S-b Power Tool Company

Other

Robert Boschgmbh

Credo Technology Corporation

Skil Corporation

Michael Holzer

Jan Peter Houben

Jan P Houben

Daniel K Childs

Leon Bujalski

James P Orrico

Manfred Bleicher

Manfred Kirn

Justus Lamprecht

David Matzo

Joerg Dehde

Andreas Hoelderlin

Herbert Faerber

Gerd Hahn

Alex Gawron

A wrenchless clamp assembly is provided to secure a tool disc, such as a circular saw blade, to a shaft of a power tool. The blade clamp assembly includes an outer flange positionable against an outer side of the blade and a manually tightenable click bolt that includes a movable click member operable to selectively engage the outer flange for rotationally locking or unlocking the bolt. In an embodiment, the click member moves alternatingly between axially engaged and disengaged positions according to sequential rotational increments of the click member relative to the bolt body. Accordingly, the click bolt can be installed by hand and rotationally locked without a need for high torque, and the click bolt can be easily removed by hand when the click member is moved to the disengaged position, axially free from the outer flange. In an embodiment, the click bolt permits limited torque applied during installation.

Wrenchless blade clamp assembly

A wedging clamp assembly is provided for retaining a saw blade. A housing defining a vertical cavity therein is included in the assembly. The cavity includes a top end and a bottom end tapered with respect to the top end. Extending through a bottom end of the housing is a saw blade passageway included in the bottom end of the cavity. Disposed inside the cavity is a saw blade retention mechanism. A piston is further disposed within the cavity. The saw blade retention mechanism is configured for lockingly retaining a saw blade upon insertion into the passageway, thus, causing the piston to be biased against the bottom end of the cavity. At least one locking element is further included in the saw blade retention mechanism, and such locking element is disposed in the cavity for engaging the bottom tapered end. A wedging clamping force exerted by the at least one locking element is applied to the saw blade, and such force renders the saw blade immobile relative to the housing. The saw blade retention mechanism is configured to release the blade when the biasing force on the piston is overcome by an opposing force applied to the piston, thus, releasing the wedging clamping force.

Wedging blade clamp for scroll saw

A circular saw includes a clutch assembly to surround the rotating blade shaft of the saw. The blade shaft is rotated by a shaft having a gear at one end. The clutch assembly includes a clutch gear to engage with the rotating pinion. The clutch gear is held to the blade shaft by a shaft washer that has a frictional material laminated to one end. The shaft washer is pressed to the clutch gear by spring washers.

Clutch assembly for use with a circular saw

Manually driven machine

The blade holder includes a mounting portion for attachment to the reciprocating plunger of a power saw. The blade holder also includes an integral exposed portion provided with a slot for receiving a substantial portion of the shank of the blade. The slot is dimensioned with respect to the blade shank such that an edge of the blade shank projects from the slot. The exposed portion of the blade holder includes an external surface in opposed relationship with the slot. A resiliently biased wedging washer engages the exposed edge of the blade and the external surface for holding the blade in place.

Wrenchless holder for working tools

In the first embodiment, the distal end of a reciprocating plunger of a power saw includes a longitudinally extending cavity receiving a block-like wedge member. A planar wall of the cavity and a planar face of the wedge member are arranged for substantial coextensive engagement with respective opposed faces of the saw blade. A spring in the cavity engages the wedge member for urging the same outwardly of the cavity. A pin extends through the wedge and has its opposite ends received in slots in opposed walls of the plunger. These slots are inclined with respect to the longitudinal axis of the plunger and cooperate with the pin to form a cam to urge the planar surfaces into clamping engagement with the blade under the influence of the spring. The blade may be released by forcing the wedge inwardly of the cavity under finger pressure. In a second embodiment, a similar block-like wedge member cooperates with a U-shaped member mounted on the plunger. An exterior planar wall of the plunger and a planar face on the inside of the bight portion of the U-shaped member are arranged for respective coextensive engagement with opposed faces of a saw blade for holding the same in place under the influence of a spring which cooperates with cam constituted by a pin and an inclined slot in the block-like wedge member.

Blade holder for reciprocating saws

Growing community of inventors

Wauconda, IL, United States of America

Michael Holzer