US 3,994,192 AGranted

Circular saw apparatus including safety locking means

AssigneeChr. Eisele Maschinenfabrik GmbH & Co. KG

InventorPaul Faig

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Abstract

Circular saw apparatus is disclosed of the type including saw frame means pivotally connected with a base for pivotal movement between a normal non-cutting position and a cutting position, characterized by the provision of safety locking means for releasably locking the saw frame in the non-cutting position. The locking means includes a stationary locking member connected with the base, a movable locking member movably connected with the saw frame, and spring means normally biasing the movable locking member into engagement with a locking surface on the stationary locking member. Releasing means are provided for releasing the movable locking member from engagement with the locking surface, said releasing means being associated with the hand lever means provided for swinging the saw frame toward the cutting position.

In a circular saw apparatus including a base (20) including bearing block means (16);

and circular saw means including a frame (10) pivotally connected with said bearing block means for movement between cutting and non-cutting positions relative to said base, a circular saw (12) connected with said frame for rotation about an axis parallel with the frame pivot axis, means on said frame for rotatably driving said circular saw, means biasing said frame toward the non-cutting position, and hand lever means (30) connected with said frame for pivoting the frame from the non-cutting position toward the cutting position;
the improvement which comprises
locking means for releasably locking said frame in the non-cutting position relative to said base, said locking means including
a. a stationary locking member (34) connected with said bearing block means, said stationary member having thereon a curved convex locking surface (36) concentric with the pivot axis of said frame, said locking surface containing an end abutment surface (46) angularly arranged relative to said curved locking surface;
b. a movable locking member (38) connected with one end of said handle means adjacent said stationary locking member for axial displacement relative to said handle means;
c. spring means (42) biasing said movable locking member axially relative to said handle means toward normal frictional end engagement with said convex surface during pivotal displacement of said frame between the non-cutting and cutting positions, said end abutment surface being so arranged that when the frame is in the non-cutting position, said movable locking member is axially displaced by said spring means toward an extended position in which a lateral surface of the movable locking member is in locking engagement with said stationary abutment surface;
and
d. means (44) for axially retracting said movable locking member from its extended position, thereby to release said frame for pivotal displacement toward the cutting position.

5 more elements

Facts

Application

05/580,738Filed 27 May 1975

Priority

DT 7420476[U]14 Jun 1974

Granted

30 Nov 1976

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

B23D 45/042
With a circular saw blade or the stock carried by a pivoted lever: with the saw blade carried by a pivoted lever
B23Q 1/30
Characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of…:…
B27G 19/02
Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws: for circular saws
Y10S 83/01
Cutting: safety devices

Abstract

Claims7