US3860468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Angular welding process and apparatus
Assignee: EIDP Inc
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Filing: 1973-04-10
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Granted: 1975-01-14
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Expires: 1993-04-10
Abstract
Abstract Method of friction welding two thermoplastic parts together in predetermined alignment with each other which comprises cyclicly moving the parts relative to one another thereby setting up a relative vibration between the two parts, whereby opposing forces are substantially equal while pressing the two parts into surface contact with each other for a time sufficient to melt the contacting surfaces by frictionally induced heat, stopping the relative vibration with the parts in predetermined alignment, and holding the parts in predetermined alignment with said surfaces pressed into contact with each other until the melted thermoplastic resin hardens.
Inventors
- 👤 Richard A Scherer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:07
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/50; B29C66/51; B29C66/54; B29C65/00; B29C65/02; B29C65/06; B29C65/0609; B29C65/0618; B29C65/0627; B29C66/01; B29C66/05; B29C66/10; B29C66/13; B29C66/131; B29C66/1312; B29C66/542; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C66/90; B29C66/95; B29C66/951; B29C66/9513
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
104 words
A method of friction welding two thermoplastic resin parts together in predetermined alignment with each other which comprises oscillating the two parts relative to one another through a displacement of small amplitude, thereby setting up a relative vibration between the two parts whereby opposing forces are substantially equal while pressing the two parts into surface contact with each other for a time sufficient to melt the contacting surfaces by frictionally induced heat, stopping the relative vibration with the parts in predetermined alignment, and holding the parts in predetermined alignment with said surfaces pressed into contact with each other until the melted thermoplastic resin hardens.
Claim 2
Independent Claim
104 words
A method of friction welding two thermoplastic resin parts together in predetermined alignment with each other which comprises oscillating the two parts relative to one another through a displacement of small amplitude, thereby setting up a relative vibration between the two parts whereby opposing forces are substantially equal while pressing the two parts into surface contact with each other for a time sufficient to melt the contacting surfaces by frictionally induced heat, stopping the relative vibration with the parts in predetermined alignment, and holding the parts in predetermined alignment with said surfaces pressed into contact with each other until the melted thermoplastic resin hardens.
Claim 3
Dependent Claim
13 words
The method of claim 1 in which the vibration is an angular displacement.
Claim 4
Dependent Claim
13 words
The method of claim 1 in which the vibration is a linear displacement.
Claim 5
Independent Claim
139 words
A method of friction welding two thermoplastic resin parts together in predetermined alignment with each other which comprises oscillating the two parts relative to one another through a displacement of small amplitude, thereby setting up a relative vibration between the two parts whereby opposing forces are substantially equal while pressing the two parts into surface contact with each other for a time sufficient to melt the contacting surfaces by frictionally induced heat, the vibration having a frequency of about 100 cycles/second and the vibrations being such as to produce a relative movement between the contacting surfaces of between 2 and 8 millimeters during each half cycle of vibration, stopping the relative vibration with parts in predetermined alignment, and holding the parts in predetermined alignment with said surfaces pressed into contact with each other until the melted thermoplastic resin hardens.
Claim 6
Independent Claim
139 words
A method of friction welding two thermoplastic resin parts together in predetermined alignment with each other which comprises oscillating the two parts relative to one another through a displacement of small amplitude, thereby setting up a relative vibration between the two parts whereby opposing forces are substantially equal while pressing the two parts into surface contact with each other for a time sufficient to melt the contacting surfaces by frictionally induced heat, the vibration having a frequency of about 100 cycles/second and the vibrations being such as to produce a relative movement between the contacting surfaces of between 2 and 8 millimeters during each half cycle of vibration, stopping the relative vibration with parts in predetermined alignment, and holding the parts in predetermined alignment with said surfaces pressed into contact with each other until the melted thermoplastic resin hardens.
Claim 7
Dependent Claim
80 words
Apparatus for friction welding thermoplastic resin parts, which comprises a pair of jaws for holding the parts to be welded, means for urging the jaws toward one another to press the parts into surface contact with one another, means for vibrating both jaws holding said parts relative to one another through a displacement of small amplitude and in a plane parallel to the surfaces of said parts, and means for stopping the relative vibration with the parts in predetermined alignment.
Claim 8
Dependent Claim
80 words
Apparatus for friction welding thermoplastic resin parts, which comprises a pair of jaws for holding the parts to be welded, means for urging the jaws toward one another to press the parts into surface contact with one another, means for vibrating both jaws holding said parts relative to one another through a displacement of small amplitude and in a plane parallel to the surfaces of said parts, and means for stopping the relative vibration with the parts in predetermined alignment.
Claim 9
Dependent Claim
20 words
The apparatus of claim 5 in which the two jaws are co-axially mounted for angular oscillation about a common axis.
Claim 10
Dependent Claim
39 words
The apparatus of claim 6 in which the two jaws are each provided with a radially extending arm, the two arms being caused to oscillate by two cams disposed out-of-phase on a common shaft parallel to said common axis.
Claim 11
Dependent Claim
44 words
The apparatus of claim 7 wherein said arm has associated therewith a second cam of larger throw than the first cams which produce the oscillation so that the arms can be pivoted to a position in which the first cams do not act thereon.
Claim 12
Dependent Claim
140 words
Apparatus for friction welding thermoplastic resin parts, which comprises a pair of jaws for holding the parts to be welded, means for urging the jaws toward one another to press the parts into surface contact with one another, the two jaws being co-axially mounted for angular oscillation about a common axis and each jaw provided with a radially extending arm, the arms being articulated to rocker arms pivotable about a further axis parallel to said common axis, said rocker arms being caused to oscillate by two cams disposed out-of-phase on a common shaft parallel to said common axis, means for vibrating both jaws holding said parts relative to one another through a displacement of small amplitude and in a plane parallel to the surfaces of said parts, and means for stopping the relative vibration with the parts in predetermined alignment.
Claim 13
Dependent Claim
140 words
Apparatus for friction welding thermoplastic resin parts, which comprises a pair of jaws for holding the parts to be welded, means for urging the jaws toward one another to press the parts into surface contact with one another, the two jaws being co-axially mounted for angular oscillation about a common axis and each jaw provided with a radially extending arm, the arms being articulated to rocker arms pivotable about a further axis parallel to said common axis, said rocker arms being caused to oscillate by two cams disposed out-of-phase on a common shaft parallel to said common axis, means for vibrating both jaws holding said parts relative to one another through a displacement of small amplitude and in a plane parallel to the surfaces of said parts, and means for stopping the relative vibration with the parts in predetermined alignment.
Claim 14
Dependent Claim
86 words
The apparatus of claim 9 in which each cam has associated therewith a lever having a slidable, pivotal connection with the rocker arm, the levers being caused by the cams to reciprocate generally longitudinally of themselves and Traverse to the rocker arms in a working position, the levers, together with the cam shaft, being rotatable to a position wherein they are aligned with the rocker arms, so that reciprocation of the lever causes no oscillation of the rocker arm and thus no movement of the jaws.
Claim 15
Dependent Claim
23 words
The apparatus of claim 5 in which the two jaws are moved reciprocally in a plane parallel to the surfaces of said parts.
Claim 16
Dependent Claim
60 words
The apparatus of claim 11 in which the two jaws are each provided with an extended arm, the arms being articulated to rocker arms pivotable about an axis, said rocker arms being caused to oscillate by two cams disposed out-of-phase on a common shaft parallel to said axis, said jaw and extended arm being positioned transverse to the rocker arm.
Claim 17
Dependent Claim
213 words
Apparatus for friction welding thermoplastic resin parts, which comprises a pair of jaws for holding the parts to be welded, means for urging the jaws toward one another to press the parts into surface contact with one another, the two jaws each being provided with an extended arm, the arms being articulated to rocker arms pivotable about an axis, said rocker arms being caused to oscillate by two cams disposed out-of-phase on a common shaft parallel to said axis, said jaw and extended arm being positioned transverse to the rocker arm, each cam having associated therewith a lever having a slidable, pivotal connection with the rocker arm, the levers being caused by the cams to reciprocate generally longitudinally of themselves and traverse to the rocker arms in a working position, the levers, together with the cam shaft, being rotatable to a position wherein they are aligned with the rocker arms, so that reciprocation of the lever causes no oscillation of the rocker arm and thus no movement of the jaws, means for vibrating both jaws holding said parts relative to one another through a displacement of small amplitude and reciprocally in a plane parallel to the surfaces of said parts, and means for stopping the relative vibration with the parts in predetermined alignment.
Claim 18
Dependent Claim
213 words
Apparatus for friction welding thermoplastic resin parts, which comprises a pair of jaws for holding the parts to be welded, means for urging the jaws toward one another to press the parts into surface contact with one another, the two jaws each being provided with an extended arm, the arms being articulated to rocker arms pivotable about an axis, said rocker arms being caused to oscillate by two cams disposed out-of-phase on a common shaft parallel to said axis, said jaw and extended arm being positioned transverse to the rocker arm, each cam having associated therewith a lever having a slidable, pivotal connection with the rocker arm, the levers being caused by the cams to reciprocate generally longitudinally of themselves and traverse to the rocker arms in a working position, the levers, together with the cam shaft, being rotatable to a position wherein they are aligned with the rocker arms, so that reciprocation of the lever causes no oscillation of the rocker arm and thus no movement of the jaws, means for vibrating both jaws holding said parts relative to one another through a displacement of small amplitude and reciprocally in a plane parallel to the surfaces of said parts, and means for stopping the relative vibration with the parts in predetermined alignment.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |