Jig saw with two-piece shoe
AssigneeBlack & Decker Inc.
InventorsDavid W. Weiford, Robert I. Somers
Life of this patent
Estimating the term…
Abstract
A hand-held, fan-cooled motor drive jig saw with a two-piece, tiltable shoe assembly having a reversible, phenolic resin base portion with a wide recess for scrolling and a narrow recess for straight cuts. The base is connected to the shoe cover independent of the attachment of the cover to the saw housing to maintain a pre-selected tilt angle. Coolant air exhausted from the saw housing is channeled through flow passages in the shoe assembly to outlet ports in the shoe assembly to provide debris-clearing air streams oriented parallel to the workpiece surface and perpendicular to the cutting direction. The housing exhaust port is flow-connected to the shoe assembly through complementary sliding surfaces at the point of attachment.
Claims23
Apparatus for use with a jig saw of the type having a reciprocating blade driven by a air-cooled motor and a housing with an exhaust port for the cooling air, the apparatus comprising:
- a shoe connectable to the saw housing for engaging the workpiece, said shoe having a shoe portion proximate the location of cutting contact between the saw blade and the workpiece;
- and
- cooling air guide means associated with said shoe for receiving cooling air from the exhaust port, channeling said received air to said shoe proximate portion, and directing said channeled air toward said cutting location to be incident upon said cutting location at an angle substantially different from 0.degree. with respect to the axis of reciprocation of the blade, whereby debris resulting from the sawing operation is blown clear of said cutting location.
Apparatus for use with a jig saw of the type having a reciprocating blade driven by an air-cooled motor and a housing with an exhaust port for the cooling air, the apparatus comprising:
- a shoe connectable to the saw housing for engaging the workpiece, said shoe having a shoe portion proximate the location of cutting contact between the saw blade and the workpiece;
- and
- cooling air guide means associated with said shoe for receiving cooling air from the exhaust port, channeling said received air to said shoe proximate portion, and directing said channeled air toward aid cutting location, whereby debris resulting from the sawing operation is blown clear of said cutting location,
- wherein said air guide means inclues a shoe surface configured to matingly contact the portion of the saw housing surrounding the exhaust port and an inlet port formed in said shoe surface to receive the exhausted cooling air,
- said apparatus further including means associated with said shoe for selectively tilting said shoe relative to the saw axis for making angled cuts, and wherein said mating surface is configured for continuous sliding contact with the saw housing for maintaining flow interconnection between the exhaust port and said inlet port.
Apparatus for use with a jig saw of the type having a reciprocating blade driven by an air-cooled motor and a housing with an exhaust port for the cooling air, the apparatus comprising:
- a shoe connectable to the saw housing for engaging the workpiece, said shoe having a shoe portion proximate the location of cutting contact between the saw blade and the workpiece;
- and
- cooling air guide means associated with said shoe for receiving cooling air from the exhaust port, channeling said received air to said shoe proximate portion, and directing said channeled air toward said cutting location, whereby debris resulting from the sawing operation is blown clear of said cutting location,
- wherein said cooling air guide means includes said shoe having a hollow interior forming an exhaust air receiving chamber, inlet means connecting the exhaust port to said chamber, and outlet means connecting said chamber to said shoe portion proximate the cutting location.
Apparatus for use with a jig saw of the type having a reciprocating blade driven by an air-cooled motor and a housing with an exhaust port for the cooling air, the apparatus comprising:
- a shoe connectable to the saw housing for engaging the workpiece, said shoe having a shoe portion proximate the location of cutting contact between the saw blade and the workpiece;
- and
- cooling air guide means associated with said shoe for receiving cooling air from the exhaust port, channeling said received air to said shoe proximate portion, and directing said channeled air toward said cutting location, whereby debris resulting from the sawing operation is blown clear of said cutting location,
- wherein said proximate shoe portion partially surrounds the cutting location and wherein said cooling air guide means includes a plurality of outlet ports fromed in said proximate shoe portion and having respective axes intersecting the cutting location.
Shoe apparatus for a jig saw of the type having a reciprocating blade drive by an air-cooled motor, and a housing with an exhaust port for the cooling air, the apparatus comprising:
- a generally planar base having a smooth, low friction workpiece-engaging surface;
- and
- a cover detachably connected to said base opposite said surface and having a raised portion defining in conjunction with said base an air chamber, said cover further including
- (i) inlet means for connecting said air chamber to the saw exhaust port for receiving exhaust air from the air-cooled motor, and
- (ii) outlet means connected to said chamber for directing the received exhausted cooling air toward the location of cutting contact between the saw blade and the workpiece to clear cutting debris.
A jig saw comprising:
- a housing;
- a blade assembly attached to said housing the blade assembly including a blade extending outside the housing for engaging a workpiece;
- an electric motor connected to said blade assembly for reciprocating said blade member along an axis;
- means for supplying air for cooling said motor, said cooling air supply means including an exhaust port in said housing;
- a shoe connected to said housing for engaging the workpiece, said shoe having a shoe portion proximate the location of cutting contact between the saw blade and the workpiece;
- and
- cooling air guide means associated with said shoe for receiving cooling air from said housing exhaust port, channeling said received air to said shoe portion, and directing said channeled air toward said cutting location, whereby debris resulting from the sawing operation is blown clear of said cutting location.
Apparatus for use with a jig saw of the type having a reciprocating blade extending from a housing, the apparatus comprising:
- a shoe assembly for engaging the workpiece to be cut, said shoe assembly further including
- a cover attachable to said housing,
- a base having a workpiece-engaging surface and a pair of opposed blade-receiving recesses, the width of one of said recesses being substantially smaller than the width of the other to suppress the formation of splinters, and
- means for connecting said base to said cover to selectively position one or the other of said recesses for receiving the blade.
Dependencies are inferred from the claim text.