US3785409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamping apparatus for resistance welding of multiple wires forming a well screen
Assignee: Howard Smith Co
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Filing: 1972-10-31
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Granted: 1974-01-15
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Expires: 1992-10-31
Abstract
Abstract Clamping apparatus for confining and maintaining electrical contact with multiple longitudinally extending rib wires during the resistance welding thereof to wire wrapped thereon for forming a well screen or the like, wherein the clamping apparatus compensates for wear thereon. The apparatus may be automatically adjustable for wear and also variable in diameter to permit forming the welded screen on upset tubing and on other pipe having variations in the outside diameter thereof while still effecting the electrical contact required for reliable and sound resistance welding of the multiple rib wires to the wrapping wire.
Inventors
- 👤 H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:14
CPC Classifications
B; B21; B21F; B21F27/00; B21F27/12; B21F27/121; B21F27/122; B21F27/124; B23; B23K; B23K11/00; B23K11/002; B23K11/008; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49602
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
118 words
Apparatus for clamping and guiding longitudinally disposed rib wires for the resistance welding thereof to wire wrapped thereon, comprising: a plurality of arcuate clamping and guide shoes disposed in a generally ring-shape, with each of said shoes having end surfaces spaced from the end surfaces of the adjacent shoes to enable said shoes to move radially; each of said shoes having a plurality of grooves in its inner surface, with each of said grooves having at least one surface adapted to engage one of the rib wires; and means for urging said guide shoes radially inwardly to maintain the contact between each of said surfaces of said grooves and the rib wires as wear occurs on said surfaces.
Claim 2
Dependent Claim
118 words
Apparatus for clamping and guiding longitudinally disposed rib wires for the resistance welding thereof to wire wrapped thereon, comprising: a plurality of arcuate clamping and guide shoes disposed in a generally ring-shape, with each of said shoes having end surfaces spaced from the end surfaces of the adjacent shoes to enable said shoes to move radially; each of said shoes having a plurality of grooves in its inner surface, with each of said grooves having at least one surface adapted to engage one of the rib wires; and means for urging said guide shoes radially inwardly to maintain the contact between each of said surfaces of said grooves and the rib wires as wear occurs on said surfaces.
Claim 3
Dependent Claim
56 words
The structure set forth in claim 1, wherein said urging means includes: support means positioned outwarDly of said guide sleeves: a plurality of substantially radially disposed pins mounted in said support means for substantially radial movement relative thereto; and a pin-positioning ring disposed outwardly of said support means for predetermining the outward extent of said pins.
Claim 4
Dependent Claim
35 words
The structure set forth in claim 2, including: means connecting said pin-positioning ring to said support ring; and coacting surfaces on said pin-positioning ring and said pins for adjusting the outward extent of said pins.
Claim 5
Dependent Claim
37 words
The structure set forth in claim 1, wherein said urging means includes: resilient means acting on each of said guide shoes for urging same radially inwardly to automatically compensate for wear on said surfaces of said grooves.
Claim 6
Dependent Claim
72 words
The structure set forth in claim 4, wherein said resilient means for each of said guide shoes includes: at least one plunger slidably disposed in said support means for substantially radial movement and having an inner surface engageable with one of the guide shoes; and a spring acting on said plunger and urging same radially inwardly to maintain the contact between said inner surface thereof and said one of the guide shoes.
Claim 7
Dependent Claim
76 words
The structure set forth in claim 1, wherein said urging means includes: support means positioned outwardly of said guide shoes; a plurality of substantially radially disposed pins mounted in said support means for substantially radial movement relative thereto; a pin-positioning ring disposed outwardly of said support means for predetermining the outward extent of said pins; and resilient means for each of said pins urging same outwardly to maintain the pins in contact with said pin-positioning ring.
Claim 8
Dependent Claim
29 words
The structure set forth in claim 6, wherein: said resilient means for each of said pins also acts on one of said guide shoes for urging same radially inwardly.
Claim 9
Dependent Claim
76 words
The structure set forth in claim 7, wherein said rib wires are supported on a pipe, and: said guide shoes have outer surfaces spaced inwardly from said support means for permitting limited outward movements of said shoes relative to said support means and acting to compress said resilient means whereby inward and outward substantially radial movements of said guide shoes automatically occurs in response to variations in the diameter of the pipe supporting said rib wires.
Claim 10
Dependent Claim
58 words
The structure set forth in claim 2, wherein: said pin-positioning ring has an inner inclined cam surface; and each of said pins has an outer inclined cam surface coacting with said cam surface of said pin-positioning ring for adjusting the outward limits of movement of said pins by a rotation of said pin-positioning ring relative to said pins.
Claim 11
Dependent Claim
54 words
The structure set forth in claim 1, wherein: said one surface of each of said grooves is inclined and intersects another inclined surface to form a pair of surfaces engageable with each of said rib wires for assuring contact therewith as said guide shoes are adjusted inwardly to compensate for wear on said surfaces.
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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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |