Milsco Manufacturing Company

Milsco Manufacturing Company, a Unit of Jason Incorporated

Ronald T Uecker

Robert J Wahls

Bruce B Dahlbacka

Steven D Slicker

James R Lorbiecki

John R Schultz

An adjustable seat suspension for a vehicle seat that includes a linkage arrangement disposed between a seat frame and seat base whose collapse is opposed by a spring lever arm linkage arrangement supported on a fluid powered spring actuator carried by the base that has a plurality of pivotable spring lever arms that are each coupled to a portion of the frame. In a preferred embodiment, the fluid powered spring actuator is an air spring whose pressure is adjustable and which is powered by an air compressor to tailor suspension characteristics and provide a desired preload. The base includes an upright to which the spring lever arm linkage arrangement is pivotally mounted with its spring lever arms supported by a saddle carried by the air spring at a location disposed between the upright and where the spring lever arms couple with the seat suspension.

Adjustable vehicle seat suspension

A seat suspension having a stationary support that can be mounted on a vehicle. An intermediate frame is mounted on the stationary support for vertical sliding movement relative thereto by a spring suspension. A seat support frame is mounted on the intermediate frame for upward or downward movement relative thereto. A ratchet assembly interconnects the seat support frame and the intermediate frame and includes ratchet members on one of the frames and a pawl member on the other of the frames. A pawl release, including a biasing spring and a pawl actuating member, is provided to allow the support frame to be moved from the lower to any intermediate upper position and create an impulse at each position without need to activate said activating member. The activating member is operative to selectively move the pawl to a nonengagement position.

Seat suspension with quick height adjustment

A pivotable seat assembly for a mobile vehicle that allows the seat to be adjusted in fore or aft directions, pivoted to a position facing either of the directions, and then releasably latched against pivoting. The seat assembly includes a vertical support shaft member securable to the vehicle with a freestanding end having a primary abutment thereon; a rotatable support frame member having a top portion with the support frame member being rotatably mounted on the support shaft member so that the primary abutment projects beyond the top portion; a carriage for supporting the seat on the rotatable support frame member for sliding movement to a limit position; a latch assembly for selectively preventing rotation of the rotatable support frame member operatively connected between the support shaft and the rotatable support frame including, a fixed latch secured to one of the members, a shiftable latch mounted on the other member for movement into and out of engagement with the fixed latch, and a biasing spring for normally biasing the shiftable latch into engagement; a primary stop mounted on the carriage for movement therewith in the fore and aft directions and contactable with the primary abutment to define the carriage limit position; and a latch actuator mounted on the carriage for movement therewith into contact with the shiftable latch to move it out of engagement with the fixed latch and permit pivoting of the seat when the primary stop is in contact with the primary abutment to limit the amount of stress applied to the shiftable latch and the slidable carriage.

Pivotable seat assembly with latch mechanism

Chair

An adjustable office chair (10) comprises a base assembly (12), a seat assembly (14) and a backrest assembly (16). The seat assembly (14) is horizontally rotatable on the base assembly (12) and is raised and lowered thereon by a manually controlled pneumatic actuator (24) connected between the base and seat assemblies (12, 14). The seat assembly (14) comprises a lower seat frame (50) which is mounted on the piston rod (28) of the pneumatic actuator (24) for horizontal rotation and an upper seat frame (52) which is mounted for vertical pivotal movement on the lower seat frame (50). A seat pan (54) is movably mounted on the upper seat frame (52) and is manually movable to selected attitudes wherein it is automatically releasably latched by a mechanism (56). The backrest assembly (16) comprises a lower backrest frame (120) and an upper backrest frame (122) which can be adjustably tilted relative to the lower backrest frame (120) and locked in a selected tilt position by a manually operable tilt lock mechanism (56). The backrest assembly (16) can be forced to a reclining position against spring bias of biasing springs (76) as the chair occupant leans backward and such backrest reclining motion is accompanied by proportional rearward and downward sloping motion of the upper seat frame (52) of the seat assembly (14). A manually adjustable linkage (94, 95, 100) adjusts the amount of spring biasing force acting on the upper seat frame (52) and on the backrest assembly (16) during such reclining motion. A manually controlled lockout mechanism (171, 172) selectively prevents or permits such reclining motion.

Adjustable office chair

A seat suspension for resiliently attaching a seat assembly to a support frame on a vehicle so as to cushion the ride for the seat occupant comprises: main biasing springs operatively connected between the seat assembly and support frame to initially absorb energy and limit descent as the seat assembly is forced downward; auxiliary biasing springs, including a 'hard' spring and a 'soft' spring, to subsequently absorb energy and further limit descent after the main springs have been compressed a predetermined amount; and a shock absorber connected between the seat assembly and support frame to dampen vertical motion. A preloading apparatus is provided for adjusting or preloading the main biasing springs to take into account the weight of the seat occupant. A height adjusting apparatus is provided to adjust the height of the seat assembly and associated biasing springs relative to the support frame. A positioning apparatus is provided to enable the support frame to be shifted fore and aft relative to the vehicle.

Growing community of inventors

Slinger, WI, United States of America

Ronald T Uecker