Metal fence post driver
OwnerB. Hunter Aldridgeinventor
Life of this patent
Estimating the term…
Abstract
A metal fence post driving apparatus is formed by a platform rearwardly supported by the three point hitch of a conventional tractor and having a fluid pressure generating unit on the platform driven by the tractor power takeoff. A mast having a top end portion rotatable about its vertical axis pivotally supports a boom intermediate its ends for horizontal and vertical pivoting movement of its respective end portions by a first fluid pressure operated cylinder. A second fluid pressure cylinder pays out and retracts one end portion of the wire line of a block and tackle unit for elevating and lowering a fluid pressure operated reciprocating unit axially disposed on a post top to be driven into the ground.
Claims6
A post driver attachment for use with a mobile prime mover having a source of power and a plurality of attachment supports, comprising:
- a frame having a horizontally disposed portion and an upstanding end portion supported by said prime mover attachment supports;
- a source of fluid under greater than atmospheric pressure;
- a mast supported by said frame end portion;
- an elongated boom having opposing end portions pivotally supported intermediate its end portions by said mast for horizontal pivoting movement about a vertical axis and vertical pivoting movement of its respective end portions about a horizontal axis;
- a first fluid pressure cylinder interposed between said mast and one end portion of said boom for elevating or lowering respective end portions of said boom;
- block and tackle means including an elongated flexible element supported by said other end portion of said boom;
- a second fluid pressure cylinder interposed between said block and tackle means and the boom for paying out and winding up one end portion of said flexible element;
- a fluid pressure operated post driver unit supported by said flexible element and having a post end portion receiving chuck and having a vertically reciprocating plunger intermittently contacting the top end of a post contained by said chuck;
- and,
- tubing operatively connecting the source of fluid pressure with said first and second cylinders and the post driver unit.
A post driver attachment for use with a mobile prime mover having a source of power and a plurality of attachment supports, comprising:
- a frame supported by said prime mover attachment supports;
- a source of fluid under greater than atmospheric pressure;
- a mast supported by said frame;
- an elongated boom having opposite end portions pivotally supported intermediate its end portions by said mast for horizontal pivoting movement about a vertical axis and vertical pivoting movement of at least one end portion about a horizontal axis;
- a first pressure cylinder interposed between said mast and said boom for elevating and lowering the end portions of said boom;
- block and tackle means including an elongated flexible element supported by the end portion of said boom opposite the first pressure cylinder;
- a second pressure cylinder interposed between said block and tackle means and said boom for paying out and winding up one end portion of said flexible element;
- a fluid pressure operated post driver unit supported by said flexible element one end portion and having a post end portion receiving chuck and having a vertically reciprocating plunger intermittently contacting the top end of a post contained by said chuck;
- and,
- tubing operatively connecting the source of fluid pressure with said first and second cylinders and the post driver unit.
Dependencies are inferred from the claim text.