Patent US3728037A successfully refreshed from Google Patents.
US3728037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable floating reamer
Assignee: Kennametal Inc
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Filing: 1971-11-04
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Granted: 1973-04-17
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Expires: 1991-11-04
Abstract
Abstract An adjustable floating reamer characterized in that a shank member has a slot diametrically thereacross in which overlapping reamer blades are simultaneously adjusted radially outwardly or inwardly by an adjusting sleeve which is rotatable on said shank member and which has threaded engagement with an axially movable cam means engaged with said blades, said adjusting sleeve being spring-biased into frictional engagement with a shoulder on said shank member thus to retain the blade adjustment without additional locking means. Moreover, the present invention is further characterized in that the frictional retaining engagement between the adjusting sleeve and the shank member is increased upon imposition of radial inward load on the reamer blades. Yet another characterizing feature of this invention is the mounting of the blades for radial floating movement about parallel axes which are perpendicular to the slot in which the blades are slidable.
Inventors
- 👤 M Benjamin
- 👤 W Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:22
CPC Classifications
B; B23; B23D; B23D77/00; B23D77/02; B23D77/04; B23D77/042; B23D2277/00; B23D2277/56; Y; Y10; Y10T; Y10T408/00; Y10T408/83; Y10T408/85; Y10T408/858; Y10T408/8588; Y10T408/85892; Y10T408/85895
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
An adjustable reamer comprising a holder having an axial slot diametrically thereacross; a pair of juxtaposed reamer blades radially slidable in said slot and having cutting edges at their outer extremities; screw actuated cam means engaged with said blades to move the latter simultaneously radially inward or outward in response to axial movement of said cam means in opposite directions in said holder; an adjusting sleeve rotatable on said holder and having screw threaded engagement with said cam means; said sleeve and holder having radially overlapping surfaces; and spring means biasing said surfaces into frictional engagement with each other thus to frictionally retain said sleeve in desired rotary position.
Claim 2
Dependent Claim
109 words
An adjustable reamer comprising a holder having an axial slot diametrically thereacross; a pair of juxtaposed reamer blades radially slidable in said slot and having cutting edges at their outer extremities; screw actuated cam means engaged with said blades to move the latter simultaneously radially inward or outward in response to axial movement of said cam means in opposite directions in said holder; an adjusting sleeve rotatable on said holder and having screw threaded engagement with said cam means; said sleeve and holder having radially overlapping surfaces; and spring means biasing said surfaces into frictional engagement with each other thus to frictionally retain said sleeve in desired rotary position.
Claim 3
Dependent Claim
31 words
The reamer of claim 1 wherein said cam means is arranged so that radial inward thrust load on said blades increases the magnitude of frictional engagement of said radially overlapped surfaces.
Claim 4
Dependent Claim
132 words
The reamer of claim 1 wherein said cam means comprises a prismatic cam block having pairs of parallel lateral faces slidably engaged in oppositely inclined grooves in the juxtaposed faces of the respective blades, and an axially movable screw member which at one end straddles the radially overlapped portions of said blades and is connected to said cam block about a pivot axis perpendicular to said blade-receiving slot and which at the other end has a shank portion extending into a bore in said holder, said screw member being nonrotatably connected to said holder by means of a pin extending diametrically therethrough and through an axial slot in said holder which is perpendicular to said blade-receiving slot, the ends of said pin having screw means in threaded engagement with said adjusting sleeve.
Claim 5
Dependent Claim
41 words
The reamer of claim 3 wherein said spring means is disposed in the bore of said holder to bear on the shank portion of said screw member, thus to urge the overlapping surfaces of said holder and sleeve into frictional engagement.
Claim 6
Dependent Claim
38 words
The reamer of claim 4 wherein said screw member has a radial clearance with the bore in said holder whereby said blades and cam block may float radially of said holder about such pivot axis and said pin.
Claim 7
Dependent Claim
28 words
The reamer of claim 1 wherein said sleeve and holder have other radially overlapping surfaces which preclude axial movement of said frictionally engaged surfaces away from each other.
Claim 8
Dependent Claim
31 words
The reamer of claim 1 wherein said sleeve has setscrew means engageable with said holder to prevent rotation of said sleeve on said holder except upon loosening of said setscrew means.
Claim 9
Dependent Claim
23 words
The reamer of claim 1 wherein said radially overlapping surfaces comprise a shoulder on said holder and the adjacent end of said sleeve.
Claim 10
Dependent Claim
55 words
The reamer of claim 8 wherein said cam means, when moved axially toward and away from said blades, respectively actuates the latter radially inwardly and outwardly; and wherein inward thrust load on said blades tends to draw said sleeve toward said blades to effect tight engagement of the end of said sleeve with said shoulder.
References Cited (Backward Citations)
GB589954A
Cited
US2490397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |