US3650509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free rotor vibrator
Assignee: Malan Vibrator Co Inc
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Filing: 1970-09-29
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Granted: 1972-03-21
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Expires: 1990-09-29
Abstract
Abstract A free rotor vibrator of the class including a case with an internal cylinder race within which a rotor of less diameter orbits in bearing contact therewith so as to exert a radial centrifugal force which is useful in fields such as the placement of concrete. The invention includes valving means for sequentially connecting force means such as plungers to sources of fluid under alternately elevated and reduced pressure so as to cause the rotor to orbit in the case. The valving means comprises a rigid rod with a universally pivoted joint at each end, one of which joints carries valving means which sequentially overlaps passages to the force means and connects them alternately to the regions of elevated and reduced pressure.
Inventors
- 👤 Leroy E Swerdfeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:26
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/18; B06B1/186
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
331 words
A free-rotor vibrator comprising: a case; an internal cylindrical race in the case having a central axis and a diameter; a rotor in said case; an outer cylindrical bearing surface on the rotor with a central axis and a diameter smaller than that of the race, the bearing surface being in rolling, bearing contact with the race so as to orbit in the race with the central axes laterally spaced from and parallel to one another and exerting a radial centrifugal force as it orbits; a plurality of angularly spaced-apart force means mounted in the rotor for reciprocating motion to extend beyond the rotor to contact the case so as to exert a separative force between the rotor and the case and to retract within the rotor so as to cause the rotor to orbit in the case; and valving means for sequentially connecting respective valving means to a source of fluid under pressure and alternately connecting the same to a region of lower pressure, said valving means comprising: a rigid valve rod; a first universally pivoted joint joining one end of the valve rod; a first universally pivoted joint joining one end of the valve rod to the case at the central axis of the case, and a second universally pivoted joint joining the other end of the valve rod to the rotor at the central axis of the rotor; wobble plate means rigidly attached to the rod at said other end having valving edges normal to the axis of the valve rod whereby the valving means has an upper and lower portion as viewed relative to the axis of the case, which portions rotate relative to the case as the rotor orbits therein; and a passage through the rotor to each force means terminating at a point contiguous to said second pivoted joint and disposed axially relative to the case axis such as to be periodically and sequentially overlapped by the upper and lower portions of the valve edge.
Claim 2
Dependent Claim
331 words
A free-rotor vibrator comprising: a case; an internal cylindrical race in the case having a central axis and a diameter; a rotor in said case; an outer cylindrical bearing surface on the rotor with a central axis and a diameter smaller than that of the race, the bearing surface being in rolling, bearing contact with the race so as to orbit in the race with the central axes laterally spaced from and parallel to one another and exerting a radial centrifugal force as it orbits; a plurality of angularly spaced-apart force means mounted in the rotor for reciprocating motion to extend beyond the rotor to contact the case so as to exert a separative force between the rotor and the case and to retract within the rotor so as to cause the rotor to orbit in the case; and valving means for sequentially connecting respective valving means to a source of fluid under pressure and alternately connecting the same to a region of lower pressure, said valving means comprising: a rigid valve rod; a first universally pivoted joint joining one end of the valve rod; a first universally pivoted joint joining one end of the valve rod to the case at the central axis of the case, and a second universally pivoted joint joining the other end of the valve rod to the rotor at the central axis of the rotor; wobble plate means rigidly attached to the rod at said other end having valving edges normal to the axis of the valve rod whereby the valving means has an upper and lower portion as viewed relative to the axis of the case, which portions rotate relative to the case as the rotor orbits therein; and a passage through the rotor to each force means terminating at a point contiguous to said second pivoted joint and disposed axially relative to the case axis such as to be periodically and sequentially overlapped by the upper and lower portions of the valve edge.
Claim 3
Dependent Claim
31 words
A vibrator according to claim 1 wherein the pivoted joints are ball-socket assemblies, and in which the valving edges are circular and lie normal to the axis of the valve rod.
Claim 4
Dependent Claim
29 words
A vibrator according to claim 2 wherein the ball of the respective ball-socket assembly is disposed on the valve rod, and the socket on the respective case or rotor.
Claim 5
Dependent Claim
19 words
A vibrator according to claim 1 in which the force means comprises plungers slidably fitted in respective plunger passages.
Claim 6
Dependent Claim
16 words
A vibrator according to claim 4 in which said plunger passages open onto the bearing surface.
Claim 7
Dependent Claim
155 words
A vibrator according to claim 1 in which the second pivoted joint includes a ball-like member mounted to the valve rod bounded by a zone of a sphere, making a fluid sealing fit with a socket in the rotor, the zone being bounded by two valving edges lying in planes normal to the axis of the valve rod, and in which the casing includes a pressure line adapted to be connected to a source of fluid under pressure and in fluid communication with one of said valving edges, an exhaust line in the rotor in fluid communication with the other of the valving edges and terminating also at an end face of the rotor, and in which the case further includes an exhaust groove in an end face facing and in sliding contact with the said end face on the vibrator, said groove and said exhaust line being in constant fluid connection with one another.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |