words
A dispensing valve as defined in claim 1, wherein said valve body member and said valve stem and handle assembly are fabricated of a synthetic plastic material.
Claim 4
Dependent Claim
16 words
A dispensing valve as defined in claim 2, wherein said abutment means comprises a resilient O-ring.
Claim 5
Dependent Claim
71 words
A dispensing valve as defined in claim 1, wherein said abutment means at said outer end of said first increased-diameter bore of said body member is resilient in the axial direction of said valve stem so that said valve stem, when fully unthreaded with respect to said internally threaded bore of said body member, will he yieldingly constrained in abutment with a marginal outer end portion of said internally threaded bore.
Claim 6
Dependent Claim
60 words
A dispensing valve as defined in claim 4, wherein said valve body member further comprises a second increased-diaMeter bore, coaxial with and extending outwardly of said first increaseddiameter bore, said valve body being fabricated of a synthetic plastic material, said abutment means further comprising an inwardly rolled-over upper marginal end portion at the outer end of said second increaded-diameter bore.
Claim 7
Dependent Claim
17 words
A dispensing valve as defined in claim 5, wherein said abutment means comprises a helical compression spring.
Claim 8
Dependent Claim
39 words
A dispensing valve as defined in claim 6, including abutment means seated on the annular peripheral shoulder defined by the juncture of said first and second increased-diameter bores for abuttingly seating the inner end of said helical compression spring.
Claim 9
Dependent Claim
37 words
A dispensing valve as defined in claim 7, wherein the axial length of said externally threaded, increased-diameter portion of said valve stem is greater than the axial length of said first increased-diameter bore of said body member.
Claim 10
Dependent Claim
38 words
A dispensing valve as defined in claim 8, including a pressure relief bore in said body member and means communicating with said inlet port bore for releasing pressure within said inlet port bore at a predetermined pressure value.
Claim 11
Dependent Claim
21 words
A dispensing valve as defined in claim 1, wherein said abutment means comprises a helical compression spring circumjacent said valve stem.
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |