US3574915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener-placing apparatus
Assignee: Aerpat AG
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Filing: 1968-11-14
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Granted: 1971-04-13
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Expires: 1988-11-14
Abstract
Abstract The invention provides an adapter for facilitating placing fasteners of the type comprising a threaded first part which is pulled into a second part to place the fastener. The adapter converts a standard rotary tool to provide separately both rotary and axial movement of a threaded mandrel engageable with the threaded first part of a fastener to be placed. The adapter comprises a body; a reciprocable and rotatable mandrel, one end of which is threaded to engage a fastener and the other end of which forms one part of a lead-screw device, the other part of the lead-screw device being driven to rotate by the rotary tool; and an abutment nose rotatable and reciprocable on the body and keyed for sliding on the mandrel. The abutment nose and the body form two parts of a dog clutch. The mandrel is normally rotated by the lead-screw device, but when a fastener is drawn up onto the mandrel and displaces the abutment nose, the dog clutch engages to prevent rotation of the mandrel, which is then retracted axially into the body, by the action of the lead-screw device, to place the fastener.
Inventors
- 👤 Harvey Philip Jeal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:21
CPC Classifications
B; B25; B25B; B25B31/00; B25B27/00; B25B27/0007; B25B27/0014; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/4979; Y10T29/53; Y10T29/53687; Y10T29/53709; Y10T29/53717; Y10T29/53726; Y10T29/53796; Y10T29/5383; Y10T29/53848; Y10T29/53996
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
314 words
Apparatus for placing fasteners of the type comprising an internally threaded first part which is pulled into a second part to place the fastener in a workpiece comprising: a body member; a drawbolt having an externally threaded outer end to engage with the threaded first part of a fastener to be placed, said drawbolt being mounted in aid body so as to be rotatable and reciprocable with respect thereto; a nose assembly carried by said body for abutting the second part of the fastener, said nose assembly being longitudinally displaceable toward said body member by the second part of the fastener when the second part of the fastener is drawn towards the body by rotation of the drawbolt when engaged with the first part of the fastener; a lead-screw device and nut within said body, said device being at least connected to said drawbolt; means establishing a nonrotatable connection between said drawbolt and said nose assembly, said nose assembly when in its position displaced toward said body member being restrained from rotation with respect to said body member to thereby prevent rotation of said drawbolt but permitting axial movement of said drawbolt in response to rotation of said lead screw; a dog clutch directly connecting said nose assembly and said body member, said dog clutch comprising interengaging teeth on said body member and nose assembly, said dog clutch preventing rotation of said nose assembly with respect to said body member when said nose assembly is in its position displaced towards said body member; a detent groove on said nose assembly; a spring detent pin on said body member engageable in said groove to retain said nose assembly displaced toward said body member when said dog clutch is engaged; and means to overcome the retaining action of said spring detent and disengage said dog clutch only upon return of said drawbolt to its forwardmost position.
Claim 2
Dependent Claim
314 words
Apparatus for placing fasteners of the type comprising an internally threaded first part which is pulled into a second part to place the fastener in a workpiece comprising: a body member; a drawbolt having an externally threaded outer end to engage with the threaded first part of a fastener to be placed, said drawbolt being mounted in aid body so as to be rotatable and reciprocable with respect thereto; a nose assembly carried by said body for abutting the second part of the fastener, said nose assembly being longitudinally displaceable toward said body member by the second part of the fastener when the second part of the fastener is drawn towards the body by rotation of the drawbolt when engaged with the first part of the fastener; a lead-screw device and nut within said body, said device being at least connected to said drawbolt; means establishing a nonrotatable connection between said drawbolt and said nose assembly, said nose assembly when in its position displaced toward said body member being restrained from rotation with respect to said body member to thereby prevent rotation of said drawbolt but permitting axial movement of said drawbolt in response to rotation of said lead screw; a dog clutch directly connecting said nose assembly and said body member, said dog clutch comprising interengaging teeth on said body member and nose assembly, said dog clutch preventing rotation of said nose assembly with respect to said body member when said nose assembly is in its position displaced towards said body member; a detent groove on said nose assembly; a spring detent pin on said body member engageable in said groove to retain said nose assembly displaced toward said body member when said dog clutch is engaged; and means to overcome the retaining action of said spring detent and disengage said dog clutch only upon return of said drawbolt to its forwardmost position.
Claim 3
Dependent Claim
175 words
Apparatus as claimed in claim 1, in which: both said sets of interengaging teeth of the dog clutch have sloping faces, and the detent groove has a sloping wall, whereby when the teeth of the dog clutch are engaged and sufficient torque is applied to the nose assembly with respect to the body member, the teeth on the nose assembly climb up the teeth on the body member thus moving the nose assembly away from said body member and causing said detent pin to ride up the wall of said detent groove to throw said dog clutch out of engagement; and in which said drawbolt has a head which, when the drawbolt is in its forwardmost position, contacts the rear end of said nut of said lead-screw device so that said nut drives said drawbolt to rotate with it in the direction of unscrewing the threaded outer end from the fastener, thereby applying torque to said drawbolt to throw said dog clutch out of engagement only when said drawbolt has returned to its forwardmost position.
Claim 4
Dependent Claim
33 words
Apparatus as claimed in claim 1, including a second detent groove on said nose assembly which said detent pin engages to retain said nose assembly in its position away from said body member.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |