Load carriage with operator{3 s platform

Claim 2

In a vehicle of the class described, a main frame including a vertical mast, an elevating load carriage, means mounting said load carriage for vertical movement along said mast, means for moving said carriage vertically on said mounting means relatively to said main frame, an operator''s platform, means mounting said platform for vertical movement on said carriage and also for movement with said carriage, a lost motion connection between said platform and carriage whereby said carriage may move freely upwardly of said platform in a vertical direction for a predetermined distance and then moves said platform vertically upwardly therewith, said lost motion connection including a hydraulic cylinder and piston located between said carriage and platform for permitting movement of said carriage relatively to said platform to move said piston in opposed directions into and out of said cylinder when the hydraulic fluid is allowed to flow freely into and from said piston and cylinder, and control means for inhibiting said flow of fluid whereupon said carriage and platform may be locked for integral movement.

Claim 3

In the combination of claim 1, the feature that said control means also directs fluid under pressure into said cylinder whereby to move said platform relatively to said carriage.

Claim 4

In a vehicle of the class described, a main frame including a vertical mast, an elevatinG load carriage, means mounting said load carriage for vertical movement along said mast, means for moving said carriage vertically on said mounting means relatively to said main frame, an operator''s platform, means mounting said platform for vertical movement on said carriage and also for movement with said carriage, a lost motion connection between said platform and carriage whereby said carriage may move freely upwardly of said platform in a vertical direction for a predetermined distance and then moves said platform vertically upwardly therewith, and a hydraulic ram between said carriage and platform for controlling the position of said platform relatively to said carriage independently of said lost motion means of connection.

Claim 5

In a vehicle of the class described, a main frame including a vertical mast, an elevatinG load carriage, means mounting said load carriage for vertical movement along said mast, means for moving said carriage vertically on said mounting means relatively to said main frame, an operator''s platform, means mounting said platform for vertical movement on said carriage and also for movement with said carriage, a lost motion connection between said platform and carriage whereby said carriage may move freely upwardly of said platform in a vertical direction for a predetermined distance and then moves said platform vertically upwardly therewith, and a hydraulic ram between said carriage and platform for controlling the position of said platform relatively to said carriage independently of said lost motion means of connection.

Claim 6

In a vehicle of the class described, a main frame including a vertical mast, an elevating load carriage, means mounting said load carriage for vertical movement along said mast, means for moving said carriage vertically on said mounting means relatively to said main frame, an operator''s platform, means mounting said platform for vertical movement on said carriage and also for movement with said carriage, a lost motion connection between said platform and carriage whereby said carriage may move freely upwardly of said platform in a vertical direction for a predetermined distance and then moves said platform vertically upwardly therewith, said lost motion connection comprising abutment means on said carriage adapted to engage abutment means on said platform during upward movement of said carriage, said abutment means on said carriage dropping from contact with the abutment means on said platform to permit said carriage to move downwardly relatively to said platform when said platform reaches a predetermined position with respect to said main frame during downward travel of the carriage and platform, and a hydraulic ram between said carriage and platform for controlling the position of said platform relatively to said carriage independently of said abutment means.

Claim 7

In a vehicle of the class described, a main frame including a vertical mast, an elevating load carriage, means mounting said load carriage for vertical movement along said mast, means for moving said carriage vertically on said mounting means relatively to said main frame, an operator''s platform, means mounting said platform for vertical movement on said carriage and also for movement with said carriage, a lost motion connection between said platform and carriage whereby said carriage may move freely upwardly of said platform in a vertical direction for a predetermined distance and then moves said platform vertically upwardly therewith, said lost motion connection comprising abutment means on said carriage adapted to engage abutment means on said platform during upward movement of said carriage, said abutment means on said carriage dropping from contact with the abutment means on said platform to permit said carriage to move downwardly relatively to said platform when said platform reaches a predetermined position with respect to said main frame during downward travel of the carriage and platform, and a hydraulic ram between said carriage and platform for controlling the position of said platform relatively to said carriage independently of said abutment means.

Claim 8

In a vehicle of the class described, a main frame including a vertical mast, an elevating load carriage, means mounting said load carriage for vertical movement along said mast, means for moving said carriage vertically on said mounting means relatively to said main frame, an operator''s platform, means mounting said platform for vertical movement on said carriage and also for movement with said carriage, a lost motion connection between said platform and carriage whereby said carriage may move freely upwardly of said platform in a vertical direction for a predetermined distance and then moves said platform vertically upwardly therewith, said lost motion connection comprising abutment means on said carriage adapted to engage abutment means on said platform during upward movement of said carriage, said abutment means on said carriage dropping from contact with the abutment means on said platform to permit said carriage to move downwardly relatively to said platform when said platform reaches a predetermined position with respect to said main frame during downward travel of the carriage and platform, said abutment means being effective to lift said platform with said carriage after engaging said abutment means on the platform, and a hydraulic ram between said carriage and platform for controlling the position of said platform relatively to said carriage independently of said abutment means.

Claim 9

In a vehicle of the class described, a main frame including a vertical mast, an elevating load carriage, means mounting said load carriage for vertical movement along said mast, means for moving said carriage vertically on said mounting means relatively to said main frame, an operator''s platform, means mounting said platform for vertical movement on said carriage and also for movement with said carriage, a lost motion connection between said platform and carriage whereby said carriage may move freely upwardly of said platform in a vertical direction for a predetermined distance and then moves said platform vertically upwardly therewith, said lost motion connection comprising abutment means on said carriage adapted to engage abutment means on said platform during upward movement of said carriage, said abutment means on said carriage dropping from contact with the abutment means on said platform to permit said carriage to move downwardly relatively to said platform when said platform reaches a predetermined position with respect to said main frame during downward travel of the carriage and platform, said abutment means being effective to lift said platform with said carriage after engaging said abutment means on the platform, and a hydraulic ram between said carriage and platform for controlling the position of said platform relatively to said carriage independently of said abutment means.

Claim 10

In a vehicle of the class described, a main frame including a vertical mast, an elevating load carriage, means mounting said load carriage for vertical movement along said mast, means for moving said carriage vertically on said mounting means relatively to said main frame, an operator''s platform, means mounting said platform for vertical movement on said carriage and also for movement with said carriage, a lost motion connection between said plaTform and carriage whereby said carriage may move freely upwardly of said platform in a vertical direction for a predetermined distance and then moves said platform vertically upwardly therewith, and means for controlling the position of said platform relatively to said carriage independently of said lost motion means of connection.

Claim 11

In a vehicle of the class described, a main frame including a vertical mast, an elevating load carriage, means mounting said load carriage for vertical movement along said mast, means for moving said carriage vertically on said mounting means relatively to said main frame, an operator''s platform, means mounting said platform for vertical movement on said carriage and also for movement with said carriage, a lost motion connection between said plaTform and carriage whereby said carriage may move freely upwardly of said platform in a vertical direction for a predetermined distance and then moves said platform vertically upwardly therewith, and means for controlling the position of said platform relatively to said carriage independently of said lost motion means of connection.