US3698683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for laboratory glassware
Assignee: Daran Products Inc
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Filing: 1970-06-23
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Granted: 1972-10-17
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Expires: 1990-06-23
Abstract
Abstract A valve including a tapered glass barrel having a fluid inlet and an outlet in the wall structure thereof, receiving a rotary fluorocarbon or equivalent plug having a handle portion by which it may be turned in the barrel on its axis, having a complementally tapered portion; the plug, or the plug and the barrel together, defining a fluid passageway between the inlet and outlet when the plug is in an angularly adjusted position thereof. The construction and arrangement of the elements may be such that flow of a liquid through the valve may be visually observed. The plug, which is formed of deformable material, is provided with an axial recess within the portion thereof which is received in the barrel and opening through the smaller tapered end of the plug, providing a relatively thin-walled portion of the plug. An elastomer insert is provided in the recess and a fastener unit is provided to maintain the elements in assembled position which unit comprises a threaded shank which in assembled position is secured to the plug extending axially thereof. The fastener unit also comprises a member co-acting with the shank, overlying the end of the barrel opposite the handle portion of the plug to prevent, with the taper of the barrel and the plug, axial dislocation of the plug. The last-named fastener member is provided with an axial extension to contact and compress the elastomer insert to force it radially against the axial wall of the aforementioned plug recess, thereby expanding the plug in an axial region thereof, which is relatively flexible, to form a tight fluid seal between the plug and the barrel. The plug has frictional contact with the barrel only over a portion of that part of the plug which is received in the barrel, so as to reduce resistance to turning of the plug in the barrel by the handle portion.
Inventors
- 👤 William M De Angelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:56
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/16; F16K5/161; F16K5/02; F16K5/0207; F16K5/025; F16K5/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
265 words
A valve for laboratory glassware comprising: a glass barrel having a conically tapered, smooth, inner surface portion so as to provide a larger inner diametEr in proximity to one end of the barrel, at least two side arms integral with said barrel, each defining a fluid passage communicating with the interior of the barrel, an inert, deformable plastic plug received through said one end of the barrel and rotatable within the barrel, having at least a portion of its outer surface bearing against said inner surface portion and having a complimental taper, said outer surface portion of the plug defining a groove extending partially around the circumference thereof to interconnect said fluid passageways in an angularly adjusted position of the plug, said plug at one end including a handle portion extending from said one end of the barrel, and said plug defining an axial recess extending into the other end of the plug to provide a relatively thin-walled flexible part in the area of said outer surface portion, an annular elastomeric insert received in said recess, and fastener means to retain the elements in assembled condition including a member overlying and coacting with the other barrel end and coacting with a shank in secured relation to the plug in an axial relationship thereto and extending through said insert, said member having associated therewith a compression part engageable with said insert and being adjustable in and out axially of the plug to vary the compression of the insert, said insert on compression expanding said walled portion of the plug into fluid sealing engagement with the barrel.
Claim 2
Dependent Claim
265 words
A valve for laboratory glassware comprising: a glass barrel having a conically tapered, smooth, inner surface portion so as to provide a larger inner diametEr in proximity to one end of the barrel, at least two side arms integral with said barrel, each defining a fluid passage communicating with the interior of the barrel, an inert, deformable plastic plug received through said one end of the barrel and rotatable within the barrel, having at least a portion of its outer surface bearing against said inner surface portion and having a complimental taper, said outer surface portion of the plug defining a groove extending partially around the circumference thereof to interconnect said fluid passageways in an angularly adjusted position of the plug, said plug at one end including a handle portion extending from said one end of the barrel, and said plug defining an axial recess extending into the other end of the plug to provide a relatively thin-walled flexible part in the area of said outer surface portion, an annular elastomeric insert received in said recess, and fastener means to retain the elements in assembled condition including a member overlying and coacting with the other barrel end and coacting with a shank in secured relation to the plug in an axial relationship thereto and extending through said insert, said member having associated therewith a compression part engageable with said insert and being adjustable in and out axially of the plug to vary the compression of the insert, said insert on compression expanding said walled portion of the plug into fluid sealing engagement with the barrel.
Claim 3
Dependent Claim
21 words
A valve as defined in claim 1, wherein said member of the fastener unit is threadedly adjustable axially of the plug.
Claim 4
Dependent Claim
34 words
A valve as defined in claim 1, wherein said member of the fastener unit is angularly fixed to said shank and the latter is threaded into a part in fixed relation to the plug.
Claim 5
Dependent Claim
59 words
A valve as defined in claim 1, including a separable handle of elongated form extending into a bore in said plug handle portion extending transversely of the plug axis, the handle having a threaded transverse bore, said member of the fastener unit being angularly fixed to said shank, and the latter being threaded into said bore in the handle.
Claim 6
Dependent Claim
28 words
A valve as defined in claim 1, wherein the outer surface bearing portion of the plug has a substantially smaller area than the inner surface of the barrel.
Claim 7
Dependent Claim
31 words
A valve as defined in claim 1 wherein the outer surface bearing portion of the plug has a substantially smaller bearing area than said tapered inner surface portion of the barrel.
Claim 8
Dependent Claim
30 words
A valve as defined in claim 1, wherein said plug groove includes at least one metering portion in which the cross-sectional area of the groove varies with the groove length.
Claim 9
Dependent Claim
14 words
A valve as defined in claim 1, wherein said plug recess is substantially cylindrical.
Claim 10
Dependent Claim
23 words
A valve as defined in claim 5, wherein said outer surface bearing portion of the plug is substantially midway between the barrel ends.
Claim 11
Dependent Claim
18 words
A valve as defined in claim 7, wherein said metering portion comprises a tapered end of said groove.
Claim 12
Dependent Claim
236 words
A valve for laboratory glassware comprising, a glass barrel having a conically tapered, smooth, inner surface portion so as to provide a larger inner diameter in proximity to one end of the barrel, at least two side arms integral with said barrel, each defining a fluid passage communicating with the interior of the barrel, an inert, deformable plastic plug received through said one end of the barrel and rotatable within the barrel, having at least the portion of its outer surface bearing against said inner surface portion and having a complemental taper, the plug having means defining a fluid channel therein to interconnect said fluid passageways in an angularly adjusted position of the plug, said plug at one end including a handle portion extending from said one end of the barrel, and said plug defining an axial recess extending into the other end of the plug to provide a relatively thin-walled flexible portion in the area of said outer surface portion, an annular elastomeric insert snugly received in said recess, and a screw including A threaded elongated shank extending through said insert and threaded into a part in a fixed relation to said handle portion, said screw having an enlarged head coacting with the other end of said barrel and carrying a compression part engageable with said insert, said insert on compression expanding said flexible wall portion of the plug into sealing engagement with the barrel.
Claim 13
Dependent Claim
236 words
A valve for laboratory glassware comprising, a glass barrel having a conically tapered, smooth, inner surface portion so as to provide a larger inner diameter in proximity to one end of the barrel, at least two side arms integral with said barrel, each defining a fluid passage communicating with the interior of the barrel, an inert, deformable plastic plug received through said one end of the barrel and rotatable within the barrel, having at least the portion of its outer surface bearing against said inner surface portion and having a complemental taper, the plug having means defining a fluid channel therein to interconnect said fluid passageways in an angularly adjusted position of the plug, said plug at one end including a handle portion extending from said one end of the barrel, and said plug defining an axial recess extending into the other end of the plug to provide a relatively thin-walled flexible portion in the area of said outer surface portion, an annular elastomeric insert snugly received in said recess, and a screw including A threaded elongated shank extending through said insert and threaded into a part in a fixed relation to said handle portion, said screw having an enlarged head coacting with the other end of said barrel and carrying a compression part engageable with said insert, said insert on compression expanding said flexible wall portion of the plug into sealing engagement with the barrel.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |