Patent US4295828A successfully refreshed from Google Patents.
US4295828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ejector holder for syringe-type cartridge
Assignee: Dentsply Research and Development Corp
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Filing: 1980-09-25
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Granted: 1981-10-20
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Expires: 2000-09-25
Abstract
Abstract A manually-operable ejector holder for a loaded syringe-type cartridge having an annular collar on one end and a discharge tip on the other end and including an elongated barrel having a piston slidable therein and actuated by a fixed handle on one end of the barrel and a pivoted operating lever cooperable with the handle. The opposite end of the barrel has a curved transverse recess to receive a portion of the collar on the cartridge and a pivoted locking member has a corresponding curved transverse recess in opposition to and cooperable with the recess in the opposite end of said barrel to receive an opposite portion of the collar on the cartridge, and a sleeve is slidable over said locking member and along said opposite end of said barrel to detachably connect said cartridge to said holder.
Inventors
- 👤 Helmut Rudler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:38
CPC Classifications
A; A61; A61M; A61M3/00; A61C; A61C5/00; A61C5/60; A61C5/62; A61C9/00; A61C9/0026; B; B05; B05C; B05C17/00; B05C17/005; B05C17/00596; B05C17/00503; B05C17/00516
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
195 words
A manually-operable ejector holder for a loaded syringe-type cartridge provided with an annular collar on one end and a discharge tip on the other, said holder comprising in combination, an elongated barrel, a plunger reciprocable therein and one end thereof projecting beyond one end of said barrel, manually engageable means on said one end of said barrel operable to reciprocate said plunger toward and from the other end of said barrel, said other end of said barrel having a curved transverse recess positioned and operable to receive a portion of said collar on said cartridge, a locking member having one end pivotally connected to said barrel and also having a curved transverse recess complementary to said opposite recess in said other end of said barrel and operable to receive an opposite portion of said collar on said cartridge, and a securing member slidable over said locking member and along the other end of said barrel to releasably connect said cartridge to said holder and the other end of said plunger being slidable toward said cartridge in axial alignment with said collar of said cartridge to penetrate said cartridge and effect discharge to the contents thereof.
Claim 2
Dependent Claim
195 words
A manually-operable ejector holder for a loaded syringe-type cartridge provided with an annular collar on one end and a discharge tip on the other, said holder comprising in combination, an elongated barrel, a plunger reciprocable therein and one end thereof projecting beyond one end of said barrel, manually engageable means on said one end of said barrel operable to reciprocate said plunger toward and from the other end of said barrel, said other end of said barrel having a curved transverse recess positioned and operable to receive a portion of said collar on said cartridge, a locking member having one end pivotally connected to said barrel and also having a curved transverse recess complementary to said opposite recess in said other end of said barrel and operable to receive an opposite portion of said collar on said cartridge, and a securing member slidable over said locking member and along the other end of said barrel to releasably connect said cartridge to said holder and the other end of said plunger being slidable toward said cartridge in axial alignment with said collar of said cartridge to penetrate said cartridge and effect discharge to the contents thereof.
Claim 3
Dependent Claim
114 words
The holder according to claim 1 in which said other end of said barrel is cut away longitudinally a limited amount inward from said end for substantially half the diameter thereof to form a projecting end of half the depth of said barrel and said curved recess being formed in said projecting end, said locking member being complementary in transverse shape to said projecting end of said barrel and overlying the same when in locking position around the collar of said cartridge, and said securing member comprising a sleeve and the exterior of said locking member and projecting end each being semi-cylindrical and abutting each other to be received slidably within said securing sleeve.
Claim 4
Dependent Claim
33 words
The holder according to claim 2 in which said projecting end and locking member when in locking position have a combined interior axial bore to slidably receive said other end of said plunger.
Claim 5
Dependent Claim
58 words
The holder according to claim 2 in which the end of said locking member opposite its outer end is the end that is pivotally connected to said barrel to permit pivotal movement of the outer end of said locking member away from said projecting end to permit insertion and removal of said cartridge into and from said holder.
Claim 6
Dependent Claim
59 words
The holder according to claim 2 in which said securing sleeve has a slot of limited length therein and the outer end of a projecting pin secured to said barrel is disposed within said slot to limit the slidable movement of said sleeve between securing and release positions thereof for retaining or releasing said cartridge relative to said holder.
Claim 7
Dependent Claim
198 words
The holder according to claim 1 in which said other end of the barrel is cut away longitudinally a limited amount for substantially half the diameter of the barrel to form a projecting forward end on said barrel and said locking member being complementary in shape to said projecting end of the barrel and being disposed in said cut-away portion of the barrel and complementary in shape to said projecting end to form a cylindrical outer surface on said projecting end and locking member and also forming an interior bore when the same are in abutting position for locking, said locking member also having opposed ears extending along opposite surfaces of said projecting end of said barrel and a pivot pin extending through said ears and projecting end of said barrel at a location therein spaced from the portion of said bore in said projecting end of said barrel, and said securing member comprising a cylindrical sleeve slidable upon said barrel and also slidable over said projecting end of said barrel and locking member when the latter abuts said projecting end of the barrel in locking position to secure a cartridge to the forward end of said holder.
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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |