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US 2022/0356659 A1Published application
Pneumatic Fare Gare
AssigneeSan Francisco Bay Area Rapid Transit District
InventorGarcia C. David
Life of this patent
Estimating the term…
Abstract
A pneumatic drive mechanism for converting linear motion from compressed air into rotational motion for use in fare gates and other applications.
Claims10
A pneumatic drive mechanism, comprising:
- A main piston,
- Said piston housed within a cylindrical housing,
- Said cylindrical housing having a first end and an opposing second end,
- Said cylindrical housing having a plurality of actuator pneumatic positions,
- Said actuator pneumatic positions containing compressed air connection ports,
- Said cylindrical housing first end connected to non-rotating spline shaft,
- Said non-rotating spline shaft having a first end and a second end,
- Said non-rotating spline shaft containing a plurality of cam-followers,
- Said first end of said non-rotating spline shaft connected said first end of said cylindrical housing,
- Said second end of said non-rotating spline shaft connected to a lower bearing housing assembly,
- Said lower bearing housing assembly having a first end and a second end,
- Said second end of said non-rotating spline shaft connected to said lower bearing housing assembly first end,
- Said second end of said lower bearing housing assembly connected to a helical cam shaft,
- Said helical cam shaft with a first end and a second end,
- Said second end of said lower bearing housing assembly connected to said first end of said helical cam shaft
- Said helical cam shaft containing a plurality of slot cams in a general helical orientation,
- Each said cam-follower oriented in a manner to travel along said slot cams,
- Said second end of said helical cam shaft connected to an upper bearing housing assembly,
- Said upper bearing housing assembly having a first end and a second end,
- Said second end of said helical cam shaft connected to said upper bearing housing assembly first end.
17 more elements
A pneumatic drive mechanism, comprising:
- A main piston,
- Said piston housed within a cylindrical housing,
- Said cylindrical housing having a first end and an opposing second end,
- Said cylindrical housing having a plurality of actuator pneumatic positions,
- Said actuator pneumatic positions containing compressed air connection ports,
- Said cylindrical housing first end connected to non-rotating spline shaft,
- Said non-rotating spline shaft having a first end and a second end,
- Said non-rotating spline shaft containing a plurality of cam-followers,
- Said first end of said non-rotating spline shaft connected said first end of said cylindrical housing,
- Said second end of said non-rotating spline shaft connected to a lower bearing housing assembly,
- Said lower bearing housing assembly having a first end and a second end,
- Said second end of said non-rotating spline shaft connected to said lower bearing housing assembly first end,
- Said second end of said lower bearing housing assembly connected to a helical cam shaft,
- Said helical cam shaft with a first end and a second end,
- Said second end of said lower bearing housing assembly connected to said first end of said helical cam shaft
- Said helical cam shaft containing a plurality of slot cams in a general helical orientation,
- Each said cam-follower oriented in a manner to travel along said slot cams,
- Said second end of said helical cam shaft connected to an upper bearing housing assembly,
- Said upper bearing housing assembly having a first end and a second end,
- Said second end of said helical cam shaft connected to said upper bearing housing assembly first end.
17 more elements
Dependencies are inferred from the claim text.