US3756735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration tamper
Assignee: Bopparder Maschinenbau GmbH
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Filing: 1971-10-15
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Granted: 1973-09-04
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Expires: 1991-10-15
Abstract
Abstract A tamping machine including a motor, a crank driven by said motor over an appropriate mechanical transmission, a linkage connecting the crank to a vertically reciprocating plunger disc, a tamping foot disposed beneath the plunger disc, a housing encasing the crank, linkage and the upper end of the tamping foot, a first set of springs for urging the tamping foot to move in response to movement of the plunger disc, and a second set of springs for damping the shock forces created within the machine when the tamping foot strikes the material to be compacted. The second set of springs eliminates, or at least minimizes, the wear and tear on the drive mechanism of the tamping machine caused by the shock forces by transmitting, directly or indirectly, a substantial portion of such shock forces to the sturdy machine body. The second set of springs are connected between the machine body and the plunger disc and/or tamping foot.
Inventors
- 👤 A Linz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:46
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/02; E02D3/046; E02D3/068
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
192 words
A tamping machine comprising: a. a body, b. a motor mounted upon said body, c. transmission means driven by said motor, d. a rotatable crank driven by the transmission means, e. a plunger disc disposed below said body, f. a linkage connected at one end to said crank and connected at the opposite end to said plunger disc for translating the rotary movement of said crank into reciprocating vertical movement of said plunger disc, g. a tamping foot disposed below said plunger disc, h. first spring means connected between said foot and said disc for urging said tamping foot to respond to the movement of said plunger disc, i. a large housing encasing the connecting linkage and plunger disc, said large housing opening downwardly to receive therein the upper end of the tamping foot, j. elongated guide rods extending in a vertical plane through the interior of the large housing, and k. second spring means operatively associated at the one end with the plunger disc and tamper foot and connected at the opposite end to said housing for damping the shocks created when the tamper foot strikes the material to be compressed.
Claim 2
Dependent Claim
192 words
A tamping machine comprising: a. a body, b. a motor mounted upon said body, c. transmission means driven by said motor, d. a rotatable crank driven by the transmission means, e. a plunger disc disposed below said body, f. a linkage connected at one end to said crank and connected at the opposite end to said plunger disc for translating the rotary movement of said crank into reciprocating vertical movement of said plunger disc, g. a tamping foot disposed below said plunger disc, h. first spring means connected between said foot and said disc for urging said tamping foot to respond to the movement of said plunger disc, i. a large housing encasing the connecting linkage and plunger disc, said large housing opening downwardly to receive therein the upper end of the tamping foot, j. elongated guide rods extending in a vertical plane through the interior of the large housing, and k. second spring means operatively associated at the one end with the plunger disc and tamper foot and connected at the opposite end to said housing for damping the shocks created when the tamper foot strikes the material to be compressed.
Claim 3
Dependent Claim
30 words
The tamping machine as defined in claim 1 wherein said second spring means is connected between said plunger disc and said housing for indirectly transmitting shock forces to said housing.
Claim 4
Dependent Claim
30 words
The tamping machine as defined in claim 1 wherein said second spring means is connected between said tamper foot and said housing for directly transmitting shock forces to said housing.
Claim 5
Dependent Claim
55 words
The tamping machine as defined in claim 1 wherein said second spring means comprises a plurality of pairs of springs, each pair being concentrically mounted about one of said elongated guide rods, one spring in each pair exerting a biasing force in opposition to the biasing force exerted by the other spring in eAch pair.
Claim 6
Dependent Claim
25 words
The tamping machine as defined in claim 1 wherein said first spring means are concentrically mounted upon the lower ends of said elongated guide rods.
Claim 7
Dependent Claim
39 words
The tamping machine as defined in claim 1 wherein said plunger disc has apertures formed therein for permitting the elongated guide rods to pass therethrough, whereby said disc can be moved vertically along said rods within the large housing.
Claim 8
Dependent Claim
93 words
The tamping machine as defined in claim 1 wherein said large housing further includes projections on its inner wall extending horizontally inwardly toward the interior of the housing, one of said projections being provided for each one of said plurality of elongated guide rods, each projection having an aperture formed therein, and a plurality of sleeves, one sleeve positioned within each aperture in each projection to permit one of said plurality of guide rods to pass freely therethrough in a vertical direction and to mount said second spring means on said guide rods.
Claim 9
Dependent Claim
141 words
The tamping machine as defined in claim 1 wherein said tamping foot has a cavity defined in its upper surface, said machine further including: a small housing secured to the underside of said plunger disc, said housing having an aperture in its lower wall, said housing being sufficiently small so as to be received within said cavity when the plunger disc is moved relative to the tamping foot, a relatively short guide rod extending vertically upwardly from the center of the cavity on said tamping foot, said guide rod extending into the interior of said housing through said aperture, and having an abutment at its upper free end, and third spring means disposed concentrically about said short guide rod between said abutment and the lower wall of said housing, said third spring means acting in opposition to said first spring means.
Claim 10
Dependent Claim
91 words
The tamping machine as defined in claim 1 wherein said tamping foot comprises a top wall, a bottom wall that engages the material to be compacted, and a sidewall that joins said top and bottom walls, said machine further comprising: a cylindrical housing depending from the top wall of the tamping foot into the interior thereof, said plunger disc being located within said housing, said top wall of said cylindrical housing having an aperture formed therein to permit the linkage to pass therethrough and move said plunger disc within said housing.
Claim 11
Dependent Claim
90 words
The tamping machine as defined in claim 9 wherein said first spring means is positioned within said cylindrical housing between the plunger disc and the bottom of said small housing, and said machine further includes: third spring means positioned within said housing between said plunger disc and the upper wall of said small housing, said third spring means being positioned about the part of said linkage that extends through the aperture into the interior of said housing, and said third spring means acting in opposition to said first spring means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |