US907064A

US907064A - Hand-pruner.

Info

Publication number: US907064A
Application number: US41786608A
Authority: US
Inventors: Thaddeus J Litzelman
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-02-26
Filing date: 1908-02-26
Publication date: 1908-12-15
Anticipated expiration: 1925-12-15

Description

l g I T. J. LITZELMAN. HAND PRUNER.

APPLIGATION FILED FEB. 28, 1908.

907,064, y Patented 1380.151908.

1HE NoRnls PETERS C0.. wAsmNcram D. c.

vention wi THADDEUS J. LITZELMAN, OF WILLIAMSPORT, PENNSYLVANIA.

HAND-PRUNER.

Specication of Letters Patent.

Patented Dec. 15, 1908.

Application led February 26, 1908i. Serial No. 417,866.

To all whom it may concern:

Be it known that I, THADDEUs J. LrTzEL- MAN, of Williamsport, in the county of Lycoming and State of Pennsylvania, have in-` vente a new and useful Improvement in Hand-Primers, which improvement is fully set forth in the following speciiication and shown in the accompanying drawings.

This invention relates to certain new and useful improvements in pruners and it has for its objects among others to provide a simple yet durable and efficient hand runer composed of few parts, preferably o' sheet metal, and having provision for adjustment as to strength. The blades are disposed at such angles as to give the least resistance to the operator and the duplex knives being set at an angle to the handle and at right angles to the pane of the levers enables the operator to cut bushes or branches close to the ground without stooping or twisting the wrist. The levers are provided with projections extending toward each other and adapted to serve as stops for the levers When hard pressed together 1n cutting off a limb, and further when ressed past each other to interlock and holdp the levers together or in their closed position.

The pruner is constructed to cut branches from both sides, thereby giving a clean unbruised cut which enables the branch to heal quickly. The construction is such that the user can cut 0E either vertical or horizontal branches with the wrist in a natural position, thus enabling him to do more work with less fatigue.

The levers are constructed to be of different len ths, the right hand lever being longer at the andle end than the left hand lever. These levers are formed with hand rests which are not disposed exactly opposite, the one on the right hand lever being further away from the axial bolt than the other, for the purpose of convenience in grasping the device in the right hand.

Other ob'ects and advantages of the inll hereinafter appear and the novel features thereof will be particularly pointed out in the appended claims.

The invention is clearly illustrated in the accompanying drawings which, with the numerals of reference marked thereon, form a part of this invention and in which- Figure 1 is a side elevation of the improved pruner. Fig. 2 is an edge view thereof.

Fig. 3 is a vertical section on they line 3-3 of Fig. 1. Fig. 4 is a detail of the spring and its inclosing casing, showing the notched hub of said casing for adjustable engagement with one end of the s ring. Fig. 5 is a cross section of the han le-end of the pruner. Fig. 6 is a cross section on the line 6 6 of Fig. 1.

Like numerals of reference indicate like parts throughout the several views. l

Referring to the drawings 1 designates one of the members and 2 the other. These are preferably constructed of sheet metal, usually steel, cut out and formed by the use of dies, as will be understood upon reference to the drawings particularly Figs. 5 andV 6. Each member is shown in this instance as provided with a struck-up reinforcing or strengthening rib 3 and with a hand rest 4. The hand rest on the right hand member 2 is disposed farther from the pivotal bolt of the device than is the hand rest on the member 1,

as seen clearly in Figs. '1 and 2. The hand rests are provided at opposite ends with the curved portions 5 to better receive the hand and prevent slipping thereof longitudinally of the members. As seen best in Fig. 1, these hand rests are not disposed exactly opposite each other, the one being, as above stated, in a plane farther away from the pivotal bolt for the purpose of convenience in grasping the device 1n the right hand. ,In the use of a device of this character the axis of the device is not at right angles with the arm, the hand while grasping the levers or members 1 and 2 being or resting in an oblique or slanting position across the levers.

This being the case, the hand rest 4 of the member 2must be a good deal nearer the operator than the hand rest of the other lever or member 1.

Between the hand rests near the end of the pruner, each member is provided with an inwardly extending portion 6, the said portions extending toward each other, as is evident from Figs. 1, 5 and 6, and the free end of each is provided with a right angled portion or hook 7, as seen best in Figs. 5 and 6. When not in use, these two hooks are engaged or interlocked, as seen in Fig. 6, this being accomplished by a slight springing apart laterally or sidewise of the free ends of the members 1 and 2 and then forcing them toward each other until the hooks engage. When ready for use, the hooks are disengaged, as seen in Fig. 5, and in the use Aof the device the hook portions abut, performing the function of stops for the levers when hard pressed together in cutting off a limb.

Each member is provided with a cutting blade 8, the overlapping edges of which are sufficiently beveled or sharpened, theseV blades extending in the general direction of the length of the members, and, as seen in Fig. 1, the reinforcing rib 3 extends to or slightly beyond the point of junction of the blade with the member proper to give greater strength at such point. ber or lever is also formed at substantially ri ht angles to the blades 8 with .a blade 9, w ich blades 9 also extend at right angles to the planes of the members or levers, as seen clearly in Figs. 1 and 2, whereby two sets of cutting blades are provided at substantially right angles to each other and designed to cut in planes at right angles to each other, one plane being at right angles to the levers. These blades are sufficiently beveled or sharpened, as shown, to perform the necessary cutting, and, as seen in Fig. 1, are so disposed with relation to each other that when the levers are closed and interlocked by their interlocking hooks the cutting edges are overlapped and pass each other further tlian is necessary to sever the limb being cut o The two levers or members 1 and 2 are pivotally connected as follows The right hand member has a polygonal hole 10 and the left hand member 1 a circular opening 11, as indicated best by dotted lines in Fig. 1. screw-threaded pivot bolt 12 is employed provided with a nut 13. This nut rests against the right hand lever or member 2, the nut and the bolt both turning with the said member. Upon the opposite side of the device and bearing against the member 1 is the flange 14 of the circular casing 15, which cas ing is provided with a hub 16 provided upon its periphery with a plurality of notches 17. Within this casing is a spring 18, as seen clearly in Figs. 3 and 4, said spring being practically circular and coaxial with the casing. One end of said spring is turned abruptly, as seen at 19, and is engaged in an opening in the left hand member 1. The inner end of this spring is turned inward toward the hub, as seen at 20, and occupying one of the said peripheral notches 17 as is indicated clearly in Fig. 4. The housing or casing 15 is screw-threaded onto the bolt 12, its hub being turned up tightly against a shoulder 21 on the bolt and turns with said bolt, the bolt, the nut and the casing all turning with the right hand lever or member 2. By adjustment of the inturning end 2O of the sprin into one or the other of the peripheral notches 17, the tension of said spring is varied and the amount of pressure necessary iso operate the pruner correspondingly reguate The mode of use will be apparent from the Each memforegoing description, especially when taken in connection with the annexed drawings, and a further detailed description thereof does not seem necessary. It may be added that the presence of the inwardly extending portions 6 with their interlocking hooks 7 dispenses with the employment of rings or notches, the handles being kept fastened together when the device is not in use by simply pressing the one hook by the other, the spring whose normal tendency is to throw the handle ends of the levers far apart and open the two pairs of cutting blades ready to receive the branch, acts to perform this functionA as soon as the hooks are disengaged.

Modifications in detail may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages. For instance, as seen in Fig. 4, the spring 18 may be of greater length and adapted to engage in another opening in the left hand member or lever 1, when it is desired to provide greater tension or stronger spring. This and likechanges would be considered as coming within the sco e of the appended claims.

AWhat is claime as new is 1. A hand pruner having pivotally united members with two pairs of cutting blades, one in a horizontal lane and the other in a vertical plane, the b ades of each pair having their cutting edges overlapped, and each member having a hand rest disposed at different distances from the pivot of said members.

2. A hand pruner having pivotally united members with two sets of cutting blades, one extending in the general direction of the length of the members and the other at substantially right angles to such length and to the first-mentioned blades, the blades of each pair having their cutting ed es overlapped and each member formed wit a hand rest, said rest being disposed at different distances from the pivot of said members.

3. A hand pruner having pivotally united members with two sets of cutting blades, one extending in the general direction of the length of the members and the other at substantially right angles to such length and to the first-mentioned blades, the blades of each pair having their cutting edges overlapped and each member formed with a hand rest, said rest being disposed at different distances from the pivot of said members and provided with inwardly extending interengaging sto s.

4I? A hand pruner having pivotally united members with two sets of cutting blades, one extending in the general direction of the length of the members and the other at substantially right angles to such length and to the first-mentioned blades, the blades of each pair having their cutting edges overlapped and each member formed with a hand rest, said rest being disposed at different distances from the pivot of said members and provided with inwardly extending interengaging stops, said members being formed of sheet metal with said stops integral therewith.

5. A hand pruner having pivotally united members with two sets of cutting blades, one extending in the general direction of the length of the members and the other at substantially right angles to such length and to the first-mentioned blades, the blades of each pair having their cutting edges overlapped and each member formed with a hand rest, said rest being disposed at different distances from the pivot of said members and provided with inwardly extending interengaging stops, said members being formed of sheet metal with said stops integral therewith, and each member provided with a struck-up reinforcin rib extending in the general direction of t e length of the member.

6. A hand pruner having pivotally united vmembers each formed with a hand rest, said rests being disposed at different distances from the pivot of said members and provided with inwardly extending members forming stops, said members having hooked ends adapted to engage each other.

7. In a hand pruner two pivotally united members having cutting blades, a casing on the pivot of said members and a spring within said casing about the pvot of said members, and means about the pivot of said members for adjustment of said spring to vary its tension.

8. In hand pruners, two ivotally united members having cutting b ades, a casing threaded on the pivot of said members and having av hub bearing against a shoulder on the pivot, and a spring in said casing engaging said hub and one of the members.

9. In hand pruners, two ivotally united members having cutting bllades, a casing threaded on the pivot of said members and having a hub bearing against a shoulder on the pivot, and a spring in said casing engaging said hub and one of the members, said hub having a plurality of notches with which one end of said spring may be adjustably engaged.

In witness whereof, I have hereunto set my hand this 10th day of February, 1908, in the presence of two subscribing witnesses.

THADDEUS J LITZELMAN.

Witnesses:

A. H. STEAD, E. J HANDLosER.