US4185740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable capsules
Assignee: Dentsply Research and Development Corp
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Filing: 1978-08-02
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Granted: 1980-01-29
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Expires: 1998-08-02
Abstract
Abstract The instant invention relates to disposable capsules which contain coreactive components in separate chambers and means for automatically combining and mixing said coreactive components prior to opening the capsule. The instant disposable capsules may contain dental amalgam precursors such as mercury and silver which may be combined and mixed merely by placing such capsule in a dental amalgamator. The disposable capsules comprise a hollow cylindrical section closed at one end and having an internal constriction spaced from the other end, and a movable insert comprising a stem having an upper portion inserted through and frictionally engaging said constriction and a flange extending outwardly about the lower end of said stem and frictionally engaging the inner wall of the hollow cylindrical section, whereby said flange initially divides said cylinder into two noncommunicating chambers.
Inventors
- 👤 Alan J. Perfect
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:20
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/60; A61C5/66; A61C5/62; A61C5/64
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
142 words
A disposable capsule comprising (1) a hollow cylindrical section, said hollow cylindrical section having an axially located shoulder spaced from the ends of the cylinder such that the internal diameter of such cylinder at a point spaced from its ends is thereby provided with a constriction; (2) a plug being detachably secured to the lower end of said hollow cylindrical section; and (3) an insert comprising a stem having an upper portion which is inserted through and frictionally engages said constriction and a flange extending outwardly about the lower end of said stem, said flange being spaced from said shoulder and said plug and being frictionally engaged with the inner wall of said hollow cylindrical section along the entire periphery thereof, whereby said cylinder and said plug forms a mixing chamber and said flange divides said mixing chamber into two non-communicating chambers.
Claim 2
Dependent Claim
142 words
A disposable capsule comprising (1) a hollow cylindrical section, said hollow cylindrical section having an axially located shoulder spaced from the ends of the cylinder such that the internal diameter of such cylinder at a point spaced from its ends is thereby provided with a constriction; (2) a plug being detachably secured to the lower end of said hollow cylindrical section; and (3) an insert comprising a stem having an upper portion which is inserted through and frictionally engages said constriction and a flange extending outwardly about the lower end of said stem, said flange being spaced from said shoulder and said plug and being frictionally engaged with the inner wall of said hollow cylindrical section along the entire periphery thereof, whereby said cylinder and said plug forms a mixing chamber and said flange divides said mixing chamber into two non-communicating chambers.
Claim 3
Dependent Claim
18 words
The capsule of claim 1 wherein the edge of said flange is tapered around the entire periphery thereof.
Claim 4
Dependent Claim
19 words
The capsule of claim 1 including radially oriented equidistantly spaced ribs about upper portion of the hollow cylindrical section.
Claim 5
Dependent Claim
40 words
The capsule of claim 3 wherein said ribs are curved toward the upper end of said hollow cylindrical section, extend toward the lower end of hollow cylindrical section and merge with the walls thereof at a point proximate said shoulder.
Claim 6
Dependent Claim
32 words
The capsule of claim 1 wherein said shoulder divides the internal volume of said hollow cylindrical section into an upper stem receiving chamber and a lower chamber for retaining a coreactive component.
Claim 7
Dependent Claim
20 words
The capsule of claim 5 wherein said stem is lesser in length than the length of said stem receiving chamber.
Claim 8
Dependent Claim
27 words
The capsule of claim 1 wherein the periphery of said flange is disc like and of greater dimension than the internal diameter of said hollow cylindrical section.
Claim 9
Dependent Claim
15 words
The capsule of claim 1 wherein said insert is made of a resiliently flexible material.
Claim 10
Dependent Claim
14 words
The capsule of claim 1 wherein said shoulder is frusto conical in cross section.
Claim 11
Dependent Claim
19 words
The capsule of claim 1 wherein said hollow cylindrical section includes an axially extending groove about its lower end.
Claim 12
Dependent Claim
35 words
The capsule of claim 10 wherein said plug includes a hemispherically shaped lower end and a hollow cylindrical upper end which is dimensioned to telescopically engage the axially extending groove of said hollow cylindrical section.
Claim 13
Dependent Claim
14 words
The capsule of claim 1 wherein said plug includes an external axially extending ridge.
Claim 14
Dependent Claim
22 words
The capsule of claim 1 wherein the upper surface of said flange conforms in shape to the lower surface of said shoulder.
Claim 15
Dependent Claim
74 words
A capsule divided into two chambers by slidable barrier means, said slidable barrier means movable from a first position to a second position by a force from within said capsule directed against such slidable barrier when said capsule is shaken, said chambers being capable of holding coreactive components separate while said slidable barrier is in said first position and said chambers being in communication when said slidable barrier means is in said second position.
Claim 16
Dependent Claim
74 words
A capsule divided into two chambers by slidable barrier means, said slidable barrier means movable from a first position to a second position by a force from within said capsule directed against such slidable barrier when said capsule is shaken, said chambers being capable of holding coreactive components separate while said slidable barrier is in said first position and said chambers being in communication when said slidable barrier means is in said second position.
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) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |