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Publication numberUS2617186 A
Publication typeGrant
Publication dateNov 11, 1952
Filing dateApr 18, 1947
Priority dateApr 18, 1947
Publication numberUS 2617186 A, US 2617186A, US-A-2617186, US2617186 A, US2617186A
InventorsPickles Joseph A
Original AssigneeClarence T Barton
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cast cutter
US 2617186 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Nov. 11, 1952 J. A. PICKLES CAST CUTTER Filed April 18, 1947 Patented Nov. 11, 1952 CAST CUTTER Joseph A. Pickles, Sanford, Maine, assignor of forty per cent Maine to Clarence T. Barton, Kittery,

Application April 18, 1947, Serial No. 742,364 1 Claim. (01. 30-444) This invention relates to improvements to power driven cutters for cutting and removing surgical casts and the like from body members, and one of the primary objects of this invention is to provide a device for these purposes which while quickly and efiiciently cutting the cast or other bandage substantially eliminates hurting and injuring the patient.

Another important object of this invention is to provide a device of the character indicated which combines means for the rapid and complete sawing through of the cast or the like, with means for positively preventing contact of the sawing means with the person of the patient from whose body the cast or the like is removed, and with means capable of accurate adjustment to predetermine the clearance of the sawing means from the means preventing contact of the sawing means with the person of the patient.

A further important object of this invention is the provision of a device of the character indicated above which substantially expedites and renders more easy and efficient the removal of plaster casts and like surgical splints or bandages, so as to materially reduce the expenditure of time, physical effort, and skill ordinarily required.

Other important objects and advantages of this invention will be apparent from the following detailed description and the accompanying drawings, wherein merely for purposes of disclosure,

a presently preferred embodiment as set forth.

In the drawings:

Figure 1 is a right hand side elevation of said embodiment partly broken away to show internal structure and showing certain internal parts in dotted lines.

Figure 2 is a bottom plan view.

Figure 3 is a. transverse vertical section taken on the line 3-3 of Figure 1, and,

Figure 4 is a front perspective view of the shoe or slide.

Referring in detail to the drawings, the said embodiment of the invention comprises a pistolgrip type of handle 5, including a switch button 6, attached to the rear end of a generally cylindrical housing 1, in the general manner of electric hand-drill construction, the housing 1 containing an electric motor 8 whose removable brush holders 9 are positioned around the armature and commutator IE1 at the rear end of the housing as shown in Figure l, with the armature shaft terminating at its forward end in a worm shaft H, which extends forwardly beyond the motor case 12 into a preferably hemispherical removable housing portion I3 on the forward end of the housing 1.

The housing portion [3, which is provided on its top with a removal plate It for its inspection and lubricating opening 15, has pairsof upper and lower shaft bearings l6 and [1, respectively, on the opposite sides of its interior. An idler shaft 18 is journaled at its ends in the upper bearings H5 and has fixed thereon a wormwheel l9 meshed with the wormshaft I I and a pinion 28.

A saw shaft 2! is journaled in the lower bearings l1 and has a fixed gear 22 meshed with the idler shaft pinion 29. The saw shaft 2| extends through the right hand side of the housing portion l3 and has secured thereto a circular saw '23 arranged to turn in the clockwise direction, as indicated by the arrow in Figure 1, with its teeth slanted in the same direction. The upper twothirds of the saw 23 is enclosed by a guard 24 which is removably connected at 25 to the adjacent side of the-housing 1.

On the side of the housing 1 opposite the saw are plate-like legs 26, preferably having notches on their inner sides to cooperate with notches provided on longitudinally spaced bosses 21, the bosses having pairs of upper and lower studs 28 passing through slots, not shown in the legs 26, wing nuts 30 being provided thereon for tightening the legs in place after vertical adjustment thereof so that rollers 3| on the lower ends of the legs are at a proper height with reference to the lower edge of the saw 23 to roll upon the top or outside of the cast or the like while the same is being cut with the saw 23. As shown in Figure 3, the rollers 31 are positioned at the inboard side of the legs 25. The rollers substantially prevent lateral as well as endwise overbalancing and canting of the device in operation and assist in the control of depth of cut of the saw and the pressure upon the patient.

The slide or shoe 32 is in the form of an elongated stiif spring-steel strip of relatively narrow width, having its opposite ends upturned as indicated at 33 to prevent digging of the shoe into the skin of the patient as the shoe is moved in either direction between the cast 34 and the patients skin 35, as shown in Figures 1 and 2. From the rear third of the shoe rise two bifurcated standards 35 and 31, respectively, between the legs of which can be wedged triangular cutters 38 operating to out and separate the-material of the cast or the like next to the patients flesh which may not be entirely severed by the passage of the saw 23 in either direction therethrough.

The standards 33 and 31 have their side edges bevelled, as indicated at 39, to slidably conform with bevelled slideways 39 provided on the exterior of the housing 1 behind the saw, in which slideways the standards may be locked in desired vertical adjustment by means of setscrews All. The standards are so adjusted that the shoe always clears the lower edge of the saw 23 In operation, the forward end of the shoe is pushed under the cast, and the proper adjustment of the rollers 31 having been made for the thickness of the cast, the saw is engaged with the cast and the motor 8 turned on by means of the switch button 6, whereupon the device is moved forwardly so as to cut through the cast as desired.

Various modifications and changes are contemplated and may obviously be resorted to without departing from the spirit and scope of the invention as hereinafter defined by the appended claim.


A cast cutter comprising a handle-equipped casing, a motor within said casing having a shaft, a transverse saw shaft in said casing and extending through one side thereof, a circular saw on the saw shaft at one side of said casing, means operatively connecting said saw shaft and said motor shaft Within the casing, a pair of vertical arms adjustably afiixed to that side of the casing opposite to the saw, a roller revolubly mounted at the lower end of each of said arms and adapted to engage the exterior of a cast and to support the cast cutter against tipping, a saw guard affixed to the casing and encompassing a major portion of said saw, said casing having a pair of spaced parallel slideways formed in that side thereof immediately rearwardly of said guard, a standard vertically adjustable in each of said slideways, means for locking said standards in selected positions in said slideways, a yoke formed at the lower end of each of said standards, an elongated shoe extending beneath said standards and said saw, said saw having upturned ends, a pair of triangular blades each having its base portion affixed to said shoe and each having cutting edges extending in a direction parallel to the longitudinal axis of the casing, and means for affixing each of said b ades in one of said yokes.


REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 576,610 Pohlsen Feb. 9, 1897 1,716,662 Pedley June 11, 1929 1,737,552 Altman et al. Dec. 3, 1929 2,352,432 Harrington June 27, 1944 2,367,432 Reprogle Jan. 16, 1945 all

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US576610 *Jul 6, 1896Feb 9, 1897 Island
US1716662 *Nov 29, 1926Jun 11, 1929 Rotary hand tool fob cutting plaster casts
US1737552 *May 7, 1929Dec 3, 1929Altman Russell DDevice for removing plaster-of-paris casts from the human body
US2352432 *Aug 18, 1943Jun 27, 1944Harrington Michael FSurgical cast cutter
US2367432 *Apr 28, 1941Jan 16, 1945Frank ReprogleSurgical saw
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2805611 *May 28, 1951Sep 10, 1957Fletchall Cleo LPower driven hand cultivator
US3091851 *May 28, 1962Jun 4, 1963Thomas B DempseyCast cutter
US3353266 *Jan 19, 1966Nov 21, 1967Bertha GoolsbyAttachment for a cast cutter
US3574939 *Oct 14, 1968Apr 13, 1971Monsanto CoSafety guard for carpet cutter
US4081906 *Apr 28, 1977Apr 4, 1978Alpha Nova Development CorporationCast cutter
US4517872 *Jun 30, 1983May 21, 1985The Boeing CompanyControlled depth cutting method and apparatus
US4827617 *Dec 7, 1987May 9, 1989Shepherd David JTree cutting guide shoe for clearing saw
US5653033 *Aug 28, 1995Aug 5, 1997Mcdowell; Tommy M.Rechargeable universal drywall cutter
US6363617 *Apr 7, 2000Apr 2, 2002Terry FrostGuard for cast cutter
US6606930Jun 7, 2001Aug 19, 2003Samuel Mitchell FasnachtSaw cutting guide
US7465328Jul 22, 2005Dec 16, 2008Black & Decker Inc.Dust collector for a power tool
US9009982 *Mar 28, 2013Apr 21, 2015Simon J. SedgwickDustless drywall cutting tool
US9126349 *Feb 12, 2008Sep 8, 2015California Industrial Rubber Co., Inc.Apparatus for severing a workpiece
US9168188Nov 13, 2008Oct 27, 2015Orthopediatrics CorporationCast removal system
US20040035274 *Jun 12, 2003Feb 26, 2004Samuel FasnachtSaw cutting guide
US20070017191 *Jul 22, 2005Jan 25, 2007Miller Philip TDust collector for a power tool
US20090199688 *Feb 12, 2008Aug 13, 2009Strong Gile MApparatus for severing a workpiece
US20090272242 *Jul 14, 2006Nov 5, 2009Ryobi Ltd.Cutting machine
US20100024223 *Jul 29, 2008Feb 4, 2010Jonathan LehmanCast saw
US20120042524 *Feb 11, 2010Feb 23, 2012Deeter Nick ACast removal device
US20130318800 *Jun 4, 2012Dec 5, 2013Ronald D. WeissSingle-handed, electric ring cutter
DE9105095U1 *Apr 25, 1991Oct 17, 1991Schimpff, Udo, 6115 Muenster, DeTitle not available
U.S. Classification30/144, 30/370, 30/292, 30/276, 30/390, 30/287
International ClassificationA61F15/00, A61F15/02
Cooperative ClassificationA61F15/02
European ClassificationA61F15/02