Hydraulic Stake Puller
AssigneeExtractor Corporation
InventorJohn Z. Blank
Life of this patent
Estimating the term…
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.
Claims5
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.
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.
Dependencies are inferred from the claim text.