US1525213A - Safety wrench - Google Patents

Description

Feb. 3, 1925. 1,525,213

A. L. TIETZE SAFETY WRENCH Filed July 25, 1924 2 Sheets-Sheet l Z Z 42;/ l

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ATTORNEYS Feb. 3, 1925,. 1,525,213

A. L. TIETZE SAFETY WRENCH Filed July 23, 1924 2 Sheets-Sheet 2 Y Mt, wf

ATTORN EYS res. s, 1925.

PATENT Mannen* L. rin'rzn, or HUNTINofron nnAcn, oAnIronNiA, -Assrenon To STANDARD ein. com, or SAN cisco, CALIFORNIA, A CORPORATION or CALIFORNIA.

SAFETY" WRENCH.

Application mea muy esta., 1924. seran No. 727,642.

To @ZZ whom-,t concern:

Be it known that I, ALBERT L. Trnrzn, a citizen of the United States, residing at Huntington Beach, in the county of Grange e and State of California, have invented certain new and useful Improvements in Safe-l ty' Wrenches, of which the following is a specification.

ll/y invention relates lto safety wrenches il@ of a type especially adapted 'for screwing up or unscrewing the joints in the sucker rods 'of deep well pumps and for other like uses.

In screwing up and unscrewing the sucker rods of a well pump, especially in a deep well, the upper end of the string of rods, when the wrench is applied, will often twist several complete turns, on account of 'the great length of the string, before the lower end is effectively moved, thereby setting up 2*@ a torsional .strain in the string. If any of the ordinary forms of wrenches are used, e and the handle of such a wrench slips out of the'operators grasp, the torsional strain in the string of rods will cause its upper end to untwist, with great rapidity, thereby whirling the wrench around an usually, throwing it violently 0E the rod. Such an accident is extremely hazardous, as the operator or any other person in the immediate ing wrench, or, even if the wrench remains on the rod, .its rapidly whirling handle is a source of great danger. A

The object of lmy present invention isto provide av wrench, by the use of which the above described hazards are eliminated. I accomplish this .object bg providing means for retaining the wrenc u rod, so that it cannot be t rown ol; by providing a wrench of such form that several men can conveniently grasp it at the same time, thereby lessening the probability of losing control of the wrench; and by providing a wrench of suchform that, it is not a source of danger, even if it is rapidly whirled by the untwisting of the sucker rod string. V

Although my invention is described as particularly adapted for working upon the sucker rods o1? well pps, it is obviously rim gate.

vicinity, may be severely injured by the flyon the sucker applicable for use upon any rods, springs, or other parts wherein there may be danger from reactive forces or back-lash .arising from torsional strain. Moreover it should be understood that the form and construction of the device herein described and illustrated may be Varied, within the limits of the yclaims hereto appended, without departing from the essential principles of the invention as expressed in said claims.

With this in view, myy invention will .now be fully described with reference tothe accompanying drawings, wherein Fig. l is a plan view of a preferred form of my safety wrench, showing its use in combination with an ordinary pipe wrench as the gripping member.

Fig. 2 -is a transverse section of the same.

Fig. 3 is a broken plan view, showing my safety wrench without any associated gripping member.

'Fig 4 is a sectional detail of the preferred form of rim gate shown in Fig. 1.

Fig. 5 isa detail of a modified form of Fig. 6 is a broken plan view showing anl ordinary monkey-wrench associated as the gripping member with my safety wrench. v i

Fig. 7 is a broken plan view showing an ordinary open-end wrench associated as the gripping member with my safety wrench.

In the drawings, the referencel numeral 1 designates a circular or substantially circular rim having spokes 2 and 2 converging toward a central'hub 3. In practice I prefer to construct the rim land the s okes 2 of ordinary iron pipe, said spokes ein welded to said rim and to a Harige 3 weld o-r otherwise permanently secured to the hub 3. The spokes 2 are preferably formed of solid dat stock for apurpose to be later set forth. The hub 3 is preferably formed of a fiat late of iron or steel, and is pro-I vided wit a suitably shaped central aperture 4. which may serve as a gripping aperture or jaw to en age a nut or other ob ject, not shown, to e turned.

For the sake of convenience, l' prefer to provide the hub 3 with a slot 5 :referia me from its:rim to the jaw aperture 4, and, said .slot should preferably be made torvtuous, as shown, to prevent the nut orother dle 9. As an alternative form of gate 'for closing the rim gap 6, li have shown in Fig. 5 a swinging gate 7, closed by a spring 8', and held lclosed by a latch 9.l The hub slot 5 may also be provided with any suitable form of closure, such for example as a gate 10, Fig. 6, held in position by any suitable means, such as removable pins indicated at 10.

' My device, as described above, may be used as a wrench if desired, the aperture 4 engaging the object to be turned, or, when the object is of such a size or iorm that it cannot be so engaged, the device may be used in combination with a suitable gripping member, which may be any ordinary 'form of wrench. For example, in Figs. 1 and 2 l have shownl the device associated with a well known form of pipe wrench, as used upon sucker rods. For the purposes of such association, one of the iiat spokes 2 is provided with holes or slots'l, through which bolts 12 are passed, said bolts also passing through the handle 13 of the pipe wrench 14, and thereby firmly holding said pipe wrench in position with its jaws in functional alignmentwith the aperture 4.' A second aperture 15, Fig. 3, may be formed in the hub plate 3to ermit convenient manipulation of the adjusting nut 16, Figs. 1 and 2 of the pipe wrench.

it should be understood that other means may be used for holding they wrench handle 13 in position, and that other forms of Wrenches may be used as gripping members in association with my dev1ce. For example, 1 have shown in Fig. 6 a common monkey-wrench 14', Whose handle 13 is secured to the spoke 2 by clamps 12, and as another example, 1` have shown in Fig. 7 a well known form ot open-end wrench 14, whose handle 13 is secured to the spoke 2 by the bolts 12 as in the case of the pipe wrench 14 shown in Figs. 1 and 2.

In the use of my device, either by itself or in combination with some well known form of wrench as a gripping member, the openings 5 and 6, in the hub and rim respectively, permit the ready positioning of the device upon the work; and this is especially true in working upon` sucker rods, when the u per end of the lstring is supported from a ve by the hoisting or other means, and the lower end extends into the well. The clrcumferential rim or handle 1 enables a number of workmen to grasp it conveniently at the same time, and, even if it should slip out of their grasp, and be whirled4 around lrapidly by the torsional strain in the suckerrod string, no danger would result therefrom; the device could notbe thrown oi the rods because of the tortuous slot 5 and the gates 7 and 10; and the substantially circular form of the rim 1, without projecting handles or other parts, would prevent injury to adjacent persons.

I claim:

1. A safety wrench comprising a circumferential rim member having a gap formed therein; and a hub member positioned within said rim member and connected therewith, said hub member having a gripping aperture and a tortuous slot extending' from said aperture to its outer edge.

2. A safety wrench comprising a circumferential rim member having a gap formed therein; a hub member positioned ,within said rim member and connected therewith, said hub member having a gripping aperture formed therein and a tortuous slot extending from said aperture to its outer edge; and a movable gate adapted to close said slot. j

3. -A safety wrench comprising a circumferential rim member having a gap formed therein; a movable gate adapted to close said gap; and a hub member positioned within said rim member and connected' therewith, said hub member having a gripping aperture and a slot extending from said aperture to its outer edge; and a gate for closing said slot.

4. A safety wrench comprising a circumferential rim member having a gap formed therein; a slidable bolt associated with said rim member for closing said gap; and a hub member positioned within said rim member and connected therewith, said hub member having a gripping aperture and a slot extending from said aperture to its outer edge; and a gate for closing said slot.

5. A safety wrench comprising a circumerential rim member having a hollow por tion and a gap formed in said hollow portion; a bolt slidably carried in said hollow portion and adapted to close said gap; and a hub member positioned within said rim member and connected therewith, said'hub member having a gripping Iaperture and a slot extending from said aperture tp its outer edge; and a gate for closing'saidl slot.

6. A safety wrench comprising a circum- `ferential rim member having a gate-con trolled gap; a hub member positioned within said rim member and connected therewith, said hubv member having a gripping a ture with a gate-controlled entrance s ot; and supplementary gripping `jaws associated with and positioned in functional alignment with said gripping aperture.

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7. A safety Wrench comprising a circumslot; and supplementary gripping jaws referential rim member having a gate-conmovably associated with and positioned in trolled gap; a hub member positioned withfunction-a1 alignment with said gripping 10 in said rim member und connected thereaperture.

5 with, said hub member having a gripping In testimony whereof I have signed my aperture with a tortuous entrance slot exname t0 this specification. tending therefrom; a gate forclosing said ALBERT L. TIETZE.

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