PERMA LAND BOUND STAKE DEVICE

• US 3,824,748 A
• Filed: 02/14/1973
• Issued: 07/23/1974
• Est. Priority Date: 02/14/1973
• Status: Expired due to Term

• Current Assignee: John R. Pichowicz
• Original Assignee: John R. Pichowicz
• Inventors: Pichowicz, John R.
• Primary Examiner(s): Abbott, Frank L.
• Assistant Examiner(s): Raduazo, Henry
• Application Number:
  US05/331,340
• Time in Patent Office: 524 Days
• Field of Search: 52/103,160,161,162,164
• US Class Current: 52/103
• CPC Class Codes: E04H 12/223 with movable anchoring elements; with separately driven anchor rods
• CPC Class Codes: G01C 15/06 Surveyors' staffs; Movable markers

Abstract

This invention relates to a permanent marker stake for use by surveyors. The stake has a top blunt end and a bottom pointed end and carries two blades pivoted to the stake above the pointed end. The free ends of the blades are sharpened and the pivot ends have an abutment to bear against the stake when the blades pivot outwardly. A sleeve having a flange at its upper end is slidably mounted on the stake from a lower position at which the blades are held adjacent the stake to a position above the blades. In the upper position the blades are free to pivot outwardly of the stake. A tension spring is located between each blade and the stake to urge the blades to pivot outwardly when the sleeve has moved to free the blades. Before the stake is driven in the ground the sleeve is in downward position retaining the blades against the stake. At a specific point on the ground the stake is driven into the ground by a hammer or other means. As the stake moves into the ground the flange of the sleeve contacts the ground stopping movement of the sleeve but allowing the stake to further penetrate the ground and the sleeve to release the blades. The blades are then free to pivot and move into the ground to the side of the stake. A short upward movement of the stake causes the sharpened end of the blades to penetrate the ground and move into the ground until the abutments on the blades contact the stake. The stake is then locked into the ground and cannot be removed without digging it out. The upper blunt end of the stake is covered with a cap member. The entire stake has a non-corrosive surface and the upper end of the stake may be covered with a fluorescent material below the cap for more easily locating the stake in the ground.

Claims

1. A surveyor'"'"''"'"'s stake of durable man made material comprising a rigid stiff elongated rod having a blunt top end and a pointed bottom end;

blades, each having a sharpened end and an abutment end;

pivot means above the pointed end of the rod and extending through the abutment ends of the blades to permit the blades to freely pivot outwardly from the rod;

tension spring elements;

means fixedly attaching one end of each tension spring element to the rod above the pivot means, the other end of each tension spring element resting upon the side of each blade facing the rod to urge the sharpened ends of the blades away from the rod;

sleeve means slidably mounted on said rod above the pointed ends of the blades and adapted to slide over the sharpened ends of the blades to retain the blades against the rod with the springs between the blades and the rod with the springs under tension;

a ground engaging flange element fixed to the upper end of said sleeve;

whereby when the rod is driven into the ground by means not shown, the pointed end of the rod moves into the ground until the blades are substantially beneath the surface of the ground and, upon further penetration of the rod, the flange of the sleeve contacts the surface of the ground, the sleeve moves up releasing the blades and allowing the sharpened ends of the blades to move outwardly from the rod under the action of the springs and upon raising the rod slightly the blades pivot outwardly until the blade abutments engage the rod and the blades are in locking position in the ground with the top end of the rod above the ground.

2. The structure recited in cLaim 1 above wherein the rod is an iron pipe;

a ground penetrating point on the bottom end of the pipe and the blades are concave transversely to nest against the pipe with the springs between the blades and the pipe.

3. The structure of claim 2 wherein the pipe is coated with a non-corrosive surface and there is a metalic cap on the top end of the pipe and there is a fluorescent coating on the pipe below the cap.

4. A surveyor'"'"''"'"'s stake comprising a straight pipe having a blunt top end and pointed bottom end;

two transversely concaved blades, each having a sharp end and an abutment end;

pivot means adjacent the abutment ends of the blades, said pivot means extending through the blades and pipe above the pointed end of the pipe to permit the blades to pivot freely outwardly from said pipe;

a sleeve slidably mounted on said pipe adapted to slide over the sharp ends of the blades to retain said blades against said pipe;

a ground engagement flange mounted on the upper end of said sleeve;

whereby when the pipe is driven into the ground by means not shown, the pointed end of the pipe enters the ground and the pipe moves into the ground until the blades are well beneath the surface of the ground and further downward movement of the pipe causes the flange on the sleeve to move out of the contact with the blades allowing the blade to move outwardly into the ground upon a short upward movement of the pipe.

5. The structure of claim 4 wherein the pipe has a non-corrosive surface;

a hard metallic cap is mounted over the blunt end of the pipe and a fluorescent band of material envelopes the pipe below said cap.