Patent CH89824A successfully refreshed from Google Patents.
Patent US3574878A successfully refreshed from Google Patents.
US3574878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power rooter with safety clutch
Assignee: Melard Manufacturing Corp
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Filing: 1969-05-19
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Granted: 1971-04-13
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Expires: 1989-05-19
Abstract
Abstract A helical-wire power-driven snake is provided at its drive end with a torque-responsive safety clutch which prevents kinking or snapping of the wire or overloading or burnout of the source of rotary power. Spring-loaded clutch elements cooperating with axial grooves provide for both transmission of rotary motion and selective transmission of thrust from the power tool.
Inventors
- 👤 Harold Shames
- 👤 Sidney J Shames
- 👤 John F Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:33
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/30; E03C1/302; F; F16; F16K; F16K31/00; F16K31/44; F16K31/46; F16K31/465
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
211 words
In a power-driven flexible snake, the combination comprising: elongated flexible tube means with an elongated flexible helical wire member extending therethrough and providing drive and driven ends extending outwardly of the ends of the tube means, clutch means including a tubular driven member with gripping means thereon for selective driving securement of the tubular member to the drive end of the helical wire member, said clutch means including a driver that is separate from said driven member and which provides a shank adapted to be selectively gripped by a rotary power tool, spring-loaded clutch means drivingly interconnecting the driver and driven member and adapted to disengage the driver from the driven member upon development of an overload condition on the helical wire member, the springloaded clutch means including at least one axial groove in the tubular driven member, at least one ball member carried by the driver and arranged to move transversely of the groove between an operative position in the groove and a release position out of the groove, there being abutment elements on the driver and driven member through which axial thrust may be selectively transmitted, and the ball being movable axially in said axial groove as the abutment elements are selectively moved toward and away from each other.
Claim 2
Dependent Claim
211 words
In a power-driven flexible snake, the combination comprising: elongated flexible tube means with an elongated flexible helical wire member extending therethrough and providing drive and driven ends extending outwardly of the ends of the tube means, clutch means including a tubular driven member with gripping means thereon for selective driving securement of the tubular member to the drive end of the helical wire member, said clutch means including a driver that is separate from said driven member and which provides a shank adapted to be selectively gripped by a rotary power tool, spring-loaded clutch means drivingly interconnecting the driver and driven member and adapted to disengage the driver from the driven member upon development of an overload condition on the helical wire member, the springloaded clutch means including at least one axial groove in the tubular driven member, at least one ball member carried by the driver and arranged to move transversely of the groove between an operative position in the groove and a release position out of the groove, there being abutment elements on the driver and driven member through which axial thrust may be selectively transmitted, and the ball being movable axially in said axial groove as the abutment elements are selectively moved toward and away from each other.
Claim 3
Dependent Claim
184 words
In a power-driven flexible snake, the combination comprising: elongated flexible tube means with an elongated flexible helical wire member extending therethrough and providing drive and driven ends extending outwardly of the ends of the tube means, clutch means including a tubular driven member with gripping means thereon for selective driving securement of the tubular member to the drive end of the helical wire member, such clutch means including a driver that is separate from said driven member and which provides a shank adapted to be selectively gripped by a rotary power tool, spring-loaded clutch means drivingly interconnecting the driver and driven member and adapted to disengage the driver from the driven member upon development of an overload condition on the helical wire member, the gripping means for securement of the driven member to the helical wire member including a rigid core member which is arranged to axially enter the open end of the helical wire, and a screw member carried by the driven member and spaced from but movable transversely to said core member to clamp the helical wire member against the core member.
Claim 4
Dependent Claim
184 words
In a power-driven flexible snake, the combination comprising: elongated flexible tube means with an elongated flexible helical wire member extending therethrough and providing drive and driven ends extending outwardly of the ends of the tube means, clutch means including a tubular driven member with gripping means thereon for selective driving securement of the tubular member to the drive end of the helical wire member, such clutch means including a driver that is separate from said driven member and which provides a shank adapted to be selectively gripped by a rotary power tool, spring-loaded clutch means drivingly interconnecting the driver and driven member and adapted to disengage the driver from the driven member upon development of an overload condition on the helical wire member, the gripping means for securement of the driven member to the helical wire member including a rigid core member which is arranged to axially enter the open end of the helical wire, and a screw member carried by the driven member and spaced from but movable transversely to said core member to clamp the helical wire member against the core member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |