US3734316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling direction of movement of refuse body compacting and unloading blade
Assignee: Individual
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Filing: 1971-10-26
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Granted: 1973-05-22
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Expires: 1991-10-26
Abstract
Abstract The invention relates to a valve arrangement including a spool mounted within the valve body and positionable among first, neutral and second positions for controlling the passage of fluid through the valve; a detent mechanism for releasably holding the spool in a position subsequent to manual movement of the spool to the position; a plunger within the valve body and axially associated with the spool for relative movement therewith, the plunger subject to movement in relation to the position of a force applying member movable between two positions; a pair of oppositely acting springs axially interposed within the valve body between the sppol and the plunger for biasing the plunger toward a neutral position; and fluid pressure means operable in response to the member being resisted by a predetermined resistance to release the detent mechanism whereby automatic positioning of the plunger for controlly movement of the member is obtainable.
Inventors
- 👤 S Worthington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:05
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F16K11/0704; B; B65; B65F; B65F3/00; B65F3/24; B65F3/28
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
348 words
Apparatus for controlling the direction of movement of a compacting and unloading blade movably mounted for longitudinal movement within a refuse vehicle body, the body having a front end and a rear end between which the blade moves, and including further a fluid operated cylinder device operably connected between the front end and the blade for moving the blade in an extending, compacting manner toward the rear end and in a retracting manner toward the front end, the apparatus comprising; a fluid pressure system including a pump and a reservoir; valve means in said system mounted on the body in fluid communication with said device, and having a neutral position, a device extending position, and a device retracting position; manually operated handle means mounted on the body for manually positioning said valve means into any one of said positions; detent means associated with said valve means for releasably holding said valve means in either of said device extending and device retracting positions; plunger meaNs relatively movable with said detent means and having a first position and a second position; rocker arm means mounted on the blade and engageable with said plunger means when the blade is in its retracted position, and holding said plunger means in its first position, said rocker arm means movable away from said plunger means upon extending movement of the blade; biasing means interposed between said detent means and said plunger means for biasing said valve means via said detent means into the neutral position when said plunger means is in said first position, said biasing means operable to bias said valve means from the device extending position to the device retracting position when said plunger means is in its second position; and fluid pressure means in said system and associated with said detent means for releasing said detent means holding said valve means upon the pressure of the system reaching a predetermined value at the end of both the device extending movement and the device retracting movement, said biasing means operable to move said valve means upon release thereof by said detent means.
Claim 2
Dependent Claim
348 words
Apparatus for controlling the direction of movement of a compacting and unloading blade movably mounted for longitudinal movement within a refuse vehicle body, the body having a front end and a rear end between which the blade moves, and including further a fluid operated cylinder device operably connected between the front end and the blade for moving the blade in an extending, compacting manner toward the rear end and in a retracting manner toward the front end, the apparatus comprising; a fluid pressure system including a pump and a reservoir; valve means in said system mounted on the body in fluid communication with said device, and having a neutral position, a device extending position, and a device retracting position; manually operated handle means mounted on the body for manually positioning said valve means into any one of said positions; detent means associated with said valve means for releasably holding said valve means in either of said device extending and device retracting positions; plunger meaNs relatively movable with said detent means and having a first position and a second position; rocker arm means mounted on the blade and engageable with said plunger means when the blade is in its retracted position, and holding said plunger means in its first position, said rocker arm means movable away from said plunger means upon extending movement of the blade; biasing means interposed between said detent means and said plunger means for biasing said valve means via said detent means into the neutral position when said plunger means is in said first position, said biasing means operable to bias said valve means from the device extending position to the device retracting position when said plunger means is in its second position; and fluid pressure means in said system and associated with said detent means for releasing said detent means holding said valve means upon the pressure of the system reaching a predetermined value at the end of both the device extending movement and the device retracting movement, said biasing means operable to move said valve means upon release thereof by said detent means.
Claim 3
Dependent Claim
53 words
Apparatus as defined in claim 1 wherein said valve means includes a three position spool valve mounted for axial movement within a valve body having a pair of pressure inlet ports, a pair of pressure outlet ports in fluid communication with opposite ends of the cylinder device, and a pair of exhaust ports.
Claim 4
Dependent Claim
86 words
Apparatus as defined in claim 2 wherein said detent means includes a detent body secured to said spool valve for axial movement therewith in said valve body, said detent body having a pair of longitudinally spaced grooves formed therein, a ball, a spring biased plunger forcing said ball against said detent body in a neutral position, and into either of said grooves in either the device extending or the device retracting positions, and a detent cup mounted on said detent body for axial relative movement thereto.
Claim 5
Dependent Claim
84 words
Apparatus as defined in claim 3 wherein said plunger means includes a plunger axially movable within said valve body between a first position against said detent body and a second position against a shoulder former within said valve body spaced from said detent body, and a rocker arm pivotally mounted on said valve body and engageable with an outer end of said plunger for moving said plunger from said second position to said first position, said rocker arm engageable by said rocker arm means.
Claim 6
Dependent Claim
102 words
Apparatus as defined in claim 4 wherein said biasing means includes a primary spring inserted between said valve body and said detent cup and biasing said detent cup, detent body and spool valve toward the device retracting position, and a secondary spring inserted between said detent cup and said plunger and biasing said detent cup, detent body and spool valve toward the device extending position, said springs operable with said plunger in its first position to force said spool valve to the neutral position, and with said plunger in its second position to force said spool valve to the device retracting position.
Claim 7
Dependent Claim
98 words
Apparatus as defined in claim 5 wherein said fluid pressure means includes a housing for said detent spring biased plunger and having a chamber formed within said housing in fluid communication with said pump for receiving fluid pressure therefrom, said plunger having a section of a diameter within said chamber smaller than another section thereof whereby said pressure acts to force said spring biased plunger away from said detent ball such that said primary and secondary springs are operable to overcome the force of said detent ball in either of said grooves and to move said spool valve.
Claim 8
Dependent Claim
273 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; handle means for positioning said valve means into any one of said positions; detent means associated with said valve means for releasably holding said valve means in either of said positions; positioning means relatively movable with respect to said valve means and having a first position and a second position; movable means engageable with said positioning means when the load is in one position, and holding said positioning means in its first position, said movable means movable away from said positioning means upon movement of the load out of said one position; 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; and fluid pressure means in said system and associated with said detent means for releasing the hold of said detent means on said valve means in response to the pressure of the system reaching a predetermined value when the load is in either of its two positions, said biasing means operable to move said valve means upon release thereof by said detent means.
Claim 9
Dependent Claim
273 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; handle means for positioning said valve means into any one of said positions; detent means associated with said valve means for releasably holding said valve means in either of said positions; positioning means relatively movable with respect to said valve means and having a first position and a second position; movable means engageable with said positioning means when the load is in one position, and holding said positioning means in its first position, said movable means movable away from said positioning means upon movement of the load out of said one position; 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; and fluid pressure means in said system and associated with said detent means for releasing the hold of said detent means on said valve means in response to the pressure of the system reaching a predetermined value when the load is in either of its two positions, said biasing means operable to move said valve means upon release thereof by said detent means.
Claim 10
Dependent Claim
285 words
Apparatus for controlling the application of force to a load by a fluid operated device operably connected to the load for moving the load from one position to another position, comprising: a fluid pressure system; valve means in said system in fluid communication with said device and having a neutral position, a second position wherein said device is moving the load from one position to the other position, and a third position where the device is returning the load from the other position to the one position; handle means for positioning said valve means into one of said positions; detent means for releasably holding said valve means against movement in either said second position or said third position; positioning means relatively movable with said valve means and having a first position and a second position, said positioning means responsive to the load in the one position of said load; biasing means tending to maintain said valve means in said neutral position, said biasing means operable to move said valve means from said second position to said third position upon release of said valve means by said detent means, said biasing means operable to move said positioning means from said first position to said second position upon release of said valve means by said detent means, said biasing means responsive to said positioning means when the load assumes its one position to return said valve means to said neutral position; and fluid pressure means in said system associated with said detent means for controlling the hold of said detent means on said valve means in response to the pressure of the system reaching a predetermined valve upon the load moving into either of its two positions.
Claim 11
Dependent Claim
285 words
Apparatus for controlling the application of force to a load by a fluid operated device operably connected to the load for moving the load from one position to another position, comprising: a fluid pressure system; valve means in said system in fluid communication with said device and having a neutral position, a second position wherein said device is moving the load from one position to the other position, and a third position where the device is returning the load from the other position to the one position; handle means for positioning said valve means into one of said positions; detent means for releasably holding said valve means against movement in either said second position or said third position; positioning means relatively movable with said valve means and having a first position and a second position, said positioning means responsive to the load in the one position of said load; biasing means tending to maintain said valve means in said neutral position, said biasing means operable to move said valve means from said second position to said third position upon release of said valve means by said detent means, said biasing means operable to move said positioning means from said first position to said second position upon release of said valve means by said detent means, said biasing means responsive to said positioning means when the load assumes its one position to return said valve means to said neutral position; and fluid pressure means in said system associated with said detent means for controlling the hold of said detent means on said valve means in response to the pressure of the system reaching a predetermined valve upon the load moving into either of its two positions.
Claim 12
Dependent Claim
92 words
Apparatus as described in claim 8 and further wherein said valve means includes a movable valve body having a pair of depressions formed therein; said detent means includes an element normally biased into engagement with either of said valve body depressions, said element bias overcome by said fluid pressure at a predetermined value thereof; and said biasing means including a major operating spring tending to move said valve body from said second position to said third position, and a minor centering spring tending to move said valve body into said neutral position.
Claim 13
Dependent Claim
80 words
Apparatus as described in claim 9 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 load upon said positioning means, and said minor spring tends to move said valve body to said neutral position.
Claim 14
Dependent Claim
44 words
Apparatus as described in claim 10, 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 15
Dependent Claim
56 words
Apparatus as described in claim 10 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 16
Dependent Claim
36 words
Apparatus as described in claim 10, and wherein said minor spring is compressed in either of said valve means second and third positions, and when compressed acts to maintain said valve means in its neutral position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |