Pneumatic cylinder device for trailer or semitrailer vehicles
First Claim
1. Pneumatic cylinder device for trailer or semitrailer vehicles which, according to the angle of rotation between the truck and semi-trailer or the tractor and the trailer, assumes an angular position which transmits the command for power assisted steering of the wheels on the steering or self-steering axle of the respective semi-trailer or trailer, characterised in that the pneumatic cylinder is a single-action device and comprises an extended cylindrical body with a head and a base, the end of the latter being attached to an additional pin fixed on a semi-trailer or, respectively, on a trailer, the cylinder housing a piston which slides along the cylinder and a rod connected to the piston, also comprising a supply hole communicating with a circuit designed to supply pressurised air into a first chamber formed between the piston and the head, and a second, air bleed hole communicating with a second chamber formed between the piston and the base, in which the rod passes through the head (22), the end of the rod being attached, with a rotary connection, to the end of a bracket, fixed on a fifth wheel coupling or, respectively, on a towing hitch, the rod acting as a longitudinally extending and transversally rigid tie rod for the presence of pressurised air supplied to the inside of the cylinder through the supply hole.
1 Assignment
0 Petitions
Accused Products
Abstract
A pneumatic cylinder device (10) for trailer or semitrailer vehicles which, according to the angle of rotation between the truck (46) and the semi-trailer (35) or between the tractor (47) and the trailer (48), assumes an angular position which transmits the command for power assisted steering of the wheels on the steering or self-steering axle of the respective semi-trailer (35) or trailer (48) the pneumatic cylinder (11) is a single-action device and a base (24), the end of the latter attached to an additional pin (28) fixed on a semi-trailer (35) or, respectively, on a trailer (48), the cylinder (11) housing a piston (21) which slides along the cylinder and a rod (14; 26) connected to the piston (21), the rod (14; 26) acting as a longitudinally extending and transversally rigid tie rod for the presence of pressurised air supplied to the inside of the cylinder through a supply hole (23).
20 Citations
19 Claims
- 1. Pneumatic cylinder device for trailer or semitrailer vehicles which, according to the angle of rotation between the truck and semi-trailer or the tractor and the trailer, assumes an angular position which transmits the command for power assisted steering of the wheels on the steering or self-steering axle of the respective semi-trailer or trailer, characterised in that the pneumatic cylinder is a single-action device and comprises an extended cylindrical body with a head and a base, the end of the latter being attached to an additional pin fixed on a semi-trailer or, respectively, on a trailer, the cylinder housing a piston which slides along the cylinder and a rod connected to the piston, also comprising a supply hole communicating with a circuit designed to supply pressurised air into a first chamber formed between the piston and the head, and a second, air bleed hole communicating with a second chamber formed between the piston and the base, in which the rod passes through the head (22), the end of the rod being attached, with a rotary connection, to the end of a bracket, fixed on a fifth wheel coupling or, respectively, on a towing hitch, the rod acting as a longitudinally extending and transversally rigid tie rod for the presence of pressurised air supplied to the inside of the cylinder through the supply hole.
Specification