US3917497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming two interfitting preformed parts by heat fusion of said parts
Assignee: Individual
•
Filing: 1973-07-20
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Granted: 1975-11-04
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Expires: 1993-07-20
Abstract
Abstract A configured thermoplastic product is formed of two interfitting preformed parts which are bonded into an integral unit by heat fusion of the interfitting surface portions of the parts. The apparatus for forming the product includes means to grip one part to restrain rotation thereof and means for gripping and rotating the other part at high speed while the parts are relatively advanced axially as determined by guide means. The method utilizes the apparatus to telescopically interengage parts having an interference fit so as to generate by friction between the parts as the parts advance toward selected interfitting relation heat at the interfitting surface portions of the parts sufficient to soften and fuse said parts at said interfitting surface portions.
Inventors
- 👤 Charles F Stickler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:04
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/80; B29C66/84; B29C66/861; B29C65/00; B29C65/02; B29C65/06; B29C65/0672; B29C65/78; B29C65/7841; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5344; B29C66/63; B29C66/82; B29C66/822; B29C66/8221; B29C66/83; B29C66/832; B29C66/8322; F; F16; F16L; F16L47/00; F16L47/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
111 words
THE METHOD OF MAKING A CONFIGURED THERMOPLASTIC PRODUCT FROM TWO PREFORMED THERMOPLASTIC COMPONENTS HAVING RESPECTIVELY AN OUTER SURFACE OF SUBSTANTIALLY UNIFORM CIRCULAR CROSS SECTIONAL SHAPE AND DIAMETER AND A BORE OF SUBSTANTIALLY UNIFORM CIRCULAR CROSS SECTIONAL SHAPE AND OF A DIAMETER TO RECEIVE SAID FIRST NAMED COMPONENT WITH AN INTERFERENCE FIT COMPRISING THE STEPS OF: GRIPPING ONE OF SAID COMPONENTS TO RESTRAIN IT AGAINST ROTATION, ROTATING THE OTHER COMPONENT, ADVANCING ONE OF SAID COMPONENTS TOWARD THE OTHER TO SELECTED COAXIAL TELESCOPIC RELATION THEREWITH WHILE SAID ROTATING COMPONENT ROTATES AT A SPEED SUFFICIENT TO GENERATE FRICTION AND HEAT TO SOFTEN THE FULL EXTENT OF THE INTERFITTING SURFACE PORTIONS OF SAID COMPONINTS, AND
Claim 2
Independent Claim
111 words
THE METHOD OF MAKING A CONFIGURED THERMOPLASTIC PRODUCT FROM TWO PREFORMED THERMOPLASTIC COMPONENTS HAVING RESPECTIVELY AN OUTER SURFACE OF SUBSTANTIALLY UNIFORM CIRCULAR CROSS SECTIONAL SHAPE AND DIAMETER AND A BORE OF SUBSTANTIALLY UNIFORM CIRCULAR CROSS SECTIONAL SHAPE AND OF A DIAMETER TO RECEIVE SAID FIRST NAMED COMPONENT WITH AN INTERFERENCE FIT COMPRISING THE STEPS OF: GRIPPING ONE OF SAID COMPONENTS TO RESTRAIN IT AGAINST ROTATION, ROTATING THE OTHER COMPONENT, ADVANCING ONE OF SAID COMPONENTS TOWARD THE OTHER TO SELECTED COAXIAL TELESCOPIC RELATION THEREWITH WHILE SAID ROTATING COMPONENT ROTATES AT A SPEED SUFFICIENT TO GENERATE FRICTION AND HEAT TO SOFTEN THE FULL EXTENT OF THE INTERFITTING SURFACE PORTIONS OF SAID COMPONINTS, AND
Claim 3
Dependent Claim
22 words
The method defined in claim 1, wherein said rotating component is rotated at a speed of at least 2000 revolutions per minute.
Claim 4
Dependent Claim
35 words
The method defined in claim 1 wherein the interfitting surfaces of said components are cylindrical and the diameter of said bore is slightly less than the outer diameter of the component inserted into said bore.
Claim 5
Dependent Claim
29 words
The method defined in claim 3, wherein the diameter of said bore is at least 0.002 inches less than the outer diameter of the component inserted into said bore.
Claim 6
Dependent Claim
61 words
The method defined in claim 1, wherein the component which is telescopically received in said bore is a tube and receives a cylindrical guide concentric with and projecting axially from said bored component with a clearance fit in advance of the telescopic interfit of said components, rotation of said other component continuing until said advancing component reaches said selected telescopic relation.
Claim 7
Dependent Claim
43 words
The method defined in claim 1, in which the telescoped component is a tube and receives a cylindrical pilot member with a clearance fit preceding telescopic engagement of said components while said components are relatively shifted rotatively and axially to selected telescoping relation.
Claim 8
Dependent Claim
96 words
Apparatus for making a configured thermoplastic product from two preformed interfitting thermoplastic components including an inner component having an outer surface of uniform outside diameter and an outer component having a bore of uniform inside diameter to receive said inner component with an interference fit, comprising means for releasably gripping one of said components to restrain it against rotation, means for releasably gripping and rotating at high speed said other component, and cylindrical means carried by and projecting from one of said gripping means for guiding relative endwise movement of said components coaxially into telescoping relation.
Claim 9
Dependent Claim
96 words
Apparatus for making a configured thermoplastic product from two preformed interfitting thermoplastic components including an inner component having an outer surface of uniform outside diameter and an outer component having a bore of uniform inside diameter to receive said inner component with an interference fit, comprising means for releasably gripping one of said components to restrain it against rotation, means for releasably gripping and rotating at high speed said other component, and cylindrical means carried by and projecting from one of said gripping means for guiding relative endwise movement of said components coaxially into telescoping relation.
Claim 10
Dependent Claim
20 words
Apparatus as defined in claim 7 wherein said guide means is carried by aNd projects from said rotatable gripping means.
Claim 11
Dependent Claim
97 words
Apparatus for bonding to a thermoplastic preformed tube of uniform outer diameter a preformed thermoplastic ring having a bore of a uniform diameter slightly less than the outer diameter of said tube, comprising means for releasably gripping said tube to restrain it from rotation, and means for rotating said ring at high speed, said last named means including a cylindrical pilot member projecting coaxially from said ring and insertible in said tube with slight clearance to guide relative movement of said tube and ring to telescoping relation and to interiorly support said tube during said relative movement.
Claim 12
Dependent Claim
97 words
Apparatus for bonding to a thermoplastic preformed tube of uniform outer diameter a preformed thermoplastic ring having a bore of a uniform diameter slightly less than the outer diameter of said tube, comprising means for releasably gripping said tube to restrain it from rotation, and means for rotating said ring at high speed, said last named means including a cylindrical pilot member projecting coaxially from said ring and insertible in said tube with slight clearance to guide relative movement of said tube and ring to telescoping relation and to interiorly support said tube during said relative movement.
Claim 13
Dependent Claim
81 words
Apparatus as defined in claim 9, wherein said ring rotating means includes a chuck having a circular set of ring-gripping jaws, means for releasably contracting said jaws to ring gripping position, and wherein said pilot member extends centrally between and includes a cylindrical part projecting beyond the ends of said jaws and terminating in a rounded end, said jaws, ring and pilot member defining an annular chamber to receive the end portion of said tube in telescoped relation within said ring.
Claim 14
Dependent Claim
29 words
Apparatus as defined in claim 10 wherein said pilot member includes an enlarged portion positioned within said jaws to define a stop engageable by the end of said tube.
Claim 15
Dependent Claim
33 words
Apparatus as defined in claim 9, wherein said ring includes a tapered end portion and said jaws cooperate to define a recess receiving and of a shape complementary to said tapered ring portion.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |