US4238966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt drive for pump jack
Assignee: Individual
•
Filing: 1978-01-05
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Granted: 1980-12-16
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Expires: 1998-01-05
Abstract
Abstract The pump drive mechanism provides a high reduction drive from a continuous operating motor to a crank arm to oscillate the counterbalanced jack for a pump as used in the oil field. The drive utilizes three series of belts to obtain a reduction of 190 to 1. The belt drive reduces downtime and improves the efficiency of drives for pump jacks.
Inventors
- 👤 Russell R. Carlson
- 👤 John J. Tschetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:52
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; F04B47/022; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18176; Y10T74/18182
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
238 words
A pump operating mechanism for a pump jack which comprises: a walking beam having counterweights on said beam including a head, a fram pivotally supporting said walking beam for oscillating movement of a head about said supporting frame and, a drive mechanism for driving said walking beam to oscillate the same, said drive mechanism comprising: a drive motor having a drive sheave, a first driven shaft having a driven sheave and a smaller drive sheave, a second driven shaft having a driven sheave and a smaller drive sheave, a third driven shaft having a driven sheave and having a radial crank arm secured thereto, said driven sheaves being of equal diameter, three series of drive belts connecting said drive sheaves to a driven sheave to drive the first shaft from said motor driven sheave, to drive the second shaft from the drive sheave on the first shaft and to drive the third shaft from the drive sheave on the second shaft, and a drive link connecting said crank arms, to said walking beam for pivoting the same about said supporting frame upon operation of said motor, wherein said drive reduction is approximately 109 to 1, wherein said drive reduction is afforded by a drive sheave 4 inches in diameter driven from said drive motor, said second and third drive sheaves being approximately 5 and 7 inches in diameter respectively, and said driven sheaves being 25 inches in diameter.
Claim 2
Dependent Claim
238 words
A pump operating mechanism for a pump jack which comprises: a walking beam having counterweights on said beam including a head, a fram pivotally supporting said walking beam for oscillating movement of a head about said supporting frame and, a drive mechanism for driving said walking beam to oscillate the same, said drive mechanism comprising: a drive motor having a drive sheave, a first driven shaft having a driven sheave and a smaller drive sheave, a second driven shaft having a driven sheave and a smaller drive sheave, a third driven shaft having a driven sheave and having a radial crank arm secured thereto, said driven sheaves being of equal diameter, three series of drive belts connecting said drive sheaves to a driven sheave to drive the first shaft from said motor driven sheave, to drive the second shaft from the drive sheave on the first shaft and to drive the third shaft from the drive sheave on the second shaft, and a drive link connecting said crank arms, to said walking beam for pivoting the same about said supporting frame upon operation of said motor, wherein said drive reduction is approximately 109 to 1, wherein said drive reduction is afforded by a drive sheave 4 inches in diameter driven from said drive motor, said second and third drive sheaves being approximately 5 and 7 inches in diameter respectively, and said driven sheaves being 25 inches in diameter.
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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |