Manually actuated jack hammer专利检索-冲击压实机工程机械土方工程和土方机械专利检索查询-专利查询网

Manually actuated jack hammer

阅读：242发布：2021-02-09

专利汇可以提供Manually actuated jack hammer专利检索，专利查询，专利分析的服务。并且A manually actuated jack hammer useful as an anchor or post driver, a compactor, a pavement breaker and the like, composed of telescoped ram and barrel members, a recoil spring and a handle which when manually reciprocated will drive the ram and through the recoil action of the spring establish a systematic rhythm causing repeated impact blows with minimum applied manual energy. For low level usage such as for driving anchors into the ground, for compacting the ground or for breaking concrete, the barrel may have the driver head on the end thereof, the ram may be solid entering the open top of the barrel and impacting against the driver, the handle may be attached to the top of the ram and the recoil spring may be compressed between the top of the barrel and the top of the ram. For high level usage such as driving fence posts into the ground, the barrel may be hollow receiving the post therein, the ram may overlie the barrel with the handle attached thereto at a convenient operating level, and the recoil spring may be interposed between the top of the barrel and the top of the ram. The handle is preferably H-shaped with handle grips at the tops and bottoms of the vertical legs. Attachments may be provided to lock the barrel to the anchor, breaker tool or the like and for guiding a fence post in the hollow barrel.，下面是Manually actuated jack hammer专利的具体信息内容。

权利要求

1. A jack hammer comprising telescoped ram and guide barrel members, said barrel member slidably guiding said ram member for reciprocal movement along an elongated stroke, a driver head at one end of the barrel member having an impact surface, said ram member having a cooperatIng impact surface centered by the barrel member to engage said driver head impact surface, said impact surfaces of the ram member and driver head being interior of the telescoped ram and barrel members, an operating handle attached to the ram member adapted to be manually grasped for raising and lowering the ram member relative to the barrel member, and a recoil spring between the members effective to raise the ram member relative to the barrel member after each impact of the respective impact surfaces of the ram and barrel members, said spring having a free extended length substantially less than the stroke of the ram on the barrel to be compressed only at the bottom of the stroke before impact.

2. The jack hammer of claim 1 wherein the ram is telescoped through the open top of the barrel.

3. The jack hammer of claim 1 wherein the ram member is telescoped over the barrel member and the barrel member is hollow with an open bottom, has an anvil head at the top end thereof and receives the workpiece against said head.

4. The jack hammer of claim 1 wherein the operating handle is H-shaped having a crossbar secured to the ram.

5. The jack hammer of claim 1 wherein the barrel has a driving head secured on the bottom thereof.

6. The jack hammer of claim 1 wherein the ram member is a hollow open bottom tube, receives the guide barrel therein in sliding relation therewith along the length thereof and has a driving head secured to the top thereof.

7. A jack hammer which comprises a hollow open bottom guide tube having an anvil secured thereon closing the top end thereof, said guide tube being of larger diameter than a workpiece to be operated by said jack hammer for receiving the workpiece therein along the length thereof with anvil resting on the top end of the workpiece, a hollow elongated driving ram telescoped over said tube in sliding engagement therewith having a driving head adapted to impact against said anvil on the tube, a compression recoil spring in the hollow driving ram between the anvil and the driving head, said recoil spring having a free end and a free extended length substantially less than the stroke of the driving ram on the guide tube so as to be compressed only at the bottom of the stroke before the driving head impacts against the anvil and then becoming effective to raise the head away from the anvil, a handle secured to the driving ram and projecting laterally therefrom to be grasped by an operator in spaced relation from said ram for raising and lowering the ram to impact the head thereof against the anvil to transfer a blow to the workpiece on which the anvil rests.

8. The jack hammer of claim 7 wherein the hollow guide tube receives a fence post therein and a guide member is provided in the mouth of the tube to guide the fence post centrally of the tube.

9. The jack hammer of claim 7 wherein the handle secured to the driving ram is H-shaped with hand grips at the tops and bottoms of the vertical legs of the handle.

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Manually actuated jack hammer

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