US4856944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling between a tool head and a tool support
Assignee: GOTTLIEB GUHRING KG GERMANY
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Filing: 1988-03-11
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Granted: 1989-08-15
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Expires: 2008-03-11
Abstract
Abstract A coupling between a tool head and a tool support exhibits, for rough positioning, a holding fixture pin connection. By at least one fastening bolt running in the axial direction of the tool support, the tool head is braced against the tool support. In doing so the fastening bolt engages through a first screw coupling with the tool head and through a second screw coupling with the tool support. The first and second screw couplings exhibit synchronized threads of differing pitch so that, when tightening the fastening bolt, the tool support and the tool head are braced against each other in the axial direction. Further, the fastening bolt exhibits a centering section which, in the assembled state of the coupling, centers the tool head relative to the tool support. The fastening bolt, in the assembled state of the coupling, is received in its entirety in the inside of the unit formed by the tool support and the tool head and is accessible only through a borehole. Advantageously, this borehole also acts as a coolant borehole. The coolant that flows through it during use accordingly rinses away impurities.
Inventors
- 👤 Josef Reinauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:20
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/11; Y; Y10; Y10T; Y10T279/00; Y10T279/16; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455; Y10T408/78; Y10T408/89; Y10T408/909; Y10T408/9095; Y10T408/9097
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
242 words
A tool comprising: (a) a tool head having: (i) a longitudinal axis and (ii) at least one first internal thread having a first pitch and being parallel to said longitudinal axis of said tool head; (b) a tool support having: (i) a longitudinal axis that is coaxial with the longitudinal axis of said tool head and (ii) at least one second internal thread having a pitch different from said first pitch and being parallel to said longitudinal axis of said tool support, said at least one second internal thread being coaxial and synchronized with said at least one first internal thread; and (c) at least one fastening bolt comprising: (i) a first external thread section threadably engaged in said at least one first internal thread and (ii) a second external thread section threadably engaged in said at least one second internal thread, wherein: (d) said tool head has at least one first borehole that is coaxial with said at least one first internal thread and that is open towards said tool support; (e) said tool support has at least one second borehole that is coaxial with said at least one second internal thread and that is open towards said tool head; and (f) said at least one fastening bolt further comprises an unthreaded, cylindrical centering section intermediate said thread sections, said centering section being received without play in said at least one first borehole and in said at least one second borehole.
Claim 2
Dependent Claim
242 words
A tool comprising: (a) a tool head having: (i) a longitudinal axis and (ii) at least one first internal thread having a first pitch and being parallel to said longitudinal axis of said tool head; (b) a tool support having: (i) a longitudinal axis that is coaxial with the longitudinal axis of said tool head and (ii) at least one second internal thread having a pitch different from said first pitch and being parallel to said longitudinal axis of said tool support, said at least one second internal thread being coaxial and synchronized with said at least one first internal thread; and (c) at least one fastening bolt comprising: (i) a first external thread section threadably engaged in said at least one first internal thread and (ii) a second external thread section threadably engaged in said at least one second internal thread, wherein: (d) said tool head has at least one first borehole that is coaxial with said at least one first internal thread and that is open towards said tool support; (e) said tool support has at least one second borehole that is coaxial with said at least one second internal thread and that is open towards said tool head; and (f) said at least one fastening bolt further comprises an unthreaded, cylindrical centering section intermediate said thread sections, said centering section being received without play in said at least one first borehole and in said at least one second borehole.
Claim 3
Dependent Claim
58 words
A tool as recited in claim 1, wherein: (a) said at least one fastening bolt is received in its entirety inside said tool head and said tool support when said tool is in its assembled state and (b) said at least one fastening bolt is accessible only through a borehole when said tool is in its assembled state.
Claim 4
Dependent Claim
20 words
A tool as recited in claim 2, wherein said borehole is parallel to said longitudinal axis of said tool head.
Claim 5
Dependent Claim
14 words
A tool as recited in claim 1, wherein said borehole is a coolant borehole.
Claim 6
Dependent Claim
62 words
A tool as recited in claim 1, wherein: (a) said tool head has two first internal threads arranged in a diametrically opposed manner; (b) said tool support has two second internal threads arranged in a diametrically opposed manner; and (c) a fastening bolt as recited in claim 1 is threadably engaged in each one of said two first and second internal threads.
Claim 7
Dependent Claim
22 words
A tool as recited in claim 1, wherein said tool head and said tool support are both made of a metallic material.
Claim 8
Dependent Claim
17 words
A tool as recited in claim 6, wherein said tool head is made of a hard metal.
Claim 9
Dependent Claim
17 words
A tool as recited in claim 6, wherein said tool support is made of a hard metal.
Claim 10
Dependent Claim
22 words
A tool as recited in claim 1, and further comprising a sealing element placed between said tool support and said tool head.
Claim 11
Dependent Claim
17 words
A tool as recited in claim 1, wherein said first pitch is larger than said second pitch.
Claim 12
Dependent Claim
182 words
A coupling between a tool head and a tool support, said tool head and said tool support being fitted coaxially into each other by means of a fitting connection in the form of a recess and a projection and being braced to each other by means of at least one fastening bolt, and said fastening bolt extending in axial direction of said tool support and being adapted to engage with said tool support via a thread, characterized in that: (a) said fastening bolt is adapted to engage with said tool head via a further thread, said threads being synchronous threads having different gradients so that, when tightening said fastening bolt, said tool support and said tool head are braced to each other in axial direction, and (b) said fastening bolt includes a centering portion which is taken up free from play in the assembled state of said coupling partly in an expansion of a bore of said tool support and partly in an expansion of a bore of said tool head for centering said tool support with respect to said tool head.
Claim 13
Dependent Claim
182 words
A coupling between a tool head and a tool support, said tool head and said tool support being fitted coaxially into each other by means of a fitting connection in the form of a recess and a projection and being braced to each other by means of at least one fastening bolt, and said fastening bolt extending in axial direction of said tool support and being adapted to engage with said tool support via a thread, characterized in that: (a) said fastening bolt is adapted to engage with said tool head via a further thread, said threads being synchronous threads having different gradients so that, when tightening said fastening bolt, said tool support and said tool head are braced to each other in axial direction, and (b) said fastening bolt includes a centering portion which is taken up free from play in the assembled state of said coupling partly in an expansion of a bore of said tool support and partly in an expansion of a bore of said tool head for centering said tool support with respect to said tool head.
References Cited (Backward Citations)
US4099889A
Cited
US4684298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |