Abstract: A vehicle cooling system subassembly, parts therefor and methods of making the same are provided, the subassembly comprising an outlet housing having an opening therein, and a vehicle type thermostat disposed in the opening of the outlet housing and having a housing provided with a valve seat that is controlled by a movable valve member which is interconnected to a temperature responsive device that is carried by the thermostat housing, the outlet housing having a positioning device thereon, the thermostat housing having a positioning device thereon engaging the positioning device of the outlet housing to rotationally orient the thermostat in the opening of the outlet housing in a desired rotational position thereof, the outlet housing having a slot therein, the thermostat housing having a tab extending outwardly therefrom and wedgingly disposed in the slot to hold the thermostat in the opening of the outlet housing in the desired rotational position thereof.

Abstract: A vehicle cooling system subassembly, parts therefor and methods of making the same are provided, the subassembly comprising an outlet housing having an opening therein, and a vehicle type thermostat disposed in the opening of the outlet housing and having a housing provided with a valve seat that is controlled by a movable valve member which is interconnected to a temperature responsive device that is carried by the thermostat housing, the outlet housing having a positioning device thereon, the thermostat housing having a positioning device thereon engaging the positioning device of the outlet housing to rotationally orient the thermostat in the opening of the outlet housing in a desired rotational position thereof, the outlet housing having a slot therein, the thermostat housing having a tab extending outwardly therefrom and wedgingly disposed in the slot to hold the thermostat in the opening of the outlet housing in the desired rotational position thereof.

Abstract: A valve construction and method of making the same are provided, the valve construction having an annular valve seat and a movable valve member for opening and closing the valve seat and being operatively interconnected to a thermal power element that is carried by the valve construction. The valve member has an annular rigid part for engaging the valve seat and has an annular flexible part for also engaging the valve seat at a point upstream of the rigid part, the parts of the valve member being so constructed and arranged that the rigid part moves out of engagement with and away from the valve seat a certain distance before the flexible part moves out of engagement with the valve seat. The flexible part of the valve member has an opening therethrough that is adapted to provide a certain sized fluid flow path through the flexible part of the valve member when the rigid part of the valve member is engaging the valve seat.

Abstract: A valve construction and method of making the same are provided, the valve construction having an annular valve seat and a movable valve member for opening and closing the valve seat and being operatively interconnected to a thermal power element that is carried by the valve construction. The valve member has an annular rigid part for engaging the valve seat and has an annular flexible part for also engaging the valve seat at a point upstream of the rigid part, the parts of the valve member being so constructed and arranged that the rigid part moves out of engagement with and away from the valve seat a certain distance before the flexible part moves out of engagement with the valve seat. The flexible part of the valve member has an opening therethrough that is adapted to provide a certain sized fluid flow path through the flexible part of the valve member when the rigid part of the valve member is engaging the valve seat.

Abstract: A single valve vehicle-type thermostat construction and method of making the same are provided, the thermostat construction comprising a temperature responsive device having a piston member and a cylinder member that are adapted to provide relative movement therebetween when the device senses certain temperatures, a single valve seat unit being operatively interconnected to one of the members, a single valve closure unit being operatively interconnected to the other of the members and being adapted to control fluid flow through the valve seat in relation to the position of the valve closure unit relative to the valve seat unit as determined by the temperature being sensed by the device, a first spring operatively interconnected to one of the members and to one of the units to always tend to hold the units against each other in a closed condition so as to prevent any fluid flow through the valve seat unit and, thus, through the thermostat construction, and a second spring operatively interconnected to the memb

Abstract: A valve construction having a valve seat and a movable valve member for opening and closing the valve seat and being operatively interconnected to a thermal power element carried by the valve construction, the valve member having a relatively narrow annular edge for closing against the valve seat in a direction substantially perpendicular to the valve seat and the valve seat having an annular flexible elastomeric insert that is wider than the annular edge of the valve member whereby the annular edge of the valve member closes against the annular flexible elastomeric insert within the inner and outer peripheral edges thereof to close the valve seat. The edge of the valve member is turned to present a knife-edge to the insert and an arcuate annular surface on the valve member that begins at the knife-edge.

Abstract: A thermostat construction having an annular flange secured between an engine block and a water outlet housing with the flange having an annular sealing member that is provided with a generally U-shaped cross-sectional configuration disposed about the peripheral end of the flange and with the peripheral end received in the bight of the U-shape to seal the flange to the block and to the housing. The annular sealing member initially has its bight facing at an angle to its assembled bight in order to facilitate the making of such annular sealing member and/or to facilitate the assembly of the annular sealing member to the thermostat flange by turning the bight from its initial facing direction to face and receive the peripheral end of the flange therein.

Abstract: A valve construction having a valve seat and a movable valve member for opening and closing the valve seat and being operatively interconnected to a thermal power element carried by the valve construction, the valve member having an annular metallic part for engaging the valve seat to close the same and having an annular flexible elastomeric part for also engaging the valve seat upstream from the metallic part to augment the closing of the valve seat. The annular flexible elastomeric part is molded to the metallic part to be carried thereby.

Abstract: A vehicle type thermostat having a housing provided with a valve seat that is controlled by a movable valve member is interconnected to a temperature responsive device carried by the housing, the housing having interference fit positioning abutments thereon for rotationally orienting the housing in a vehicle engine cooling system whereby the structure of the thermostat can be disposed in a desired rotational position within the engine cooling system. The housing includes a relatively short annular skirt disposed intermediate the opposed ends of the housing and having the positioning abutments thereon. The housing includes a spring retainer having an annular spring seat portion defining one of the opposed ends of the housing and having a pair of strap portions respectively extending from the spring seat portion to adjacent the annular skirt. A retaining member for positioning the thermostat in an outlet housing of an engine cooling system is secured to the strap portions.

Abstract: A vehicle-type thermostat having a housing provided with a valve seat that is controlled by a movable valve member which is interconnected to a temperature responsive device which is carried by the housing, the housing having interference fit positioning abutments thereon for rotationally orienting the housing in a vehicle engine cooling system whereby the structure of the thermostat can be disposed in a desired rotational position within the engine cooling system.

Abstract: A thermostat construction having an annular flange secured between an engine block and a water outlet housing with the flange having an annular sealing member that is provided with a generally U-shaped cross-sectional configuration disposed about the peripheral end of the flange and with the peripheral end received in the bight of the U-shape to seal the flange to the block and to the housing. The annular sealing member initially has its bight facing at an angle to its assembled bight in order to facilitate the making of such annular sealing member and/or to facilitate the assembly of the annular sealing member to the thermostat flange.

Abstract: A vehicle-type thermostat having a housing provided with a valve seat that is controlled by a movable valve member which is interconnected to a temperature responsive device which is carried by the housing, the housing having a positioning arrangement thereon for rotationally orienting the housing in a vehicle engine cooling system whereby the structure of the thermostat can be disposed in a desired rotational position within the engine cooling system.

Abstract: A thermal element having a cylinder member carrying a piston member that projects out of an opening of an end of the cylinder member to be extended and retracted relative thereto upon changes of sensed temperature. A washer-like resilient seal member is carried by the end of the cylinder member and has an opening therethrough that press-fittingly receives the piston member therethrough in such a manner that an inner peripheral portion of the washer-like seal member is turned into substantially parallel sealing and wiping engagement with the stem while being substantially transverse to the remainder of the washer-like seal member, the washer-like seal member containing abrasive material therein to provide a scraping action of the inner peripheral portion thereof against the piston member to clean the same as the piston member is moved relative thereto.

Abstract: A vehicle-type thermostat having a housing provided with a valve seat that is controlled by a movable valve member which is interconnected to a temperature responsive device which is carried by the housing, the housing having a positioning arrangement thereon for rotationally orienting the housing in a vehicle engine cooling system whereby the structure of the thermostat can be disposed in a desired rotational position within the engine cooling system.

Abstract: A self-contained vent valve unit for a liquid system wherein liquid is to substantially fill a cavity and thereafter be pressurized in the cavity, the valve unit having a first valve arrangement adapted to be disposed in fluid communication with the cavity for venting air from the cavity during low pressure filling of the cavity with the liquid. The first valve arrangement is adapted to automatically close upon the pressurization of the liquid in the cavity to a first certain value thereof. The valve unit has a second valve arrangement also adapted to be disposed in fluid communication with the cavity for venting the liquid from the cavity when the pressure of the liquid reaches a second certain value thereof.

Abstract: A vent valve arrangement for a thermostatically operated valve construction that has a valve member for opening and closing a valve seat in response to temperature sensed by a temperature responsive device that is interconnected to the valve member to move the same relative to the valve seat whereby the vent valve arrangement permits fluid flow through the valve seat when the valve seat is closed, the vent valve arrangement having a one-piece valve seat member provided with a valve seat opening and a chamber for containing a movable valve member therein with that movable valve member opening and closing the valve seat opening.

Abstract: A thermostatically operated valve construction for an engine coolant system and having a tubular sleeve valve member for opening and closing an annular valve seat of the construction at one end of the tubular sleeve valve member that is interconnected to a temperature responsive device, the sleeve valve member having a part thereof projecting from the one end thereof into and closely adjacent the annular valve seat when the sleeve valve member is between a closed position and a partially opened position to thereby meter the flow through the valve seat during a substantial portion of the initial opening movement of the sleeve valve member.

Abstract: A vent valve arrangement for a thermostatically operated valve construction that has a valve member for opening and closing a valve seat in response to temperature sensed by a temperature responsive device that is interconnected to the valve member to move the same relative to the valve seat whereby the vent valve arrangement permits fluid flow through the valve seat when the valve seat is closed, the vent valve arrangement having a one-piece valve seat member provided with a valve seat opening and a chamber for containing a movable valve member therein with that movable valve member opening and closing the valve seat opening.