Hydraulic Stake Puller

Abstract

A tool for extracting tent stakes from the ground is disclosed. The tool has a portion that houses the motor and hydraulic fluid tank, and a hydraulic cylinder portion the user holds against a tent stake and operates to pull the tent stake. Hydraulic hoses connect the two portions. Separating the motor from the hydraulic cylinder allows the user to manipulate just the portion performing work on the tent stake without having to also lift or stabilize the larger and heavier motor portion. Rotating a handle causes the hydraulic cylinder to extend or retract. A hand guard may be present to prevent accidental crush injuries.

Claims

1. A tool comprising a first portion, a second portion, and at least one hydraulic hose connecting said first portion to said second portion, A. Said first portion comprising an engine, a hydraulic pump, and a hydraulic fluid reservoir, B. Said second portion comprising a hydraulic piston, i. said hydraulic piston comprising a longitudinal axis, a transverse axis, a top, a bottom, a cylinder, and a piston rod, ii. said cylinder comprising an inside surface having a diameter, an outside surface, a top, a bottom, and a first claw, iii. said piston rod comprising an outer surface, a top, and a bottom, iv. said outer surface of the piston rod having a diameter smaller than the diameter of the inner surface of the cylinder, v. said bottom of the piston rod bottom further comprising a foot portion, parallel to the transverse axis of the hydraulic piston, and vi. said outside surface of the cylinder further comprising a claw, said claw located near the bottom of the cylinder, and having a gap at least as large as the diameter of a tent stake, but not as large as the flange of a tent stake.

2. The tool of claim 1 in which the piston rod is predominantly within said cylinder when the tool is not in use.

3. The tool of claim 1 further comprising a handle located at the top of the cylinder, A. said handle comprising a bi-directional rotational switch comprising a first and a second position, B. said first position of the switch of the handle causing the piston rod to extend from the cylinder, and C. said second position of the switch of the handle causing the piston rod to retract into the cylinder.

4. The tool of claim 1 in which the outside surface of the cylinder further comprises a second claw, said claw located near the top of the cylinder, and having a gap at least as large as the diameter of a tent stake, but not as large as the flange of a tent stake.

5. A tool comprising a first portion, a second portion, and at least one hydraulic hose connecting said first portion to said second portion, A. Said first portion comprising an engine, a hydraulic pump, and a hydraulic fluid reservoir, B. Said second portion comprising a handle, a hydraulic piston, and a hand guard, i. said hydraulic piston comprising a longitudinal axis, a transverse axis, a top, a bottom, a cylinder, and a piston rod, ii. said cylinder comprising an inside surface having a diameter, an outside surface, a top, a bottom, and a first claw, iii. said piston rod comprising an outer surface, a top, and a bottom, iv. said outer surface of the piston rod having a diameter smaller than the diameter of the inner surface of the cylinder, v. said bottom of the piston rod bottom further comprising a foot portion, parallel to the transverse axis of the hydraulic piston, and vi. said outside surface of the cylinder further comprising a claw, said claw located near the bottom of the cylinder, and having a gap at least as large as the diameter of a tent stake, but not as large as the flange of a tent stake. vii. Said handle being located at the top of the cylinder and comprising a bi-directional rotational switch comprising a first and a second position, viii. said first position of the switch of the handle causing the piston rod to extend from the cylinder, and ix. said second position of the switch of the handle causing the piston rod to retract into the cylinder. x. said hand guard located above the handle and defining the upper border of a space between the handles and the hand guard.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG. 1 is a perspective drawing of the hydraulic stake puller.

[0008] FIG. 2 is a perspective drawing of the piston component of the stake puller.

[0009] FIG. 3 is a perspective drawing of a user operating the stake puller to remove a stake.

[0010] FIG. 4 is another view of the piston component.

[0011] FIG. 5 is a top plan drawing of a claw of the subject matter of this application, isolated from the other components of the stake puller for clarity.

[0012] FIG. 6 is an illustration of an exemplary tent stake.

[0013] FIG. 7 is a side view of the handle of the state puller, isolated from the other components for clarity.

DETAILED DESCRIPTION

[0014] The following description and drawings referenced therein illustrate embodiments of the application's subject matter. They are not intended to limit the scope. Those familiar with the art will recognize that other embodiments of the disclosed method are possible. All such alternative embodiments should be considered within the scope of the application's disclosure.

[0015] Each reference number consists of three digits. The first digit corresponds to the figure number in which that reference number is first shown. Reference numbers are not necessarily discussed in the order of their appearance in the figures.

[0016] The subject matter of this application pertains to tools for removing stakes from the ground although those in the relevant arts may appreciate other applications for the disclosed tool.

[0017] A hydraulic stake puller is comprised of a first portion (101), a second portion (102), and one or more hydraulic hoses connecting the first portion to the second portion.

[0018] The first portion comprises an engine (103), a hydraulic pump (104), and a hydraulic fluid reservoir (105). Most preferably the first portion further comprises wheels (106), and a housing (107).

[0019] The second portion comprises a rotating handle (201), and a hydraulic piston (401). Said hydraulic piston having a longitudinal axis (202), a transverse axis (402), a cylinder (203), and a piston rod (403). The cylinder comprises an outside surface (204), an inside surface, a top (205), and a bottom (404). The outside surface of the cylinder comprises a first claw (206) located near the bottom of the cylinder. The piston rod comprises an outside surface (405), a top (406), and a bottom (407). The bottom of the piston rod further comprises a foot portion (207). In most preferred embodiments, the outside surface of the cylinder further comprises a second claw (208) located above said first claw.

[0020] The first claw comprises a platform (209) parallel to the transverse axis of the hydraulic piston (402), said platform comprising a gap (210). Said gap is at least as wide as a tent stake (301), but not as wide as the flange or flanges (302) on a tent stake.

[0021] If present, the second claw also comprises a platform (211) parallel to the platform of the first claw. Said platform of the second claw comprises a gap (212) at least as wide as a tent stake (301), but not as wide as the flange or flanges (302) on a tent stake.

[0022] The foot portion comprises planar surface (303) that rests against the ground when the hydraulic piston is held upright.

[0023] The rotating handle of the second portion comprises a switch activated by rotating the handles. Said switch having at least three positions selected by the user rotating the handles: a first switch position (701) activating the piston rod such that it extends from the cylinder, a second switch position (702) which causes the piston rod to retract into the cylinder, and a third switch position (703) that is neutral and doesn't result in the piston rod moving in relation to the cylinder. Such a rotational switch may decrease stress on the users hands and wrists in comparison to alternative switch designs such as finger or hand triggers. In a most preferred embodiment, the first switch position (701) is reached by the user grasping the handle in the neutral handle position (703) and rotating the handle approximately 30 degrees overhand, and the second switch position (702) is reached by rotating the handle approximately 30 degrees underhand from the neutral switch position. In other embodiments, there are multiple switch positions and the degree of force generated by the piston is determined by the degree of deflection of the rotating handle from the neutral position.

[0024] In a most preferred embodiment, the second portion further comprises a hand guard (408). Said hand guard prevents the user's hands from being pinched between the rotating handle and environmental obstacles, such as e.g., branches overhanging the location of a tent stake. One preferred embodiment of the hand guard is comprised of a set of non-rotating handles located above, and parallel to, the rotating handles although others familiar with the relevant arts will recognize other hand guard designs that would also protect the user.

[0025] In operation, the user moves the hydraulic stake puller near the location of a stake driven into the ground. The user starts the motor and positions the cylinder of the second portion of the hydraulic stake puller such that the foot portion of the piston rod is against the ground and the gap of the platform of the first claw surrounds the tent stake but is located beneath the flange of the tent stake. The user rotates the handle to cause the piston rod to extend from the cylinder and as the foot of the piston rod presses against the ground, the cylinder is driven away from the ground, causing the first claw to contact the flange of the tent stake and pull the stake out of the ground. If necessary, after the initial extraction of the tent stake, the user may rotate the handle in the opposite direction to cause the piston rod to retract into the cylinder, then reposition the cylinder such that the second claw is located beneath the flange of the tent stake before again rotating the handle to cause the piston rod to extend. In this way, long stakes that might not otherwise be fully extracted by the actions of the first claw may still be removed by the disclosed hydraulic stake puller. If during the operation of the hydraulic stake puller an obstacle is encountered by the hand guard the user can reposition the hydraulic stake puller and continue to extract the stake.