Patent US4433854A successfully refreshed from Google Patents.
US4433854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interchangeable ball hitch
Assignee: INNOVATIVE RESEARCH Corp A CORP OF Co
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Filing: 1981-10-19
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Granted: 1984-02-28
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Expires: 2001-10-19
Abstract
Abstract The interchangeable ball hitch connector apparatus of this invention includes a generally spherical ball connector adapted to engage a conventional ball hitch socket, a support base adapted for fastening on the tow bar of a vehicle for supporting the ball connector, and a spring-biased latch pin in the support base for releasably attaching the ball connector to the support base. When the ball connector is assembled with and attached to the support base, the latch pin is contained entirely inside the ball connector and not exposed to damage from the socket or parts thereof on the exterior of the ball connector. A channel in the ball connector allows the latch pin to be readily unlatched from the ball connector by use of an elongated utensil, such as an ignition key.
Inventors
- 👤 Jerry R. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:25
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/01; B60D1/07; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32631; Y10T403/32681; Y10T403/32704; Y10T403/60; Y10T403/602; Y10T403/604
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
81 words
Ball hitch apparatus, comprising: a support base having a stub shaft extending upwardly therefrom; a latch pin in said stub shaft adapted to protrude radially outwardly therefrom; and a generally spherical body with a bore extending radially inward from its bottom peripheral surface, and a cavity recessed therein from the periphery of said radial bore and adapted to receive therein said latch pin when the stub shaft of said support base is inserted into said radial bore in said spherical body.
Claim 2
Dependent Claim
81 words
Ball hitch apparatus, comprising: a support base having a stub shaft extending upwardly therefrom; a latch pin in said stub shaft adapted to protrude radially outwardly therefrom; and a generally spherical body with a bore extending radially inward from its bottom peripheral surface, and a cavity recessed therein from the periphery of said radial bore and adapted to receive therein said latch pin when the stub shaft of said support base is inserted into said radial bore in said spherical body.
Claim 3
Dependent Claim
45 words
The ball hitch apparatus of claim 1, wherein said stub shaft includes a transverse bore extending radially therein and said latch pin is positioned slidably in said transverse bore and biased to protrude outwardly from said transverse bore into said cavity in said spherical body.
Claim 4
Dependent Claim
29 words
The ball hitch apparatus of claim 2, wherein said cavity is an annular groove in said spherical body around the periphery of said radial bore in said spherical body.
Claim 5
Dependent Claim
71 words
The ball hitch apparatus of claim 2, including a slotted access opening extending transversely from the exterior of said spherical body to said cavity and positioned to be in alignment with said latch pin when said latch pin is positioned in said cavity in such a manner that an elongated object can be inserted through said slotted access opening to depress said latch pin into said transverse bore in said shaft.
Claim 6
Dependent Claim
45 words
The ball hitch apparatus of claim 3, including a slotted access opening extending transversely from the exterior of said spherical body to said annular groove and adapted for receiving therein an elongated object for depressing said latch pin into said transverse bore in said shaft.
Claim 7
Dependent Claim
27 words
The ball hitch apparatus of claim 5, wherein said shaft has a longitudinal axis and said spherical body is rotatable about the longitudinal axis of said shaft.
Claim 8
Dependent Claim
53 words
The ball hitch apparatus of claim 6, including an external marker on said base support means in alignment with said latch pin and visible when said spherical body is positioned on said stub shaft for indicating a position where said slotted access opening in said spherical body is aligned with said latch pin.
Claim 9
Dependent Claim
27 words
The ball hitch apparatus of claim 5, wherein the external entrance to said slotted access opening is recessed inwardly from the peripheral surface of said spherical body.
Claim 10
Dependent Claim
29 words
The ball hitch apparatus of claim 3, wherein said base support means includes fastening means adapted for affixing said base support means to a tow bar of a vehicle.
Claim 11
Dependent Claim
41 words
The ball hitch apparatus of claim 9, wherein said fastening means includes an internally threaded bore in said base support means adapted for receiving an externally threaded bolt of sufficient length to also pass through a hole in a tow bar.
Claim 12
Dependent Claim
32 words
The ball hitch of claim 10, wherein said fastening means includes an externally threaded shank extending downwardly from said base support means adapted to pass through a hole in a tow bar.
Claim 13
Dependent Claim
30 words
The ball hitch apparatus of claim 1, wherein said shaft is adapted to receive a spherical body of a different diameter for an alternate selective mounting on the support base.
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) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |