US5638997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bone cement injector gun
Assignee: Zimmer Technology Inc
•
Filing: 1995-09-18
•
Granted: 1997-06-17
•
Expires: 2015-09-18
Abstract
Abstract A paste injector gun, especially adapted for injecting bone cement, has first and second mechanical advantages corresponding to different portions of the trigger stroke. The first mechanical advantage is greater than the second such that the first facilitates pressurizing the bone cement and the second facilitates high volume dispensing of the bone cement. The injector gun also includes a pair of U-shaped slots. One of the slots is sized to accept a large cement cartridge and the other slot is sized to accept a small cement cartridge.
Inventors
- 👤 Michael E. Hawkins
- 👤 Stephen H. Hoag
- 👤 Kirt L. Case
- 👤 Kwan-Ho Chan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:08
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8802; A61B17/8833; A61B17/8805; A61B17/8822; B; B05; B05C; B05C17/00; B05C17/005; B05C17/01; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1553; Y10T74/1558; Y10T74/1587; Y10T74/1598; Y10T74/20; Y10T74/20558; Y10T74/20576; Y10T74/20582; Y10T74/206
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
129 words
A paste injector gun comprising: a trigger having a range of travel with first and second stages, the first stage being from an initial rest position to an intermediate position and the second stage being from the intermediate position to a subsequent position of further trigger travel; first pivot means for providing a first center of rotation for the trigger, the first pivot means being engaged during the first stage of travel, the first pivot means corresponding to a first mechanical advantage; and second pivot means for providing a second center of rotation for the trigger, the second pivot means being engaged during the second stage of travel, the second pivot means corresponding to a second mechanical advantage, the second mechanical advantage being lower than the first mechanical advantage.
Claim 2
Dependent Claim
129 words
A paste injector gun comprising: a trigger having a range of travel with first and second stages, the first stage being from an initial rest position to an intermediate position and the second stage being from the intermediate position to a subsequent position of further trigger travel; first pivot means for providing a first center of rotation for the trigger, the first pivot means being engaged during the first stage of travel, the first pivot means corresponding to a first mechanical advantage; and second pivot means for providing a second center of rotation for the trigger, the second pivot means being engaged during the second stage of travel, the second pivot means corresponding to a second mechanical advantage, the second mechanical advantage being lower than the first mechanical advantage.
Claim 3
Dependent Claim
34 words
The paste injector gun of claim 1 further comprising a housing and wherein the first and second pivot means comprise first and second fulcrums attached to the housing and bearing portions on the trigger.
Claim 4
Dependent Claim
13 words
The paste injector gun of claim 2 wherein the fulcrums are cylindrical pins.
Claim 5
Dependent Claim
36 words
The paste injector gun of claim 1 further comprising a housing and wherein the first and second pivot means comprise first and second fulcrums attached to the trigger and a beating member attached to the housing.
Claim 6
Dependent Claim
16 words
The paste injector gun of claim 4 wherein the fulcrums are bumps formed on the trigger.
Claim 7
Dependent Claim
49 words
The paste injector gun of claim 1 further including a cartridge adapter containing first and second parallel U-shaped slots positioned along a common axis, the first slot being sized to accept a small diameter cement cartridge and the second slot being sized to accept a large diameter cement cartridge.
Claim 8
Dependent Claim
67 words
A paste injector gun for dispensing a paste from a cartridge, the paste injector gun comprising a means for gripping the cartridge, the means for gripping the cartridge being able to grip cartridges of at least two different diameters such that the same paste injector gun can be used to dispense paste from both small and large cartridges and means for dispensing the paste from the cartridge.
Claim 9
Dependent Claim
67 words
A paste injector gun for dispensing a paste from a cartridge, the paste injector gun comprising a means for gripping the cartridge, the means for gripping the cartridge being able to grip cartridges of at least two different diameters such that the same paste injector gun can be used to dispense paste from both small and large cartridges and means for dispensing the paste from the cartridge.
Claim 10
Dependent Claim
55 words
The paste injector gun of claim 7 wherein the means for gripping the cartridge includes a cartridge adapter containing first and second parallel U-shaped slots positioned along a common axis, the first slot being sized to accept a small diameter cement cartridge and the second slot being sized to accept a large diameter cement cartridge.
Claim 11
Dependent Claim
81 words
The paste injector gun of claim 8 wherein the first slot is positioned on the common axis nearer to the means for dispensing the paste from the cartridge and the second slot is positioned on the common axis further from the means for dispensing the paste from the cartridge such that a said cartridge engaged with the first slot will extend through the second slot and a said cartridge engaged with the second slot will not extend through the first slot.
Claim 12
Dependent Claim
22 words
The paste injector gun of claim 9 wherein the first and second slots each include a peripheral groove for engaging the cartridge.
Claim 13
Dependent Claim
20 words
The paste injector gun of claim 10 wherein the first slot is at least 15% narrower than the second slot.
Claim 14
Dependent Claim
94 words
A paste injector gun comprising: shaft means for translation along an axis; advancing means for advancing the shaft along the axis, the advancing means including a trigger having a range of rotation from a rest position to a stop position, the range of rotation having first and second stages, the shaft advancing a first predetermined distance for each degree of trigger rotation in the first stage, the shaft advancing a second predetermined distance for each degree of trigger rotation in the second stage, the second predetermined distance being greater than the first predetermined distance.
Claim 15
Dependent Claim
94 words
A paste injector gun comprising: shaft means for translation along an axis; advancing means for advancing the shaft along the axis, the advancing means including a trigger having a range of rotation from a rest position to a stop position, the range of rotation having first and second stages, the shaft advancing a first predetermined distance for each degree of trigger rotation in the first stage, the shaft advancing a second predetermined distance for each degree of trigger rotation in the second stage, the second predetermined distance being greater than the first predetermined distance.
Claim 16
Dependent Claim
21 words
The paste injector gun of claim 12 wherein the second predetermined distance is at least 1.1 times the first predetermined distance.
Claim 17
Dependent Claim
22 words
The paste injector gun of claim 12 wherein the second predetermined distance is from 2 to 4 times the first predetermined distance.
Claim 18
Dependent Claim
40 words
The paste injector gun of claim 12 wherein the advancing means further includes first and second fulcrums, the trigger rotating about the first fulcrum during the first stage and the trigger rotating about the second fulcrum during the second stage.
Claim 19
Dependent Claim
31 words
The paste injector gun of claim 15 wherein the trigger has an input end and an output end, the first fulcrum being closer to the output end than the second fulcrum.
Claim 20
Dependent Claim
49 words
The paste injector gun of claim 12 further including a cartridge adapter containing first and second parallel U-shaped slots positioned along a common axis, the first slot being sized to accept a small diameter cement cartridge and the second slot being sized to accept a large diameter cement cartridge.
References Cited (Backward Citations)
US2732102A
Cited
US2305238A
Cited
US2750943A
Cited
US3029653A
Cited
US3053457A
Cited
US3255747A
Cited
US3160156A
Cited
US3141583A
Cited
US3193146A
Cited
US3894663A
Cited
US4090639A
Cited
US4339058A
Cited
US4338925A
Cited
US4342310A
Cited
US4356938A
Cited
US4364388A
Cited
US4569662A
Cited
US4406654A
Cited
US4425121A
Cited
US4619613A
Cited
US4429589A
Cited
US4546767A
Cited
US4671263A
Cited
US4787893A
Cited
US4768955A
Cited
US4861339A
Cited
US4966601A
Cited
US4973334A
Cited
US4738664A
Cited
WO1989001322A1
Cited
US4840294A
Cited
US5022563A
Cited
US4994065A
Cited
US5197635A
Cited
US5125836A
Cited
US5304147A
Cited
US5431654A
Cited
US5381931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-16 | 2000-12-16 | 2001-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-16 | 2004-12-16 | 2005-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-16 | 2008-12-16 | 2009-06-17 | $7700.00 | Window Closed / Lapsed |