Title: Jig-saw

Abstract: The invention is directed to a power operated jig-saw which includes a housing and an elongated saw-blade holder for holding a saw-blade. A first bearing pivotally mounts the elongated saw-blade holder in the housing. A drive imparts a reciprocating up and down movement to the elongated saw-blade holder. A cam arrangement imparts a reciprocating movement to the elongated saw-blade holder and includes a body rotatably mounted in the housing and operatively connected to the drive. The rotating body has formed thereon a continuous cam surface extending about the axis of rotation thereof. The cam arrangement also includes a carrier and a resilient member. The carrier is mounted in the housing so as to be reciprocally movable in a direction transverse to the elongated saw-blade holder and carries a bearing for slideably holding the saw-blade holder. The resilient member urges the carrier into engagement with the cam surface whereby the carrier is reciprocated in response to the rotational movement of the cam surface causing a saw-blade attached to the saw-blade holder to trace out an enclosed path.

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Other info:

Inventors: Pfanzer, Gerhard (Camberg, DE, US)

Application Number: 848057
Filing Date: 1977-11-03
Publication_date: 1979-02-06
Assignee: The Black and Decker Manufacturing Company (Towson, MD)
Primary Class(es): 30/393 74/50
Other Classes:
US Patent Ref:

3236111	Feb, 1966	Naslund	74/50.
3269197	Aug, 1966	Enders	74/50.
3457796	Jul, 1969	Leach et al.	30/393.
3890708	Jun, 1975	Bauer	30/393.
3978862	Sep, 1976	Morrison	30/393.
4031763	Jun, 1977	Eisenberg	74/50.

Other Refs:
Primary Examiner: Peters, Jimmy C.
Assistant Examiner:
Attorney: Ottesen; Walter, Bloom; Leonard, Murphy; Edward D.