US3716731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for rectilinear guiding of a machine member along a beam
Assignee: SKF Industrial Trading and Development Co BV
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Filing: 1971-07-19
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Granted: 1973-02-13
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Expires: 1991-07-19
Abstract
Abstract In a rectilinear guiding, a machine member being moveably supported on recirculating balls along a straight guide, said guide being designed as a beam, the cross sectional structure of which giving a high resistance to bending in all directions. Angular contact ball tracksbeing formed in machine member and beam, which latter is designed with ramps forming tangents to said tracks and smoothly sloping away therefrom in order to give the balls a smooth operation at the entry to and the egress from the loaded zone. The beam may preferably be composed by a compound material and serve as an active part of an electric linear motor being attached to the machine member.
Inventors
- 👤 S Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:43
CPC Classifications
F; F16; F16C; F16C29/00; F16C29/04; F16C29/06; F16C29/0676; F16C29/068; F16C29/0692; F16C29/0695; H; H02; H02K; H02K41/00; H02K41/02; H02K41/025; H02K41/03
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
136 words
The combination of a machine member and elongated beam adapted for motion relative to one another, said beam being generally symmetrical about a longitudinal center plane and formed with at least two parallel arcuate tracks on either side of said center plane, said machine member including an arcuate trackway for each of said tracks and disposed relative thereto defining a runway providing for angular contact with ball elements engageable therein, means defining a recirculation bore in said machine member for each of said cooperating pairs of tracks and trackways, end passages interconnecting the ends of each recirculation bore with the ends of a corresponding ball runway, saId machine member being formed with delivery ramps defined by surfaces on said beam, each surface extending tangentially from one of said tracks and angularly relative to said central plane.
Claim 2
Dependent Claim
136 words
The combination of a machine member and elongated beam adapted for motion relative to one another, said beam being generally symmetrical about a longitudinal center plane and formed with at least two parallel arcuate tracks on either side of said center plane, said machine member including an arcuate trackway for each of said tracks and disposed relative thereto defining a runway providing for angular contact with ball elements engageable therein, means defining a recirculation bore in said machine member for each of said cooperating pairs of tracks and trackways, end passages interconnecting the ends of each recirculation bore with the ends of a corresponding ball runway, saId machine member being formed with delivery ramps defined by surfaces on said beam, each surface extending tangentially from one of said tracks and angularly relative to said central plane.
Claim 3
Dependent Claim
136 words
The combination of a machine member and elongated beam adapted for motion relative to one another, said beam being generally symmetrical about a longitudinal center plane and formed with at least two parallel arcuate tracks on either side of said center plane, said machine member including an arcuate trackway for each of said tracks and disposed relative thereto defining a runway providing for angular contact with ball elements engageable therein, means defining a recirculation bore in said machine member for each of said cooperating pairs of tracks and trackways, end passages interconnecting the ends of each recirculation bore with the ends of a corresponding ball runway, saId machine member being formed with delivery ramps defined by surfaces on said beam, each surface extending tangentially from one of said tracks and angularly relative to said central plane.
Claim 4
Dependent Claim
136 words
The combination of a machine member and elongated beam adapted for motion relative to one another, said beam being generally symmetrical about a longitudinal center plane and formed with at least two parallel arcuate tracks on either side of said center plane, said machine member including an arcuate trackway for each of said tracks and disposed relative thereto defining a runway providing for angular contact with ball elements engageable therein, means defining a recirculation bore in said machine member for each of said cooperating pairs of tracks and trackways, end passages interconnecting the ends of each recirculation bore with the ends of a corresponding ball runway, saId machine member being formed with delivery ramps defined by surfaces on said beam, each surface extending tangentially from one of said tracks and angularly relative to said central plane.
Claim 5
Dependent Claim
55 words
The combination as claimed in claim 1 wherein the beam is formed of an elongated member having an I-shaped cross section forming the cross bar of the T-profiles and wherein the projection of the T-profiles are formed by sheet metal web members connected to the I-shaped cross bar and provided with ball tracks and ramps.
Claim 6
Dependent Claim
40 words
The combination as claimed in claim 1 wherein the beam is of double T-shaped cross section and wherein the webs of the T-profiles are aligned and the ball tracks are located at the juncture between the shanks of the T-profile.
Claim 7
Dependent Claim
46 words
The combination as claimed in claim 1 wherein the machine member is adapted to carry an electric driving means arranged for meshing engagement with cogs provided in the shank end surfaces of said T-profile, said shank end being arranged at right angles to said central plane.
Claim 8
Dependent Claim
45 words
The combination as claimed in claim 1 wherein said machine member is adapted to mount an electric linear motor and wherein the said beam is formed with a core of a conductive nonmagnetic material which in turn forms the armature for said electric linear motor.
References Cited (Backward Citations)
US3531666A
Cited
US3575650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |