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US 4,284,038 AGranted
Reciprocating drive means
AssigneesBaron Hire Limited, Frank Edward West
InventorFrank E. West
Life of this patent
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AssigneesBaron Hire Limited, Frank Edward West
InventorFrank E. West
Estimating the term…
Reciprocating drive means powered by a fluid such as compressed air comprising an elongate inner member with a plurality of passageways therein, an outer member slidable on the inner member and a shuttle member slidable with respect to the inner member and within the outer member, the passageways in the inner member being variously and intermittently so connected in use to each other by way of ports in the inner member and compartments provided within the outer member and the shuttle that, upon connection of a determined one of said passageways to a fluid pressure source the outer member moves with reciprocating action with respect to the inner member. The inner member has two fixed discs thereon, between which discs the shuttle member can oscillate, the discs having seals on their peripheral surfaces to seal against the inner wall of the outer member, the outer member is cylindrical with end walls having seals slidable on the inner member and cooperating with ports therein and the shuttle member has axially spaced seals on its inner peripheral surface to cooperate with ports in the inner member and to seal against the inner member and define one of the compartments therebetween. Following movement of the outer member in one direction of movement, the shuttle member is moved by pressure in an opposite direction to cause the outer member to move in said opposite direction.
Reciprocating drive means comprising an elongate inner member with a plurality of passageways therein, two fixed plates on said inner member, an outer member slidable on said inner member, a seal at the peripheral surfaces of each of said fixed plates to seal against the inner face of the wall of said outer member, an end wall on said outer member with a seal at said end wall slidable on said inner member, a shuttle member slidable with respect to said inner member between said two fixed plates and within said outer member, a seal at the outer peripheral surface of said shuttle member to seal against said inner face of the wall of said outer member and axially spaced seals at the inner peripheral surface of said shuttle member to seal against said inner member, a first compartment formed between said axially spaced seals, and ports in said inner member communicating respective ones of said passageways in said inner member with the surface thereof, said ports co-operating in use with the relatively moving said outer member and said shuttle member to effect valving operations to interconnect said passageways with one another and with compartments formed between said inner member and said outer member and separated from one another by said fixed plates and said shuttle member.
Dependencies are inferred from the claim text.