Patent US3742971A successfully refreshed from Google Patents.
US3742971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling direction of movement of a cycling fluid motor
Assignee: Individual
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Filing: 1972-06-15
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Granted: 1973-07-03
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Expires: 1992-06-15
Abstract
Abstract The invention relates to a hydraulic valve fluid connected within a pressure system to a remote, reversible fluid motor which in turn is operable to apply a predetermined amount of force in one direction, then to withdraw the force, to apply it again, etc., the valve initially operated manually and then automatically operable to cycle the motor.
Inventors
- 👤 W Worthington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:21
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B11/15; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2554; Y10T137/8593; Y10T137/86389; Y10T137/86445; Y10T137/86485
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
357 words
Apparatus for controlling the operation of a reversing fluid motor operating through a cycle of changing from a first condition applying force in one direction, to a second condition applying force in another direction, then returning to the first condition, etc., the apparatus comprising: a fluid pressure system; valve means in communication with said fluid and having a neutral position where fluid is not directed to the motor, a second position where fluid is directed through said system to the motor to effect the first condition thereof, and a third position where fluid is directed through said system to the motor to effect the second condition thereof; means for positioning said valve means into at least one of said positions; detent means for releasably holding said valve means in either said second position or said third position; positioning means relatively movable with said valve means and having a first placement and a second placement; piston means engageable with said positioning means and responsive to a predetermined pressure in said system prior to the motor changing from the first condition to the second condition to move said positioning means from its second placement to its first placement; biasing means tending to maintain said valve means in its neutral position, said biasing means operable to move said positioning means from its first placement to its second placement in response to movement of said valve means to its second position, said biasing means further operable to move said valve means from its second position to its third position upon release of said valve means by said detent means, said biasing means operable in conjunction With said positioning means to move said valve means from its third position to its neutral condition upon release of said valve means by said detent means; and fluid pressure means in said system fluid associated with said detent means for releasing the hold of said detent means on said valve means, said hold overcoming the bias of said biasing means on said valve means, according to the pressure of said system reaching a predetermined value in response to a load being applied to said motor.
Claim 2
Dependent Claim
357 words
Apparatus for controlling the operation of a reversing fluid motor operating through a cycle of changing from a first condition applying force in one direction, to a second condition applying force in another direction, then returning to the first condition, etc., the apparatus comprising: a fluid pressure system; valve means in communication with said fluid and having a neutral position where fluid is not directed to the motor, a second position where fluid is directed through said system to the motor to effect the first condition thereof, and a third position where fluid is directed through said system to the motor to effect the second condition thereof; means for positioning said valve means into at least one of said positions; detent means for releasably holding said valve means in either said second position or said third position; positioning means relatively movable with said valve means and having a first placement and a second placement; piston means engageable with said positioning means and responsive to a predetermined pressure in said system prior to the motor changing from the first condition to the second condition to move said positioning means from its second placement to its first placement; biasing means tending to maintain said valve means in its neutral position, said biasing means operable to move said positioning means from its first placement to its second placement in response to movement of said valve means to its second position, said biasing means further operable to move said valve means from its second position to its third position upon release of said valve means by said detent means, said biasing means operable in conjunction With said positioning means to move said valve means from its third position to its neutral condition upon release of said valve means by said detent means; and fluid pressure means in said system fluid associated with said detent means for releasing the hold of said detent means on said valve means, said hold overcoming the bias of said biasing means on said valve means, according to the pressure of said system reaching a predetermined value in response to a load being applied to said motor.
Claim 3
Dependent Claim
40 words
Apparatus as defined in claim 1, and wherein the pressure necessary to activate said piston means to move said positioning means is less than the said predetermined pressure value necessary for releasing said detent means hold on said valve means.
Claim 4
Dependent Claim
82 words
Apparatus as defined in claim 2, and wherein said biasing means comprises a major operating spring and a minor centering spring, said major spring having a strength of expansion greater than that of said minor spring when both are compressed, said major spring operable to move said valve means from said second position to said third position upon release of said valve means by said detent means, and wherein said minor spring tends to move said valve body to said neutral position.
Claim 5
Dependent Claim
44 words
Apparatus as described in claim 3, and wherein said major spring is capable, when fully extended, to simultaneously move said valve body from said second position to said third position while overcoming the expansion force of said minor spring in its fully compressed condition.
Claim 6
Dependent Claim
56 words
Apparatus as described in claim 4, and wherein the force of said major spring holding said valve means in said third position is removed by action of said positioning means, whereupon said minor spring is operable alone to return said valve means to said neutral position upon release of said valve body by said detent element.
Claim 7
Dependent Claim
56 words
Apparatus as described in claim 1, and wherein said piston means includes a housing having a fluid chamber formed therein in fluid communication with said fluid pressure means, and having further a piston element reciprocally mounted therein, one end of said element responsive to said fluid pressure and the other end engageable with said positioning means.
Claim 8
Dependent Claim
246 words
Apparatus for controlling the direction of movement of a load movably mounted for longitudinal movement, and including further a fluid operated device operably connected with the load for reciprocating the load between two positions, the apparatus comprising: a fluid pressure system; valve means in said system in fluid communication with said device, and having a neutral position, a device force applying position, and a device force released position; means for positioning said valve means into any one of said positions; detent means interposed in said fluid pressure system and operatively engaged with said valve means for releasably holding said valve means in either said force applying position or said force released position, said detent means releasing its hold on said valve means in response to the pressure in said system reaching a predetermined value; positioning means relatively movable with said valve means and having a first position and a second position; piston means interposed in said fluid pressure system and operatively engaged with said positioning means, said piston means operable in response to the pressure within said system reaching a predetermined value to move said positioning means from its second position to its first position; and biasing means for biasing said valve means into the neutral position when said positioning means is in said first position, said biasing means operable to bias said valve means from the device force applying position to the device force released position when said positioning means is in its second position.
Claim 9
Dependent Claim
246 words
Apparatus for controlling the direction of movement of a load movably mounted for longitudinal movement, and including further a fluid operated device operably connected with the load for reciprocating the load between two positions, the apparatus comprising: a fluid pressure system; valve means in said system in fluid communication with said device, and having a neutral position, a device force applying position, and a device force released position; means for positioning said valve means into any one of said positions; detent means interposed in said fluid pressure system and operatively engaged with said valve means for releasably holding said valve means in either said force applying position or said force released position, said detent means releasing its hold on said valve means in response to the pressure in said system reaching a predetermined value; positioning means relatively movable with said valve means and having a first position and a second position; piston means interposed in said fluid pressure system and operatively engaged with said positioning means, said piston means operable in response to the pressure within said system reaching a predetermined value to move said positioning means from its second position to its first position; and biasing means for biasing said valve means into the neutral position when said positioning means is in said first position, said biasing means operable to bias said valve means from the device force applying position to the device force released position when said positioning means is in its second position.
Claim 10
Dependent Claim
23 words
Apparatus as defined in claim 7, and wherein said detent means predetermined pressure value is greater than said piston means predetermined pressure value.
Claim 11
Dependent Claim
27 words
Apparatus as defined iN claim 7, and wherein said piston means is non-resistant to movement of said positioning means from its first position to its second position.
Claim 12
Dependent Claim
45 words
Apparatus as defined in claim 7, and wherein said pressure values are determined by the resistance of the load to movement thereof by the fluid operated device, which device is reversibly actuated by said value means to automatically reciprocate the load between its alternate positions.
Claim 13
Dependent Claim
23 words
Apparatus as defined in claim 7, and including further means for latching said means for positioning said valve means into its neutral position.
References Cited (Backward Citations)
US3650297A
Cited
US3680583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |