Fred E Silva

US Patent:

7448823, Nov 11, 2008

Filed:

Sep 28, 2004

Appl. No.:

10/954138

Inventors:

Fred Silva - San Lorenzo CA, US

International Classification:

F16G 13/06

US Classification:

403349, 59 85, 59 86, 403325

Abstract:

A spring loaded quick release pin and tubular receiver with a retainer pin configured to secure the quick release pin in a shackle, clevis, yoke or forked rod end. The receiver is welded to a shackle or cast with the shackle as a single body. One end of the quick release pin has aligned J slots that engage the retainer pin positioned in the receiver with a clockwise twist. The other end of the quick release pin has a cap and a spring loaded sleeve that biases the cross pin against outside of the second leg of the shackle. The spring bias keeps the short leg of the J slot engaged with the retaining pin. The quick release pin is removed with a push and counter clockwise twist. The invention includes a kit with a receiver, a bushing and a quick release pin for installing or retrofitting existing shackles.

US Patent:

61319767, Oct 17, 2000

Filed:

Dec 13, 1999

Appl. No.:

9/459871

Inventors:

Fred D. Silva - San Lorenzo CA

International Classification:

B66C 166

US Classification:

294 97

Abstract:

A tool for quickly coupling a crane hook to a dovetailed socket attached to a load consists of a heavy frame with a plate that pivots out on bushings near the lower end of the frame. Both the frame and pivoting plate have outward slanting surfaces at the lower ends that engage the dovetailed socket when the plate is pivoted up against the frame and they are locked together by a crane hook passing through aligned holes through both the plate and frame.

US Patent:

43044328, Dec 8, 1981

Filed:

Mar 10, 1980

Appl. No.:

6/128669

Inventors:

Fred D. Silva - San Lorenzo CA

Assignee:

Cavaz, Hanlon & Silva - San Leandro CA

International Classification:

B66C 166

US Classification:

294 93

Abstract:

A device for lifting a cover plate, the cover plate having a hole therein with opposed beveled surfaces, preferably at the center of gravity of the plate, which device includes a lifting element having an eye extended above laterally expanded, beveled portions, the beveled portions being slightly shallower than the thickness of the plate and of dimensions adapted to correspond in size and angle with the beveled surfaces of the plate.