Patent US3756572A successfully refreshed from Google Patents.
US3756572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Truck mixer forward support and drive means
Assignee: Rex Chainbelt Inc
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Filing: 1972-06-20
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Granted: 1973-09-04
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Expires: 1992-06-20
Abstract
Abstract A truck mounted concrete mixer has a hydraulic drive through a gear reduction unit at the forward end of the mixing drum. A support column attached to the truck frame supports the gear reduction unit in a manner to minimize transmittal of truck frame deflections under operating condition to the gears in the gear reduction unit. Specifically, the front of the gear reduction unit is connected to the support column at a point in front of the drum support shaft while the rear of the gear reduction unit is rigidly connected to the support column on a line transverse to the axis of the drum and below the point of support of the forward end of the drum.
Inventors
- 👤 W Buelow
- 👤 J Mohrbacker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:09
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/42; B28C5/4203; B28C5/4265
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
144 words
In a concrete mixer for mounting on a truck frame, said mixer having a drum for receiving, mixing and discharging concrete and journal bearings supporting one end thereof; means for supporting and driving the other end of said drum and comprising a support column having its lower end adapted to be secured to the truck frame and upper support and securement surfaces, a gear reduction unit having an output shaft coupled to the other end of said drum, said gear reduction unit resting on and secured to the support and securement surfaces of said support column, one of said securement surfaces being substantially directly beneath said output shaft on one side of the gear reduction unit and the other of said securement surfaces being on the other side of the gear reduction unit and in a generally vertical plane extending through the output shaft.
Claim 2
Dependent Claim
144 words
In a concrete mixer for mounting on a truck frame, said mixer having a drum for receiving, mixing and discharging concrete and journal bearings supporting one end thereof; means for supporting and driving the other end of said drum and comprising a support column having its lower end adapted to be secured to the truck frame and upper support and securement surfaces, a gear reduction unit having an output shaft coupled to the other end of said drum, said gear reduction unit resting on and secured to the support and securement surfaces of said support column, one of said securement surfaces being substantially directly beneath said output shaft on one side of the gear reduction unit and the other of said securement surfaces being on the other side of the gear reduction unit and in a generally vertical plane extending through the output shaft.
Claim 3
Dependent Claim
61 words
The support and drive means of claim 1 wherein the support column is of welded metal plate construction and has laterally spaced sides adapted to rest on and to be secured to the two longitudinal frame members of a conventional truck and having a rectangular upper section which surrounds the lower part of a gear case of the gear reduction unit.
Claim 4
Dependent Claim
40 words
The support and drive means of claim 2 wherein the gear reduction unit includes a gear case comprising joined upper and lower sections, the upper section including said brackets and the lower section depending therefrom and within the support column.
Claim 5
Dependent Claim
25 words
The support and drive means of claim 3 wherein the lower section includes mounting means for the direct attachment and support of a drive motor.
Claim 6
Dependent Claim
185 words
In a rotary drum concrete mixer mounted on a truck including gear means for driving the closed end of the drum, the improvements in mounting and supporting the gear means to minimize transmission of truck frame movement to the gears thereof, comprising a drum support for the closed end of the rotary drum, a gear case housing and supporting the gear means for driving the drum, an upright columnar support with its lower end attached to the truck, a first rigid connection between the upper end of the columnar support and the gear case extending transverse to an axis of rotation of the drum and positioned on one side of the gear case and below the drum support for the closed end of the drum, a second rigid connection between the upper end of the columnar support and the gear case in a vertical plane containing the axis of rotation of the drum and on the other side of the gear case respecting the first rigid connection, the first and second rigid connections constituting the only connections between the gear case and the columnar support.
Claim 7
Dependent Claim
185 words
In a rotary drum concrete mixer mounted on a truck including gear means for driving the closed end of the drum, the improvements in mounting and supporting the gear means to minimize transmission of truck frame movement to the gears thereof, comprising a drum support for the closed end of the rotary drum, a gear case housing and supporting the gear means for driving the drum, an upright columnar support with its lower end attached to the truck, a first rigid connection between the upper end of the columnar support and the gear case extending transverse to an axis of rotation of the drum and positioned on one side of the gear case and below the drum support for the closed end of the drum, a second rigid connection between the upper end of the columnar support and the gear case in a vertical plane containing the axis of rotation of the drum and on the other side of the gear case respecting the first rigid connection, the first and second rigid connections constituting the only connections between the gear case and the columnar support.
Claim 8
Dependent Claim
31 words
A rotary drum concrete mixer mounted on a truck as in claim 5 further comprising a hydraulic motor for driving the gear means, the hydraulic motor carried by the gear case.
Claim 9
Dependent Claim
61 words
A rotary drum concrete mixer mounted on a truck as in claim 6 wherein the gear case is divided horizontally into two sections, a strong upper section and a lightweight lower section, and the fixed connections of the gear case to the columnar support are at the division between the sections, and the hydraulic motor is carried by the lower section.
Claim 10
Dependent Claim
23 words
A rotary drum concrete mixer mounted on a truck as in claim 7 wherein the columnar support is a hollow box section column.
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) | 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 |