US 2007/0182169 A1 · Cylinder lock having improved torsional strength

Abstract

A cylinder lock includes a latch retractor housing having inner and outer cover plates, inner and outer drive spindles extending respectively through the inner and outer cover plates, a sleeve surrounding the outer drive spindle and having a flange contacting the outer cover plate, an outer shell surrounding the inner drive spindle and the latch retractor housing, and at least one rigid coupling member or tube disposed within the outer shell and engaging and coupling together the inner and outer cover plates and the flange, thereby reinforcing the outer drive spindle and the latch retractor housing and increasing torsional and compression strengths thereof. A reinforcing ring is further provided to couple the outer drive spindle to the outer handle for reinforcement.

Claims15

Dependent claims

A cylinder lock comprising:

a latch retractor adapted to be connected to a latch;
a latch retractor housing receiving said latch retractor and having an inner cover plate;
inner and outer drive spindles extending into said latch retractor housing to operate said latch retractor, said inner drive spindle extending through said inner cover plate;
a sleeve connected to said latch retractor housing and surrounding said outer drive spindle, said sleeve having a flange projecting radially from said sleeve and opposite to said inner cover plate;
an outer shell surrounding said inner drive spindle and associated with said sleeve to encase said latch retractor housing;
and
at least one rigid coupling member disposed within said outer shell and engaging said inner cover plate and said flange, said rigid coupling member being offset from and being substantially parallel to a rotation axis of said inner and outer drive spindles.

4 more elements

Dependencies are inferred from the claim text.

Cylinder lock having improved torsional strength

Life of this patent

Cylinder lock having improved torsional strength

Life of this patent

Abstract

Claims15