US3712587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow restricting valve
Assignee: AMERICAN LAFRANCE Inc
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Filing: 1971-05-12
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Granted: 1973-01-23
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Expires: 1991-05-12
Abstract
Abstract A flow restricting valve having a valve seat and a movable valve element and means for moving the valve element toward and away from the valve seat. A device on said means for moving the valve element engageable with a collar on said flow restricting valve acting to limit the movement of said means for moving the valve element and wherein one edge of said collar is formed in a spiral engageable with an abutment on said flow stricting valve whereby the relative positioning of the collar is determined by its engagement with said abutment.
Inventors
- 👤 G Specht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:57
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/52; F16K31/524; F16K31/52408; F16K1/00; F16K1/32; F16K1/48; F16K1/482; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8292; Y10T137/8309
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
In a flow restricting valve having a body with inlet and outlet openings and a valve seat therebetween, a movable valve stem carried by said body, a valve element on said valve stem registrable with said valve seat and movable toward and away from said valve seat by said valve stem; means for limiting the movement of said valve stem to restrict the movement of said valve element relative to said valve seat, said means comprising a collar on said valve body having an uppermost annular surface, said collar having a spiral configuration on the uppermost annular surfAce thereof, means on said valve stem engageable with said collar to limit movement of said valve stem, means on said valve body registrable with said spiral configuration on said collar for moving said collar longitudinally of said valve body when said collar is revolved, and means normally holding said collar in adjusted position on said valve body.
Claim 2
Dependent Claim
155 words
In a flow restricting valve having a body with inlet and outlet openings and a valve seat therebetween, a movable valve stem carried by said body, a valve element on said valve stem registrable with said valve seat and movable toward and away from said valve seat by said valve stem; means for limiting the movement of said valve stem to restrict the movement of said valve element relative to said valve seat, said means comprising a collar on said valve body having an uppermost annular surface, said collar having a spiral configuration on the uppermost annular surfAce thereof, means on said valve stem engageable with said collar to limit movement of said valve stem, means on said valve body registrable with said spiral configuration on said collar for moving said collar longitudinally of said valve body when said collar is revolved, and means normally holding said collar in adjusted position on said valve body.
Claim 3
Dependent Claim
40 words
The flow restricting valve of claim 1, wherein a bonnet is on said body, said valve stem being movable through said bonnet, said collar being on said bonnet, and said means registerable with said spiral configuration is on said bonnet.
Claim 4
Dependent Claim
26 words
The flow restricting valve of claim 2 wherein the means for holding the collar in adjusted position comprises set screws in said collar engaging said bonnet.
Claim 5
Dependent Claim
27 words
The flow restricting valve of claim 2 wherein the means on said bonnet registrable with said area of uneven length of said collar comprises a projecting lug.
Claim 6
Dependent Claim
21 words
The flow restricting valve of claim 1, wherein said means on said valve stem engageable with said collar comprises an arm.
Claim 7
Dependent Claim
26 words
The flow restricting valve of claim 5 wherein a hand wheel is positioned on said valve stem and said arm is attached to said hand wheel.
References Cited (Backward Citations)
US1936301A
Cited
US3361148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |