US3768088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer stand leg position indicator
Assignee: Individual
•
Filing: 1971-11-05
•
Granted: 1973-10-23
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Expires: 1991-11-05
Abstract
Abstract A signalling arrangement for warning when the stand leg of a trailer, that is connected to a tractor, is not raised off the ground. The signalling arrangement includes a warning light and a buzzer mounted on the instrument panel of the tractor, a switch actuator located in the trailer in such a position as to be shifted when the stand leg is raised from the ground, and an electric circuit so connecting in series the battery in the tractor, the warning light and buzzer and the switch actuator that the switch actuator is moved from a position where it causes the warning light and buzzer to be turned on when the stand leg is engaging the ground to a position where it causes the warning light and buzzer to be turned off in response to the raising of the stand leg from the ground.
Inventors
- 👤 G Risius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:11
CPC Classifications
B; B60; B60S; B60S9/00; B60S9/02; B60S9/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
374 words
In a truck assembly comprising a tractor; a trailer; separable connecting means for connecting the tractor and the trailer; and at least one stand leg mounted to the trailer for heightwise movement between an upper and a lower position, said stand leg supporting the trailer when the stand leg is in its lower position and the tractor and the trailer are disconnected; a signalling arrangement for warning that the stand leg is in a lowered position when the tractor and the trailer are connected by the connecting means comprising: signalling means located in the tractor for indicating when the stand leg is not in an upper fully retracted position; actuating means for the signalling means located on the trailer comprising a switch having an actuator movable between a first actuator position and a second actuator position; separable circuit means for joining the actuating means and the signalling means when the tractor and the trailer are connected; and operating means so constructed as to cause the signalling means to be turned on when the switch actuator is in said first actuator position and to cause the signalling means to be turned off when the switch actuator is in said second actuator position, effective when the circuit means is joining the actuating means and the signalling means, so constructed and arranged as to cause the actuating means to turn on the signalling means when the stand leg is in any position other than its upper fully retracted position, wherein said operating means comprises: an operating bar, in registry with said switch actuator, mounted for movement between a first operating bar position wherein it is disengaged from the switch actuator so that the switch actuator may be in said first actuator position and a second operating bar position wherein it is in engagement with the switch actuator so that the switch actuator is moved to said second actuator position; and moving means, interposed between the stand leg and the operating bar, so constructed and arranged as to maintain the operating bar in said first operating bar position when the stand leg is in said lower position and to place the operating bar in said second operating bar position when the stand leg is in said upper position.
Claim 2
Dependent Claim
374 words
In a truck assembly comprising a tractor; a trailer; separable connecting means for connecting the tractor and the trailer; and at least one stand leg mounted to the trailer for heightwise movement between an upper and a lower position, said stand leg supporting the trailer when the stand leg is in its lower position and the tractor and the trailer are disconnected; a signalling arrangement for warning that the stand leg is in a lowered position when the tractor and the trailer are connected by the connecting means comprising: signalling means located in the tractor for indicating when the stand leg is not in an upper fully retracted position; actuating means for the signalling means located on the trailer comprising a switch having an actuator movable between a first actuator position and a second actuator position; separable circuit means for joining the actuating means and the signalling means when the tractor and the trailer are connected; and operating means so constructed as to cause the signalling means to be turned on when the switch actuator is in said first actuator position and to cause the signalling means to be turned off when the switch actuator is in said second actuator position, effective when the circuit means is joining the actuating means and the signalling means, so constructed and arranged as to cause the actuating means to turn on the signalling means when the stand leg is in any position other than its upper fully retracted position, wherein said operating means comprises: an operating bar, in registry with said switch actuator, mounted for movement between a first operating bar position wherein it is disengaged from the switch actuator so that the switch actuator may be in said first actuator position and a second operating bar position wherein it is in engagement with the switch actuator so that the switch actuator is moved to said second actuator position; and moving means, interposed between the stand leg and the operating bar, so constructed and arranged as to maintain the operating bar in said first operating bar position when the stand leg is in said lower position and to place the operating bar in said second operating bar position when the stand leg is in said upper position.
Claim 3
Dependent Claim
174 words
The signalling arrangement of claim 1 wherein said moving means comprises: an activating rod mounted for heightwise movement between a lower activating rod position and an upper activating rod position; means so mounting the operating bar to the activating rod that the operating bar is in said first operating bar position when the activating rod is in said lower activating rod position and that the operating bar is in said second operating bar position when the activating rod is in said upper activating rod position; an abutment on the activating rod below the operating bar; an operating rod secured to the stand leg and mounted for heightwise movement in unison therewith; and a collar secured to the operating rod so located as to be below and in intersecting relationship with respect to the abutment; whereby the movement of the stand leg from its lower position to its upper position raises the operating rod and causes the collar to engage the abutment and move the activating rod from its lower position to its upper position.
Claim 4
Dependent Claim
24 words
The signalling arrangement of claim 1 wherein said tractor includes an instrument panel and wherein said sigNalling means is mounted to said instrument panel.
Claim 5
Dependent Claim
17 words
The signalling arrangement of claim 3 wherein said signalling means comprises a warning light and a buzzer.
Claim 6
Dependent Claim
65 words
The signalling arrangement of claim 1 wherein said separable circuit means comprises: a terminal block mounted to the trailer; a cable extending from the tractor and removably connected to the terminal block; a source of power in the tractor; and an electrical circuit extending through the terminal block and the cable joining the source of power, the signalling means and the actuating means in series.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |