US3733812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yarder having an infinite ratio driving interlock for spooling drums
Assignee: Smith Berger Manufacturing Corp
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Filing: 1970-04-22
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Granted: 1973-05-22
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Expires: 1990-04-22
Abstract
Abstract A yarder having a plurality of cable drums and a driving connection between the drums having an infinite variable driving ratio including an improved application of a hydraulic motor driving the haulback drum of a logging yarder allowing a controlled relative rotation between the drums. The pump for driving the motor is directly associated with the drive of the main drum. Further included are means for driving a mobile yarder mechanism using the power source and control mechanism for the drums as the motivating and control means for driving the tracks of the vehicle.
Inventors
- 👤 F Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:30
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/26; B66D2700/00; B66D2700/01; B66D2700/0125; B66D2700/0166; Y; Y10; Y10S; Y10S60/00; Y10S60/905; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19037
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
160 words
Mechanism for controlling the relative rotation of two shafts comprising, in combination with the two shafts, a main power plant, a secondary power plant comprising a pump and a rotatable hydraulic motor, a driving connection between the casing of the motor and one of said shafts, a driving connection between the rotor of the motor and the other of said shafts, a driving connection between the power plant and one of said shafts including controls for direction and speed of rotation, a direct driving connection between the main power plant and the pump of thE secondary power plant assuring a constant relative rate of rotation between the input drive speed and the pump, appropriate fluidic connections between the pump and the hydraulic motor and a driving connection between the rotor of the hydraulic motor and the shaft connected thereto whereby the relative rate of rotation of the two shafts can be controlled by altering the speed of the hydraulic motor.
Claim 2
Dependent Claim
160 words
Mechanism for controlling the relative rotation of two shafts comprising, in combination with the two shafts, a main power plant, a secondary power plant comprising a pump and a rotatable hydraulic motor, a driving connection between the casing of the motor and one of said shafts, a driving connection between the rotor of the motor and the other of said shafts, a driving connection between the power plant and one of said shafts including controls for direction and speed of rotation, a direct driving connection between the main power plant and the pump of thE secondary power plant assuring a constant relative rate of rotation between the input drive speed and the pump, appropriate fluidic connections between the pump and the hydraulic motor and a driving connection between the rotor of the hydraulic motor and the shaft connected thereto whereby the relative rate of rotation of the two shafts can be controlled by altering the speed of the hydraulic motor.
Claim 3
Dependent Claim
24 words
A mechanism as in claim 1 further including an auxiliary high pressure pump driven by the prime mover and connected to the hydraulic motor.
Claim 4
Dependent Claim
23 words
A mechanism as in claim 1 including a governor mechanism for preventing excessive rate of rotation which is damaging to said fluidic motor.
Claim 5
Dependent Claim
16 words
A mechanism as in claim 3 wherein the governor is operatively connected to the hydraulic motor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |