Patent US3851373A successfully refreshed from Google Patents.
US3851373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for attachment of a nut in the inside wall of a pipe
Assignee: Individual
•
Filing: 1973-09-06
•
Granted: 1974-12-03
•
Expires: 1993-09-06
Abstract
Abstract Method and apparatus for attaching a nut in the inside wall of a pipe by enabling the nut to punch its own installation aperture therein and swaging the metal of the pipe around the aperture into the grooves of the nut, thereby ensuring the anchorage of the nut in the wall of the pipe. The nut is held inside the pipe and is driven against the wall of the pipe under outward pressure effected inside the pipe, thereby enabling the nut to pierce the wall of the pipe against a die engageable with that portion of the outside wall of the pipe at which the nut is to be attached. The die has swaging blades in the tip thereof so as to swage the metal around the punched aperture into the grooves of the nut for anchorage thereof.
Inventors
- 👤 K Shinjo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:42
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/04; F16B37/06; F16B37/062; F16B37/065; B; B23; B23P; B23P19/00; B23P19/04; B23P19/06; B23P19/062; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/965; Y10S411/968; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833; Y10T29/49835; Y10T29/49837; Y10T29/53; Y10T29/5343; Y10T29/53709; Y10T29/5377; Y10T29/53774; Y10T29/53778
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
181 words
Apparatus for attaching a nut to a wall of a pipe; said apparatus comprising: a die having swaging blade means, die moving means for moving said die to and from a die operating position immediately adjacent and in facing relationship to an outside surface portion of a wall of a pipe, nut holder means for holding a nut, nut holder moving means for moving said nut holder means to and from a nut holder operating position inside of said pipe in facing relationship to an inside surface portion of said wall of said pipe which is directly opposite said die operating position, and pressing means for pressing said nut holder means in an outward direction transverse to the surface of said wall with sufficient pressure that a nut in said nut holder means punches its own installation aperture in the wall with said die providing a backing force for said nut and with said swaging blade means effecting a swaging of material of said wall around said aperture into grooves provided on said nut for anchoring said nut in said wall.
Claim 2
Dependent Claim
181 words
Apparatus for attaching a nut to a wall of a pipe; said apparatus comprising: a die having swaging blade means, die moving means for moving said die to and from a die operating position immediately adjacent and in facing relationship to an outside surface portion of a wall of a pipe, nut holder means for holding a nut, nut holder moving means for moving said nut holder means to and from a nut holder operating position inside of said pipe in facing relationship to an inside surface portion of said wall of said pipe which is directly opposite said die operating position, and pressing means for pressing said nut holder means in an outward direction transverse to the surface of said wall with sufficient pressure that a nut in said nut holder means punches its own installation aperture in the wall with said die providing a backing force for said nut and with said swaging blade means effecting a swaging of material of said wall around said aperture into grooves provided on said nut for anchoring said nut in said wall.
Claim 3
Dependent Claim
53 words
Apparatus according to claim 1, wherein said die has a bore in the center thereof, wherein said swaging blade means extend around said bore, and wherein said bore is dimensioned so as to accept the punched waste material from said wall which is punched by said nut during formation of said installation aperture.
Claim 4
Dependent Claim
30 words
Apparatus according to claim 1, wherein said nut holder moving means includes an inserter which is movable into and out of said pipe through an open end of said pipe.
Claim 5
Dependent Claim
86 words
Apparatus according to claim 3, wherein said pressing means includes: a wedge member extending in the longitudinal direction of said pipe when said inserter is positioned inside of said pipe, said wedge member having an inclined lateral surface portion in sliding engagement with a nut holder block forming said nut holder means, and wedge member moving means for forcibly moving said wedge member in said longitudinal direction with a resultant movement of said nut holder block in a direction at right angles to said longitudinal direction.
Claim 6
Dependent Claim
33 words
Apparatus according to claim 4, wherein said pressing means further includes return spring means for returning said wedge member in a direction opposite the direction of movement of said wedge member moving means.
Claim 7
Dependent Claim
17 words
Apparatus according to claim 4, wherein said wedge member moving means includes pressurized fluid operated piston-cylinder means.
Claim 8
Dependent Claim
19 words
Apparatus according to claim 6, wherein said pressurized fluid operated piston-cylinder means is a compressed air driven piston-cylinder arrangement.
Claim 9
Dependent Claim
60 words
Apparatus according to claim 3, wherein said inserter includes a reduced size portion at the side thereof which accommodates said nut holder, said reduced size portion extending from said nut holder to the end of said inserter opposite said open end of sAid pipe for accommodating withdrawal of said inserter without engagement with a nut anchored in said pipe wall.
Claim 10
Dependent Claim
15 words
Apparatus according to claim 1, wherein said die moving means includes hydraulically operated piston-cylinder means.
Claim 11
Dependent Claim
15 words
Apparatus according to claim 7, wherein said die moving means includes hydraulically operated piston-cylinder means.
Claim 12
Dependent Claim
93 words
Apparatus according to claim 1, comprising a further die with swaging blade means and further die moving means for moving said further die to and from a further die operating position immediately adjacent and in facing relationship to an outside surface portion of said wall which is spaced axially from said first-mentioned die, wherein said nut holder moving means includes a further nut holder means for accommodating a further nut and for moving said further nut to and from a position inside said pipe in facing relationship to said further die operating position.
Claim 13
Dependent Claim
114 words
Apparatus according to claim 11, wherein said nut holder moving means includes an inserter which is movable into and out of said pipe through an open end of said pipe, and wherein said pressing means includes: a wedge member extending in the longitudinal direction of said pipe when said inserter is positioned inside of said pipe, said wedge member having respective inclined lateral surface portions in sliding engagement with respective nut holder blocks of said nut holder means, and wedge member moving means for forcibly moving said wedge member in said longitudinal direction with a resultant simultaneous movement of both of said nut holder blocks in directions at right angles to said longitudinal direction.
Claim 14
Dependent Claim
21 words
Apparatus according to claim 12, wherein the respective nut holder blocks are on the same lateral side of said wedge member.
Claim 15
Dependent Claim
25 words
Apparatus according to claim 12, wherein the respective nut holder blocks are on opposite sides of said wedge member and in alignment with one another.
Claim 16
Dependent Claim
32 words
Apparatus according to claim 1, further comprising pipe back-up means positionable at the opposite side of said pipe as the die operating position for applying back-up forces for the nut anchoring operation.
Claim 17
Dependent Claim
14 words
Apparatus according to claim 15, wherein said back-up means is a fixed worktable surface.
Claim 18
Dependent Claim
19 words
Apparatus according to claim 15, wherein said back-up means is another die in facing relationship to said first-mentioned die.
Claim 19
Dependent Claim
83 words
Apparatus according to claim 11, wherein said nut holder moving means includes an inserter which is movable into and out of said pipe through an open end of said pipe, and wherein said pressing means includes a separate fluid pressure operated piston-cylinder arrangement for each of said nut holder means, said piston-cylinder arrangements being supported by said inserter and being operative to force said nut holder means in a direction at right angles to the longitudinal axis of said inserter and said pipe.
Claim 20
Dependent Claim
33 words
Apparatus according to claim 1, wherein said pressing means includes fluid operated piston-cylinder means for pressing said nut holder means in a direction at right angles to the longitudinal axis of said pipe.
Claim 21
Dependent Claim
32 words
Apparatus according to claim 14, further comprising pipe back-up means positionable at the opposite side of said pipe as the die operating position for applying back-up forces for the nut anchoring operation.
Claim 22
Dependent Claim
19 words
Apparatus according to claim 20, wherein said back-up means is another die in facing relationship to said first-mentioned die.
Claim 23
Dependent Claim
26 words
Apparatus according to claim 21, wherein said inclined lateral surface portions of the wedge member include dove-tail slots for guiding movement of said nut holder blocks.
Claim 24
Independent Claim
122 words
A method of attaching a nut to a wall of a pipe; said method comprising: positioning a die with swaging blade means in facing relationship to an outside surface portion of a wall of a pipe, moving a nut inside of said pipe to a position in facing relationship to said die, and pressing said nut in an outward direction transverse to the surface of said walL with sufficient pressure so that said nut punches its own installation aperture in said wall with said die providing a backing force for said nut and with said swaging blade means effecting a swaging of material of said wall around said aperture into grooves provided on said nut for anchoring said nut in said wall.
Claim 25
Independent Claim
122 words
A method of attaching a nut to a wall of a pipe; said method comprising: positioning a die with swaging blade means in facing relationship to an outside surface portion of a wall of a pipe, moving a nut inside of said pipe to a position in facing relationship to said die, and pressing said nut in an outward direction transverse to the surface of said walL with sufficient pressure so that said nut punches its own installation aperture in said wall with said die providing a backing force for said nut and with said swaging blade means effecting a swaging of material of said wall around said aperture into grooves provided on said nut for anchoring said nut in said wall.
Claim 26
Dependent Claim
46 words
A method according to claim 23, further comprising placing said pipe on a worktable prior to said positioning of said die and positioning said die on the opposite side of said pipe as said worktable so as to clamp said pipe between said die and worktable.
Claim 27
Dependent Claim
31 words
A method according to claim 23, wherein said step of moving said nut includes placing said nut on an inserter and inserting said inserter through an open end of said pipe.
Claim 28
Dependent Claim
34 words
A method according to claim 23, including simultaneously positioning a second die and moving a second nut so that said pressing effects a simultaneous anchoring of two nuts into the wall of said pipe.
Claim 29
Dependent Claim
18 words
A method according to claim 25, further including removing said inserter from said pipe after said pressing step.
Claim 30
Dependent Claim
29 words
A method according to claim 25, wherein said step of pressing includes supplying compressed air to a piston-cylinder arrangement attached to a wedge member extending longitudinally in said inserter.
Claim 31
Dependent Claim
40 words
A method according to claim 25, wherein said step of pressing includes supplying hydraulic fluid to at least one piston-cylinder arrangement extending transversely of said inserter and parallel to the direction of travel of said nut during said pressing step.
Claim 32
Dependent Claim
55 words
A method according to claim 24, wherein said step of moving said nut includes placing said nut on an inserter and inserting said inserter through an open end of said pipe and wherein said step of pressing includes supplying compressed air to a piston-cylinder arrangement attached to a wedge member extending longitudinally in said inserter.
Claim 33
Dependent Claim
26 words
A method according to claim 30, wherein said step of positioning a die includes supplying hydraulic pressure fluid to a piston-cylinder arrangement connected to said die.
References Cited (Backward Citations)
US521825A
Cited
DE395771C
Cited
US1748045A
Cited
US2426106A
Cited
US2652942A
Cited
US2646567A
Cited
US2749606A
Cited
US2707322A
Cited
US3028037A
Cited
US3185268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |