Transmission and controls therefor

Claim 2

A transmission and control therefor, comprising: input, output and countershafts; multi-range drive means for driving the output shaft from the countershaft and including a first clutch shiftable among neutral, low range, and transport range positions and a second clutch shiftable among neutral, intermediate range and high range positions; a range selector means connected to said first and second clutches and including a first shift lever selectively, sequentially movable among low, intermediate, high and transport range positions for achieving corresponding positions of the first and second clutches; a first two-speed drive means for driving the countershaft from the input shaft and including a third clutch shiftable among neutral, low speed and high speed positions; a two-speed transmission section being connected to the input shaft to drive the latter, the transmission section including a second two-speed drive means for driving the input shaft at low and high speeds and including a control means shiftable between low speed and high speed positions; a speed selector means connected to said third clutch and control means and including a second shift lever selectively, sequentially movable among first, second, third and fourth speed positions for respectively achieving the low speed positions of both the selector means and the third clutch, the high speed position of the selector means and the low speed position of the third clutch, the low speed position of the selector means and the high speed position of the third clutch and the high speed position of the selector means and the high speed position of the third clutch; and the speed ratios of said first and second twospeed drive means being such that the countershaft is driven at increasing speeds as the second lever is shifted from its first to its fourth position.

Claim 3

The transmission and control therefor, as defined in claim 1, wherein the brake means and first and second clutch means each include member means permitting the engagement and disengagement of the brake means and first and second clutch means while the output shaft of the eight-speed transmission is being driven from the countershaft.

Claim 4

The transmission and control therefor, as defined in claim 2, wherein the member means of each of the brake and first clutch means includes hydraulically actuated friction disc elements and the member means of the second clutch means includes a synchronizing element.

Claim 5

A transmission and control therefor, comprising: an eight-speed transmission section including input, output and countershafts; a two-speed planetary transmission section having an output shaft connected to said input shaft and havinG a first low and high speed drive means including a brake means and a first clutch means, each being selectively actuatable between engaged and disengaged conditions, low and high speed driving conditions respectively being established when the brake and clutch means are respectively in their engaged and disengaged conditions, and in their disengaged and engaged conditions; a low and high speed drive means for selectively driving the countershaft from the input shaft and including a second clutch means actuatable among a neutral disengaged condition and first and second engaged conditions wherein the countershaft is respectively connected for being driven at a low and at a high speed from the input shaft; multi-speed drive means for selectively driving the output shaft from the countershaft at four different speeds and including third and fourth clutch means, each being actuatable among a neutral disengaged condition and first and second engaged conditions; the first and second engaged conditions of said third clutch means respectively establishing conditions wherein the output shaft is driven at low and transport speeds from the countershaft and the first and second engaged conditions of said fourth clutch means respectively establishing conditions wherein the output shaft is driven at intermediate and high speeds from the countershaft; a high and low speed selector means for selectively engaging and disengaging the brake means and the first and second clutch means; said selector means including a first shift lever mounted for sequential movement among first, second, third and fourth operative positions for establishing respective conditions wherein the brake, first clutch and second clutch means are respectively in their engaged, disengaged and first engaged conditions, in their disengaged, engaged and first engaged conditions, in their engaged, disengaged and second engaged conditions and in their disengaged, engaged, and second engaged conditions; a range speed selector means for selectively placing the third and fourth clutch means in their respective operating conditions; said speed selector means including a second shift lever mounted for sequential movement among first, second, third and fourth operative positions for establishing respective conditions wherein the third and fourth clutch means are respectively in their first engaged and neutral conditions, in their neutral and first engaged conditions, in their neutral and second engaged conditions and in their second engaged and neutral conditions; the drive ratios of the first and second high and low speed drive means being such that the countershaft is driven at increasing speeds as the first shift lever is sequentially shifted from its first to its second, third and fourth operative positions and the drive ratios of the multi-speed drive means being such that the output shaft is driven at increasing speeds as the second shift lever is sequentially shifted from its first to its second, third and fourth operative positions.

Claim 6

A transmission and control therefor, comprising: an eight-speed transmission section including input, output and countershafts; a two-speed planetary transmission section having an output shaft connected to said input shaft and havinG a first low and high speed drive means including a brake means and a first clutch means, each being selectively actuatable between engaged and disengaged conditions, low and high speed driving conditions respectively being established when the brake and clutch means are respectively in their engaged and disengaged conditions, and in their disengaged and engaged conditions; a low and high speed drive means for selectively driving the countershaft from the input shaft and including a second clutch means actuatable among a neutral disengaged condition and first and second engaged conditions wherein the countershaft is respectively connected for being driven at a low and at a high speed from the input shaft; multi-speed drive means for selectively driving the output shaft from the countershaft at four different speeds and including third and fourth clutch means, each being actuatable among a neutral disengaged condition and first and second engaged conditions; the first and second engaged conditions of said third clutch means respectively establishing conditions wherein the output shaft is driven at low and transport speeds from the countershaft and the first and second engaged conditions of said fourth clutch means respectively establishing conditions wherein the output shaft is driven at intermediate and high speeds from the countershaft; a high and low speed selector means for selectively engaging and disengaging the brake means and the first and second clutch means; said selector means including a first shift lever mounted for sequential movement among first, second, third and fourth operative positions for establishing respective conditions wherein the brake, first clutch and second clutch means are respectively in their engaged, disengaged and first engaged conditions, in their disengaged, engaged and first engaged conditions, in their engaged, disengaged and second engaged conditions and in their disengaged, engaged, and second engaged conditions; a range speed selector means for selectively placing the third and fourth clutch means in their respective operating conditions; said speed selector means including a second shift lever mounted for sequential movement among first, second, third and fourth operative positions for establishing respective conditions wherein the third and fourth clutch means are respectively in their first engaged and neutral conditions, in their neutral and first engaged conditions, in their neutral and second engaged conditions and in their second engaged and neutral conditions; the drive ratios of the first and second high and low speed drive means being such that the countershaft is driven at increasing speeds as the first shift lever is sequentially shifted from its first to its second, third and fourth operative positions and the drive ratios of the multi-speed drive means being such that the output shaft is driven at increasing speeds as the second shift lever is sequentially shifted from its first to its second, third and fourth operative positions.

Claim 7

A transmission and control therefor, comprising: input, output and countershafts; multi-range drive means for driving the output shaft from the countershaft and including a first clutch shiftable among neutral, low range and high range positions and a second clutch shiftable among neutral, intermediate range and high range positions; range selector means connected to said first and second clutches and including a horizontal support shaft; a first arm pivotally mounted on said support shaft for swinging thereabout; a first motion transmitting linkage means connected between said first and second clutches and said first arm; a range shift lever connected to said arm for selectively sequentially swinging the latter together therewith about said support shaft among low, intermediate, high and transport range positions for achieving corresponding positions of the first and second clutches; a first two-speed drive means for driving the countershaft from the input shaft and including a third clutch shiFtable among neutral, low speed and high speed positions; a two-speed transmission section being connected to the input shaft to drive the latter, the transmission section including a second two-speed drive means for driving the input shaft at a low and high speed and including a control means shiftable among low speed and high speed positions; a speed selector means connected to said third clutch and control means and including a second arm mounted on said support shaft for swinging thereabout at a location beside said first arm; a second motion transmitting linkage connected between the second arm and said third clutch; an operating member spaced below said support shaft and pivotally mounted for swinging about an axis extending crosswise to said support shaft and including an upwardly opening notch; a third motion transmitting linkage means connected between said operating member and said control means; a speed shift lever pivotally connected to said second arm for swinging transversely to the direction of and independently of the swinging of said second arm, and for swinging in the direction of swinging of said second arm for causing the movement of the latter; said speed shift lever having a downwardly extending portion received in said notch of the operating member; said speed shift lever being swingable, in the direction of swinging of said second arm, between a first set of low and high speed positions for achieving corresponding positions in said third clutch; and said speed shift lever when in either of said first set of positions being swingable crosswise to the direction of swinging of said second arm between a second set of low and high positions for swinging said operating member and for achieving corresponding positions in said control means.

Claim 8

A transmission and control therefor, comprising: input, output and countershafts; multi-range drive means for driving the output shaft from the countershaft and including a first clutch shiftable among neutral, low range and high range positions and a second clutch shiftable among neutral, intermediate range and high range positions; range selector means connected to said first and second clutches and including a horizontal support shaft; a first arm pivotally mounted on said support shaft for swinging thereabout; a first motion transmitting linkage means connected between said first and second clutches and said first arm; a range shift lever connected to said arm for selectively sequentially swinging the latter together therewith about said support shaft among low, intermediate, high and transport range positions for achieving corresponding positions of the first and second clutches; a first two-speed drive means for driving the countershaft from the input shaft and including a third clutch shiFtable among neutral, low speed and high speed positions; a two-speed transmission section being connected to the input shaft to drive the latter, the transmission section including a second two-speed drive means for driving the input shaft at a low and high speed and including a control means shiftable among low speed and high speed positions; a speed selector means connected to said third clutch and control means and including a second arm mounted on said support shaft for swinging thereabout at a location beside said first arm; a second motion transmitting linkage connected between the second arm and said third clutch; an operating member spaced below said support shaft and pivotally mounted for swinging about an axis extending crosswise to said support shaft and including an upwardly opening notch; a third motion transmitting linkage means connected between said operating member and said control means; a speed shift lever pivotally connected to said second arm for swinging transversely to the direction of and independently of the swinging of said second arm, and for swinging in the direction of swinging of said second arm for causing the movement of the latter; said speed shift lever having a downwardly extending portion received in said notch of the operating member; said speed shift lever being swingable, in the direction of swinging of said second arm, between a first set of low and high speed positions for achieving corresponding positions in said third clutch; and said speed shift lever when in either of said first set of positions being swingable crosswise to the direction of swinging of said second arm between a second set of low and high positions for swinging said operating member and for achieving corresponding positions in said control means.

Claim 9

The transmission and control therefor defined in claim 5 wherein said speed shift lever is movable between the high speed position of the first set of low and high speed positions and the low speed position of the second set of low and high speed positions whereby the third clutch and the control means are simultaneously actuated.

Claim 10

The transmission and control therefor as defined in claim 5 and further including a reverse drive means for selectively driving said output shaft from the input shaft, when the first clutch is in the low range position, and from the countershaft, when the second clutch is in the intermediate range and fast range positions; said reverse drive means including a reverse clutch shiftable between a neutral and a reverse position; said speed shift lever also being swingable to neutral and reverse positions for respectively achieving corresponding positions of said third clutch and said reverse clutch; said range shift lever also being swingable to a park position for simultaneously achieving the engaged positions of said first and second clutches; and interlock means including first means responsive to the positioning of said range and speed shift levers for preventing said range shift lever from being shifted to the transport range position when the speed shift lever is in the reverse position and vice versa.

Claim 11

The transmission and control therefor defined in claim 7 wherein said interlock means includes second means responsive to the positioning of said range and speed shift levers for preventing said range shift lever from being moved to the park position unless the speed shift lever is in the neutral position.