US3918208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling device
Assignee: Individual
•
Filing: 1974-04-26
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Granted: 1975-11-11
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Expires: 1994-04-26
Abstract
Abstract A coupling device which may be used to connect tractors or other vehicles to farm implements, trailers, or the like, has a shaft with a head at one end and is threaded adjacent its other end. A washer is carried by the shaft, the head and the washer being on opposite sides of the tongue or other connecting means. A spring is carried by the shaft between the washer and a threaded fastener which fits onto the shaft. A locking pin is provided to secure the fastener in desired positions.
Inventors
- 👤 Willis A Fairchild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:51
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/01; B60D1/02; B60D1/025; F; F16; F16B; F16B39/00; F16B39/02; F16B39/08; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/945
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
267 words
A device for coupling connecting means comprising a pin having a shaft with a head at its lower end and a threaded portion adjacent its upper end, a washer slidably carried by said shaft between said head and said upper end, said shaft being adapted to fit through aligned openings in the connecting means with said head in contact with the lower face and said washer in contact with the upper face of the connecting means, a nut threadably engageable with said threaded portion of said shaft and being removable therefrom, a coil spring slidably carried by said shaft between said washer and said nut with one end of said spring abutting said washer and the other end thereof abutting said nut, and a locking pin pivotably connected with the threaded portion of said shaft adjacent to its upper end, said locking pin having a first dimension which is greater than the maximum diameter of said threaded portion and a second dimension which is less than said diameter, said locking pin being pivotally mounted substantially midway between said two dimensions, said locking pin being pivotal between a first position wherein said greater dimension is axially aligned with the axis of said shaft and a second position wherein said greater dimension is perpendicular to said axis, said locking pin and said nut being adapted to be inter-engageable to secure said nut in desired positions, said nut having inner walls forming an open space in its upper portion to receive said locking pin therein in contact with said inner walls when said locking pin is in said second position.
Claim 2
Independent Claim
267 words
A device for coupling connecting means comprising a pin having a shaft with a head at its lower end and a threaded portion adjacent its upper end, a washer slidably carried by said shaft between said head and said upper end, said shaft being adapted to fit through aligned openings in the connecting means with said head in contact with the lower face and said washer in contact with the upper face of the connecting means, a nut threadably engageable with said threaded portion of said shaft and being removable therefrom, a coil spring slidably carried by said shaft between said washer and said nut with one end of said spring abutting said washer and the other end thereof abutting said nut, and a locking pin pivotably connected with the threaded portion of said shaft adjacent to its upper end, said locking pin having a first dimension which is greater than the maximum diameter of said threaded portion and a second dimension which is less than said diameter, said locking pin being pivotally mounted substantially midway between said two dimensions, said locking pin being pivotal between a first position wherein said greater dimension is axially aligned with the axis of said shaft and a second position wherein said greater dimension is perpendicular to said axis, said locking pin and said nut being adapted to be inter-engageable to secure said nut in desired positions, said nut having inner walls forming an open space in its upper portion to receive said locking pin therein in contact with said inner walls when said locking pin is in said second position.
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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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |