US3940840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for extraction of a preformed fitting from a peripheral groove
Assignee: Government of France
•
Filing: 1974-09-09
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Granted: 1976-03-02
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Expires: 1994-09-09
Abstract
Abstract A tool is provided for the extraction of preformed fittings placed in a peripheral groove hollowed into the wall of a bore. A pincer device is formed by two tapered noses, one fixedly attached to a hollow body and the second attached to a piston capable of sliding within the hollow body. An adjustable stop controls the width of the pincer device, and a reference marking indicates the setting of the stop. A grip sleeve and positioning holder assist a user in operating the tool.
Inventors
- 👤 Eugene Sauveur Bellia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 22:07
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/0028; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53657; Y10T29/53909
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
150 words
A tool for extracting a preformed fitting from a peripheral groove hollowed in the wall of a bore comprising: a cylindrical, hollow body having an external diameter less than the diameter of said bore, at least one longitudinal slit opening at one of the ends of said hollow body and at least one nose, disposed at the bottom of said slit and projecting to the outside of said hollow body; a piston capable of sliding inside said hollow body, having at least one nose at one of the ends of said piston, positioned so as to engage in said at least one slit of said hollow body, and projecting to the outside thereof; said tool including means for positioning said one end of said hollow body within a bore to position the nose of said hollow body and the nose of said piston at a pre-determined position within said bore.
Claim 2
Dependent Claim
150 words
A tool for extracting a preformed fitting from a peripheral groove hollowed in the wall of a bore comprising: a cylindrical, hollow body having an external diameter less than the diameter of said bore, at least one longitudinal slit opening at one of the ends of said hollow body and at least one nose, disposed at the bottom of said slit and projecting to the outside of said hollow body; a piston capable of sliding inside said hollow body, having at least one nose at one of the ends of said piston, positioned so as to engage in said at least one slit of said hollow body, and projecting to the outside thereof; said tool including means for positioning said one end of said hollow body within a bore to position the nose of said hollow body and the nose of said piston at a pre-determined position within said bore.
Claim 3
Dependent Claim
39 words
A tool as claimed in claim 1 further comprising a peripheral sleeve surrounding said hollow body and disposed at the end thereof remote from said one end that remains outside said bore, so as to serve as a grip.
Claim 4
Dependent Claim
34 words
A tool as claimed in claim 1 further comprising a positioning holder, in which said hollow body slides, having at one end a bearing plate to be applied about the opening of said bore.
Claim 5
Dependent Claim
49 words
A tool as claimed in claim 3 wherein said hollow body has a peripheral sleeve which serves as a grip disposed at the end thereof that remains outside said bore, said sleeve having a peripheral shoulder that bears on the end of said positioning holder opposite said bearing plate.
Claim 6
Dependent Claim
38 words
A tool as claimed in claim 4 wherein said sleeve extends beyond the rear end of said hollow body and presents a central bore, said bore being obturated by a threaded plug through which said piston freely passes.
Claim 7
Dependent Claim
64 words
A tool as claimed in claim 5 further comprising a spring disposed about said piston inside said central bore of said sleeve, said spring bearing on a peripheral shoulder of said piston at one end, and bearing on said threaded plug at the other end so as to maintain the separation between said nose of said hollow body and said nose of said piston.
Claim 8
Dependent Claim
37 words
A tool as claimed in claim 5 wherein said piston is extended by a threaded rod, and further comprises a nut screwed on said threaded rod, and an adjustable stop against which said nut bears when unscrewed.
Claim 9
Dependent Claim
85 words
A tool as claimed in claim 7 wherein said adjustable stop comprises a first ring constituting a head to said piston, said first ring presenting a series of notches of different depths, and a second ring, which slides about said piston, having at least one spur, in relief, on the face of said second ring turned toward said first ring, so that said at least one spur engages in one of the said notches, depending on the relative positions of said first and second rings.
Claim 10
Dependent Claim
46 words
A tool as claimed in claim 8 wherein said second ring is held against said first ring by a peripheral cup, said cup cooperating with a spring that bears on said first ring, at one end, and the bottom of said cup at the other end.
Claim 11
Dependent Claim
53 words
A tool as claimed in claim 9 wherein said cup has a window through which appears a reference marked on said first ring opposite each of said notches, so that said reference corresponds to the position of said adjustable stop, thus indicating the width of a groove containing a fitting to be extracted.
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) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |