US4351126A — Foldable gaff hook

Claim 1

Independent Claim 260 words

A foldable gaff comprising an elongated shaft having a handle at a first end thereof; a cam plate member pivotally secured to a second end of the shaft, a curved hook secured to the cam plate member, an arcuate shaped cam surface carried by the cam plate member and having first and second spaced notches therein; an elongated longitudinal recess in the second end of the shaft, an elongated cam follower reciprocally carried in the recess, a compression spring carried in the recess for urging the cam follower outwardly against the cam surface of the cam plate member, said cam follower comprising a shaped protrusion at the outer end thereof for engaging the cam surface and complimentary with the spaced notches therein, said protrusion comprising a pair of intersecting plane surfaces, the planes defined by said plane surfaces being parallel to the pivotal axis of the cam plate member wherein in a fully open position said cam follower protrusion is seated in the first notch whereupon pressure applied to the hook toward a closed position causes the cam surface adjacent the first notch to press against one of the plane surfaces of the protrusion forcing said cam follower to retract within said recess to enable movement of the hook to a folded position wherein said cam follower protrusion is seated in the second notch, whereby an opening force applied to the hook causes the cam surface adjacent said second notch to bear against the second plane surface of the protrusion again causing the cam follower to retract within said recess.

Claim 2

Dependent Claim 260 words

A foldable gaff comprising an elongated shaft having a handle at a first end thereof; a cam plate member pivotally secured to a second end of the shaft, a curved hook secured to the cam plate member, an arcuate shaped cam surface carried by the cam plate member and having first and second spaced notches therein; an elongated longitudinal recess in the second end of the shaft, an elongated cam follower reciprocally carried in the recess, a compression spring carried in the recess for urging the cam follower outwardly against the cam surface of the cam plate member, said cam follower comprising a shaped protrusion at the outer end thereof for engaging the cam surface and complimentary with the spaced notches therein, said protrusion comprising a pair of intersecting plane surfaces, the planes defined by said plane surfaces being parallel to the pivotal axis of the cam plate member wherein in a fully open position said cam follower protrusion is seated in the first notch whereupon pressure applied to the hook toward a closed position causes the cam surface adjacent the first notch to press against one of the plane surfaces of the protrusion forcing said cam follower to retract within said recess to enable movement of the hook to a folded position wherein said cam follower protrusion is seated in the second notch, whereby an opening force applied to the hook causes the cam surface adjacent said second notch to bear against the second plane surface of the protrusion again causing the cam follower to retract within said recess.

Claim 3

Dependent Claim 54 words

A foldable gaff as set forth in claim 1 wherein said shaft is hollow and including an aperture in said shaft to receive and protect the pointed end of the hook when the hook is in a closed position and including seal means secured to the aperture to seal the inside of the shaft.

Claim 4

Dependent Claim 74 words

A foldable gaff as set forth in claim 1 wherein the intersecting plane surfaces of the cam follower protrusion intersect at substantially a right angle wherein the first plane surface is at an angle with respect to the longitudinal axis of the cam follower greater than the angle of the second plane surface resulting in less force being required to move the hook out of the closed position than out of the open position.

Claim 5

Dependent Claim 243 words

A foldable gaff comprising an elongated shaft having a handle at a first end thereof; a cam plate member pivotally secured to the second end of the shaft, a curved hook secured to the cam plate member, an arcuate cam surface carried by the cam plate member, first and second spaced right angle notches provided at each end of said cam surface, each said angle notch comprising a pair of intersecting surfaces, each said surface terminating at the cam surface; an elongated longitudinal recess in the second end of the shaft, an elongated cam follower reciprocally carried in the recess, a compression spring carried in the recess for urging the cam follower outwardly against the cam surface of the cam plate member; wherein the cam follower comprises a shaped protrusion at the outer end thereof for engaging the cam surface and being complimentary with the notches therein, the protrusion comprising a pair of intersecting right angle plane surfaces, the first plane surface being at an angle with respect to the longitudinal axis of the cam follower greater than the angle of the second plane surface whereby said first plane surface bears against the second notch when moving the hook out of the folded position and whereby said second plane surface bears against the first notch when moving the hook out of the open position, less force being required to move the hook out of the closed position than out of the open position.

Claim 6

Dependent Claim 243 words

A foldable gaff comprising an elongated shaft having a handle at a first end thereof; a cam plate member pivotally secured to the second end of the shaft, a curved hook secured to the cam plate member, an arcuate cam surface carried by the cam plate member, first and second spaced right angle notches provided at each end of said cam surface, each said angle notch comprising a pair of intersecting surfaces, each said surface terminating at the cam surface; an elongated longitudinal recess in the second end of the shaft, an elongated cam follower reciprocally carried in the recess, a compression spring carried in the recess for urging the cam follower outwardly against the cam surface of the cam plate member; wherein the cam follower comprises a shaped protrusion at the outer end thereof for engaging the cam surface and being complimentary with the notches therein, the protrusion comprising a pair of intersecting right angle plane surfaces, the first plane surface being at an angle with respect to the longitudinal axis of the cam follower greater than the angle of the second plane surface whereby said first plane surface bears against the second notch when moving the hook out of the folded position and whereby said second plane surface bears against the first notch when moving the hook out of the open position, less force being required to move the hook out of the closed position than out of the open position.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1985-09-27	1986-03-29	1986-09-28	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1989-09-27	1990-03-29	1990-09-28	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1993-09-27	1994-03-29	1994-09-28	$7700.00	Window Closed / Lapsed

Foldable gaff hook

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag