Title: Self-contained impact tool

Abstract: An impact tool, and particularly a nail driver, utilizing a vaporized combustible mixture which may be ignited upon demand to drive a piston and associated ram in a cylinder to accomplish work such as driving a nail. In a particularly preferred embodiment, a portion of the driving energy is stored and utilized to recharge the device for rapid semi-automatic demand operation. The recharge energy may be stored in, for example, a spring or in a pressurized high-pressure cylinder and the fuel stored in bulk and metered during the recharge process.

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Inventors: Smith, James E. (Boulder, CO, US)

Application Number: 532792
Filing Date: 1974-12-16
Publication_date: 1976-07-06
Assignee:
Primary Class(es): 227/10
Other Classes:
US Patent Ref:

2898893	Aug, 1959	Rohrer et al.	227/10.
3042008	Jul, 1962	Liesse	227/9.
3362602	Jan, 1968	Anstett	227/120.
3381672	May, 1968	Tobias et al.	227/10.
3850359	Nov, 1974	Obergfell	227/10.

Other Refs:
Primary Examiner: Custer, Jr., Granville Y.
Assistant Examiner:
Attorney: O'Rourke; Thomas W.