US 5,888,200 AGranted

Multi-purpose surgical tool system

AssigneeStryker Corporation

InventorJames G. Walen

Life of this patent

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Abstract

A surgical tool system (20) with replaceable surgical cutting accessories (26) and attachments (34) for holding the tools. This system includes a handpiece (22) to which the cutting accessory and attachment are releasably attached. Collet (50) located inside a drill housing (44) located at one end of the handpiece securely fastens the surgical tool to a motor (24) also located in the handpiece. Leaf spring assembly (46) flush with the drill housing releasably secures the attachment in place. A single actuating collar (52) located around the outside of the drill housing both controls the locking force supplied by the collet and selectively relaxes the leaf spring assembly.

Claims26

Dependent claims

A surgical handpiece adapted for use with a replaceable cutting accessory, the cutting accessory having a shaft, said handpiece comprising:

an outer shell;
a motor disposed in said outer shell, said motor having a rotating shaft;
a coupling assembly attached to said outer shell and fitted to said motor, said coupling assembly including:
a housing coupled to said rotating shaft of said motor to rotate with said shaft, said housing having an axially extending shaft bore for receiving the shaft of the cutting accessory, and said housing shaped to form at least one opening that extends into said shaft bore;
a locking member positioned adjacent each said opening in said housing for selective positioning in said shaft bore of said housing so that when said locking member is positioned in said shaft bore of said housing, said locking member holds the shaft of the cutting accessory for rotation with said shaft of said motor and when said locking member is spaced from said shaft bore, the shaft of the cutting accessory is removable from said shaft bore of said housing;
a lock ring disposed around said housing and displaceable along said housing from a first position wherein said lock ring abuts said locking member so as to latch said locking member into said shaft bore of said housing and a second position wherein said lock ring is spaced from said locking member;
a biasing member that normally urges said lock ring into said lock ring first position;
a lock ring actuator disposed around said lock ring for selectively abutting said lock ring to move said lock ring from said lock ring first position to said lock ring second position;
and
a displaceable actuating member that is fitted over said outer shell and coupled to said lock ring actuator, said actuating member being movable between a run position and an accessory load position, wherein when said actuating member is moved from said run position to said accessory load position, said actuating member causes said lock ring actuator to abut said lock ring so as to cause said lock ring to move to said lock ring second position and said actuating member remains in said accessory load position until displaced from said accessory load position.

7 more elements

A surgical handpiece adapted to receive a shaft of a cutting accessory and an attachment head, wherein the shaft of the cutting accessory extends from the attachment head, said handpiece comprising:

an elongated outer shell having an open front end;
a motor disposed in said outer shell, said motor having a rotating shaft oriented towards said front end of said outer shell;
a drill housing fitted over said open front end of said outer shell, said drill housing having a center opening for receiving the shaft of the cutting accessory and being dimensioned to be fitted into the attachment head;
an attachment locking assembly attached to said drill housing, said attachment locking assembly having at least one locking foot that extends outwardly from said drill housing, said at least one locking foot having a first, locking position wherein said at least one locking foot engages the attachment head so as to secure the attachment head to said drill housing and a second, release position wherein said locking foot is spaced from said attachment head so as to allow the removal of the attachment head from said drill housing;
a shaft coupling assembly disposed in said outer shell and connected to said shaft of said motor for securing the cutting accessory shaft to the shaft of said motor for rotation therewith, said shaft coupling assembly having a first, run state wherein the cutting accessory shaft is secured to said shaft of said motor and a second, load state wherein said cutting accessory shaft can be removed from said shaft coupling assembly;
and
a single, manually controlled actuating member connected to said attachment locking assembly and said shaft coupling assembly for controlling the states of said attachment locking assembly and of said shaft coupling assembly, wherein said actuating member is movable between a first position in which said at least one locking foot of said attachment locking assembly is in said locking position and said coupling assembly is in said run state, a second position in which said at least one locking foot of said attachment locking assembly remains in said locking position while said shaft coupling assembly transitions to said load state and a third position wherein said at least one locking foot of said attachment locking assembly transitions to said release position.

4 more elements

A surgical tool system comprising:

a cutting accessory;
an attachment having an attachment housing for releasably receiving said cutting accessory;
a rotating shaft that extends from said attachment housing, said rotating shaft being coupled to the cutting accessory for transferring rotational power thereto;
and
a handpiece to which said attachment and said rotating shaft are releasably secured, said handpiece including:
an outer shell;
a motor disposed in said outer shell, said motor having a rotating rotor;
a shaft coupling assembly attached said rotor of said motor, said shaft coupling assembly being configured to releasably secure said rotating shaft thereto for rotation with said rotor;
an attachment locking assembly secured to said outer shell, said attachment locking assembly being configured to hold said attachment locking assembly thereto in a static position and including a selectively displaceable lock member for engaging said attachment housing so as to hold said attachment to said attachment to said handpiece;
and
an actuating collar rotatably secured to said outer shell of handpiece, said attachment collar being connected to said coupling assembly and said attachment locking assembly whereby when said attachment collar is moved from a first position to a second position, said attachment collar causes said coupling assembly to release said rotating shaft and when said attachment collar is moved from said second position to a third position, said attachment collar causes said locking member of said attachment locking assembly to disengage from said attachment housing.

8 more elements

Dependencies are inferred from the claim text.

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Abstract

A surgical handpiece adapted for use with a replaceable cutting accessory, the cutting accessory having a shaft, said handpiece comprising:

an outer shell;
a motor disposed in said outer shell, said motor having a rotating shaft;
a coupling assembly attached to said outer shell and fitted to said motor, said coupling assembly including:
a housing coupled to said rotating shaft of said motor to rotate with said shaft, said housing having an axially extending shaft bore for receiving the shaft of the cutting accessory, and said housing shaped to form at least one opening that extends into said shaft bore;
a locking member positioned adjacent each said opening in said housing for selective positioning in said shaft bore of said housing so that when said locking member is positioned in said shaft bore of said housing, said locking member holds the shaft of the cutting accessory for rotation with said shaft of said motor and when said locking member is spaced from said shaft bore, the shaft of the cutting accessory is removable from said shaft bore of said housing;
a lock ring disposed around said housing and displaceable along said housing from a first position wherein said lock ring abuts said locking member so as to latch said locking member into said shaft bore of said housing and a second position wherein said lock ring is spaced from said locking member;
a biasing member that normally urges said lock ring into said lock ring first position;
a lock ring actuator disposed around said lock ring for selectively abutting said lock ring to move said lock ring from said lock ring first position to said lock ring second position;
and
a displaceable actuating member that is fitted over said outer shell and coupled to said lock ring actuator, said actuating member being movable between a run position and an accessory load position, wherein when said actuating member is moved from said run position to said accessory load position, said actuating member causes said lock ring actuator to abut said lock ring so as to cause said lock ring to move to said lock ring second position and said actuating member remains in said accessory load position until displaced from said accessory load position.

7 more elements