Michael Aaron Duncan

US Patent:

7882657, Feb 8, 2011

Filed:

Feb 6, 2008

Appl. No.:

12/012995

Inventors:

Michael A. Duncan - Mohnton PA, US
Philip G. Morton - Germantown OH, US
Christopher R. Ballard - Miamisburg OH, US

Assignee:

Deceuninck North America, LLC - Monroe OH
Viwinco, Inc. - Morgantown PA

International Classification:

E05D 15/22

US Classification:

49185, 49183, 49501

Abstract:

A single or double hung window assembly has a rectangular main frame supporting at least one rectangular sash frame for vertical sliding movement, and each frame has members formed from extrusions including rigid plastics material. A horizontal upper sash rail or member is reinforced by an elongated and continuous metal stiffening channel having a width substantially greater than its height and defining a longitudinally extending and upwardly facing undercut cavity. End portions of the stiffening channel support retractable sliding tilt latch bolts each having a snap-fit connection to a corresponding actuator slidably mounted on the upper sash rail. A sash lock member is also mounted on the upper sash rail and is secured to the stiffening channel. A pre-assembly of the stiffening channel and latch bolts is inserted through an opening in a vertical sash frame member, and stiffening channels are also inserted into other sash frame members.

US Patent:

48365190, Jun 6, 1989

Filed:

Apr 4, 1988

Appl. No.:

7/177136

Inventors:

Michael J. Duncan - Middletown DE

International Classification:

B23G 302

US Classification:

269 91

Abstract:

An improved, inexpensive machinist's clamp apparatus for holding metal workpieces during milling, drilling, shaping or the like is provided. The improved clamp apparatus has a generally "U"-shaped holder removeably affixed to the rear end of a step clamp to be used in conjunction with a step block. Through the "U"-bend is threadingly inserted a thumbscrew having a resilient endpiece affixed thereon, such as a spring or a rubber pad. When the step clamp is adjusted to the desired height on the step block, the thumb-screw is advanced such that the resilient end thereof is forced into tight holding contact with the rear vertical face of the step block, resulting in a combination of step clamp, step block and holder which is rigidly attached so that, when a workpiece is removed, the step clamp does not fall away from the step block, thereby avoiding unnecessary time delays in re-setup. Also provided is a new step block base holder for affixing the step block to the work surface. The holder provides for longitudinal and rotational adjustment of the clamp apparatus with respect to the work surface.