US3901104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission for concrete mixers
Assignee: Individual
•
Filing: 1973-06-07
•
Granted: 1975-08-26
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Expires: 1993-06-07
Abstract
Abstract Between the motor and the bowl is a transmission and speed control shifter. The shifter is a two position shifter in which the bowl can be driven at either high or low speed depending upon charging, discharging and transit conditions. The transmission consists of three stages each comprised of a planetary gear system. The shifter in one position utilizes only a portion of the first stage and then transmits further power through the entirety of the second and third stages. In a second position the shifter utilizes the entirety of the planetary gear systems of the first, second and third stages to achieve lower speed mix rate of the bowl. The two advantages sought and obtained are that presently installed and used transmission systems can be modified to secure two speed control and the additional transmission elements are all of standard size and construction.
Inventors
- 👤 Royal W Sims
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:58
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/62; F16H3/64; B; B28; B28C; B28C5/00; B28C5/42; B28C5/4203; B28C5/4206; B28C5/421; F16H61/00; F16H61/02; F16H61/0293; F16H2716/00; F16H2716/02; Y; Y10; Y10S; Y10S366/00; Y10S366/606; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19228
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
171 words
An improved transmission for concrete mixers comprising a shifter mechanism having two independently movable and relatively laterally displaceable first and second drive members, said first drive member being selectively movably into engagement with a sun gear of the first of three intermittently engageable planetary gear assemblies, said second And third planetary gear assemblies being connected serially together and to a preselected portion of said first planetary gear system to effect a drivable connection between a prime mover and a mixing bowl, said second independently movable drive member being selectively engageable with a second portion of said first planetary gear assembly when said first drive member is disengaged to provide a second drive connection effecting a different speed between said prime mover and bowl and consisting of a gear member which forms a direct drive with a different portion of said first planetary gear assembly than said first drive and bypassing the sun and planetary gear portion of said first planetary assembly but utilizing the interfaced second and third planetary gear assemblies.
Claim 2
Dependent Claim
171 words
An improved transmission for concrete mixers comprising a shifter mechanism having two independently movable and relatively laterally displaceable first and second drive members, said first drive member being selectively movably into engagement with a sun gear of the first of three intermittently engageable planetary gear assemblies, said second And third planetary gear assemblies being connected serially together and to a preselected portion of said first planetary gear system to effect a drivable connection between a prime mover and a mixing bowl, said second independently movable drive member being selectively engageable with a second portion of said first planetary gear assembly when said first drive member is disengaged to provide a second drive connection effecting a different speed between said prime mover and bowl and consisting of a gear member which forms a direct drive with a different portion of said first planetary gear assembly than said first drive and bypassing the sun and planetary gear portion of said first planetary assembly but utilizing the interfaced second and third planetary gear assemblies.
Claim 3
Dependent Claim
34 words
The improved transmission in accordance with claim 1 wherein the planetary gear arrangements are disposed in series and are selectively coupled to effect, in accordance with the gear train, a selected bowl speed control.
Claim 4
Dependent Claim
43 words
The improved transmission in accordance with claim 1 including operating means which are splined together to provide co-rotating first and second gear means selectively engageable with a predetermined portion of the adjacent planetary gear of the first of three in-series planetary gear systems.
Claim 5
Dependent Claim
66 words
The improved transmission in accordance with claim 1 wherein the first, second and third stage planetary gears are connected in series and means for acting only through a portion of the first stage, and means for acting through the entirety of said first stage whereby the output of said first stage to the combination of the successively connected second and third stages determine the bowl speed.
Claim 6
Dependent Claim
27 words
The improved transmission in accordance with claim 1 wherein each of the sun, planetary and ring gears of the three stages is of standard size and construction.
Claim 7
Dependent Claim
37 words
The improved transmission in accordance with claim 1 including mechanically operable means for laterally shifting on spline connections, a first and second gear operator which determines the operative portion of the first planetary gear stage operated thereby.
Claim 8
Dependent Claim
75 words
A process for transmitting rotational energy to a mixing bowl at one of two preselected speeds comprising the steps of selectively engaging independently movable and relatively displaceable first and second drive gear members of a first stage planetary gear system, coupling said first stage with a combination of in-series second and third stage planetary gears and connecting the output of said third stage to a bowl for effectively driving said bowl at a predetermined speed.
Claim 9
Dependent Claim
75 words
A process for transmitting rotational energy to a mixing bowl at one of two preselected speeds comprising the steps of selectively engaging independently movable and relatively displaceable first and second drive gear members of a first stage planetary gear system, coupling said first stage with a combination of in-series second and third stage planetary gears and connecting the output of said third stage to a bowl for effectively driving said bowl at a predetermined speed.
Claim 10
Dependent Claim
30 words
The process in accordance with claim 7 including the step of mechanically shifting relatively to each other one of two gear operators to effectively determine the rate of bowl speed.
Claim 11
Dependent Claim
55 words
The process in accordance with claim 7 wherein said first stage planetary gear includes sun, planetary and ring gear portions which are predeterminately operated and transmitting force from said first stage to successive second stage and third stage planetary gear systems, wherein that portion of said first stage is operated to effectively determine bowl speed.
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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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |