US3898010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for disassembly of a tapered, keyless connection by means of fluid pressure
Assignee: Twin Disc Inc
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Filing: 1974-11-01
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Granted: 1975-08-05
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Expires: 1994-11-01
Abstract
Abstract Apparatus and a method for utilizing hydraulic pressure to separate a tapered, keyless connection between two members, for example between a shaft and a gear press-fit thereon. The invention includes the use of a threaded bolt means for building up the hydraulic pressure and furthermore contemplates the use of Teflon tape around the bolt means so as to seal the bolt means at its threaded aperture to enable the application of sufficient hydraulic force to cause the parts to be separated. Fluid such as grease or oil is placed in passageways in the parts and when the pressure is applied by tightening the threaded member, the parts are forcibly separated and to prevent them from flying apart in a hazardous manner, other bolt means which connect the parts are backed-off partially so as to stop the separating movement between the parts after the tapered joint has been broken.
Inventors
- 👤 Leroy F Jungbluth
- 👤 James B Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:17
CPC Classifications
B; B23; B23P; B23P11/00; B23P11/02; B23P11/022; Y; Y10; Y10T; Y10T403/00; Y10T403/16; Y10T403/1633
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
146 words
An assembly having inner and outer members connected together by a tapered and keyless connection and comprising, an inner member having an axially tapered portion, said inner member having a plurality of axially aligned threaded holes which are alignable with corresponding holes in a keeper portion of said outer member, one of said threaded holes having a fluid passage connection with said tapered connection between said members, fluid in said one threaded hole and said fluid passage connection, threaded members extending through said holes in said keeper portion and threadably engaged in said threaded holes, Teflon tape around a threaded portion of said one of said threaded members for engagement in said one threaded hole whereby forcible threaded engagement of said threaded member into said threaded hole permits fluid pressure built-up in said threaded hole and in between said tapered connection for separation of said members.
Claim 2
Dependent Claim
146 words
An assembly having inner and outer members connected together by a tapered and keyless connection and comprising, an inner member having an axially tapered portion, said inner member having a plurality of axially aligned threaded holes which are alignable with corresponding holes in a keeper portion of said outer member, one of said threaded holes having a fluid passage connection with said tapered connection between said members, fluid in said one threaded hole and said fluid passage connection, threaded members extending through said holes in said keeper portion and threadably engaged in said threaded holes, Teflon tape around a threaded portion of said one of said threaded members for engagement in said one threaded hole whereby forcible threaded engagement of said threaded member into said threaded hole permits fluid pressure built-up in said threaded hole and in between said tapered connection for separation of said members.
Claim 3
Dependent Claim
43 words
The assembly set forth in claim 1 further characterized in that said fluid passage connection includes an annular groove in The periphery of said axially tapered portion of said inner member, and a fluid passage connects said one threaded hole with said groove.
Claim 4
Dependent Claim
196 words
An assembly having inner and outer members connected together by a tapered and keyless connection and comprising, an inner member having an axially tapered portion, an outer member having a complementary shaped tapered opening and axially slideable on said inner member tapered portion to form a tight press-fit therewith, said outer member having a keeper portion through which a plurality of holes extend in an axial direction, said inner member having a plurality of axially aligned threaded holes which are alignable with said holes in said keeper portion, one of said threaded holes having a fluid passage connection with said tapered connection between said members, fluid in said one threaded hole and said fluid passage connection, threaded members extending through said holes in said keeper portion and threadably engaged in said threaded holes, Teflon tape around a threaded portion of one of said threaded members for engagement in said one threaded hole whereby threaded engagement of said threaded member into said threaded hole permits fluid pressure build-up in said threaded hole and in betweeen said tapered connection for separation of said members when said other threaded members are backed off partially in their corresponding threaded holes.
Claim 5
Dependent Claim
196 words
An assembly having inner and outer members connected together by a tapered and keyless connection and comprising, an inner member having an axially tapered portion, an outer member having a complementary shaped tapered opening and axially slideable on said inner member tapered portion to form a tight press-fit therewith, said outer member having a keeper portion through which a plurality of holes extend in an axial direction, said inner member having a plurality of axially aligned threaded holes which are alignable with said holes in said keeper portion, one of said threaded holes having a fluid passage connection with said tapered connection between said members, fluid in said one threaded hole and said fluid passage connection, threaded members extending through said holes in said keeper portion and threadably engaged in said threaded holes, Teflon tape around a threaded portion of one of said threaded members for engagement in said one threaded hole whereby threaded engagement of said threaded member into said threaded hole permits fluid pressure build-up in said threaded hole and in betweeen said tapered connection for separation of said members when said other threaded members are backed off partially in their corresponding threaded holes.
Claim 6
Dependent Claim
43 words
The assembly set forth in claim 3 further characterized in that said fluid passage connection includes an annular groove in the periphery of said axially tapered portion of said inner member, and a fluid passage connects said one threaded hole with said groove.
Claim 7
Dependent Claim
233 words
An assembly having inner and outer members connected together by a tapered and keyless connection and comprising, an inner member having an axially tapered portion, an outer member having a complementary shaped tapered opening and axially slideable on said inner member tapered portion to form a tight press-fit therewith, said outer member having a keeper portion through which a plurality of holes extend in an axial direction, said inner member having a plurality of axially aligned threaded holes which are alignable with said holes in said keeper portion, one of said threaded holes having a fluid passage connection with said tapered connection between said members, fluid in said one threaded hole and said fluid passage connection, threaded members extending through said holes in said keeper portion and threadably engaged in said threaded holes, said threaded members each having an outer and enlarged wrench receiving end, Teflon tape around a threaded portion of one of said threaded members for engagement in said one threaded hole whereby threaded engagement of said threaded member into said threaded hole permits fluid pressure build-up in said threaded hole and in between said tapered connection, whereby when said other threaded members are backed off partially in their corresponding threaded holes, said members are forcibly separated in an axial direction to an extent permitted by said keeper portion abutting against the enlarged wrench receiving ends of said other threaded members.
Claim 8
Dependent Claim
233 words
An assembly having inner and outer members connected together by a tapered and keyless connection and comprising, an inner member having an axially tapered portion, an outer member having a complementary shaped tapered opening and axially slideable on said inner member tapered portion to form a tight press-fit therewith, said outer member having a keeper portion through which a plurality of holes extend in an axial direction, said inner member having a plurality of axially aligned threaded holes which are alignable with said holes in said keeper portion, one of said threaded holes having a fluid passage connection with said tapered connection between said members, fluid in said one threaded hole and said fluid passage connection, threaded members extending through said holes in said keeper portion and threadably engaged in said threaded holes, said threaded members each having an outer and enlarged wrench receiving end, Teflon tape around a threaded portion of one of said threaded members for engagement in said one threaded hole whereby threaded engagement of said threaded member into said threaded hole permits fluid pressure build-up in said threaded hole and in between said tapered connection, whereby when said other threaded members are backed off partially in their corresponding threaded holes, said members are forcibly separated in an axial direction to an extent permitted by said keeper portion abutting against the enlarged wrench receiving ends of said other threaded members.
Claim 9
Dependent Claim
43 words
The assembly set forth in claim 5 further characterized in that said fluid passage connection includes an annular groove in the periphery of said axially tapered portion of said inner member, and a fluid passage connects said one threaded hole with said groove.
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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |