US3701362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position indicating butterfly valve
Assignee: Dresser Industries Inc
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Filing: 1971-07-12
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Granted: 1972-10-31
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Expires: 1991-07-12
Abstract
Abstract A butterfly valve construction having an outside indicator for indicating vane relation between open and closed positions of the valve. A single assembly mode between the vane, drive shaft and outside indicator assures accurate exterior indication of vane relation. Vane operating force is transmitted through a replaceable shear pin which, in event of operating interference, fractures to prevent damage to other valve components.
Inventors
- 👤 Anthony L Reese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:15
CPC Classifications
F; F16; F16K; F16K37/00; F16K37/0008; F16K1/00; F16K1/16; F16K1/18; F16K1/22; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1669; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8292; Y10T137/8811
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
153 words
In a butterfly valve including a housing defining a fluid passage between an inlet and an outlet, a vane member interposed in said passage and rotatable between positions to open and close said passage to fluid flow, a gasket secured to said vane for effecting passage sealing when said vane is in said close position, an operator for rotatably operating said vane between said positions, a shaft operably connecting said operator to said vane, and an indicator exterior of said housing for registering vane position within said passage, the improvement comprising: a. a first one mode relatively oriented interconnection between said shaft and said operator; b. a second one mode relatively oriented interconnection between said shaft and said indicator; and c. a third one mode relatively oriented interconnection between said vane and said shaft including interlocking means located extending inward of said vane in a sealed relation from the underside of said gasket.
Claim 2
Dependent Claim
153 words
In a butterfly valve including a housing defining a fluid passage between an inlet and an outlet, a vane member interposed in said passage and rotatable between positions to open and close said passage to fluid flow, a gasket secured to said vane for effecting passage sealing when said vane is in said close position, an operator for rotatably operating said vane between said positions, a shaft operably connecting said operator to said vane, and an indicator exterior of said housing for registering vane position within said passage, the improvement comprising: a. a first one mode relatively oriented interconnection between said shaft and said operator; b. a second one mode relatively oriented interconnection between said shaft and said indicator; and c. a third one mode relatively oriented interconnection between said vane and said shaft including interlocking means located extending inward of said vane in a sealed relation from the underside of said gasket.
Claim 3
Dependent Claim
40 words
In a butterfly valve according to claim 1 in which said first interconnection includes a tapered shear pin having shear properties affording failure at operator imposed torque below tolerable stress levels of connected components through which said torque is transmitted.
Claim 4
Dependent Claim
34 words
In a butterfly valve according to claim 2 in which the failure level of said shear pin is about 60 percent intermediate the normal operating level and the failure level of said connected components.
Claim 5
Dependent Claim
22 words
In a butterfly valve according to claim 3 in which said shear pin is of a metal different than said connected components.
Claim 6
Dependent Claim
25 words
In a butterfly valve according to claim 4 in which said shear pin is brass and said connected components are generally of a steel composition.
Claim 7
Dependent Claim
35 words
In a butterfly valve according to claim 1 in which said second interconnection includes a rotational interlock between said shaft and said indicator at the shaft end opposite said vane and outward of said operator.
Claim 8
Dependent Claim
31 words
In a butterfly valve according to claim 1 in which said inteRlocking means comprises a pin extending radially of said shaft into oppositely aligned apertures of said shaft and said vane.
Claim 9
Dependent Claim
48 words
In a butterfly valve according to claim 7 in which said gasket is annular and radially superposed to a radially extending annular surface on said vane and said pin extends in the vane generally parallel to the vane axis from about said annular surface to into said shaft.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |