Patent US3890712A successfully refreshed from Google Patents.
US3890712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saliva ejector
Assignee: Individual
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Filing: 1973-08-29
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Granted: 1975-06-24
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Expires: 1993-08-29
Abstract
Abstract An extension unit for use in conjunction with a dental saliva ejector apparatus is provided comprising a strainer section. One embodiment provides for a removable strainer employing a threaded section while alternate embodiments provide for multi-unit removable strainers and for self contained strainer extension units.
Inventors
- 👤 Oscar Lopez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/06; A61C17/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
139 words
An improved saliva ejector comprising: a pliable semi-rigid tubular end piece being open at one end and defining a perforate closure at the other end; a strainer unit of integral construction adapted to receive, in friction fit, said tubular end piece; first connecting means to secure said strainer unit to a suction tube; said strainer unit including a head which defines an orifice dimensioned to frictionally receive said tubular end piece, an elongated cylindrical strainer open at one end to communicate with said orifice and closed at its other end and an intermediate section disposed between said head and said strainer with externally threaded second connecting means for securing said strainer unit to said first connecting means, said strainer having an exterior diameter less than the interior diameter of said first connecting means to provide an annular space therebetween.
Claim 2
Dependent Claim
139 words
An improved saliva ejector comprising: a pliable semi-rigid tubular end piece being open at one end and defining a perforate closure at the other end; a strainer unit of integral construction adapted to receive, in friction fit, said tubular end piece; first connecting means to secure said strainer unit to a suction tube; said strainer unit including a head which defines an orifice dimensioned to frictionally receive said tubular end piece, an elongated cylindrical strainer open at one end to communicate with said orifice and closed at its other end and an intermediate section disposed between said head and said strainer with externally threaded second connecting means for securing said strainer unit to said first connecting means, said strainer having an exterior diameter less than the interior diameter of said first connecting means to provide an annular space therebetween.
Claim 3
Dependent Claim
72 words
An improved saliva ejector according to claim 1 wherein said first connecting means for securing said strainer unit to said suction tube comprises an intermediate tubular section having inwardly disposed threaded portions at each end thereof, one of said threaded portions adapted to threadably engage said second connecting means of said strainer unit and the other of said threaded portions adapted to threadably engage a corresponding threaded portion of said suction tube.
Claim 4
Dependent Claim
63 words
A disposable saliva ejector extension unit which comprises: a pliable semi-rigid tube, open at one end and defining a perforated closure at the other end; an elongated cylindrical strainer fixed secured within said tube, said strainer having an exterior diameter less than the interior diameter of said tube to pRovide a space therebetween and means for connecting said tube to a suction tube.
Claim 5
Dependent Claim
63 words
A disposable saliva ejector extension unit which comprises: a pliable semi-rigid tube, open at one end and defining a perforated closure at the other end; an elongated cylindrical strainer fixed secured within said tube, said strainer having an exterior diameter less than the interior diameter of said tube to pRovide a space therebetween and means for connecting said tube to a suction tube.
Claim 6
Dependent Claim
128 words
An improved strainer unit for saliva ejectors which comprises: a head member defining at least two orifices, each of said orifices communicating interiorly with a common passage, said orifices dimensioned to receive, in friction fit, tubular end members; an integral cylindrical strainer communicating at one end with said common passage and closed at its other end; means for connecting said head and strainer to a suction tube whereby said strainer extends within said suction tube, said strainer being dimensioned so that its exterior diameter is less than the interior diameter of said suction tube to provide an annular space therebetween; and cover means mounted to said head to cover at least one of said orifices and including spring means to normally bias said cover to close said orifice.
Claim 7
Dependent Claim
128 words
An improved strainer unit for saliva ejectors which comprises: a head member defining at least two orifices, each of said orifices communicating interiorly with a common passage, said orifices dimensioned to receive, in friction fit, tubular end members; an integral cylindrical strainer communicating at one end with said common passage and closed at its other end; means for connecting said head and strainer to a suction tube whereby said strainer extends within said suction tube, said strainer being dimensioned so that its exterior diameter is less than the interior diameter of said suction tube to provide an annular space therebetween; and cover means mounted to said head to cover at least one of said orifices and including spring means to normally bias said cover to close said orifice.
Claim 8
Dependent Claim
38 words
A strainer unit according to claim 4 wherein said connecting means comprises a threaded section disposed between said head member and said strainer, said threaded section being dimensioned to threadably engage corresponding threads disposed on said suction tube.
Claim 9
Dependent Claim
62 words
A strainer unit according to claim 4 wherein said connecting means comprises a threaded section disposed between said head member and said strainer, and a tubular section having inwardly disposed threads at each end thereof, one of said ends being threadably engageable with said threads one said strainer unit and the other of said ends being threadably engageable with said suction tube.
Claim 10
Dependent Claim
23 words
An improved saliva ejector according to claim 1 wherein said first connecting means comprises internal threads at one end of said suction tube.
Claim 11
Dependent Claim
18 words
An improved saliva ejector according to claim 1 wherein said cylindrical strainer is about two inches in length.
Claim 12
Dependent Claim
18 words
An improved strainer unit according to claim 4, wherein said cylindrical strainer is about two inches in length.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |