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Post driver safety latch

a technology for latching and posts, applied in the field of post drivers, can solve problems such as the post being displaced from the fram

Inactive Publication Date: 2006-06-01
SHAVER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the frame must be open to receive the post, there is a possibility that the post can be displaced from the frame during the driving procedure.

Method used

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  • Post driver safety latch
  • Post driver safety latch

Examples

Experimental program
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Effect test

Embodiment Construction

[0012] Illustrated in FIG. 1, generally at 10, it the post support of the present invention shown mounted on a frame 12 of a post driver inside of which is shown a post 14. Above the frame 12 is a hydraulic cylinder 16 that contacts the top of the post 14 to drive it into the ground.

[0013] The post support 10 is shown in its open or released position in FIGS. 2 and 4. It includes a plate 18 mounted to a side of the frame 12. An arm member 20 is mounted to the plate 18 for swinging pivotal movement about an axis defined by a pin 22. The arm member 20 includes a first section 24 and a second section 26. A post-engaging roller 28 is supported centrally on the arm member 20 approximately at the junction between the two sections. The free end of the second section 26 includes a handle 30 that is grasped by a user when swinging the arm member 20.

[0014] A spring 32 interconnects the first section 24 and the plate 18 at a position rearwardly of the pin 22. The spring 32 biases the arm mem...

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PUM

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Abstract

A safety latch for supporting a post in a post driver while the post is being driven into the ground. A post-engaging roller is mounted on a lever arm that is pivotally attached to the post driver and moveable between a released position for positioning of a post in the post driver and a working position where the roller is in supporting engagement with the post. A spring biases the roller to maintain supporting engagement with the post while it is driven. In a preferred embodiment, the spring is part of an over-center device for biasing the safety latch to both the released and working positions depending on which side of center the lever arm is positioned.

Description

[0001] This application claims priority to U.S. patent application Ser. No. 60 / 623,325, filed Oct. 29, 2004.BACKGROUND OF THE INVENTION [0002] The invention relates generally to post drivers and, more specifically, to a safety device for a hydraulic post driver. [0003] Hydrauic post drivers are used in the setting and driving of posts into the ground. The drivers are usually carried on a prime mover, such as a truck, agricultural tractor, or the like. The prime mover transports the driver to the desired position and then uses pressurized hydraulic clued from the prime mover to drive the post into the ground. An example of a hydraulic post driver is described in U.S. Pat. No. 2,940,267, which is incorporated herein by this reference. [0004] Even though warned to use a tool or similar device to hold the post, if needed, while using the post driver, users would sometimes ignore the warnings and use their hands to hold or steady the post. The present device holds the post in position an...

Claims

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Application Information

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IPC IPC(8): E04G3/00
CPCE04H17/263
Inventor PARSONS, EDWINCOLLINS, RICHARDMASTERS, BRUCE
Owner SHAVER MFG