Patent US2887912A successfully refreshed from Google Patents.
Patent US4291893A successfully refreshed from Google Patents.
US4291893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling guard
Assignee: CAMPBELL NORMA JEAN
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Filing: 1980-01-25
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Granted: 1981-09-29
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Expires: 2000-01-25
Abstract
Abstract A base is secured to a mounting member extending from a towing vehicle and having an upstanding ball element. A retention member carried by the base is selectively movable to a position over a socket element which extends from a towed vehicle and which is detachably engaged downwardly over the ball element. The retention member limits the upward travel of the socket element and maintains engagement of the coupling. The retention member is held in position by lock means. A resilient member is disposed between the base and the retention member to prevent the retention member from rattling against the base.
Inventors
- 👤 Robert N. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:02
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/24; B60D1/28; B60D1/58; B60D1/60; B60D1/583
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
219 words
A guard for use in combination with a coupling for detachably securing a towed vehicle to a towing vehicle, said coupling including, an upstanding ball element having a depending attachment shank received through a bore in a mounting member extending rearwardly from said towing vehicle, and an inverted socket element carried at the free end of a tongue extending forwardly from said towed vehicle, said socket element being detachably engaged downwardly over said ball element, and for selectively limiting the upward movement of said socket element relative said ball element, said guard comprising: a. a base securable to said mounting member and including, i. a first section upstanding from said mounting member, and ii. a second section extending from said first section over said ball element and spaced from said ball element to receive said socket element therebetween; and b. retention means including i. an aperture extending through said second section and having camming means therein; and ii. a shaft extending through said aperture and having an upper end and a lower end and having complementary camming means operatively engaged with said camming means thereby rotation of said shaft in one direction extends the lower end thereof toward said ball element and rotation of said shaft in a counter direction retracts the lower end thereof from said ball element.
Claim 2
Dependent Claim
219 words
A guard for use in combination with a coupling for detachably securing a towed vehicle to a towing vehicle, said coupling including, an upstanding ball element having a depending attachment shank received through a bore in a mounting member extending rearwardly from said towing vehicle, and an inverted socket element carried at the free end of a tongue extending forwardly from said towed vehicle, said socket element being detachably engaged downwardly over said ball element, and for selectively limiting the upward movement of said socket element relative said ball element, said guard comprising: a. a base securable to said mounting member and including, i. a first section upstanding from said mounting member, and ii. a second section extending from said first section over said ball element and spaced from said ball element to receive said socket element therebetween; and b. retention means including i. an aperture extending through said second section and having camming means therein; and ii. a shaft extending through said aperture and having an upper end and a lower end and having complementary camming means operatively engaged with said camming means thereby rotation of said shaft in one direction extends the lower end thereof toward said ball element and rotation of said shaft in a counter direction retracts the lower end thereof from said ball element.
Claim 3
Dependent Claim
16 words
The guard of claim 1, further including locking means for selectively retarding rotation of said shaft.
Claim 4
Dependent Claim
36 words
The guard of claim 2, wherein said locking means includes a collar encircling said shaft and having camming means operatively engaged with the complementary camming means of said shaft and frictionally engageable with said second section.
Claim 5
Dependent Claim
52 words
The guard of claim 2, wherein said locking means includes an elongate handle element having a first end and a second end, said first end pivotally connected to the upper end of said shaft for rotation about an axis generally perpendicular to said shaft and second end engageable with said second section.
Claim 6
Dependent Claim
26 words
The guard of claim 1, further including a foot carried at the lower end of said shaft and having an undersurface for abutting said socket element.
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) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |