US3706244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrenching apparatus and method
Assignee: NSW Corp Inc
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Filing: 1971-03-01
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Granted: 1972-12-19
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Expires: 1991-03-01
Abstract
Abstract A wrenching apparatus useful in tightening and loosening threaded connectors such as nuts or bolts which are closely adjacent, including one portion which is arranged for mounting over a nut which is to be rotated and another portion which is arranged for mounting over an adjacent nut and which is arranged to prevent rotation thereof. Means in the form of an hydraulic cylinder is interposed between the two portions which, upon actuation causes rotation of one portion relative to the other and thereby causes rotation of the nut which is being loosened or tightened. The method includes steps of placing a wrench over one of the nuts and an anchor and reaction plate over an adjacent nut and exerting a power force between the two portions, whereby the wrench is rotated thereby turning the first nut.
Inventors
- 👤 Claude H Wilmeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:48
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/16; E21B19/167; B; B25; B25B; B25B21/00; B25B21/002; B25B21/004; B25B21/005; B25B23/00; B25B23/0078; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49764; Y10T29/49766; Y10T29/49826
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
212 words
In apparatus for wrenching one of a plurality of adjacent threaded connectors, the combination comprising: a first member having a portion thereof arranged for positioning over a first one of said threaded connectors and having means for limiting rotation of said first member; a wrench having one end thereof arranged for positioning over another of said threaded connectors which is to be rotated; and, means cooperative with said first member and said wrench for exerting a relative force therebetween, said means including a double acting cylinder and piston assembly operably connected at one end thereof to said first member and having the other end thereof arranged to contact said wrench of said cylinder and piston assembly being arranged to extend when a fluid is applied against a first end of said piston and being arranged to retract when a fluid is applied against the second end thereof; and, fluid flow control means for applying a first fluid of a first pressure magnitude against said second end of said piston and for selectively and simultaneously applying a second higher pressured fluid against said first end of said piston; whereby said double acting cylinder is continually urged toward the retracted position in the absence of selective application of said second higher pressured fluid thereto.
Claim 2
Dependent Claim
212 words
In apparatus for wrenching one of a plurality of adjacent threaded connectors, the combination comprising: a first member having a portion thereof arranged for positioning over a first one of said threaded connectors and having means for limiting rotation of said first member; a wrench having one end thereof arranged for positioning over another of said threaded connectors which is to be rotated; and, means cooperative with said first member and said wrench for exerting a relative force therebetween, said means including a double acting cylinder and piston assembly operably connected at one end thereof to said first member and having the other end thereof arranged to contact said wrench of said cylinder and piston assembly being arranged to extend when a fluid is applied against a first end of said piston and being arranged to retract when a fluid is applied against the second end thereof; and, fluid flow control means for applying a first fluid of a first pressure magnitude against said second end of said piston and for selectively and simultaneously applying a second higher pressured fluid against said first end of said piston; whereby said double acting cylinder is continually urged toward the retracted position in the absence of selective application of said second higher pressured fluid thereto.
Claim 3
Dependent Claim
131 words
In apparatus for wrenching one of a plurality of adjacent threaded connectors, the combination comprising: a first member having a portion thereof arranged foR positioning over a first one of said threaded connectors and having means for limiting rotation of said first member; a wrench having one end thereof arranged for positioning over another of said threaded connectors which is to be rotated; an hydraulic cylinder and piston assembly having one end thereof operably connected to said first member and having the other end thereof arranged to contact said wrench for exerting a relative force therebetween; and, means for adjusting the effective distance between said operable connection of said cylinder and piston assembly to said first member and said point of contact of said cylinder and piston assembly on said wrench.
Claim 4
Dependent Claim
131 words
In apparatus for wrenching one of a plurality of adjacent threaded connectors, the combination comprising: a first member having a portion thereof arranged foR positioning over a first one of said threaded connectors and having means for limiting rotation of said first member; a wrench having one end thereof arranged for positioning over another of said threaded connectors which is to be rotated; an hydraulic cylinder and piston assembly having one end thereof operably connected to said first member and having the other end thereof arranged to contact said wrench for exerting a relative force therebetween; and, means for adjusting the effective distance between said operable connection of said cylinder and piston assembly to said first member and said point of contact of said cylinder and piston assembly on said wrench.
Claim 5
Dependent Claim
135 words
In a method for wrenching one of a plurality of adjacent threaded connectors, the combination of steps comprising: placing a wrench over a first threaded connector to be rotated; placing an anchor and reaction plate over a second threaded connector adjacent said first threaded connector; and, exerting a powered force between said wrench and said anchor and reaction plate by mounting a hydraulic cylinder assembly between said anchor and reaction plate and said wrench and applying a pressurized fluid to said cylinder assembly to cause extension thereof; retracting said hydraulic cylinder assembly; adjusting the effective distance between said operable connection of said cylinder assembly to said anchor and reaction plate and said point of contact of said cylinder assembly on said wrench; and, reapplying said pressurized fluid to said cylinder assembly to cause extension thereof.
Claim 6
Dependent Claim
135 words
In a method for wrenching one of a plurality of adjacent threaded connectors, the combination of steps comprising: placing a wrench over a first threaded connector to be rotated; placing an anchor and reaction plate over a second threaded connector adjacent said first threaded connector; and, exerting a powered force between said wrench and said anchor and reaction plate by mounting a hydraulic cylinder assembly between said anchor and reaction plate and said wrench and applying a pressurized fluid to said cylinder assembly to cause extension thereof; retracting said hydraulic cylinder assembly; adjusting the effective distance between said operable connection of said cylinder assembly to said anchor and reaction plate and said point of contact of said cylinder assembly on said wrench; and, reapplying said pressurized fluid to said cylinder assembly to cause extension thereof.
Claim 7
Dependent Claim
70 words
The invention as claimed in claim 3 including: applying a first fluid of a first pressure magnitude to the end of said cylinder assembly operatively engaging said wrench; and selectively and simultaneously applying a higher pressured second fluid to the other end of said cylinder assembly; whereby said cylinder assembly is continually urged toward the retracted position in the absence of selective application of said higher pressured second fluid thereto.
Claim 8
Dependent Claim
31 words
The invention as claimed in claim 1 including: means for reading out the pressure of said first pressured fluid as an indication of the force applied to said connector being rotated.
Claim 9
Dependent Claim
22 words
The invention as claimed in claim 1 wherein: said first fluid is a gas; and, said second fluid is a hydraulic fluid.
Claim 10
Dependent Claim
42 words
The invention as claimed in claim 1 including: means for adjusting the effective distance between said operable connection of said cylinder and piston assembly to said first member and said point of contact of said cylinder and piston assembly on said wrench.
Claim 11
Dependent Claim
33 words
The invention as claimed in claim 2 wherein: said adjusting means includes a ratchet and pawl assembly operably connected between said first member and said one end of said cylinder and piston assembly.
Claim 12
Dependent Claim
51 words
The invention as claimed in claim 8 wherein said ratchet and pawl assembly includes: a ratchet member pivotally connected to said first member and to said one end of said cylinder and piston assembly; and, a pawl member pivotally connected to said first member and arranged to contact said ratchet member.
Claim 13
Dependent Claim
25 words
The invention as claimed in claim 9 including: means for maintaining said other end of said cylinder and piston assembly in contact with said wrench.
Claim 14
Dependent Claim
39 words
The invention as claimed in claim 2 wherein said adjusting means includes: a plurality of notches formed on the second end of said wrench, said notches being arranged to receive said other end of said cylinder and piston assembly.
Claim 15
Dependent Claim
21 words
The invention as claimed in claim 11 wherein: said notches are each equally spaced from said one end of said wrench.
Claim 16
Dependent Claim
27 words
The invention as claimed in claim 3 including: monitoring the pressure of said pressurized fluid as an indication of the torque applied to said first threaded connector.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |