US3327748A

US3327748A - Hacksaw construction

Info

Publication number: US3327748A
Application number: US507190A
Authority: US
Inventors: Aldor S E Reuterfors
Original assignee: Estwing Manufacturing Co Inc
Current assignee: Estwing Manufacturing Co Inc
Priority date: 1965-11-10
Filing date: 1965-11-10
Publication date: 1967-06-27
Anticipated expiration: 1984-06-27

Description

J1me 1 A. s. E. REUTERFORS 3,

HACKSAW CONSTRUCTION Filed Nov. 10, 1965 United States Patent 3,327,748 HACKSAW CONSTRUCTION Aldor S. E. Reuterfors, Rockford, Ill., assignor to Estwing Manufacturing Company, Inc., Rockford, 111., a corporation of Illinois Filed Nov. 10, 1965. Ser. No. 507,190 7 Claims. (Cl. 14533) This invention relates to an improved hacksaw construction.

It is an object of this invention to provide an improved hacksaw which can be selectively utilized with saw blades of different lengths.

Another object is to provide a hacksaw having improved means for holding the blade to inhibit vibration during use.

A further object is to provide an improved hacksaw wherein the blade can be selectively positioned between a central position and a position adjacent the side of its frame and wherein the blade can be selectively positioned at an angle from the frame.

Still another object is to provide a hacksaw having an improved means for holding spare blades.

Other objects and advantages will become apparent from the following detailed specification When taken in conjunction with the accompanying drawings wherein:

FIG.1 is an elevational view of an embodiment of the present invention;

FIG. 2 is a sectional view taken generally along line 22 of FIG. 1;

FIG. 3 is a cross-sectional view taken along line 33 of FIG. 1; and

FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 1.

Referring to these figures, the hacksaw, generally designated 10, comprises a frame assembly having a longitudinal body portion 12, a front leg 14, and a rear leg 16. A handle 18 is attached to the frame assembly and spaced rearwardly of the rear leg 16. In this manner, the rear leg 16 serves as a guard for the hand of a user. Preferably, a rigid member 19 is connected to the handle and the rear leg adjacent the lower ends thereof to further assure a rigid mounting of the handle on the frame assembly.

Front leg 14 has an opening 21 passing therethrough and located adjacent the lower end thereof. An element 22 passes through the opening and has a laterally offset portion adjacent one end thereof describing blade engaging faces 23 and 24. Blade engaging face 23 is located substantially at the center line of the hacksaw and outer blade engaging face 24 preferably is located adjacent the side of front leg 14, as best seen in FIG. 2. A pin or stud 25 extends outwardly from each blade engaging face to be received in the opening adjacent an end of an ordinary hacksaw blade .13. The other end of element 22 is conveniently threaded for receiving a fastener 26. The fastener may be detached for removal of the element 22 to change the location of blade engaging face 24, as hereinafter desribed.

Rear leg 16 preferably has an opening 31 passing therethrough adjacent the lower end thereof. Handle 18 has an opening 32 passing therethrough and preferably coaxial with opening 31. In one position an element 34 passes through openings 31 and 32 and has a threaded end portion for receipt of fastener 35 for a purpose which will hereinafter become apparent. The other end of element 34 is similar to the end of element 22 and includes an offset portion describing a generally fiat blade engaging face 37 located generally at the center of rear leg 16 and an outer blade engaging face 38 substantially at the side of rear leg 16. Each face has a stud 25 extending outwardly therefrom for engaging an opening adjacent the other end of the ordinary hacksaw blade B. By selecting one of the two pair of studs, the blade B is adjustable between a position substantially on the center line of the hacksaw (FIG. 2) and a position generally at the side of the hacksaw as shown in phantom in FIG. 2. This latter position is advantageous for sawing adjacent an obstruction, for example.

As best seen in FIG. 4, opening 31 is generally in the shape of an eight-sided star whereby element 34 may be selectively positioned in any of eight positions disposed generally 45 from the adjacent positions. Opening 21 is preferably similarly shaped and opening 32 is conveniently so shaped (FIG. 2). By removing

fasteners

26 and 35,

elements

22 and 34 may be removed from the opening and selectively repositioned thereby allowing blade B to assume any of the various positions.

Referring to FIG. 1, it will be noted that the axis of openings 31 and 32, as designated by line 40, is oblique to a

line connecting pins

25 and 25 and to the edge of blade B, as designated by line 41. As fastener 35 is tightened against the backside 18' of handle 18 and pin 25' is moved toward the rear of the hacksaw, the blade B and element 34 try to assume a straight line. Since their relative axes are oblique to each other, this force causes the blade to urge element 34 upwardly against the top of opening 31. This arrangement, wherein element 34 is tilted with respect to the blade, inhibits rattling or vibrations when the saw is being used. It should be noted that element 34 is pressed or forced in the same direction as pressure applied on the saw blade during use in an ordinary position generally coplanar with the legs, as shown. By tilting element 34 in this manner, the rear end of blade B is disposed downwardly from the lower surfaces of rear leg 16, handle 18 and fastener 35, thereby advantageously providing clearance of the rear leg above the plane of the teeth at the lower edge of the blade.

A salient feature of the present invention is its adjustability for use of blades of different lengths. Fastener 35 may be removed and element 34 extended toward the front leg. In the embodiment illustrated, the end of element 34 is withdrawn from slot 32 in the handle and the fastener 35 is repositioned for tightening against the backside 16' of rear leg 16, as shown in phantom in FIG. 1. The hacksaw is then adapted for use of a relatively shorter blade designated B. For this purpose, it will be noted that the backside 16' of rear leg 16 is spaced from the handle 18 a distance sufiicient for positioning fastener 35 therebetween. Likewise, member 19 is attached to the leg and handle at a position which allows operative use of the fastener. In the present embodiment, the parts are arranged so that shorter blade B, in ordinary position shown, has its cutting edge at a more acute angle to element 34 than longer blade B. This is caused by the shorter length of blade B and provides clearance of the repositioned fastener 35 (shown in phantom in FIG. 1) above the plane of the cutting edge.

In its preferred form, the body portion 12 has a generally I-shaped cross section including a web portion 42 and flanges 43 and 44 attached at either side of the web. A blade holder, generally designated 46, is located intermediate the ends of the body portion for holding a spare blade B" generally contiguous to the web 42. In the embodiment illustrated in FIG. 3, the blade holder comprises a generally channel-shaped plate 48 located between the flanges and attached thereto by any convenient means. A spring in the form of leaf spring 49 is attached to the plate 48 and has its end 49' disposed adjacent the web 42 for holding a blade snugly thereagainst. As shown, a plurality of blades may 'be held by the blade holder and are inserted into this position simply by slipping the blade between the leaf spring and web. The blade is easily withdrawn by a reversal of this operation.

It is now deemed obvious that the present invention provides means for securely holding a blade in operating position so that there is no rattling during use and that blades of various length may be utilized. It has been seen that the blade may be positioned either at the center line of the hacksaw, adjacent either edge thereof, or in various other positions, and that the saw has means for storing a convenient supply of spare blades.

While I have thus described a preferred embodiment of my invention this has been done by way of illustration and not limitation and I do not wish to be limited except as required by the appended claims.

Iclairn:

1. A hacksaw comprising: a longitudinal body having front and rear ends, a front leg attached to the body adjacent its front end, rear leg means attached to the body adjacent its rear end, first means on said front leg for receiving and holding one end of a saw blade, second means on the rear leg means for receiving and holding the other end of the saw blade and adjustable for receiving blades of different lengths, said rear leg means having front and rear longitudinally spaced bosses each having a longitudinal opening extending the-rethrough, said openings arranged generally coaxial with each other, said second means including an elongate element extending through said openings in one position to accommodate a blade of one length, a fastener engaged with said element and said rear boss when the element is in said one position, said elongate element selectively slidable in said openings to a second position to accommodate a blade of another length, and said fastener engaged with the element and said front boss when the element is in said second position.

2. The article of claim 1 wherein said first and second means each include at least one laterally extending pin shaped for engaging an aperture adjacent an end of the blade, and wherein the axis of the openings is oblique to a line connecting said pins so that tightening of the fastener forces the element against a side of the front boss opening nearest the body.

3. The article of claim 2 wherein the axis of the openings is at an acute angle to the line connecting the pins, and said angle having a size that the blade held by the pins has its cutting edge at a level beyond the extremities of the bosses and fastener. I

4. The article of claim 1 wherein said rear leg means includes a second leg attached to the body adjacent its rear end and a handle portion attached to the body and spaced rearwardly of the second leg whereby the rear leg protects the hand of a user, and wherein said front boss is on the second leg and said rear boss is on the handle portion.

5. The article of claim 1 wherein the front boss opening has opposite flat sides and the element has opposite fiat sides to oppose those of the front boss opening, said element having a blade-engaging end disposed between the front leg and rear leg means, the blade-engaging end being laterally offset from the axis of the openings and having first and second flat surfaces, said first surface generally coplanar with the rear leg means, said second surface disposed adjacent a side of the rear leg means, said first means on the front leg having a blade-engaging end similarly shaped as the blade-engaging end of the element and having a first flat surface generally coplanar with the front leg and a second flat surface disposed adjacent a side of the front leg, a pin extending laterally from each of said surfaces of the blade-engaging ends and shaped for engaging and opening adjacent an end of the blade whereby the blade may be selectively positioned adjacent the sides of the legs in one position and generally coplanar with the legs in another position.

6. The article of claim 5 wherein said front boss opening is generally square and the element has generally flat sides to oppose those of the opening, and wherein said first means on the front leg is located closer to the body than a continuation of the axis of the openings whereby tightening of the fastener forces the element against the portion of the rear leg opening nearest the body.

7. The article of claim 5 wherein said front boss opening is shaped for receiving said element in various positions arranged in multiples of 45 from the plane of the legs, wherein said front leg has an opening therethrough similarly shaped as the front boss opening, and wherein the first means on the front leg includes a second element passing through the front leg opening and a fastener engaged with the second element and the front leg to hold the second element in selected position, whereby the blade may be selectively disposed in various positions in multiples of 45 from the plane of the legs.

References Cited UNITED STATES PATENTS 925,112 6/1909 Leland -324 972,085 10/1910 Nacey 30--166 1,540,201 6/ 1925 Voltz. 1,674,206 6/ 1928 Kness 30-166 2,658,541 11/ 1953 He-uneman 145-34- 3,082,803 3/ 1963 'Dickstein 14534 FOREIGN PATENTS 1,368,856 6/1964 France.

WILLIAM FELDMAN, Primary Examiner. R, V. IARKER, 1a., Assistant Examiner,

Claims

1. A HACKSAW COMPRISING: A LONGITUDINAL BODY HAVING FRONT AND REAR ENDS, A FRONT LEG ATTACHED TO THE BODY ADJACENT ITS FRONT END, REAR LEG MEANS ATTACHED TO THE BODY ADJACENT ITS REAR END, FIRST MEANS ON SAID FRONT LEG FOR RECEIVING AND HOLDING ONE END OF A SAW BLADE, SECOND MEANS ON THE REAR LEG MEANS FOR RECEIVING AND HOLDING THE OTHER END OF THE SAW BLADE AND ADJUSTABLE FOR RECEIVING BLADES OF DIFFERENT LENGTHS, SAID REAR LEG MEANS HAVING FRONT AND REAR LONGITUDINALLY SPACED BOSSES EACH HAVING LONGITUDINAL OPENING EXTENDING THERETHROUGH, SAID OPENINGS ARRANGED GENERALLY COAXIAL WITH EACH OTHER, SAID SECOND MEANS INCLUDING AN ELONGATE ELEMENT EXTENDING THROUGH SAID OPENINGS IN ONE POSITION TO ACCOMMODATE A BLADE OF ONE LENGTH, A FASTENER ENGAGED WITH SAID ELEMENT AND SAID REAR BOSS WHEN THE ELEMENT IS IN SAID ONE POSITION, SAID ELONGATE ELEMENT SELECTIVELY SLIDABLE IN SAID OPENINGS TO A SECOND POSITION TO ACCOMODATE A BLADE OF ANOTHER LENGTH, AND SAID FASTENER ENGAGED WITH THE ELEMENT AND SAID FRONT BOSS WHEN THE ELEMENT IS IN SAID SECOND POSITION.