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Патент USA US3034598

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Ma)’ 15, 1962
Filed July 23, 1958
2 Sheets-Sheet l
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May 15, 1962
Filed July 23, 1958
2 Sheets-Sheet 2
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United States Patent O?ice
Patented May 15, 1952
slots 22 are located on the inner side of each arm mem
Wade M. Matheny, Jr., and George R. Heilman, St.
Albans, W. Va., assignors to Union Carbide Corpora
tion, a corporation of New York
Filed July 23, 1958, Ser. No. 750,455
4 Claims. (Cl. 175-156)
This invention relates to rod drivers, and more par
ber 15 and serve as a guide for the pivot pin 28 of yoke
30 which rests in annular depression 23 when the han
dle 33 attached thereto is placed in position.
As more clearly shown in FIGS. 2 and 3, handle 33
has a yoke 30 mounted on one end which comprises
parallel arm members 32 and 34. The arm members,
in turn, pivotally support a movable jaw or clamp shoe
35 by means of a circular pin 39 which passes through
ticularly to an effective device for driving metal ground
each of the arm members. The handle 33 is of any con
rods of the type employed for making electrical ground
venient length that furnishes the necessary leverage for
connections, a principal object of the invention being the
holding and guiding the rod. Located intermediate the
provision of a rod driving device which permits applica
top and bottom of each ‘arm member and projecting
tion of force along the length of any part of a rod for
outwardly therefrom is au‘annular pivot pin 28 which
the purpose of driving it into the ground.
15 extends laterally through each of arm members 32 and
An object of this invention is to provide a relatively
34. Pivot pin 28 is adapted to be pivotally supported
in annular depression 23 of each arm member 15 by way
simple and inexpensive device of the above character
which effectively clamps, guides and applies force to a
of entry through vertical slots 22 and the handle 33 is
thus fulcrumed to swing vertically through rod receiving
superstructure, thereby eliminating hazards and acci 20 channel 16.
The movable jaw or clamp shoe 35 is preferably con
dents to personnel involved and materially reducing op
rod at any given point without the use of scaffold or other
erational costs.
Another more particular object is to provide a rod
driving device comprising a ?xed rod gripping jaw and
a movable jaw adapted to clamp a rod therebetween in
which application of force to the device in clamping en
gagement is transmitted to the rod by friction.
Another object is to provide a construction for attach
ing the movable ‘jaw to a handle which provides effec
tive clamping engagement and which is readily engaged 30
structed of hardened steel and consists of a series of con
cave arcuate teeth 36 which are adapted to match those
of ?xed jaw 19 so as to provide ?rm engagement under
pressure from handle 33 when a rod 24} is placed there
between. The teeth 36 are preferably machined out of
the metal of the movable shoe 35 and are slanted down
ward in the same manner as described for ?xed rod grip
ping jaw 19.
An important feature of the invention resides in slant
ing the teeth of ?xed jaw 19 and movable jaw 35 in a
and disengaged with a minimum of effort.
Another object of the invention is to provide a rod
driving device which can be utilized for the purpose of
driving metal rods out of the ground.
The above and other apparent objects of the inven
tion will appear from the following description and ac
be driven into the ground and is ?rmly engaged between
the teeth of both jaws 35 and 19, the force applied to
companying drawings, in which:
of friction between the teeth and the rod.
FIG. 1 is a perspective view showing the rod driving
device as applied to a rod.
downward direction.
In this manner when a rod is to
recess 11 by means of an air hammer or other equipment
is transmitted to the rod in the proper direction by means
In operation of the rod driving device, the movable
jaw 35 ‘attached to handle 33 is removed from rod re
FIG. 2 is a fragmentary vertical section of the device 40 ceiving channel 16 by means of slots 22.
showing the fixed rod gripping jaw and movable jaw in
In removing
the jaw, handle 33 is disposed in its uppermost position.
clamping engagement with a rod.
FIG. 3 is a perspective view of the movable jaw as
The parallel arm members 15 are then placed astride a
recess 11 located on its top surface.
handle 33 by operating personnel and effective clamping
rod and moved upward or downward along the length
sembly shown in FIG. 2.
of the rod to any selected point so as to provide a con
Referring now to the drawings, wherein like reference 45 venient distance from the ground for driving the rod
numerals designate similar parts throughout the various
downward. Thereafter, the movable jaw 35 is opera
tively positioned by means of pivot pin 28 entering slots
views, 10 designates a solid body member, preferably of
22 and resting in depression 23. Leverage is applied to
hardened steel construction, which is provided with a
The recess 11 is
adapted to receive the driving head of a power hammer 50 engagement is thereby obtained between ?xed rod grip
ping jaw 19 and movable jaw 35. The driving head of
or any other suitable instrument whose function is to
an air hammer or other suitable instrument is placed
receive the direct force of the hammer. Attached to the
in recess 11 and the force applied thereto is transmitted
lower section of body 10 and extending outwardly there
to the rod by means of friction between the rod and the
from are a pair of parallel arm members 15 which de
?ne a rod receiving channel 16. ‘Each arm member 15 55 teeth of ?xed jaw 19 and movable jaw 35. For extract
ing ground rods when underground obstruction proves
is attached to body member 10 by any suitable means, as
impossible to penetrate, the rod driving device is merely
by bolts 7, for example, which pass through the lower
placed in reversed position and the rod driven out of the
section of the body portion and are ?tted with castle nuts
and cotter pins.
ground. This procedure, obviously, is the reverse appli
Vertically located on an elongated ?at sidewall of body 60 cation of driving a rod into the ground.
In order to prevent operating personnel from inserting
member 10 and facing rod receiving channel 16 at sub
the movable jaw 35 in the wrong fashion, an elongated
stantially right angles is a ?xed rod gripping jaw 19 com
slot 38 may be provided on the upper side of yoke 30 be
prising a set of concave arcuate teeth which, as illus
tween parallel arm members 32 and 34 whereby a cen
trated in FIG. 2, engage a portion of rod 20. The
trally located outwardly extending ?ange 41 on the back
teeth are machined out of the metal body member 10
side of movable jaw 35 may lie parallel therein. The
and are slanted downward in the direction of the force
applied to recess 11.
Intermediate the end surface of each parallel arm
member 15 and ?xed rod gripping jaw 19 are formed
opposing slots 22 which extend vertically downward
from the top to the intermediate portion of each arm
member and terminate in arcuate depression 23. The
dimensions of opposing slots 22 and pin 28 are then con
structed so that ‘the movable shoe 35 can be operatively
positioned only when the ?ange 41 rests in slot 38.
The metal rods, pipe, and the like which may be driven
into the ground by the rod driving device of this inven
tion include, for example, rods having a diameter up
surface, parallel arm members de?ning a rod receiving
channel perpendicularly attached to the lower portion of
said body member, a ?xed rod gripping jaw comprising
to abouLtwo and one-half inches. Interchangeable jaws
having matched teeth for both the ?xed rod gripping
' “jaw :19 and movable jaw 35 may be employed for each
nominal pipe diameter up to about two and one-inches.
a set of downwardly slanting concave arcuate teeth lo
As a practical matter, however, it has been found that
three sizes of matching teeth in non-changeable jaws suit
ably accommodate all rods ranging in diameter from IA
inch to 21/2 inches. For example, a tooth size of 3/8 inch
cated on the side of said body member and facing the
rod receiving channel, a yoke member pivotally sup
ported by said arm members within said rod receiving
channel, a movable jaw comprising a set of downwardly
or one inch may be used for rods having a diameter of,
' slanting concave arcuate teeth pivotally attached to said
‘1%’, inch to 1/2 inch and 3%; inch to 1% inches, respective 10 yoke member and facing the ?xed rod gripping jaw, and
handle means attached to said yoke member whereby
'ly. A tooth size of 2 inches will accommodate rods
the application of leverage thereto provides elfective
ranging in diameter from 14' inch to 21/2 inches. Al
clamping engagement of a rod disposed between the ?xed
though the teeth of both jaws are preferably arcuate, the
teeth of the movable jaw maybe ?at since in conjunc
rod gripping jaw and movable jaw.
tion with the arcuate teeth of ?xed jaw 19 there is sui?
2. A rod driving device comprising a body having a
recess in the top thereof, arms attached to said body de
?ning a rod receiving channel, a ?xed rod gripping jaw
on the side of said body facing said channel, a yoke piv
oted between said arms, a movable jaw pivoted substan
cient holding force.
The work piece driven into the ground is usually of
circular section, however rods of hexagonal or octagonal
section may be easily driven provided there are enough
tially at the center thereof within said yoke and facing
longitudinal surface faces to afford ?rm engagement for
said ?xed jaw, the. depth of said channel and the vertical
the teeth. The only limitation on length of the rod is
extent of the gripping face of said jaws being greater than
imposed by the tendency of long, thin rods or pipes to
the width of said channel to providev a long gripping area,
bend. In general the smaller the diameter of the work
and a handle ‘on said yoke for urging the pivot of said
piece, the shorter the length that may be driven into the
ground. The material of which the work piece is con 25 movable jaw substantially horizontally toward said ?xed
jaw to provide clamping engagement substantially uni
structed is limited to metals and hard woods of sul?cient
formly over said long gripping area.
strength to withstand distortion by the resistance of the
3. A rod drivingdevice as claimed in claim 2, in which
ground to the force ‘applied.
said pivoted jaw has downwardly slanting concave teeth
The subject rod driving device can be used wherever
it is necessary to drive long, heavy metal rods or pipes 30 distributed. above and below the pivot thereof.
4. A rod driving device as claimed in claim 2, in which
‘into the ground and has been found’ particularly suited
1the inner side of each arm has a slot and an annular de
for driving metal rods for making electrical ground con
pression removably receiving the pivot of said yoke.
nections. Other contemplated uses for the rod driving.
‘device include the driving of metal fence posts, light
References Cited in the ?le of this patent
standards, sign standards, anchor bolts, ‘and the like.
As is apparent from the above ‘description, operation
of the rod driver is accomplished at ground level without
Danielson ___________ __ Dec. 10, 1889
the aid of a sca?old or other superstructure which thus
reduces operational costs and substantially eliminates the
danger of accidents and injury to operating personnel.
Numerous modi?cations are apparent in view of the
foregoing speci?cation and it is not intended to-limit the
invention to‘ the precise embodiment illustrated. All
suitable modi?cations and equivalents may be resorted to
which fall within the scope of the appended claims.
What is claimed is:
1. A rod driving device comprising, in combination, a
solid body member having a recess located on its top
Morris ______________ __ Jan. 12,
Freeman ____________ .. June 16,
Abbott et aI. _________ __ Aug. 23,
Bet-ts ________________ __ Oct. 29,
Callan ______________ __ Sept. 29,
Aumiller ____ _; _______ -_ Oct. 9,
Hill _________________ _. Sept. 28,
Great Britain ________ __ May 14', 1925
Austria _____________ __ Ian. 25, 1938
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