US3858843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball valve and the like having locking handle
Assignee: Chemetron Corp
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Filing: 1974-04-11
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Granted: 1975-01-07
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Expires: 1994-04-11
Abstract
Abstract In a valve of the type comprising a housing having a conduit for fluid flow, a closure relatively mounted within the housing, a stem operatively associated with the closure, and a handle operatively associated with the stem, the handle is displaceable relative to the stem between a position wherein the handle clears the housing for conjoint rotation of the handle with the stem and the closure and a position wherein the handle is adapted to engage the housing to prevent unintentional opening of the valve if the valve is closed and unintentional closing of the valve if the valve is opened.
Inventors
- 👤 Leonard Joseph Hartmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:54
CPC Classifications
F; F16; F16K; F16K35/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
453 words
A valve comprising: a housing having a conduit for fluid flow and one external abutment; a closure rotatably mounted within said housing and adapted to prevent fluid flow through said conduit when rotated to a first rotated position relative to said housing and to permit fluid flow through said conduit when rotated to a second rotated position relative to said housing; a stem operatively associated with said closure for conjoint rotation of said stem with said closure said stem having a portion extending outside said housing; a handle having a grip portion and an end portion and being operatively associated with said stem for conjoint rotation of said handle with said stem and thus with said closure, said end poRtion having a first and second edges; a plate operatively associated with said stem portion for conjoint rotation of said plate with said stem and said closure relative to said housing and connected to said handle for pivotal displacement of said handle relative to said plate about a fulcrum located between the grip and end portions of said handle and thus relative to said stem and for conjoint rotation of said handle with said plate and thus said stem and said closure, said plate having a first portion and a second portion; means for biasing said handle toward said plate, said handle being pivotable about said fulcrum between a first pivoted position relative to said stem wherein the end portion of said handle clears said housing abutment to permit conjoint rotation of said handle with said stem and thus said closure through a range of angular displacement and a second pivoted position relative to said stem wherein, when said handle is rotated conjointly with said stem and said closure to said first rotated position of said closure relative to said housing, to prevent fluid flow, said first edge of the end portion of said handle and said first portion of said plate straddle said housing abutment to prevent conjoint rotation of said handle with said stem and said closure through said range of angular displacement to said second rotated position of said closure, and wherein, when said handle being pivoted to a first pivoted position wherein the end portion of said handle clears said housing abutment and a second pivoted position wherein said handle is rotated conjointly with said stem and thus said closure to said second rotated position of said closure, said second edge of the end portion of said handle and said second portion of said plate straddle said housing abutment to prevent conjoint rotation of said handle with said stem and said closure through said range of angular displacement to said first rotated position of said closure relative to said housing.
Claim 2
Dependent Claim
453 words
A valve comprising: a housing having a conduit for fluid flow and one external abutment; a closure rotatably mounted within said housing and adapted to prevent fluid flow through said conduit when rotated to a first rotated position relative to said housing and to permit fluid flow through said conduit when rotated to a second rotated position relative to said housing; a stem operatively associated with said closure for conjoint rotation of said stem with said closure said stem having a portion extending outside said housing; a handle having a grip portion and an end portion and being operatively associated with said stem for conjoint rotation of said handle with said stem and thus with said closure, said end poRtion having a first and second edges; a plate operatively associated with said stem portion for conjoint rotation of said plate with said stem and said closure relative to said housing and connected to said handle for pivotal displacement of said handle relative to said plate about a fulcrum located between the grip and end portions of said handle and thus relative to said stem and for conjoint rotation of said handle with said plate and thus said stem and said closure, said plate having a first portion and a second portion; means for biasing said handle toward said plate, said handle being pivotable about said fulcrum between a first pivoted position relative to said stem wherein the end portion of said handle clears said housing abutment to permit conjoint rotation of said handle with said stem and thus said closure through a range of angular displacement and a second pivoted position relative to said stem wherein, when said handle is rotated conjointly with said stem and said closure to said first rotated position of said closure relative to said housing, to prevent fluid flow, said first edge of the end portion of said handle and said first portion of said plate straddle said housing abutment to prevent conjoint rotation of said handle with said stem and said closure through said range of angular displacement to said second rotated position of said closure, and wherein, when said handle being pivoted to a first pivoted position wherein the end portion of said handle clears said housing abutment and a second pivoted position wherein said handle is rotated conjointly with said stem and thus said closure to said second rotated position of said closure, said second edge of the end portion of said handle and said second portion of said plate straddle said housing abutment to prevent conjoint rotation of said handle with said stem and said closure through said range of angular displacement to said first rotated position of said closure relative to said housing.
Claim 3
Dependent Claim
34 words
The valve of claim 1 wherein a tongue pierced from said plate extends through a slot formed in said handle to provide said fulcrum for pivotal displacement of said handle relative to said plate.
Claim 4
Dependent Claim
53 words
The valve of claim 2 wherein said stem extends through a sufficiently sized opening in said handle to permit pivotal displacement of said handle relative to said plate and wherein said stem restrains movement of said handle when said handle is in a location corresponding to said first and second rotated closure positions.
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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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |