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Número de publicaciónUS2698034 A
Tipo de publicaciónConcesión
Fecha de publicación28 Dic 1954
Fecha de presentación20 Feb 1950
Fecha de prioridad20 Feb 1950
Número de publicaciónUS 2698034 A, US 2698034A, US-A-2698034, US2698034 A, US2698034A
InventoresJakku Eino A
Cesionario originalJakku Eino A
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Portable chain saw with detachable guards
US 2698034 A
Resumen  disponible en
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Reclamaciones  disponible en
Descripción  (El texto procesado por OCR puede contener errores)

1954 E. A. JAKKU 2,698,034


Application February 20, 1950, Serial No. 145,151

1 Claim. (Cl. 143-32) The primary object of this invention is. to adapt a chain saw to the pruning of trees, cutting of branches and the like.

I have found that by locating guards on the blade or frame of a chain saw over which the cutting chain is trained at intervals throughout its length, the said bars extending on either side of the chain and beyond both edges of the frame a sufficient distance to embrace the limbs of trees, that a chain saw will work very effectively in the trimming of trees, as well as cutting branches.

My new and improved pruning saw is adapted to either internal combustion engines, electric or air power driven saws.

These and other incidental objects will be apparent in the drawings, specification and claim.

Referring to the drawings:

Figure 1 is a perspective view of a conventional type of internal combustion engine driven chain saw having my new and improved cutting guards mounted thereto.

Figure 2 is a fragmentary detail enlarged view of the frame, partially broken away illustrating the cutting chain in relation to my new and improved guards, showing how the guard holds the limb of the tree while being cut.

Figure 3 is an enlarged detail sectional view of the frame cutting chain illustrating the guards mounted thereon, this view being taken on line 3-3 of Figure 1.

Figure 4 illustrates my new and improved guards mounted to the frame of an electric driven chain saw.

Figure 5 illustrates how the saw assembly may be supported on a counterbalanced supported mounted on the bed of a truck.

Referring more specifically to the drawings:

In Figure 1, I have illustrated a conventional type of internal combustion engine 1, having the chain saw frame 2 secured thereto in the usual manner. The cutting chain is indicated at 3 mounted to the frame 2 and driven by the motor 1 by a sprocket not here shown, but which is of well known practice.

My invention consists of mounting the guards 4 to the frame 2 by any suitable means, as for instance the bolts 5. These guards may fit directly against the frame or they may be spaced therefrom by spacers not here shown, depending upon the width of the chain saw 3. The guards 4 extend outwardly on either side of the frame and beyond both edges of the frame and the cutting chain 3 mounted thereon. The guards may be spaced apart at any desired distance, depending upon the type of work to be performed by the saw on which they are mounted.

In the operation of the saw, referring to Figures 1, 2,

3 and 5, the frame is lowered over the limb 6 to be cut, the chain operating in the direction of the arrow will cause the limb 6 to move towards the guard 7 which will hold the said limb while the teeth 8 of the saw 3 cut through the said branch or limb.

Referring to Figure 5, I have found that supporting the chain saw assembly by the chain or cable 9, that it is much easier to operate the same around the tree. The lower end of the chain terminates in a clevice 10, which may have a roller 11 mounted therein and adapted to be mounted to the rectangular pipe 12 forming part of the motor unit. In this particular motor this pipe forms part of the motor in that it provides the oil reservoir for the motor. In motors not having this oil reservoir, a ring to take the place of the same may be mounted to the motor.

In the operation of the saw it can be readily understood how the same can be operated as illustrated in a vertical plane, or it can be rolled over on its side, the roller 11 rolling within the rectangular pipe 12 supporting the entire unit with ease.

The upper end of the chain 9 is fixedly secured to the end 13 of the boom 14. The boom 14 is pivotally mounted at 15 to the tripod 16. A counterbalancing weight 17 is mounted to the opposite end of the boom 14 and is so adjusted to balance the load of the chain saw assembly.

The internal combustion engine type of chain saw is admirably adapted to be used in connection with the tripod arrangement or for cutting of heavy limbs, while the electrical driven unit illustrated in Figure 4 is admirably adapted for the cutting of smaller limbs and not requiring a counterbalancing support.

I do not wish to be limited to the type of power applied to the saw, as my invention really consists in the mounting of the guards 4 to the cutting blade of the saw, so that the chain saw 3 can be used to cut the limbs of trees or brush by simply forcing the chain of the saw against the same.

What I claim is:

A portable saw comprising an elongated flat frame formed at one end with a motor support, a chain saw trained about the periphery of said frame, and a plurality of adjustable guard members longitudinally spaced along the axis of the frame and detachably secured to said frame, each member extending beyond either side of the frame and beyond the edges thereof, each of said members presenting a pair of work engaging surfaces one on either side of the frame and extending substantially perpendicularly beyond the chain, the opposed work engaging surfaces of adjacent members being substantially parallel to receive a work piece therebetween.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 741,874 Barnes Oct. 20, 1903 1,723,125 Bens Aug. 6, 1929 1,946,390 Christiansen Feb. 6, 1934 2,034,058 Sacrey Mar. 17, 1936 2,216,971 Farmer Oct. 8, 1940 2,327,233 Wolf Aug. 17, 1943 2,488,343 Standal Nov. 15, 1949 2,567,886 Mall et al Sept. 11, 1951

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US741874 *26 May 190220 Oct 1903John W BarnesMowing-machine.
US1723125 *26 Ene 19276 Ago 1929Chain Saw CorpPower-driven chain-saw assembly
US1946390 *16 Jul 19326 Feb 1934Merritt Chapman And Scott CorpPortable sawing mechanism and method of use
US2034058 *22 May 193317 Mar 1936Syracuse Toolectric Mfg CorpImplement for trimming hedges and the like
US2216971 *10 May 19378 Oct 1940Farmer Joseph SPortable circular saw
US2327233 *9 Abr 194017 Ago 1943Charles WolfTimber saw
US2488343 *30 Jul 194515 Nov 1949Standal Stanley E MChain saw
US2567886 *18 Sep 194411 Sep 1951Mall Tool CompanyAdjustable bumper attachment for chain saws
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US2797717 *3 Mar 19552 Jul 1957Textron IncChain saw for cutting brush and small trees
US2813556 *29 Sep 195319 Nov 1957Mcculloch Motors CorpChain saw with spiked reaction attachment
US2832136 *16 Feb 195429 Abr 1958Trecker Francis JChain saw
US2924267 *29 Mar 19549 Feb 1960Micro Machinery Products IncMachine for slitting tires
US2980374 *18 Ago 195818 Abr 1961Loyd YoungResilient support for chain saws
US3158932 *1 Ago 19621 Dic 1964Brewer Ivo HMultiple cutter shaver having continuous shaving surface
US3186087 *8 May 19631 Jun 1965Samuel KahnElectric shaver having a motor driven endless chain of links each having a pluralityof blade elements
US3236036 *7 Mar 196222 Feb 1966Northwestern Motor CompanyChain saws
US3237388 *2 Abr 19651 Mar 1966Northwestern Motor CompanyBrush cutting chain saw
US3246460 *25 Abr 196319 Abr 1966Fmc CorpPruning machine
US3815229 *9 Oct 197011 Jun 1974Granberg EHedge trimmer attachment for a chain saw
US3931676 *11 Feb 197413 Ene 1976Merle William EPortable power saw apparatus
US4142292 *16 Ene 19786 Mar 1979Ray R. Ulrich, Sr.Chain saw adapter for use particularly for trimming hedges and cutting brush
US4270272 *25 Ene 19802 Jun 1981Graham William WBrush cutting attachment for chain saw
US4317285 *26 Mar 19812 Mar 1982Graham William WBrush cutting attachment for chain saw
US4833781 *5 Ago 198830 May 1989Victor OxentenkoAdjustable depth gauge for chain saws
US4858325 *2 Jul 198722 Ago 1989Miller Edward AChain saw and guide
US5560111 *29 Sep 19951 Oct 1996Dofredo; Nestor V.Chain saw attachment for use in trimming shrubbery
US5669145 *15 Abr 199623 Sep 1997Skripsky; Harold O.Chainsaw attachment
US5671537 *1 Oct 199630 Sep 1997Dofredo; Nestor V.Chain saw attachment for use in trimming shrubbery
US5878499 *8 May 19979 Mar 1999King; PatTrimmer bar for a chain saw
US6536119 *29 Jun 200125 Mar 2003Alvin W. CarrHedge cutting system
US792618718 Feb 200519 Abr 2011Milwaukee Electric Tool CorporationBand saw
US8156654 *11 Ene 201017 Abr 2012Reed Thomas BChain saw attachment for unobstructed brush cutting
US20050188550 *18 Feb 20051 Sep 2005Nancy Uehlein-ProctorBand saw
US20060218796 *14 Mar 20065 Oct 2006Andreas Stihl Ag & Co. KgCutter Bar of a Motor-Operated Hedge Trimmer
US20090134191 *26 Nov 200828 May 2009Michael PhillipsPower tool with hook
US20110167649 *11 Ene 201014 Jul 2011Reed Thomas BChain Saw Attachment for Unobstructed Brush Cutting
US20130031793 *21 Jul 20107 Feb 2013Anthony BarattaChain bar apparatus and methods and tool combinations and methods of making and using moving tool combinations
EP0652081A1 *8 Nov 199310 May 1995Peter J.D. BaileyTool extension attachment
Clasificación de EE.UU.30/371, 83/794, 30/296.1, 30/206
Clasificación internacionalB27B17/00
Clasificación cooperativaB27B17/0083, B27B17/0008
Clasificación europeaB27B17/00B, B27B17/00G