US 5,103,565 AGranted

Blade holder for reciprocating saws

AssigneeSkil Corporation

InventorMichael Holzer, Jr.

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Abstract

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.

Claims10

Dependent claims

Apparatus for releasably retaining a saw blade to a powered mechanism including an elongated reciprocating plunger, wherein said saw blade is of the type having at least one recess in an end thereof opposite a working end, said apparatus comprising:

(a) a formation fixed to said plunger and adapted to be received within said recess of the saw blade;
(b) said plunger having a first planar surface adjacent said formation for substantial coextensive engagement with a portion of one face of the saw blade in the area of the recess thereof;
(c) clamping means including a second planar surface for substantial coextensive engagement with a portion of another face of the saw blade in the area of the recess thereof;
(d) said plunger having a longitudinally extending cavity adjacent a distal end of the plunger;
(e) said clamping means including a block-like member received within said cavity for longitudinal reciprocal movement therein;
(f) biasing means contained within said cavity and engaged with said block-like member for urging said block-like member toward the distal end of said plunger;
and
(g) camming means engaged with said block-like member and said plunger and actuated by said biasing means for forcing said second planar surface toward said first planar surface thereby to clamp the saw blade disposed therebetween, the clamping means being released by manually forcing said block-like member against said biasing means.

5 more elements

Dependencies are inferred from the claim text.