Charles E Duncan

US Patent:

53320719, Jul 26, 1994

Filed:

Mar 9, 1993

Appl. No.:

8/028393

Inventors:

Charles W. Duncan - Costa Mesa CA

Assignee:

SINCO Incorporated - East Hampton CT

International Classification:

F16F 712

US Classification:

188371

Abstract:

A shock absorber which is especially adapted for use in conjunction with a horizontal safety cable plasticly deforms under the impact load of a falling worker. The shock absorber has a break away housing so that upon inspection, the shock can be identified if it has been subjected to an impact. The absorber is also configured to impart a tautness to the safety cable and visually indicate the attainment of the preferred cable pre-tension force.

US Patent:

48921696, Jan 9, 1990

Filed:

Feb 21, 1989

Appl. No.:

7/313089

Inventors:

Charles W. Duncan - Costa Mesa CA

Assignee:

Sinco, Inc. - East Hampton CT

International Classification:

E04G 2130
E04G 2132

US Classification:

182138

Abstract:

A perimeter debris net lifting system employs a plurality of lifting units which support a debris net for a high rise-type construction structure. The lifting units comprise a pair of frame assemblies which are slidably coupled and essentially scale the structure to raise the debris net as construction progresses. Each of the frame assemblies are independently mountable to two floors of the structure. Each lifting unit is vertically displaced by disengaging one of the frame assemblies from its mounting engagement and lifting the frame assembly while the other frame assembly remains securely fixed to the structure. The debris net remains fully extended and functional during the vertical lifting process.

US Patent:

52996549, Apr 5, 1994

Filed:

Feb 28, 1992

Appl. No.:

7/843582

Inventors:

Charles W. Duncan - Costa Mesa CA

Assignee:

Sinco Incorporated - East Hampton CT

International Classification:

E04G 2100

US Classification:

182138

Abstract:

A horizontal safety net support system which is especially adaptable for high-rise building renovation projects employs a collapsable wind brace and a retractable support arm section. The wind brace includes a pair of restraining tubes which are pivotally connected and are maintained in a linear configuration under the force of a spring. A pre-established force applied to the wind brace will result in the wind brace folding to a collapsed position to permit erection of the support arm for cleaning or installation purposes.

US Patent:

51708299, Dec 15, 1992

Filed:

Feb 19, 1991

Appl. No.:

7/656498

Inventors:

Charles W. Duncan - Costa Mesa CA
John F. Starr - Middle Haddam CT
John B. Ebbesmeyer - Manchester CT
Barry A. Cole - Colchester CT

Assignee:

Sinco Incorporated - East Hampton CT

International Classification:

E06B 906

US Classification:

160 841

Abstract:

A rack guard for a pallet rack employs a retractable safety net. The net is clipped to carriers which traverse along vertical tracks offset from the pallet rack. The tracks are pivotally mounted with respect to the pallet rack to permit pivotal displacement of the tracks to a position adjacent the support posts of the rack.

US Patent:

49628283, Oct 16, 1990

Filed:

Jan 4, 1990

Appl. No.:

7/461010

Inventors:

Charles W. Duncan - Costa Mesa CA

International Classification:

E04G 310
E04G 2130
E04G 2132

US Classification:

182 82

Abstract:

A perimeter debris net lifting system employs a plurality of lifting units which support a debris net for a high rise-type construction structure. The lifting units comprise a pair of frame assemblies which are slidably coupled and essentially scale the structure to raise the debris net as construction progresses. Each of the frame assemblies are independently mountable to two floors of the structure. Each lifting unit is vertically displaced by disengaging one of the frame assemblies from its mounting engagement and lifting the frame assembly while the other frame assembly remains securely fixed to the structure. The debris net remains fully extended and functional during the vertical lifting process. The lifting units may also mount one or more scaffolding frames and a vertical debris net.