 Orthotic foot assist apparatus |
| In accordance with the present invention, there is provided an apparatus for assisting a person ... |
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| Valves |
| I claim: 1. A valve for directing flow of breath to and from a patient, having a first port adapted ... |
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| Patient ventilators |
| I claim: 1. A delivery tube array for a patient ventilator usable for delivering a compression ... |
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| Nasal inhalation system |
| In accordance with the invention, an improved nasal inhalation system is provided for quickly and ... |
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| Programmer for implanted pacer |
| According to the invention we provide an external programmer for supplying a fixed number of pulse-... |
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| Adjustable apparatus for removing surface portions of human tissue |
| The object of the present invention is to provide for the removal of surface layers of human tissue ... |
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| Device for facilitating knot tying |
| The subject device facilitates tying knots and, in the preferred embodiment, is made of flat, stiff ... |
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| Implantable unipolar pacemaker with improved outer electrode plate |
| It is a primary object of the present invention to provide a new implantable unipolar pacemaker in ... |
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| Endoscopic biopsy forceps handle with removable sample removal pick |
| It is therefore an object of the invention to provide an endoscopic biopsy forceps instrument ... |
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| Method and apparatus for permanent removal of multiple hairs with hair clamping springs |
| Accordingly, it is an object of the invention to provide a multiple hair removal method and ... |
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Surgical cutting device
| Details |
Inventors: Morrison, Marshal;
Assignee: Stryker Corporation (Comstock Township, Kalamazoo County, MI)
Primary Examiner: Pace; Channing L.
Assistant Examiner:
Attorney, Agent or Firm: Woodhams, Blanchard and Flynn
A surgical cutting device, particularly a sagittal saw, having an elongated tubular housing containing therein a driving mechamism which extends outwardly from one end of the housing and has a saw blade mounted thereon. A driving connection, such as a flexible drive cable or the like, extends into the other end of the housing and is drivingly connected to the driving mechanism. The driving mechanism includes a crank structure connected between a rotatable input shaft and one end of a blade mounting member, which member has the saw blade mounted on the other end thereof. A pivot structure coacts with the blade holding member for permitting angular oscillation of the blade holding member while also simultaneously permitting the blade holding member to be reciprocated in the longitudinal direction thereof. The crank structure causes the blade holding member to be simultaneously angularly oscillated and linearly reciprocated, whereby the blade is cyclically moved around a substantially elliptical path. |
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DETAILED DESCRIPTION FIGS.
1-3 illustrate therein a preferred embodiment of a surgical cutting device 11, particularly a sagittal saw, constructed according to the present invention.
The cutting device 11 includes a handpiece 12 having a driving mechanism 13 housed therein.
A toothed cutting blade 14 projects outwardly from the forward end of the handpiece 12.
The handpiece 12 comprises an elongated tubular housing 16 having a removable cover 17 associated therewith, which cover is of substantially semicylindrical configuration and is fixed to the housing 16 by a plurality of fastening devices, such as screws 18.
The housing 16 has an elongated opening 19 extending therethrough.
An input shaft 21 is disposed within one end of the housing 16 and is rotatably supported thereon by antifriction bearings 22.
The input shaft 21 has a drive coupling 23 on the input end thereof, which coupling is adapted to be releasably connected to a conventional drive device, such as a rotatable flexible drive cable associated with an external power source, or a pneumatic or electric motor.
The driving mechanism 13 is disposed within the opening 19 and is driven by the input shaft 21.
For this purpose, shaft 21 has a drive gear 24 on the forward end thereof, which gear 24 is nonrotatably connected to the shaft 21, as by a key 26, and is disposed in meshing engagement with a crown gear 27.
Gear 27 is rotatably supported on the housing by an antifriction bearing 28 and is nonrotatably coupled to a drive shaft 29 by a key 31.
The upper end of shaft 29 is rotatably supported by a further antifriction bearing 32 which is mounted on the cover 17.
The rotational axis of the shaft 29 is substantially perpendicular to the rotational axis of the input shaft 21 as illustrated in FIG.
2.
The driving mechanism 13 has a crank structure 35 associated therewith and disposed in driving engagement with the rearward end of an elongated blade holding member 36.
The crank structure 35 includes a crank or eccentric 33 fixedly secured to the drive shaft 29 and is rotatably but snugly received within an opening 34 formed adjacent the rearward end of the blade holding member 36
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