Heavy duty jig saw
OwnerHans Bieriinventor
Life of this patent
Estimating the term…
Abstract
The Present heavy duty jig saw is constructed for cutting through walls of concrete, masonry, and the like. For this purpose a somewhat elongated suction bell carries a guide bar secured to one longer side of the bell. The guide bar in turn carries tool carrier means which are movable back and forth along the guide bar by a separate hydraulic drive. The tool carrier supports a tool head which is reciprocable by a second hydraulic drive. The suction bell is provided with a sealing skirt around its open edge and preferably adjustable legs secured to the bell limit the elastic deformation of the sealing skirt.
Claims8
A jig saw comprising a first unit including base vacuum bell means, elastically flexible sealing skirt means secured to said bell means to face any supporting surface, elongated guide means rigidly secured to said bell means to extend substantially in parallel to said supporting surface, tool carrier means including a drive head movably secured to said elongated guide means, first hydraulic drive means as part of said tool carrier means for producing a reciprocating tool movement, separate second hydraulic drive means operatively connected to said tool carrier means for moving said tool carrier means along said elongated guide means, a second unit including vacuum pump means as well as hydraulic pump located remote from said first unit, and conduit means operatively interconnecting said first and second units.
Dependencies are inferred from the claim text.