Patent US4176853A successfully refreshed from Google Patents.
US4176853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick disconnect trailer hitch
Assignee: Individual
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Filing: 1978-07-21
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Granted: 1979-12-04
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Expires: 1998-07-21
Abstract
Abstract A quick disconnect trailer hitch for connecting a trailer vehicle to a tractor vehicle wherein a pair of pivotally connected jaws are slidably mounted in a vertically disposed tube connected to the trailer vehicle draw bar. A spring is mounted in the tube for biasing the outer ends of the jaws outwardly therefrom to an open position, the jaws being slidable inwardly of the tube to a closed position wherein the outer ends of the jaws surround a ball hitching element connected to the tractor vehicle, the spring biased jaws being latched in the closed position.
Inventors
- 👤 James H. Brock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:19
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/0807; B62D53/0828; B60; B60D; B60D1/00; B60D1/01; B60D1/06; B60D1/065; Y; Y10; Y10S; Y10S280/00; Y10S280/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
A trailer hitch comprising, a tubular member connected to a trailer, a pair of jaws, said jaws having complementary concave surfaces adapted to surround a ball hitching element connected to a tractor vehicle, said jaws being slidably mounted in said tubular member, spring means mounted in said tubular housing for biasing the jaws outwardly of the tubular member to a position wherein the jaws are moved to an open position, a pin oriented between the jaws for guiding said jaws during movement relative to said tubular member, and latch means connected to said tubular member for holding the jaws inwardly of the tubular member against the biasing force of said spring means.
Claim 2
Dependent Claim
112 words
A trailer hitch comprising, a tubular member connected to a trailer, a pair of jaws, said jaws having complementary concave surfaces adapted to surround a ball hitching element connected to a tractor vehicle, said jaws being slidably mounted in said tubular member, spring means mounted in said tubular housing for biasing the jaws outwardly of the tubular member to a position wherein the jaws are moved to an open position, a pin oriented between the jaws for guiding said jaws during movement relative to said tubular member, and latch means connected to said tubular member for holding the jaws inwardly of the tubular member against the biasing force of said spring means.
Claim 3
Dependent Claim
31 words
A trailer hitch according to claim 1, wherein the tubular member comprises a depending tubular portion of a goose neck type draw bar having one end rigidly connected to a trailer.
Claim 4
Dependent Claim
39 words
A trailer hitch according to claim 1, wherein the spring means comprises a coil spring having one end abutting the inner ends of the jaws, the other end of the spring engaging abutment means mounted in said tubular member.
Claim 5
Dependent Claim
67 words
A trailer hitch according to claim 3, wherein the abutment means comprises a rod positioned coaxially within said tubular member, a piston connected to one end of said rod, said piston being rigidly connected to the inner wall of said tubular member, a collar rigidly connected to said rod, said coil spring being mounted coaxially on said rod, said other end of the spring engaging said collar.
Claim 6
Dependent Claim
106 words
A trailer hitch according to claim 1, wherein the latch means comprises a housing secured to the outer wall surface of said tubular member, a rod slidably mounted in said housing, a keeper connected to one end of said rod, cut-out portions formed in said jaws for receiving said keeper, spring means mounted in said housing for biasing said keeper into said jaws, and a cam lever pivotally connected to the other end of said rod, whereby when the lever is pivoted to a position to pull the keeper out of the jaws, the jaws are moved outwardly of the tubular member to an open position.
Claim 7
Dependent Claim
34 words
A trailer hitch according to claim 1, wherein stop means are mounted on the end of the tubular member to limit the outward and inward movement of the jaws relative to the tubular member.
Claim 8
Dependent Claim
41 words
A trailer hitch according to claim 6, wherein the stop means comprises a pair of chordal plates connected to the end portion of the tubular member, each end of each jaw being provided with a flange portion engageable with said plates.
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) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |