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US 7,254,893 B1Granted
Blade quick removal device for a handsaw
OwnerYin-Hai Huanginventor
Life of this patent
Estimating the term…
Abstract
A blade quick removal device includes an arcuate frame integrated with a front handle and a rear handle, a first hook bar under the front handle, an oscillatory second hook bar nearby the rear handle for adjustably retaining the saw blade thereon and a locking member pivoted to the lower end of the second hook bar for fastening the hook bar to a reduced bottom of the rear handle and having an axial rod and a pair of latches respectively held by a hook and a pair of retaining projections on the bottom of the rear handle.
Claims3
A handsaw comprising:
- an arcuate frame which integrates with a front handle and a rear handle and has a pair of concaves in opposing lateral sides thereof to define a triangular flat portion therebetween, a pair of stop walls and a first through hole in said flat portion, a first hook bar under said front handle and having a depression in one lateral side thereof for disposing a first retaining pin, a reduced portion at a lower end of the rear handle including at the front side thereof a hook which has a guiding surface and a retaining slot in the underside thereof, a pair of retaining projections symmetrically formed on opposing lateral sides of said rear handle;
- a second hook bar having a pair of triangular upper ends each having an aligned hole engaged with the through hole spacedly formed and engaged with the flat portion of said frame and pivotally secured by a rivet with a double-coil spring biased therebetween and a round reduced lower end having a depression in a lateral side thereof for anchoring a second retaining pin and a second through hole in a thick portion;
- a locking member having a pair of circular front ends symmetrically formed each including a crescent depression in its outer surface and each of which has an inlaid hole, a circular hole, a third through hole and a central through hole, and a shallow dishpan type rear end which has a U-shaped side wall and a pair of latches on an inner side of opposing side walls made engaged with said retaining projections of the rear handle in a snap fitting, said third through holes being engaged with the second through hole of said second hook bar and pivotally secured by a retaining rod;
- a pair of reinforcement crescent plates engaged with said crescent depression respectively each having a protrusion piece respectively pressed into said inlaid holes and an axle bush respectively pressed into said circular holes;
- an axial rod having a rolling tube wrapped on anchored into said axle bushes at two ends;
- a saw blade having an eye in each end engageable with said first and second retaining pins respectively.
3 more elements
Dependencies are inferred from the claim text.