Battery powered surgical handpiece
First Claim
1. A pistol-shaped surgical handpiece, comprising:
- a pistol-shaped housing including a forward/rearward extending barrel and a handle depending from said barrel;
a motor supported in said barrel and having a rotatable motor shaft extending substantially axially forward along said barrel;
a tool carrier located at the front end of said barrel and driven by a hollow output shaft;
speed changer means for driving said output shaft and tool carrier from said motor shaft at a speed different from said motor shaft, said motor and speed changer means and tool carrier being aligned in said barrel, said motor and speed changer means having a continuous central passage therethrough extending to said tool carrier and defined by extension of said hollow output shaft axially through said motor and speed changer means.
4 Assignments
0 Petitions
Accused Products
Abstract
A pistol-shaped surgical handpiece comprises a pistol-shaped housing including a forward/rearward extending barrel and a handle fixedly depending from the barrel. A motor and control circuit are supported in the barrel. The motor drives a tool carrier at the front end of the barrel. In one preferred embodiment, the housing is of formed sheet metal and the motor, control unit and a drive train for driving the tool carrier, are mounted as a sealed unitary cartridge within the sheet metal barrel. In one embodiment, the battery is inserted upward into the bottom of the handle and telescopes therein for a substantial distance to permit a relatively compact handle arrangement while yet permitting a full size handle rigidly joined to the barrel of the housing.
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Citations
22 Claims
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1. A pistol-shaped surgical handpiece, comprising:
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a pistol-shaped housing including a forward/rearward extending barrel and a handle depending from said barrel; a motor supported in said barrel and having a rotatable motor shaft extending substantially axially forward along said barrel; a tool carrier located at the front end of said barrel and driven by a hollow output shaft; speed changer means for driving said output shaft and tool carrier from said motor shaft at a speed different from said motor shaft, said motor and speed changer means and tool carrier being aligned in said barrel, said motor and speed changer means having a continuous central passage therethrough extending to said tool carrier and defined by extension of said hollow output shaft axially through said motor and speed changer means. - View Dependent Claims (2, 3, 4, 5)
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6. A pistol-shaped surgical handpiece, comprising:
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a pistol-shaped housing including a forward/rearward extending barrel and a handle depending from said barrel; a motor supported in said barrel and having a rotatable shaft extending substantially axially forward along said barrel; a tool carrier located at the front end of said barrel and means for driving said tool carrier from said rotatable motor shaft, said rotatable motor shaft being hollow through its length and rotatable at a first speed, said driving means comprising speed changer means located in said barrel between said motor and tool carrier, said driving means further comprising an output shaft for driving said tool carrier from said speed changer means at a second speed, different from said first speed of said motor shaft, said output shaft extending axially through said hollow motor shaft. - View Dependent Claims (7, 8)
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9. A pistol-shaped surgical handpiece, comprising:
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a pistol-shaped housing including a forward/rearward extending barrel and a handle depending from said barrel; a motor supported in said barrel and having a rotatable shaft extending substantially axially forward along said barrel; a tool carrier located at the front end of said barrel and means for driving said tool carrier from said rotatable motor shaft; a cartridge having a rigid hollow circular cross section casing removably insertable in said barrel, said motor and driving means being precisely coaxially piloted in said cartridge casing for insertion as a part of said cartridge into said barrel, whereby said motor and driving means can be run for test purposes while in said cartridge casing and prior to installing the cartridge in said barrel, said motor and drive means being precisely located with respect to each other independent of, and without need to precisely form, the barrel. - View Dependent Claims (10, 11, 12, 13)
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14. A powered surgical handpiece comprising:
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a handpiece housing; means in the housing for imparting a desired movement to a tool; a trigger unit mounted in the housing and having a trigger member movable by the finger of the user of the handpiece, the trigger unit comprising; on/off switch means responsive to movement of said trigger member in a first direction for enabling motion of the tool; speed control means responsive to movement of said trigger member in said first direction for increasing the speed of movement of said tool, said on/off switch means and speed control means being arranged such that said on/off switch means assures disabling of all movement of said tool upon completion of movement of said trigger member in the opposite direction, even if said speed control means should fail to select a zero speed setting. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A pistol-shaped surgical handpiece, comprising:
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a pistol-shaped housing including a forward/rearward extending barrel and a handle depending from said barrel; a motor supported in said barrel and having a rotatable shaft extending substantially axially forward along said barrel; a tool carrier located at the front end of said barrel and means for driving said tool carrier from said rotatable motor shaft; a battery, said handle being hollow and open at the bottom, said battery being upwardly insertable into the open bottom of the handle; releasable latch means coactive between said handle and battery for positively retaining said battery in said handle, said latch means including first means permitting longitudinal sliding of said battery into said handle, second means responsive to complete seating of said battery in said handle for positively latching said battery in said handle, third means manually displaceable with respect to said handle for releasing said battery from said handle. - View Dependent Claims (22)
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Specification