Valve arrangement in compressed air driven motors

Details Valve arrangement in compressed air driven motors Valve arrangement in compressed air driven motors

1996-08-16

1998-07-07

Lopez, F. Daniel

Motors: expansible chamber type

Cyclically operable

Working member controlled motive fluid for distributor motor

91317, F01L 2504

Patent

active

057751960

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to a valve arrangement in compressed-air operated impact motors comprising a machine housing having a cylinder and a bore connecting therewith, a valve housing mounted in the bore and supporting a flat valve which is movable in the valve housing between a front valve seat and a rear valve seat, wherein the rear valve seat is connected to the end of the cylinder that is located distal from the bore through channels provided in the machine housing, and the front valve seat is open towards the cylinder at a location adjacent the bore, wherein compressed air is delivered to the space between the valve seats through a delivery channel which opens laterally into the bore, and wherein a hammer piston is sealingly guided for reciprocating movement in the cylinder in response to movement of the flat valve and the hammer piston, said movement being governed by the alternating effect of compressed air on both sides of the hammer piston and the subsequent release of air through air-ventilation openings in a centre part of the cylinder.
2. Description of the Related Art
As illustrated in UK Patent Application GB 2 018 904 for instance, valve arrangements of this kind are normally comprised of metal components which need to be precision made and to fit accurately with one another in their assembled state, i.e. are dependent on time-consuming and expensive machining processes. Another drawback is that in the case of hand-carried machines, the metal components cause the machines to be relatively heavy and troublesome to the user and also tend to cause rust problems after the machine has been used for a long period of time. Furthermore, conventional valve housing components have a form which do not enable the components to be readily exchanged constructively in practice for components that are lighter in weight and that are made of a corrosion-resistant material. The conventional valve housing parts may also include small components, which also makes such an exchange difficult to achieve in practice.


OBJECTS AND SUMMARY OF THE INVENTION

The object of the present invention is to provide valve arrangements or assemblies of the aforesaid kind with which the aforementioned drawbacks with regard to weight, cost and durability are eliminated, and therewith give the valve housing a form which will enable the housing to be manufactured conveniently from plastic material, such as to enable the housing to be assembled and fitted immediately without needing to machine the housing components to precise finishes, therewith lowering the cost of the valve housing. Another object is to construct the valve housing so that the airflow to the valve seats in the housing interior can be calibrated appropriately in a manner to optimize the reciprocating movement of the impact breaker. These objects are achieved with an inventive valve arrangement having the characteristic features set forth in the following claims.
In accordance with the present invention, a valve arrangement in compressed-air operated impact motors (10) includes a machine housing (11) having a cylinder (20) and a bore (23) connecting therewith, a valve housing (40) mounted in the bore (23) and supporting a flat valve (50) which is movable in the valve housing between a front valve seat (51) and a rear valve seat (52). The rear valve seat (52) is connected to the end of the cylinder (20) that is located distal from the bore (23) through channels (44, 45) provided in the machine housing (11), and the front valve seat (51) is open towards the cylinder (20) at a location adjacent the bore (23). The compressed air is delivered to the space between the valve seats (51, 52) through a delivery channel (39) which opens laterally into the bore (23). A hammer piston (22) is sealingly guided for reciprocating movement in the cylinder (20) in response to movement of the flat valve (50) and the hammer piston (22), said movement being governed by the alternating effect of compressed air on both sides of t

REFERENCES:
patent: 4446773 (1984-05-01), Emonet

Affiliated with

Also associated with

Rating

Valve arrangement in compressed air driven motors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Valve arrangement in compressed air driven motors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve arrangement in compressed air driven motors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1194846