US3734224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load handling vehicles
Assignee: Individual
•
Filing: 1971-03-19
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Granted: 1973-05-22
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Expires: 1991-03-19
Abstract
Abstract In a vehicle, primarily a load handling vehicle such as a fork lift truck, having a prime mover and ground-engaging wheels driven through a variable ration hydraulic transmission, a transmission ratio control is linked with a power output control of the prime mover to provide automatically an increase of the power output of the prime mover when the transmission ratio is varied to accelerate the vehicle. The transmission ratio control is operatively connected with a foot-operated rocker and the latter is linked with the power output control in a manner which provides an adjustable degree of lost motion so that the transmission ratio control is actuated before the power output control.
Inventors
- 👤 J Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:32
CPC Classifications
B; B60; B60K; B60K7/00; B60K7/0015; B60K17/00; B60K17/04; B60K17/10; B60K2007/0038; B60K2007/0061; B60K5/00; B60L; B60L2220/00; B60L2220/40; B60L2220/46; B60Y; B60Y2200/00; B60Y2200/10; B60Y2200/15
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
341 words
In a vehicle having: a. a prime mover, b. a plurality of ground-engaging wheels, at least one of which is a driving wheel, c. a variable ratio hydraulic transmission means for transmitting drive from the prime mover to the driving wheel, and d. transmission control means for varying the transmission ratio, the improvement therein comprising: e. power output control means for varying the power output of the prime mover, f. the transmission control means is arranged for controlling the direction of rotation of the driving wheel, g. the transmission control means is movable from a datum position in either of two different directions corresponding respectively to forward and reverse rotation of the driving wheel, h. a linkage operatively connected between the power output cOntrol means and the transmission control means, whereby the power output of the prime mover is automatically varied when the transmission control means is operated to vary the transmission ratio, i. said linkage is arranged for operating the power output control means in such a manner as to increase the power output of the prime mover in response to movement of the transmission control means in either direction from the datum position. j. said linkage including: 1. a rocker mounted for movement about a rocking axis in either direction from a datum position and connected with the transmission control means for movement coordinated with that of the latter, and 2. a lever mounted for movement about a lever axis transverse of the rocking axis, and connected with the power output control means, k. the rocker presents abutment surfaces at positions off-set from said rocker axis on opposite sides thereof facing in substantially the same direction transverse of both the rocker axis and the lever axis for engagement with said lever at respective contact positions on the lever, and l. said contact positions on the lever are off-set from the lever axis on the same side thereof whereby movement of the rocker in either direction from the datum position increases the power output of the prime mover when operating.
Claim 2
Dependent Claim
341 words
In a vehicle having: a. a prime mover, b. a plurality of ground-engaging wheels, at least one of which is a driving wheel, c. a variable ratio hydraulic transmission means for transmitting drive from the prime mover to the driving wheel, and d. transmission control means for varying the transmission ratio, the improvement therein comprising: e. power output control means for varying the power output of the prime mover, f. the transmission control means is arranged for controlling the direction of rotation of the driving wheel, g. the transmission control means is movable from a datum position in either of two different directions corresponding respectively to forward and reverse rotation of the driving wheel, h. a linkage operatively connected between the power output cOntrol means and the transmission control means, whereby the power output of the prime mover is automatically varied when the transmission control means is operated to vary the transmission ratio, i. said linkage is arranged for operating the power output control means in such a manner as to increase the power output of the prime mover in response to movement of the transmission control means in either direction from the datum position. j. said linkage including: 1. a rocker mounted for movement about a rocking axis in either direction from a datum position and connected with the transmission control means for movement coordinated with that of the latter, and 2. a lever mounted for movement about a lever axis transverse of the rocking axis, and connected with the power output control means, k. the rocker presents abutment surfaces at positions off-set from said rocker axis on opposite sides thereof facing in substantially the same direction transverse of both the rocker axis and the lever axis for engagement with said lever at respective contact positions on the lever, and l. said contact positions on the lever are off-set from the lever axis on the same side thereof whereby movement of the rocker in either direction from the datum position increases the power output of the prime mover when operating.
Claim 3
Dependent Claim
108 words
a lever mounted for movement about a lever axis transverse of the rocking axis, and connected with the power output control means, h. the rocker presents abutment surfaces at positions off-set from said rocker axis on opposite sides thereof facing in substantially the saMe direction transverse of both the rocker axis and the lever axis for engagement with said lever at respective contact positions on the lever, and i. said contact positions on the lever are off-set from the lever axis on the same side thereof whereby movement of the rocker in either direction from the datum position increases the power output of the prime mover when operating.
Claim 4
Dependent Claim
108 words
a lever mounted for movement about a lever axis transverse of the rocking axis, and connected with the power output control means, h. the rocker presents abutment surfaces at positions off-set from said rocker axis on opposite sides thereof facing in substantially the saMe direction transverse of both the rocker axis and the lever axis for engagement with said lever at respective contact positions on the lever, and i. said contact positions on the lever are off-set from the lever axis on the same side thereof whereby movement of the rocker in either direction from the datum position increases the power output of the prime mover when operating.
Claim 5
Dependent Claim
108 words
a lever mounted for movement about a lever axis transverse of the rocking axis, and connected with the power output control means, k. the rocker presents abutment surfaces at positions off-set from said rocker axis on opposite sides thereof facing in substantially the same direction transverse of both the rocker axis and the lever axis for engagement with said lever at respective contact positions on the lever, and l. said contact positions on the lever are off-set from the lever axis on the same side thereof whereby movement of the rocker in either direction from the datum position increases the power output of the prime mover when operating.
Claim 6
Dependent Claim
108 words
a lever mounted for movement about a lever axis transverse of the rocking axis, and connected with the power output control means, k. the rocker presents abutment surfaces at positions off-set from said rocker axis on opposite sides thereof facing in substantially the same direction transverse of both the rocker axis and the lever axis for engagement with said lever at respective contact positions on the lever, and l. said contact positions on the lever are off-set from the lever axis on the same side thereof whereby movement of the rocker in either direction from the datum position increases the power output of the prime mover when operating.
Claim 7
Dependent Claim
58 words
The improvement according to claim 1 wherein said linkage includes lost motion means interposed operatively between the rocker and the power output control means, whereby when the rocker is moved from the datum position, the transmission control means is operated to vary the transmission ratio before the power output control means is operated to increase the power output.
Claim 8
Dependent Claim
41 words
The improvement according to claim 2 wherein said lost motion means includes adjustment means on one of the lever and the rocker for adjusting a clearance gap between said abutment surfaces of the rocker and said lever at the contact positions.
Claim 9
Dependent Claim
38 words
The improvement according to claim 3 wherein the adjustment means is arranged for providing individual adjustment of the clearance gap at one of said abutment surfaces relative to the clearance gap at the other of said abutment surfaces.
Claim 10
Dependent Claim
30 words
The improvement according to claim 1 wherein foot pedal means is mounted on said rocker, the foot pedal means including tread portions disposed on opposite sides of the rocker axis.
Claim 11
Dependent Claim
58 words
The improvement according to claim 1 further comprising: a. an arm mounted on the rocker and extending radially of the rocker axis, and b. a connecting member, one end of which is pivotally connected with said arm at a position remote from the rocker axis, and the other end of which is connected with said transmission control means.
Claim 12
Dependent Claim
114 words
In a vehicle having: a. a prime mover, b. a plurality of ground-engaging wheels, at least one of which is a driving wheel, c. a variable ratio hydraulic transmission means for transmitting drive from the prime mover to the driving wheel, and d. transmission control means for varying the transmission ratio, the improvement wherein there is provided: e. power output control means for varying the power output of the prime mover, f. a linkage operatively connected between the power output control means and the transmission control means, whereby the power output of the prime mover is automatically varied when the transmission control means is operated to vary the transmission ratio, g. said linkage including:
Claim 13
Dependent Claim
114 words
In a vehicle having: a. a prime mover, b. a plurality of ground-engaging wheels, at least one of which is a driving wheel, c. a variable ratio hydraulic transmission means for transmitting drive from the prime mover to the driving wheel, and d. transmission control means for varying the transmission ratio, the improvement wherein there is provided: e. power output control means for varying the power output of the prime mover, f. a linkage operatively connected between the power output control means and the transmission control means, whereby the power output of the prime mover is automatically varied when the transmission control means is operated to vary the transmission ratio, g. said linkage including:
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |