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US 4,903,784 AGranted
Impact hammer power tool
AssigneeGlendo Corporation
InventorDonald A. Glaser
Life of this patent
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AssigneeGlendo Corporation
InventorDonald A. Glaser
Estimating the term…
An impact power tool for use in delicate hand-working operations includes a body presenting a bore and a piston received within the bore and shiftable relative thereto. An impact transmitting member is also received in the bore and is shiftable relative to the body. This impact transmitting member is positioned axially in the bore by a mounting element interposed between the impact transmitting member and the body, the mounting element being resilient relative to the body. The piston is driven along a stroke length between an impact position engaging the impact transmitting member and an extended position out of contact with the member.
An impact power tool for use in delicate hand-working operations, the tool comprising:
An impact power tool for use in delicate hand-working operations, the tool comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
Details of, or accessories for, portable power-driven percussive tools: hammer pistons; Anvils ; Guide-sleeves for pistons
Artists' machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two-dimensionally for carving,…:…
Percussive tools
Machines, apparatus or tools for artistic work
Term ended 30 Sep 2008 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present invention relates generally to impact power tools and, more particularly, to an impact power tool for use in delicate hand-working operations such as those performed by a jeweler.
2. Description of the Prior Art
A preferred embodiment of the invention is discussed below with reference to the drawing, in which:
FIG. 1 is a perspective view of an impact tool apparatus in accordance with the invention;
FIG. 2 is a plan view of a hand-held impact tool according to the invention;
Referring to the drawing, an impact power tool apparatus in accordance with the invention is shown in FIG. 1 to include a control box 10, an impact device 12, and a foot pedal 14. The impact device 12 is connected to the control box by a first conduit 16, and the foot pedal 14 is connected to the control box 10 by another conduit 18. An air compressor or other source of high pressure motive fluid provides motive fluid to the control box via a conduit 10. To operate the apparatus tool, the control box 10 is connected to the source of high pressure motive fluid such as air via a conduit 20 and the fluid is regulated to a suitable pressure by a regulator valve as indicated by a gauge 22 on the front panel of the control box 10. Thereafter, when it is desired to perform a hammering operation, the foot pedal 14 is depressed permitting a controlled amount of motive fluid to cyclically flow to and from the hand-held tool 12 to actuate a hammering action therein.
The hand-held tool 12 is shown in FIG. 2, and includes a body 24 formed of a user friendly shape having a finger gripping region 26 and a knurled region 28 rearwardly of the finger region 26. The conduit leading to the control box extends from the rear end of the tool which is provided with a closure member 30 that seals the end of the tool to prevent leakage of the fluid from the tool.
In FIG. 3, the body 24 is illustrated as having a bore 32 extending along the length thereof. The bore is threaded adjacent the rear end of the body, and includes a step 34 between a large diameter portion 36 of the bore and a small diameter portion 38 thereof.