Straightway valve
Patent 4173985 Issued on November 13, 1979. Estimated Expiration Date: 
July 8, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 8, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1632155 2151746 3286728 3412754 Straightway valve Patent #: 4058138 InventorApplicationNo. 05/814094 filed on 07/08/1977US Classes:137/512.1, Dividing and recombining in a single flow path137/512, Plural137/855Flap or reedExaminersPrimary: Cline, William R.Attorney, Agent or FirmInternational ClassesF01L 3/20 (20060101)F04B 39/10 (20060101) F01L 3/00 (20060101) AbstractA straightway valve for a positive-displacement machine comprises a polyhedral body with outlet ports and seat surfaces on the sides thereof, flat friction-free closure plates, and a means for attachment of the closure plates to the body, which takes the form of a polygon-shaped plate having on its ends clamping lugs for holding the closure plates in place on the seat surfaces of the body. The polygonal plate has, for example, a bore with projections formed around the periphery thereof and engaging a blind recess in the end face of the body, thus providing for a reliable and easily removable attachment of the plate to the valve body. The valve can serve as a suction and delivery valve in cylinders for compressors of any output with pressures of up to 1,500 kg/cm2 and with shaft rotational speeds of up to 3,000 revolutions per minute. | |
