Patent US2616628A successfully refreshed from Google Patents.
Patent US4201400A successfully refreshed from Google Patents.
US4201400A
Expired / Lapsed
US
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Towing device
Assignee: J&A Atlas Nominees Pty Ltd
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Filing: 1978-07-14
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Granted: 1980-05-06
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Expires: 1998-07-14
Abstract
Abstract The present invention provides a towing device comprising a towball and latching means releaseably operable to, in use, secure the towball to the draw bar of a vehicle.
Inventors
- 👤 Thomas C. Hoogenbosch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:45
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/48; B60D1/52; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32631; Y10T403/32681; Y10T403/32704
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
204 words
A towing device removably securable to a vehicular drawbar comprising: a sleeve adapted for mounting in a hole in the drawbar, said sleeve having an annular groove on the inner surface thereof; a tow ball element having a tow ball, a shank receivable in said sleeve, and a flange abuttable with the end of said sleeve when said shank is received in said sleeve for locating said shank with respect to said sleeve, said shank having opposed transverse bores aligned with the annular groove of said sleeve when said shank is located in said sleeve, said element having a central longitudinal bore; a ball located in each of said transverse bores; an actuator located in said longitudinal bore and movable therealong, said actuator having an enlarged portion for inserting said balls in said annular groove when said actuator is positioned in a preselected position; and bias means secured in the portion of said longitudinal bore received in said sleeve and having means engaging said actuator for biasing said actuator into said preselected position, said longitudinal bore being formed to provide stop means coacting with said enlarged portion of said actuator for retaining said actuator in said preselected position when biased by said bias means.
Claim 2
Dependent Claim
204 words
A towing device removably securable to a vehicular drawbar comprising: a sleeve adapted for mounting in a hole in the drawbar, said sleeve having an annular groove on the inner surface thereof; a tow ball element having a tow ball, a shank receivable in said sleeve, and a flange abuttable with the end of said sleeve when said shank is received in said sleeve for locating said shank with respect to said sleeve, said shank having opposed transverse bores aligned with the annular groove of said sleeve when said shank is located in said sleeve, said element having a central longitudinal bore; a ball located in each of said transverse bores; an actuator located in said longitudinal bore and movable therealong, said actuator having an enlarged portion for inserting said balls in said annular groove when said actuator is positioned in a preselected position; and bias means secured in the portion of said longitudinal bore received in said sleeve and having means engaging said actuator for biasing said actuator into said preselected position, said longitudinal bore being formed to provide stop means coacting with said enlarged portion of said actuator for retaining said actuator in said preselected position when biased by said bias means.
Claim 3
Dependent Claim
33 words
The towing device according to claim 1 wherein the size of said enlarged portion is in excess of the size of the adjacent portion of said longitudinal bore to form said stop means.
Claim 4
Dependent Claim
41 words
The towing device according to claim 1 wherein said actuator extends through said tow ball and has an exposed end by which said actuator may be manipulated to move same out of said preselected position in opposition to said bias means.
Claim 5
Dependent Claim
23 words
The towing device according to claim 3 wherein said exposed end of said actuator is located in a recess in said tow ball.
Claim 6
Dependent Claim
28 words
The towing device according to claim 1 wherein said sleeve and shank are formed to restrict the shank against rotation when said shank is received in said sleeve.
Claim 7
Dependent Claim
30 words
The towing device according to claim 1 wherein said portion of said longitudinal bore received in said sleeve is threaded and said bias means is threadably secured in said bore.
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) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |