Motor with spring elements formed on valve assembly

Details Motor with spring elements formed on valve assembly Motor with spring elements formed on valve assembly

1991-10-22

1993-04-20

Look, Edward K.

Motors: expansible chamber type

Cyclically operable

Distributor in piston

91229, 91235, 91417R, 91422, F01L 1512, F15B 1517

Patent

active

052032515

ABSTRACT:
The present invention relates to a valve assembly (10) which is mounted on a part (piston unit 40) of an air motor (10) arranged for reciprocating movement in a housing (cylinder 12). The valve assembly includes a first valve unit (50), which is mounted on one side of the part (40), and a second valve unit (70), which is mounted on the other side of the part (40). The second valve unit is connected to the first valve unit (50) by means of the part (40) for common movement with the first valve unit relative to the part (40) when the valve assembly is switched as the part (40) reaches one of its two end turning-positions. In order to enable the valve assembly to be switched instantaneously and to eliminate the risk that switching the assembly will not take place, particularly when the motor is operated at a low speed, it is proposed in accordance with the invention, among other things, that each of the valve units (50 and 70 respectively) is produced from an elastomeric material and is provided with integrally formed spring elements (52 and 72 respectively) which will strike against solid abutments (18, 22) in the housing (12) upon mechanical switching of the valve assembly.

REFERENCES:
patent: 2091390 (1937-08-01), Forman
patent: 2987051 (1961-06-01), Goyette et al.
patent: 3094938 (1963-06-01), Blomeke et al.
patent: 3654834 (1972-04-01), Sifri et al.
patent: 4879943 (1989-11-01), Grach
patent: 4895305 (1990-01-01), Powell

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