US 10,239,190 B2Granted

Release mechanism for clamping tools

OwnerGary Tsui, Weinan Liu +1inventors

InventorsGary Tsui, Weinan Liu, Shaosheng Chen

Life of this patent

Estimating the term…

Loading patent…

Abstract

The present invention provides an improved release mechanism for clamping tools where problems of thread slipping due to worn out thread can be reduced by the structure of a plunger with a small diameter section and the engagement of the thread shaft is made more secure by the cam action on account of the shape of the plunger. A protrusion extends from a push button on a top portion of the half-threaded nut. Threads are formed on an upper portion of the hole for engaging the threaded shaft. The middle portion of the plunger is made to have a section of small diameter allowing the protrusion to be pushed downward in a normal position and allowing the protrusion to rely on the resilient power of the helical spring to push it upward into the small diameter section.

Claims7

Dependent claims

An improved release mechanism for clamping tools, comprising:

a cover plate with a housing on the top surface of the cover plate;
a cylindrical plunger placed inside the housing;
a horizontal helical spring placed inside a hollowed portion of the plunger;
a threaded shaft for engaging with a half-threaded nut having a hole;
and
a protrusion extending from a push button on a top portion of the half-threaded nut, threads formed on an upper portion of the hole for engaging the threaded shaft, wherein the middle portion of the plunger is made to have a section of small diameter allowing the protrusion to be pushed downward in a normal position and allowing the protrusion to rely on the resilient power of the helical spring to push the protrusion upward into the small diameter section, when the plunger is pushed inward to compress the horizontal helical spring, disengaging the threaded shaft, without the pitch-by-pitch turning of the shaft.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/893,433Filed 9 Feb 2018 · continuation in part
Priority: 7 Apr 2016
Published: US 2018/0161962 A114 Jun 2018
Granted: 26 Mar 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

B25B 5/10
Arrangements for positively actuating jaws: using screws
B25B 1/12
Using screws: with provision for disengagement
B25B 5/02
Clamps: with sliding jaws
B25B 5/064
With fluid drive: with clamping means pivoting around an axis perpendicular to the pressing direction