Hydraulic spike puller

A hydraulic spike puller having a frame, a hydraulic drive section connected to the frame, and a spike contacting section connected to the hydraulic drive section. The spike puller has a handle repositionably connected to the frame. The handle is positionable in a straddle position or a parallel position relative to a railroad rail to pull a spike.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to a tool and, more particularly, to a tool 
having a repositionable handle. 
2. Prior Art 
Stanley sells a hydraulic spike puller under the designation SP45. Two 
models are available. The model SP45101 has its handle orientated for use 
in a straddle position relative to the railroad rail where the user 
straddles the rail. The model SP45100 has its handle orientated for use in 
a parallel position relative to the railroad rail where the user stands 
parallel to the rail. Racine, a division of Framatome Connectors USA, Inc. 
sells a hydraulic spike puller under the catalog No. HSP-1. A problem with 
the prior art tools is that a single tool could not easily switch between 
straddle and parallel use positions. 
SUMMARY OF THE INVENTION 
In accordance with one embodiment of the present invention a hydraulic 
spike puller is provided having a frame, a hydraulic drive section 
connected to the frame, and a spike contacting section connected to the 
hydraulic drive section. The improvement comprises a handle repositionably 
connected to the frame. The handle is positionable in a straddle position 
or a parallel position relative to a railroad rail to pull a spike. 
In accordance with another embodiment of the present invention a hydraulic 
tool manifold and rotatable handle assembly is provided comprising a 
manifold member, a valve member, a cap, a handle, and a user actuated 
control. The manifold member has hydraulic conduits therethrough. The 
valve member is movably mounted in one of the conduits of the manifold 
member. The cap is repositionably connected to the manifold member. The 
handle is connected to the cap. The user actuated control is movably 
connected to the handle and adapted to move the valve member relative to 
the manifold member. The handle and the user actuated control can be 
repositioned with the cap relative to the manifold member to allow the 
user actuated control to move the valve member at multiple positions of 
the handle relative to the manifold member. 
In accordance with another embodiment of the present invention, a hydraulic 
spike puller is provided comprising a frame, a hydraulic drive section 
connected to the frame, and a spike contacting section connected to the 
hydraulic drive section. The improvement comprises a user control assembly 
comprising a handle section and a lever. The assembly is repositionably 
mounted to the hydraulic drive section.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to FIG. 1A, there is shown a schematic cross-sectional view of a 
tool 10 incorporating features of the present invention. Although the 
present invention will be described with reference to the single 
embodiment shown in the drawings, it should be understood that the present 
invention can be embodied in many alternate forms of embodiments. In 
addition, any suitable size, shape or type of elements or materials could 
be used. 
In this embodiment the tool 10 is a hydraulic spike puller for pulling 
railroad spikes, such as when a railroad tie or rail is being replaced. 
However, in alternate embodiments features of the present invention could 
be used in alternative types of tools, such as pneumatic tools, jack 
hammers, a ballast tamper or any other tool with a two-hand handle and 
control lever assembly. The tool 10 generally comprises a frame 12, a 
hydraulic drive section 14, a spike contacting section 16, and an assembly 
18. Referring also to FIG. 5A, a perspective view of the tool 10 is shown 
next to a railroad rail A. FIG. 1A shows a portion of a spike B intended 
to be pulled from a railroad tie (not shown) by the tool 10. 
As seen best in FIGS. 1A and 5A, the frame 12 generally comprises a middle 
section 20, a cover 22, and structural bars 24. The hydraulic drive 
section 14 is mounted to the frame 12 by the middle section 20 and the 
structural bars 24. The hydraulic drive section 14 generally comprises a 
manifold member 26, a main tube 28, a bottom member 30, a piston member 
32, a valve member 34, a connecting bar 36, and a supply tube 38. Two 
hoses 27 (a hydraulic fluid supply hose and a hydraulic fluid return hose) 
are connected between the manifold member 26 and a hydraulic pump (not 
shown) for supplying hydraulic fluid to drive the tool 10. 
As seen best in FIG. 1A, the main tube 28 is connected between the manifold 
member 26 and the bottom member 30. The piston member 32 is movably 
mounted in a hydraulic fluid relieving area in the main tube 28 between a 
down position shown in FIG. 1A and an up position shown in FIG. 1B. The 
manifold member 26 has conduits therethrough. The supply tube 38 is 
connected between a conduit 80 in the manifold member 26 and a conduit 40 
in the bottom member 30 which opens into the hydraulic fluid receiving 
area of the main tube 28. The connecting member 36 movably extends through 
the bottom member 30 and connects the piston member 32 to the spike 
contacting section 16. In alternate embodiments other types of drive 
sections or hydraulic conduiting could be provided. 
The spike contacting section 16 generally comprises two tongs 42 pivotably 
connected to each other. The lower ends of the tongs 42 are designed to 
contact the spike B. The upper ends of the tongs 42 are pivotably 
connected to the pull member 44 by connecting links 46. The pull member 44 
is connected to the connecting member 36. As seen in comparing FIG. 1A to 
FIG. 1B, when the pull member 44 is pulled upward, the tongs 42 move 
towards a grasping position to grasp onto the spike. In alternate 
embodiments other types of spike contacting sections could be provided. 
The assembly 18 is a combined handle and control actuator assembly. 
However, in an alternate embodiment the user actuated control might be 
separate from the handle. The assembly 18 generally comprises a cap 48, a 
handle 50, and a user actuated control lever 52. The cap 48 is rotatably 
mounted on a post 54 (see FIG. 3B) of the manifold member 26. The handle 
50 is fixedly attached to the cap 48. In this embodiment the handle 50 is 
a two-hand "T" type of handle, but other handle shapes could be used. The 
lever 52 is pivotably mounted to the handle 50 in a center groove 56 by a 
pin 58 at holes 59 in the handle. The handle has another set of holes 60, 
and the pin 58 is removable, such that the lever 52 can reverse 
180.degree. relative to the handle to accommodate left hand or right hand 
users. The lever 52 has a valve contact area 62 for contacting the top end 
64 (see FIG. 3B) of the valve member 34. 
Referring now to FIGS. 2 and 3A-3C, the manifold member 26 comprises four 
position holes 66 extending into its top side 68. The valve member 34 is 
mounted in the center conduit 70. A spring 72 biases the valve member 34 
in the up position shown. The valve member 34 has two annular grooves 74, 
76. The manifold member 26 has a first conduit 78, a second conduit 80, a 
third conduit 82, a fourth conduit 84, and a fifth conduit 86. In 
alternate embodiments other conduit configurations could be provided. The 
first conduit 78 connects one of the hoses 27 to the center conduit 70. 
The second conduit 80 connects the center conduit 70 to the supply tube 
38. The third and fourth conduits 82, 84 connect the center conduit 70 to 
the top end of the hydraulic fluid receiving area of the main tube 28. The 
fifth conduit 86 connects the center conduit 70 to the other hose 27. 
With the valve member 34 in the up position shown in FIGS. 3A-3C and the 
pump (not shown) ON, hydraulic fluid is pumped into conduit 78, through 
groove 74, into conduit 84, and into the main tube 28 to drive the piston 
32 down to the position shown in FIG. 1A. Excess fluid located at the 
bottom side of the piston 32 in the main tube 28 is pushed into the 
conduit 40 (see FIG. 1A), through tube 38, into conduit 80, through groove 
76, and out through the conduit 86. When the piston 32 is at the down 
position shown in FIG. 1A, rod bumpers 33 push the check balls 35 off 
their sealing seats on the piston 32 and allow additional fluid entering 
the main tube 28 to pass through the piston 32 into conduit 40, through 
tube 38, into conduit 80, through groove 76 and out conduit 86. The tool 
is "open center" with the piston located at this position. Referring now 
to FIGS. 4A-4C, the valve member 34 is shown moved down in the center 
conduit 70. The valve member 34 is moved down by the user depressing the 
lever 52 as shown in FIG. 1B. Hydraulic fluid is pumped into conduit 78, 
through groove 74, into conduit 80, through supply tube 38 (see FIG. 1B), 
through conduit 40, and into the main tube 28 on the underside of the 
piston 32. This causes the piston 32 to move upward in the main tube 28, 
pulling the connecting member 36 and spike contacting section 16, upward. 
Fluid on the top side of the piston 32 in the main tube 28 is transported 
out of the tool through conduit 82, groove 76, and conduit 86. The tool is 
"closed center" when the piston 32 is moving upward. Check balls 35 are 
forced into seats in the piston 32 to seal the through holes in the piston 
at the seats and allow the tool to reach full operating pressure with high 
pull force to remove the spike B. If the user releases the lever 52 the 
spring 72 biases the spool 34 to return to a position as shown in FIG. 1A 
and FIG. 3A. Fluid once again enters cylinder 28 through conduit 78, 
groove 74, conduit 84, and into main tube 28. Fluid flow and pressure push 
the balls 35 onto their seats to provide a seal. The balls 35 will remain 
seated until the bumper rods 33 strike member 30. 
Referring now to FIGS. 1A and 5A, the cover 22 and spike contacting section 
16 are designed to be placed and orientated relative to the rail A and 
spike B as shown. The tool 10 can be rotated 90.degree. along its 
longitudinal axis relative to the rail A and still be able to properly 
pull out the spike B, however, such an orientation is not preferred. The 
preferred orientation is shown in FIGS. 5A-5D. FIG. 5A shows the handle 50 
orientated in a parallel position relative to the rail A. In this position 
the user would stand facing the rail A with both feet on one side of the 
rail A. In FIG. 5A the control lever 52 is shown in a position over the 
right hand section 50.sub.R of the handle 50. The lever 52 is positioned 
for a right hand user to depress the lever with his right hand while 
grasping the right hand section 50.sub.R. The hoses 27 are shown extending 
from the left hand side of the tool 10. 
Referring now also to FIG. 5B, the same tool is shown in the same parallel 
position relative to the rail A. However, the assembly 18 has been moved 
to accommodate a left handed user. The lever 52 is located over the left 
hand section 50.sub.L. In order to reposition the assembly 18 the cap 48 
is rotatable on the manifold member 26. The assembly 18 has a spring 
loaded locking pin 90. The locking pin 90 has a bottom end which can 
project into one of the holes 66 (see FIG. 2) in the top side of the 
manifold member 26. Thus, the user can lift up the pin 90 from one of the 
holes 66, rotate the cap 48 on the post 54 (see FIG. 3B) of the manifold 
member to a new position, and release the pin 90 to extend back into one 
of the holes 66 and thereby lock the rotational position of the cap 48 
relative to the manifold member 26 again. In alternate embodiments other 
types of means to repositionably mount the assembly 18 to the manifold 
member or frame could be provided. The manifold member 26 has four of the 
holes 66 which are 90.degree. apart. However, in alternate embodiments 
more or less holes could be provided and at any suitable angular 
orientation relative to one another. The assembly 18 can be rotated 
360.degree. and locked in place every 90.degree.. This feature, in 
addition to allowing left hand and right hand reconfiguration as seen in 
comparing FIGS. 5A and 5B, can also allow the hoses 27 to be orientated on 
the left side or right side of the tool 10. 
As noted above, the user can also reorientate the lever 52 180.degree. 
without moving the cap 48 or handle 50. The user can remove the pin 58 
from the holes 59, reorientate the lever 52 in the groove 56, and then 
insert the pin 58 into the holes 60 to pivotably mount the lever 52 at the 
holes 60. However, repositional mounting of the lever 52 on the handle 50 
need not be provided. 
Referring also to FIG. 5C, the same tool 10 is shown. However, the assembly 
18 has been repositioned into a straddle configuration with the handle 50 
offset 90.degree. from the positions shown in FIGS. 5A and 5B. The handle 
50 extends over the rail A and the user straddles the rail A with his 
feet; one foot on each opposite side of the rail A. FIG. 5C shows the 
assembly 18 at a position for a right hand user. FIG. 5D shows the same 
tool 10, but the assembly 18 has been repositioned 180.degree. for use by 
a left handed user. Thus, a single tool can be reconfigured into both a 
parallel use configuration or a straddle use configuration relatively 
easily and simply by the user. A user does not need to disconnect the 
section 20 from the bottom member 30 in order to reconfigure the tool 
between parallel and straddle use configurations. The lever 52 is able to 
actuate the valve member 34 at any position of the assembly 18 relative to 
the manifold member 26 because the valve member 34 is centrally located, 
because the valve contact area 62 is centrally located, and because the 
assembly 18 is rotatably mounted on the same axis that intersects the 
valve member 34 and contact area 62. In an alternate embodiment the lever 
52 could be mounted to the cap 48 rather than the handle 50, or any 
suitable control could be provided connected to any suitable area on the 
tool. 
It should be understood that the foregoing description is only illustrative 
of the invention. Various alternatives and modifications can be devised by 
those skilled in the art without departing from the invention. 
Accordingly, the present invention is intended to embrace all such 
alternatives, modifications and variances which fall within the scope of 
the appended claims.