Effort-saving gardening shears

Details Effort-saving gardening shears Effort-saving gardening shears

2006-10-14

2008-11-25

Prone, Jason D (Department: 3724)

Cutlery

Cutting tools

Plural cooperating blades

C030S251000

Reexamination Certificate

active

07454837

ABSTRACT:
A pair of effort-saving shears primarily comprises: a first shear element having a combining portion with a pivot hole and a shear element combining hole thereon, and a first handle further attached to the first shear element; a second shear element having combining portion with a shear element combining hole; a handle shaft axially positioned in a second handle and having a combining portion at one end; an effort-saving transmission assembly including a toothed block fixed on one side of the combining portion of the handle shaft, and a toothed hole provided on the combining portion of the second shear element, wherein the toothed hole enclose and partially engage the toothed block by parts of the teeth thereof; and wherein the combining portion of the first shear element overlaps the combining portion of the second shear element; a pivot member, piercing through said pivot holes to be placed between the toothed hole and the toothed block; and a shear element combining pin piercing through said shear element combining pin holes.

REFERENCES:
patent: 2727417 (1955-12-01), Eifel
patent: 2816359 (1957-12-01), Hogue et al.
patent: 3688405 (1972-09-01), Dutra et al.
patent: 4241503 (1980-12-01), Sugiyama
patent: 6311588 (2001-11-01), St. John et al.
patent: 6829829 (2004-12-01), Huang
patent: 7127819 (2006-10-01), Huang
patent: 2003/0079576 (2003-05-01), Lo
patent: 2006/0277764 (2006-12-01), Hsien

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