US 5,414,888 AGranted

Grip handle chuck

AssigneeAugerscope, Inc.

InventorLawrence F. Irwin

Life of this patent

Estimating the term…

Loading patent…

Abstract

An improved plumbers' tool of the type employing a helically wound coiled spring which is controllably inserted into waste lines to remove blockages. In operating the tool of the invention, a storage drum from which the clean-out spring is payed out is rotated, usually by a small electric motor, and the spring is clamped in a chucking mechanism so as to rotate with the housing. The improvement of the present tool resides in the provision of a unique actuating mechanism which provides a substantial mechanical advantage that enables the operator, using only one hand to grip a forwardly positioned stationary handle with the fingers and move a pivotally movable, rearwardly positioned handle with the heel of the hand to cause the chucking mechanism to positively engage the coiled spring in a manner to prevent slippage even under severe torque loading conditions.

Claims9

Dependent claims

A sewer clean-out tool, comprising:

(a) an elongated coiled spring;
(b) a spring housing adapted to contain said coiled spring when not in use, said housing having an opening at one side thereof for the passage of said coiled spring;
(c) a tubular spindle projecting forwardly from said housing axially of the opening, said spindle having a wedge shaped face;
(d) a tubular chuck body housing surrounding said spindle;
(e) a thrust bearing mounted within said chuck body housing for reciprocal movement therewithin, said thrust bearing being adapted to rotatably support said spindle and to impart axial movement thereto;
(f) a contractable collet chuck carried within said chuck body housing, said chuck having a wedge shaped face adapted to mateably engage said wedge shaped face of said spindle upon relative axial movement between said spindle and said chuck to contract said chuck;
(g) actuating means for imparting relative movement between said spindle and said collet chuck to cause said chuck to contract, said actuating means comprising a first stationary handle formed as a part of said chuck body housing and extending radially thereof in the region of said opening, said handle having an elongated channel-shaped, rearwardly facing opening therein, said actuating means further comprising a mutually operable lever means for causing movement of said thrust bearing, said lever means being partially receivable in said channel shaped opening of said handle and including:
(i) an actuating member connect to said chuck body housing, said actuating member having an inner end engageable with said thrust bearing and an outer end projecting into said first stationary handle, said inner end having an engagement element;
(ii) a second handle pivotally connected to said first handle for pivotal movement from a first rearward position to a second forward position, said second handle having engaging means for engaging said engagement element of said actuating member to cause said actuating member to impart movement to said thrust bearing.

6 more elements

A plumbers' tool of the character which uses an elongated coiled spring and which includes a housing in which the coiled spring can be coiled, said housing having an opening at one side for the passage of the spring, a tubular spindle projecting from the housing axially of the opening a tubular chuck body housing surrounding said spindle, a main thrust bearing mounted in the outer end of said chuck body beyond the end of said spindle, a collet chuck between said bearing and said spindle, said spindle and collet chuck having interengaging wedge faces whereby to contract said chuck upon relative movement of said bearing and spindle toward said other, a radial thrust bearing on said spindle within said chuck body housing and spaced axially inward of said thrust bearing, said chuck body housing and having an opening intermediate its ends in the region of said radial thrust bearing, the improvement comprising actuating means for actuating said chuck including:

(a) a stationary handle formed as a part of said chuck body housing and extending radially thereof in the region of said opening, said handle being channel-shaped in cross section and open on its edge facing rearwardly toward said housing;
and
(b) a manually operable lever means operably associated with said stationary handle for causing movement of said thrust bearing, said lever means comprising:
(i) an actuating member having an inner end engageable with said thrust bearing and an outer end extending into said stationary handle, said actuating member being pivotable about a pivot pin extending transversely of said stationary handle between first and second positions;
and
(ii) a movable handle pivotally connected to said stationary handle for movement between a first rearward position and a second forward position, said movable handle including engaging means for moving said actuating member between said first and second positions.

3 more elements

(a) a stationary handle formed as a part of said chuck body housing and extending radially thereof in the region of said opening, said handle being channel-shaped in cross section and open on its edge facing rearwardly toward said housing;
and
(b) a manually operable lever means operably associated with said stationary handle for causing movement of said thrust bearing, said lever means comprising:
(i) an actuating member having a generally yoke shaped inner end engageable with said thrust bearing and an outer end extending into said stationary handle, said actuating member being pivotable about a pivot pin extending transversely of said stationary handle between first and second positions;
(ii) an engagement pin connected to said inner end of said actuating member and extending transversely thereof;
and
(iii) a movable handle pivotally connected to said stationary handle for movement between a first rearward position and a second forward position, said movable handle having a slot formed therein for closely receiving said engagement pin.

4 more elements

Dependencies are inferred from the claim text.