Patent US3914870A successfully refreshed from Google Patents.
US3914870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for checking the respective eccentricity of the inner and the outer surfaces of tubes or sleeves
Assignee: Wieland Werke AG
•
Filing: 1973-10-01
•
Granted: 1975-10-28
•
Expires: 1993-10-01
Abstract
Abstract Device for checking concentricity of the inner and outer surfaces of tubular members. An inner and outer set of probes define two axes. Each probe is movable with respect to the respective centering axis. The three probes of each set, such as the inner set, engages the sample so that the axis of the sample coincides with the centerline of the inner set of three probes. The outer set of three probes is mounted on supporting substructures for the inner probes and each probe of the outer set is pivotal with respect thereto. The angular deviation of the outer set of probes with respect to the inner set of probes will indicate the eccentricity of the outer surface of the sample with respect to the inner surface thereof. Indicator means are attached to the inner and outer sets of probes to provide electrical or other indication of the relative positions thereof.
Inventors
- 👤 Hans Wiedenmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:16
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/08; G01B5/20
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
163 words
A device for checking the relative eccentricity between the inner and outer surfaces of an elongated hollow member, comprising: a frame defining a first axis; two sets of probes mounted on said frame, one of said sets of probes including first movable contact means for simultaneously radially engaging one of said inner and outer surfaces to locate a second axis of said one of said inner and outer surfaces coaxial with said first axis of said frame, the other of said sets of probes including second movable contact means for radially moving into engagement with the other of said inner and outer surfaces to locate a third axis of said other of said inner and outer surfaces relative to said axis of said frame; and indicator means operatively connected to said other set of probes for indicating the relative displacement between said third axis from said coaxial first and second axes to thereby indicate the relative eccentricity between said inner and outer surfaces.
Claim 2
Independent Claim
163 words
A device for checking the relative eccentricity between the inner and outer surfaces of an elongated hollow member, comprising: a frame defining a first axis; two sets of probes mounted on said frame, one of said sets of probes including first movable contact means for simultaneously radially engaging one of said inner and outer surfaces to locate a second axis of said one of said inner and outer surfaces coaxial with said first axis of said frame, the other of said sets of probes including second movable contact means for radially moving into engagement with the other of said inner and outer surfaces to locate a third axis of said other of said inner and outer surfaces relative to said axis of said frame; and indicator means operatively connected to said other set of probes for indicating the relative displacement between said third axis from said coaxial first and second axes to thereby indicate the relative eccentricity between said inner and outer surfaces.
Claim 3
Dependent Claim
82 words
The device according to claim 1, wherein said first contact means on said probes of said one set contact said one of said inner and outer surfaces of said elongated hollow member at locations through which a pair of spaced and parallel planes extend, said second contact means on said probes of said other set contacting said other of said inner and outer surfaces at locations through which another plane extends, said another plane being parallel to said pair of parallel planes.
Claim 4
Dependent Claim
62 words
The device according to claim 1, wherein said indicator means comprises an elongated indicator rod extending generally parallel to said first axis, said indicator rod being pivotally connected to said frame by means defining a universal pivot connection, said indicator rod engaging said other set of said probes at a location spaced from said universal pivot connection and said second contact means.
Claim 5
Dependent Claim
56 words
The device according to claim 3, wherein said other set of probes comprise a plurality of two arm rocking levers pivotally secured to said frame for said one set of said probes intermediate the ends of said two arm rocking levers, one arm having said second contact means thereon, the other arm engaging said indicator rod.
Claim 6
Dependent Claim
24 words
The device according to claim 4, wherein said first contact means engage said inner surface and said second contact means engage said outer surface.
Claim 7
Dependent Claim
59 words
The device according to claim 4, wherein said indicator means further includes means defining a reference piece secured to said frame for said one set of said probes, the movement of said indicator rod relative to said reference piece, caused by said contact means engaging a nonconcentric surface, indicating said magnitude of eccentricity between said inner and outer surfaces.
Claim 8
Dependent Claim
55 words
The device according to claim 4, wherein said frame includes an annular ring, each of said two arm rocking levers being pivotally secured to said annular ring at equally spaced locations, the pivot axes for each of said rocking levers being tangent to a circle whose center is coincident with said axis of said frame.
Claim 9
Dependent Claim
42 words
The device according to claim 4, wherein said indicator means includes support means foR supporting said indicator rod for movement axially and concentrically of said frame, said indicator rod having a conical surface thereon engaging said other arms of said rocking levers.
Claim 10
Dependent Claim
54 words
The device according to claim 3, wherein said frame comprises a hollow sleeve, the axis of which defines said axis of said frame and having said first contact means mounted thereon, said first contact means being equally spaced around the periphery of said sleeve and contained in a pair of spaced and parallel planes.
Claim 11
Dependent Claim
28 words
The device according to claim 9, wherein said first contact means includes contact members and adjusting means for adjusting said contact members equally radially of said hollow sleeve.
Claim 12
Dependent Claim
57 words
The device according to claim 10, wherein said adjusting means include means defining a reciprocal, movable inclined surface engaging said contact members, said inclined surface being movable axially of said hollow sleeve to move said contact members radially of said hollow sleeve and into engagement with the internal surface of said opening in said elongated hollow member.
Claim 13
Dependent Claim
42 words
The device according to claim 11, wherein the axis of said hollow sleeve passes through the center of said universal pivot connection; and wherein said indicator means includes support means for supporting said indicator rod for movement axially of said hollow sleeve.
Claim 14
Dependent Claim
63 words
The device according to claim 12, wherein said support means also supports said adjusting means for said reciprocal movement, said hollow sleeve further having means therein defining a chamber between said indicator rod and said adjusting means and inlet passageway means to said chamber to permit a pressurization of said chamber and a resulting movement of said indicator rod and said adjusting means.
Claim 15
Dependent Claim
29 words
The device according to claim 13, including resilient means for returning said indicator rod and said adjusting means to an initial position prior to pressurization of said chamber means.
Claim 16
Dependent Claim
142 words
The device according to claim 3, wherein said indicator means further includes means defining a reference piece secured to said frame, the movement of said indicator rod relative to said reference piece, caused by said second contact means engaging a nonconcentric surface of said hollow member, indicating said magnitude of eccentricity between said inner and outer surfaces; and wherein said probes of said other set comprise a plurality of two arm rocking levers pivotally secured to said frame intermediate the ends thereof, one arm having said second contact means thereon, the other arm engaging said indicator rod; and wherein said reference piece is a hollow cylindrical member encircling said indicator rod and having a plurality of elongated slots therein each being adapted to receive said other arms of said rocking levers therethrough to permit said other arms to engage said indicator rod.
Claim 17
Dependent Claim
46 words
The device according to claim 15, wherein said indicator rod has at its free end remote from said universal pivot connection an enlarged contact head; and wherein said reference piece has an electrical contact ring connected thereto and adapted to be engaged by said enlarged head.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |