Piezo ultrasonic and electrosurgical handpiece
First Claim
1. A piezo ultrasonic and electrosurgical handpiece comprising:
- a housing being elongated along its axis and having a distal end and a proximal end and a passage therethrough;
a piezo transducer having a plurality of elements supported within the housing and mounted along a plane generally transverse to the axis of the housing and the passage therealong;
a retainer for the piezo elements, the retainer having a distal portion, intermediate portion and a proximal portion, the distal portion having a fastener positioned near the distal end of the housing, the proximal portion having an extended mandrel in the form of a shoulder bolt with proximally disposed threads, the intermediate portion attached to the housing with provisions for locating the retainer axial with respect thereto with decoupling therebetween;
the piezo elements and a feedback crystal arranged in a stack of components, each component having a centrally located hole and an energy input and a reference output positioned axially apart from one another, the stack assembled on the shoulder bolt and positioned with the holes thereabout;
an insulating sleeve disposed about the shoulder and sandwiched between the central openings of the stack and the shoulder of the bolt;
a pair of insulators disposed about the retainer with the stack positioned between the insulators as a sandwich, one of the pair of insulators between the plane and the stack and the other insulator adjacent the threads and against the stack so an ultrasonic drive energy connected in circuit with the energy input of the elements, feedback signal and reference output in the stack are insulated by the sleeve and pair from the shoulder bolt;
a washer located against the insulator and about the threads in position to apply axial but not torsional loads on the insulator and stack therebeneath;
a clamping nut proximally located on the threads to hold the washer axially against the components on the shoulder bolt, the clamping nut including means for receiving an electrical source of electrosurgical energy, andelectrical connections to the stack isolated from the clamping nut, the electrical connections including means for driving piezo elements, for receiving current flow through the piezo elements and for transmitting signals from the feedback crystal to cause controlled axial reciprocatory motion to be transmitted to the distal end of the retainer for conveyance to the fastener thereat and the plane of the retainer arranged at a node point of the axial reciprocatory motion.
3 Assignments
0 Petitions
Accused Products
Abstract
An ultrasonic and electrosurgical handpiece housing has an axis, a distal end, a proximal end and a passage defined by an inside wall. A piezo stack has elements carried along a plane generally transverse to the axis. A retainer for the elements has distal, intermediate and proximal portions. The distal portion has a fastener; the proximal portion has a threaded shoulder bolt. The stack about the shoulder has an energy input and a reference output positioned axially apart from one another. An insulating sleeve about the bolt is between central openings of the elements and the bolt. A pair of insulators about the bolt has the stack therebetween; one insulator is between the plane and the stack and the other is near the threads. The intermediate portion attaches to the housing at the plane with decoupling and sealing. An irrigation channel conveys fluid. The drive energy input, the feedback signal and the reference outputs are insulated by the sleeve and pair from the bolt. A washer against the insulator and about the threads applies axial but not torsion to the insulator when a clamping nut on the threads holds components on the bolt. The clamping nut is in circuit with electrosurgical energy as the reference return for electrosurgery. A tool fastens to a connector for transmitting axial vibrations in the form of a predefined stroke at a tip thereof.
-
Citations
26 Claims
-
1. A piezo ultrasonic and electrosurgical handpiece comprising:
-
a housing being elongated along its axis and having a distal end and a proximal end and a passage therethrough; a piezo transducer having a plurality of elements supported within the housing and mounted along a plane generally transverse to the axis of the housing and the passage therealong; a retainer for the piezo elements, the retainer having a distal portion, intermediate portion and a proximal portion, the distal portion having a fastener positioned near the distal end of the housing, the proximal portion having an extended mandrel in the form of a shoulder bolt with proximally disposed threads, the intermediate portion attached to the housing with provisions for locating the retainer axial with respect thereto with decoupling therebetween; the piezo elements and a feedback crystal arranged in a stack of components, each component having a centrally located hole and an energy input and a reference output positioned axially apart from one another, the stack assembled on the shoulder bolt and positioned with the holes thereabout; an insulating sleeve disposed about the shoulder and sandwiched between the central openings of the stack and the shoulder of the bolt; a pair of insulators disposed about the retainer with the stack positioned between the insulators as a sandwich, one of the pair of insulators between the plane and the stack and the other insulator adjacent the threads and against the stack so an ultrasonic drive energy connected in circuit with the energy input of the elements, feedback signal and reference output in the stack are insulated by the sleeve and pair from the shoulder bolt; a washer located against the insulator and about the threads in position to apply axial but not torsional loads on the insulator and stack therebeneath; a clamping nut proximally located on the threads to hold the washer axially against the components on the shoulder bolt, the clamping nut including means for receiving an electrical source of electrosurgical energy, and electrical connections to the stack isolated from the clamping nut, the electrical connections including means for driving piezo elements, for receiving current flow through the piezo elements and for transmitting signals from the feedback crystal to cause controlled axial reciprocatory motion to be transmitted to the distal end of the retainer for conveyance to the fastener thereat and the plane of the retainer arranged at a node point of the axial reciprocatory motion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
9. The piezo ultrasonic and electrosurgical handpiece 1 wherein the juncture between the tool and the fastener is at an angle such that the axis of the passage through the retainer and an axis of the tool are at an obtuse angle.
-
19. A piezo ultrasonic and electrosurgical handpiece comprising:
-
a housing being elongated along its axis and having a distal end and a proximal end and a passage therethrough, the housing passage has an inside wall; a piezo transducer having a plurality of elements supported within the housing and mounted along a plane generally transverse to the axis of the housing and the passage therealong; a retainer for the piezo elements, the retainer having a distal portion, intermediate portion and a proximal portion, the distal portion having a fastener positioned near the distal end of the housing, the proximal portion having an extended mandrel in the form of a shoulder bolt with proximally disposed threads, the intermediate portion attached to the housing with provisions for locating the retainer axial with respect thereto with decoupling therebetween, the retainer includes sealing provisions with respect to the inside wall of the housing; an irrigation channel within the housing and segregated from the stack for conveying irrigation fluid at the distal end of the housing; the piezo elements and a feedback crystal arranged in a stack of components, each component having a centrally located hole and an energy input and a reference output positioned axially apart from one another, the stack assembled on the shoulder bolt and positioned with the holes thereabout; an insulating sleeve disposed about the shoulder and sandwiched between the central openings of the stack and the shoulder of the bolt; a pair of insulators disposed about the retainer with the stack positioned between the insulators as a sandwich, one of the pair of insulators between the plane and the stack and the other insulator adjacent the threads and against the stack so an ultrasonic drive energy connected in circuit with the energy input of the elements, feedback signal and reference output in the stack are insulated by the sleeve and pair from the shoulder bolt; a washer located against the insulator and about the threads in position to apply axial but not torsional loads on the insulator and stack therebeneath; a clamping nut proximally located on the threads to hold the washer axially against the components on the shoulder bolt, the clamping nut including means for receiving an electrical source of electrosurgical energy, and electrical connections to the stack, the electrical connections including means for driving piezo elements, for receiving current flow through the piezo elements and for transmitting signals from the feedback crystal to cause controlled axial reciprocatory motion to be transmitted to the distal end of the retainer for conveyance to the fastener thereat and the plane of the retainer arranged at a node point of the axial reciprocatory motion and a tool is connected to the fastener with complimentary connector and is held thereto for transmitting axial vibrations in the form of a predefined stroke therealong to a tip thereof, the fastener connects to a hollow tubular tool and having a bore therethrough located along an axis thereof, the bore in fluid communication with an axial passageway through the retainer having a passageway therethrough allowing fluid flow to pass without fluid communicating with the electrical connections or the stack. - View Dependent Claims (20, 21, 23, 24, 25, 26)
-
-
22. The piezo ultrasonic and electrosurgical handpiece 19 wherein the juncture between the tool and the fastener is at an angle such that the axis of the passage through the retainer and an axis of the tool are at an obtuse angle.
Specification