US2558459A - Hedge trimmer with sectioned housing - Google Patents

Description

June 26, 1951 J. PODNER 2,558,459

HEDGE TRIMMER WITH SECTIONED HOUSING Filed April 18, 1947 2 Sheets-Sheet 1 In rentor Joseph Podner June 26, 1951 J. PODNER HEDGE TRIMMER WITH SECTIONED HOUSING 2 Sheets-Sheet 2 Filed April 18, 1947 m w \@W.. m m -r=ih: v H m W .Om A w .a w m w wv nwmv R mm mm on\\ M w n I I 1 y L vv E B 9 mm m .E 9 2 hm Emu Sew Nu ow N D R v 3. B n l l 2 E IN H.-- km. on ,I I 5 mm a w mm 2 mm mm 2 Patented June 26, 1951 HEDGE TRIMMER WITH SECTIONED HOUSING Joseph Podner, Hastings, Minn.I assignor oi twenty per cent to Kermit A. Larson, St. Louis Park, Minn.

Application April 18, 1947, Serial No. 742,357

2 Claims. (Cl. 30-218) This invention relates to new and useful improvements and structural refinements in power clippers, more specifically, remotely actuated portable clippers, and the principal object of the invention is to provide a device of the character herein described, which may be conveniently and effectively employed for the trimming of trees, shrubs, hedges, and the like.

A further object of the invention is to provide a power clipper which embodies in its construction a cutting head operatively connected by means of a length of flexible cable to a relatively stationary actuating motor, so that the manipulation of the cutting head may be easily and conveniently undertaken, even in poorly accessible locations.

Another object of the invention is to provide a power clipper which is simple in construction, which may be easily sharpened even by unskilled persons, and which is otherwise well adapted for the various purposes for which it may be used.

With the above more important objects in view, and such other objects as may become apparent as this specification proceeds, the invention consists essentially of the arrangement and construction of parts as illustrated in the accompanying drawings, in which:

Figure l is a perspective view of the invention;

Figure 2 is a cross sectional view, taken sub stantially in the plane of the line 2-2 in Fig-- ure 1;

Figure 3 is a cross sectional View, taken sub stantially in the plane of the line 3-3 in Figure 1;

Figure 4 is a fragmentary underside plan view of the cutting blade used in the invention;

Figure 5 is a cross sectional view, taken substantially in the plane of the line 5-5 in Figure 4;

Figure 6 is an edge view, taken in the direction of the arrow 6 in Figure l;

Figure 7 is a perspective View of a cam cylinder used in the invention, and

Figure 8 is an elevational view of a blade sharpening attachment, such as may be employed in. association with the invention.

Like characters of reference are used to designate like parts in the specification and through out the several views.

Referring now to the accompanying drawings in detail, the invention consists of a power clipper designated generally by the reference character [0, the same embodying in its construction an elongated carrier housing H which is composed of a plurality of longitudinally aligned, comp1ementary sections l2, l3 and [4.

These sections are separably connected together by means of a stationary cutter blade If, the latter being removably attached to the housing sections by a plurality of suitable bolts Hi, Ii.

A reciprocable cutting blade I8 is positioned adjacent the stationary blade 15 and, is slidably attached thereto by means of a. plurality of guide screws it. These screws are equippe with enlarged heads 2|] and with diametrically reduced shoulders 2! disposed immediately adjacent the heads, the heads 20 being disposed in elongated, counterbored slots 22 formed in the blade l8, while the shoulders 21 are tightened against the adjacent surface of the blade l5. It will be apparent that in this manner, the screws it per-- form a double function, namely, that of attaching the blade I8 to the blade l5 and guiding the reciprocating movement of the former.

The housing sections [3, 14 are equipped with a pair of bearing blocks 23 which, in turn, accommodate a rotatable shaft 24. A cylindrical drum 25 is secured to the shaft 24 and is provided in the lateral surface thereof with a continuous cam groove 26, as will be clearly apparent from the accompanying drawings.

A follower screw 21 engages a screw threaded aperture 28 formed in the blade [8 and extends through a slot 29 provided in the blade i5, so that the inner end thereof may function as a seat for a ball 30 which is urged in engagement with the groove 26 by the screw (21).

Accordingly, it will be observed that rotation of the shaft 24 will reciprocate the blade 18 by virtue of the cam groove and follower structure described.

The housing section l2 provides a receptacle, as it were, for one end portion of a flexible casing 3| which accommodates a rotatable, flexible cable 32. This cable projects into a chamber 33 formed in the housing section II and. carries a coupling 34 which is removably secured to the cable by means of a set screw 35. This set screw is accessible through an aperture 36 formed in the housing section I2, and the coupling 34 is also equipped with a further set screw 31, whereby it may be secured to the adjacent end portion of the aforementioned shaft 24. If desired, the latter may be provided with a suitable, longitudinally extending bore so as to accommodate the adjacent end portion of the cable 32.

It wil1 be apparent from the foregoing that the cable and easing 3|, 32 may be readily disconnected irom the housing II by simply loosening the set screw 35 and removing the screws I6, I I whereupon the housing sections I 3; It may be readily separated from the section I2.

The remaining end portion 'of the cable 32 is provided with a further coupling 38 which is secured thereto by means of a, .set screw 39, the coupling 38 being, in turn, equipped with a shear pin 40 which also passes through the drive shaft 4] of a suitable gasoline or electric motor 42. The coupling 38 is enclosed by a tubular sleeve 43, the latter being formed with a'pair of diametrically opposed bayonet slots 44. These slots accommodate a pair of diametrically opposed pins 45 provided on the coupling 38, and it will be noted that by simply rotating and sliding the sleeve 43 on the coupling 33, immediate access may be had to the set screw 39 for the purpose of attaching the' coupling to or disconnecting the same from the cable 32.

When the invention is placed in use, the coupling 38 may be connected, as aforesaid, to the drive shaft of a suitable electric or gasoline motor, and by virture of the flexible cable and casing 32, 31, the cutting head may be conveniently manipulated, while the actuating motor remains relatively stationary on theground.

Needless to say, the cable 32 may be of any desired length, and also, a rigid extension shaft may be interposed between the outer end of the cable and the cutting head, so as to facilitate access to high trees, or the like.

Referring again to the structure of the cutting blades I5, I8, the extent of reciprocating movement of the blade 18 is, of course, governed two blades, and the edges of the openings 36 as well as of the teeth 48 are beveled on one side of the blade, as indicated at 49. In this manner, the formation of sharp cutting edges is achieved, but it will be noted that the adjacent contacting surfaces of the blades I5, I8 are flat, so that relative sliding movement of the two blades is facilitated.

Finally, with reference to the accompanying Figure 8, a sharpening attachment designated generally by the reference character 59 is provided for use in association with the invention, the same embodying in its construction a substantially conical grind stone 5I mounted upon the shank 52. This shank is, in turn, equipped with a coupling '53 provided with a set screw 54,"whereby the entire attachment may be readily mounted upon the outer end portion of the cable 32, after the cutting head has been removed from the latter. The configuration of the stone 5| is V complementary to the beveled edges 49, of the I5, I8 may be undertaken even by unskilled persons.

It is believed that the advantages and use of the invention will be clearly understood from the foregoing disclosure and accordingly, further description thereof at this point is deemed unnecessary.

While in the foregoing there has been shown and described the preferred embodiment of this invention it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

What I claim as my invention is:

1. A power clipper comprising a housing includingfirst, second and third endwise abutting sections, said first section having a recess therein, a cam member disposed in said recess and journaled in said first and second sections, said third section having a passage therein, a drive shaft extending through said third section and into said passage, means disposed in said passage for coupling said shaft and cam member, a fixed blade having a portion thereof underlying said sections and constituting a closure for said recess and passage, means securing said second and third sections to said fixed blade, a movable blade, common means slidably connecting said movable blade to said fixed blade and immovably connecting said fixed blade to said first section, and follower means carried by said movable blade and engaging said cam member.

2. The combination of claim 1 wherein said movable blade has a shouldered slot therein, said common connecting means including a bolt having a stepped head, said stepped head being slidably receivedin said shouldered slot and engaged with said fixed blade to immovably attach the first section to the :fixed blade and slidably attach the movable blade to the fixed blade.

JOSEPH PODNER.

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

UNITED STATES PATENTS Number Name Date 239,978 Noyes Apr. 12, 1881 7 335,39? Taylor Feb. 2, 1886 912,164 Pierson Feb. 9, 1909 1,357,031 Daugherty Oct. 26, 1920 1,430,173 Malvick Sept. 26,1922 1,832,993 Masek Nov. 24, 1931 1,902,988 Bott d Mar. 28, 1933 2,083,359 Branch June 8, 1937 FOREIGN PATENTS Number Country Date 513 Great Britain Jan. 12,1887 21,584 Great Britain Dec. 10, 1891

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