Patent US3774827A successfully refreshed from Google Patents.
US3774827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power rodder construction
Assignee: CHAMPION CORP
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Filing: 1972-06-01
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Granted: 1973-11-27
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Expires: 1992-06-01
Abstract
Abstract An apparatus for extending and retracting rod and similar lengths of material, the lengths being moved between opposed driven rolls. Drive means for the rolls comprise first and second motor means with each motor means serving to operate a distinct set of rolls. Control means are provided whereby one set of rolls is driven upon extension of the lengths with both set of rolls being driven during retraction of the lengths whereby considerably increased power is available during retraction. Means are provided for automatically varying the engaging pressure of the drive rolls in response to power requirements.
Inventors
- 👤 M Graybeal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:39
CPC Classifications
H; H02; H02G; H02G1/00; H02G1/06; H02G1/08
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
274 words
In an apparatus for extending and retracting lengths of rod, cable and the like, wherein the lengths are moved between opposed driven rolls which engage the lengths, the improvement wherein said rolls are divided into two sets with each set including at least one pair of upper and lower rolls, drive means comprising first motor means for the first set of rolls and second motor means for the second set of rolls, control meaNs for said motor means, means for locating said control means in a first position to operate said first motor means to drive said first set of rolls in a direction to achieve extension of said lengths, location of said control means in said first position excluding operation of said second set of rolls, and means for locating said control means in a second position to thereby automatically operate both of said motor means to drive both of said sets of rolls simultaneously in a direction to achieve retracting of said lengths, and wherein said motors are hydraulically driven, said control means including a control valve, hydraulic lines extending from said control valve to said motor means and back to said control valve, one-way valve means in one of said lines, a source of hydraulic fluid, location of said control valve in one position directing fluid from said source to said first motor means, said one-way valve means blocking passage of fluid from said control valve to said second motor means, and location of said control valve in a second position directing fluid to each of said motor means through a line other than the line including said one-way valve means.
Claim 2
Dependent Claim
274 words
In an apparatus for extending and retracting lengths of rod, cable and the like, wherein the lengths are moved between opposed driven rolls which engage the lengths, the improvement wherein said rolls are divided into two sets with each set including at least one pair of upper and lower rolls, drive means comprising first motor means for the first set of rolls and second motor means for the second set of rolls, control meaNs for said motor means, means for locating said control means in a first position to operate said first motor means to drive said first set of rolls in a direction to achieve extension of said lengths, location of said control means in said first position excluding operation of said second set of rolls, and means for locating said control means in a second position to thereby automatically operate both of said motor means to drive both of said sets of rolls simultaneously in a direction to achieve retracting of said lengths, and wherein said motors are hydraulically driven, said control means including a control valve, hydraulic lines extending from said control valve to said motor means and back to said control valve, one-way valve means in one of said lines, a source of hydraulic fluid, location of said control valve in one position directing fluid from said source to said first motor means, said one-way valve means blocking passage of fluid from said control valve to said second motor means, and location of said control valve in a second position directing fluid to each of said motor means through a line other than the line including said one-way valve means.
Claim 3
Dependent Claim
16 words
An apparatus in accordance with claim 1 including a single lever for operating said control valve.
Claim 4
Dependent Claim
64 words
An apparatus in accordance with claim 2 including a separate motor menas, separate hydraulic lines extending between said separate motor means and said control valve, and a cage mounted on said apparatus for holding said lengths, said separate motor means being adapted to rotate said cage during extension of said lengths, the rotation of the cage imparting rotation to said lengths during such extension.
Claim 5
Dependent Claim
90 words
An apparatus in accordance with claim 1 including a separate hydraulic motor, means supporting said first motor means, said separate hydraulic motor being connected to said supporting means for rotation of the supporting means about the axis of said rod, and wherein said control means include means for cutting off a supply of hydraulic fluid to said separate hydraulic motor when said control valve is rotated in said second position, and means for directing hydraulic fluid to said separate motor means when said control valve is in said one position.
Claim 6
Dependent Claim
18 words
An apparatus in accordance with claim 1 wherein said first and second hydraulic motor are connected in parallel.
Claim 7
Dependent Claim
194 words
In an apparatus for extending and retracting lengths of rod, cable and the like, wherein the lengths are moved between opposed driven rolls which engage the lengths, the improvement wherein said rolls are divided into two sets with each set including at least one pair of upper and lower rolls, drive means comprising first motor means for the first set of rolls and second motor means for the second set of rolls, said drive rolls being mounted on individual supporting shafts, each set of rolls including a driven roll and an idler roll, and wherein said second motor means comprise a separate motor at each end of each driven shaft whereby each such driven shaft is driven by two motors, control means for said motor means, means for locating said control means in a first position to operate said first motor means to drive said first set of rolls in a direction to achieve extension of said lengths, and means for locating said control means in a second position to operate both of said motor means to drive both of said sets of rolls simultaneously in a direction to achieve retracting of said lengths.
Claim 8
Dependent Claim
194 words
In an apparatus for extending and retracting lengths of rod, cable and the like, wherein the lengths are moved between opposed driven rolls which engage the lengths, the improvement wherein said rolls are divided into two sets with each set including at least one pair of upper and lower rolls, drive means comprising first motor means for the first set of rolls and second motor means for the second set of rolls, said drive rolls being mounted on individual supporting shafts, each set of rolls including a driven roll and an idler roll, and wherein said second motor means comprise a separate motor at each end of each driven shaft whereby each such driven shaft is driven by two motors, control means for said motor means, means for locating said control means in a first position to operate said first motor means to drive said first set of rolls in a direction to achieve extension of said lengths, and means for locating said control means in a second position to operate both of said motor means to drive both of said sets of rolls simultaneously in a direction to achieve retracting of said lengths.
Claim 9
Dependent Claim
35 words
An apparatus in accordance with claim 6 wherein said second motor means comprise hydraulic motors, and including a common source of hydraulic fluid for said hydraulic motors whereby the operation of the motors is synchronized.
Claim 10
Dependent Claim
71 words
An apparatus in accordance with claim 7 wherein said first motor means comprise hydraulic motors, said source also providing hydraulic fluid for said first motor means, said control means applying said source only to the hydraulic motors of said first motor means during extension of said lengths, and said control Means applying said source to the hydraulic motors of both the first and second motor means during retraction of said lengths.
Claim 11
Dependent Claim
160 words
In an apparatus for extending and retracting lengths of rod, cable and the like, wherein the lengths are moved between opposed driven rolls which engage the lengths, the improvement wherein said rolls are divided into two sets with each set including at least one pair of upper and lower rolls, drive means comprising first motor means for the first set of rolls and second motor means for the second set of rolls, control means for said motor means, means for locating said control means in a first position to operate said first motor means to drive said first set of rolls in a direction to achieve extension of said lengths, means for locating said control means in a second position to operate both of said motor means to drive both of said sets of rolls simultaneously in a direction to achieve retracting of said lengths, and including means for automatically varying the pressure applied by the rolls to said lengths.
Claim 12
Dependent Claim
160 words
In an apparatus for extending and retracting lengths of rod, cable and the like, wherein the lengths are moved between opposed driven rolls which engage the lengths, the improvement wherein said rolls are divided into two sets with each set including at least one pair of upper and lower rolls, drive means comprising first motor means for the first set of rolls and second motor means for the second set of rolls, control means for said motor means, means for locating said control means in a first position to operate said first motor means to drive said first set of rolls in a direction to achieve extension of said lengths, means for locating said control means in a second position to operate both of said motor means to drive both of said sets of rolls simultaneously in a direction to achieve retracting of said lengths, and including means for automatically varying the pressure applied by the rolls to said lengths.
Claim 13
Dependent Claim
42 words
An apparatus in accordance with claim 9 wherein said rolls are mounted on shafts, and wherein said pressure applying mans engage the shafts of at least one roll in each set during operation when the rolls of that set engage said lengths.
Claim 14
Dependent Claim
54 words
An apparatus in accordance with claim 10 wherein said pressure applying means comprise hydraulic cylinder and piston assemblies, the pistons of the respective assemblies engaging roll shafts for applying force thereto, and means for varying the hydraulic pressure within said cylinders in proportion to the driving force of said first and second motor means.
Claim 15
Dependent Claim
64 words
An apparatus in accordance with claim 11 wherein said first and second motor means comprise hydraulic motors, a source of hydraulic fluid for said motors, hydraulic lines extending between said source and said motors, and by-pass lines connected to said hydraulic lines and extending to said cylinders whereby the hydraulic pressure in the lines connected to said motors determines the pressure within said cylinders.
Claim 16
Dependent Claim
87 words
An apparatus in accordance with claim 12 wherein said control means operate to apply said source only to feed the hydraulic motors of said first motor means during extension of said lengths whereby pressure is applied only to the hydraulic cylinders associated with said first motor means, and said control means operate to apply said source to the hydraulic motors of said first and second motor means during retraction of said lengths whereby the hydrualic cylinders for all of said hydraulic motors apply pressure during such retraction.
Claim 17
Dependent Claim
48 words
An apparatus in accordance with claim 13 wherein the pistons associated with roll shafts driven by said second motor means are in retracted position when only the first motor means are being driven whereby said lengths move freely relative to the rolls driven by said second motor means.
Claim 18
Dependent Claim
44 words
An apparatus in accordance with claim 14 including spring means normally retaining said pistons in said retracted position, the pressure applied during driving of said second motor means operating to move said pistons in opposition to said spring means for engagement with said rolls.
Claim 19
Dependent Claim
240 words
In a cable placing rodder wherein means are provided for extending a length of rod, attaching a cable to the rod, and retracting the rod to thereby pull the cable into a desired position, and wherein the rod is moved between opposed driven rolls which engage the rod, a cage mounted on said rodder, said rod being stored in said cage and adapted to be removed from and returned to said cage upon extending and retracting movement of said rolls, the improvement wherein said rolls are divided into two sets with each set including at least one pair of upper and lower rolls, drive means comprising first motor means for the first set of rolls and second motor means for the second set of rolls, control means for said motor means, means for locating said control means in a first position to operate said first moTor means to drive said first set of rolls in a direction to achieve extension of said rod, location of said control means in said first position excluding operation of said second set of rolls, means for locating said control means in a second position to operate both of said motor means to drive both of said sets of rolls simultaneously in a direction to achieve retracting of said rod, and means for varying the pressure applied by said rolls to said rod whereby greater pulling force can be obtained during retraction of the rod.
Claim 20
Dependent Claim
240 words
In a cable placing rodder wherein means are provided for extending a length of rod, attaching a cable to the rod, and retracting the rod to thereby pull the cable into a desired position, and wherein the rod is moved between opposed driven rolls which engage the rod, a cage mounted on said rodder, said rod being stored in said cage and adapted to be removed from and returned to said cage upon extending and retracting movement of said rolls, the improvement wherein said rolls are divided into two sets with each set including at least one pair of upper and lower rolls, drive means comprising first motor means for the first set of rolls and second motor means for the second set of rolls, control means for said motor means, means for locating said control means in a first position to operate said first moTor means to drive said first set of rolls in a direction to achieve extension of said rod, location of said control means in said first position excluding operation of said second set of rolls, means for locating said control means in a second position to operate both of said motor means to drive both of said sets of rolls simultaneously in a direction to achieve retracting of said rod, and means for varying the pressure applied by said rolls to said rod whereby greater pulling force can be obtained during retraction of the rod.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |