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US 4,584,913 AGranted
Compact ratchet wrench with quick-release lever
AssigneeThomas Logan
InventorGeorge T. Logan
Life of this patent
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Abstract
This invention relates to an improved "lever lock" type wrench which has ratchet characteristics and a novel construction which makes it convenient to use. The construction includes an angled and compact head portion, a quick-release lever, and fully enclosed internal working elements which protects them from grease and dirt. Furthermore, a particular geometry is disclosed which permits the minimum amount of handle rotation for the wrench jaws to achieve the next successive grip in the ratcheting mode.
Claims4
A ratchet wrench, comprising:
- (a) a stationary jaw having notches for gripping a workpiece such as a nut or bolt and two extended sideplates forming a yoke;
- (b) a handle pivotally affixed to said stationary jaw, said handle having a narrow extended portion lying between said stationary jaw sideplates;
- (c) a first pin member connecting said stationary jaw and said handle;
- (d) a moveable jaw opposite said stationary jaw and having notches compatible with the notches on the stationary jaw, said moveable jaw having a narrow extended portion lying between said stationary jaw sideplates and being pivotably affixed thereto;
- (e) a second pin member connecting said moveable jaw and said stationary jaw;
- (f) a nose lever extending from said moveable jaw between the stationary jaw sideplates;
- (g) a toe lever extending from the handle between the stationary jaw sideplates being located to frictionally engage said nose lever such that the turning of the handle will act to close the stationary jaw and moveable jaw about a workpiece such as a nut or bolt;
- (h) a resilient leaf spring member affixed between the handle and the stationary jaw;
- (i) said handle comprising three parts joined together;
- two side pieces and a center piece, said center piece formed to receive said leaf spring member, whereby said leaf spring member is partly enclosed within said handle;
- (j) a release lever formed from the extension of the stationary jaw sideplates;
- (k) said first and second pin members being located along a line tangent to the inner radius of the moveable jaw;
- and
- (l) said nose lever and said toe lever engaging at a point approximately along a first line parallel to a second line which connects the first and second pin members, said first line passing through the axis of the workpiece.
11 more elements
Dependencies are inferred from the claim text.