US3892141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Landing gear with shaft detent clip retainer
Assignee: Dayton Walther Corp
•
Filing: 1973-11-19
•
Granted: 1975-07-01
•
Expires: 1993-11-19
Abstract
Abstract A geared two-speed landing gear mechanism for semi-trailers is disclosed, of the type in which a hand-crank shaft is movable axially to select two gear ratios. A detent mechanism for defining the shaft position includes an elongated C-shaped spring clip which selectively engages one of a pair of grooves on the shaft. A clip retainer is formed on one wall of the gear casing and includes a pair of bent-wire retainers which are stud-welded to the wall at opposite sides of the shaft opening defining an access space therebetween for the insertion or the removal of a shaft-supporting bearing. The retainers have laterally turned ends which engage the clip to restrain it against axial movement. The retainers also support the clip in an aligned condition for ease in the insertion or removal of the shaft.
Inventors
- 👤 Jr Charles Edward Phillips
- 👤 Thomas Robert Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:35
CPC Classifications
B; B60; B60S; B60S9/00; B60S9/14; B60S9/16; B60D; B60D1/00; B60D1/58; B60D1/66; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19293; Y10T74/19298; Y10T74/19307; Y10T74/20; Y10T74/20012; Y10T74/20018; Y10T74/20085; Y10T74/20128; Y10T74/21; Y10T74/2133; Y10T74/2141
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
220 words
In a geared speed reduction crank mechanism for a semitrailer landing gear, the improvement comprising a gear case having a wall, means in said wall defining a bearing opening, a bearing removably received in said opening, a hand crank shaft received in said bearing and supporting gear means thereon, said shaft being movable axially in said bearing to select different gear ratios for raising and lowering the landing gear, means in said shaft defining axially-spaced grooves corresponding to selectable axial shaft positions, a generally C-shaped elongated detent spring clip on said shaft having a pair of parallel legs with opposite ends overlying said wall and a central portion thereof selectably engageable with said grooves, and a pair of clip retainers on said wall positioned on diametric opposite sides of said opening and defining therebetween a space for access to insert and remove said bearing, said retainers each having a leg portion extended axially of the shaft in the space between said clip legs and terminating in a laterally turned retainer portion overlying said wall in spaced relation thereto defining with said wall a clip-receiving space, said retainer portions being positioned to engage said clip adjacent the opposite ends thereof and restrain it against axial movement while permitting unrestricted opening and closing movement of the legs thereof with said shaft movement.
Claim 2
Dependent Claim
220 words
In a geared speed reduction crank mechanism for a semitrailer landing gear, the improvement comprising a gear case having a wall, means in said wall defining a bearing opening, a bearing removably received in said opening, a hand crank shaft received in said bearing and supporting gear means thereon, said shaft being movable axially in said bearing to select different gear ratios for raising and lowering the landing gear, means in said shaft defining axially-spaced grooves corresponding to selectable axial shaft positions, a generally C-shaped elongated detent spring clip on said shaft having a pair of parallel legs with opposite ends overlying said wall and a central portion thereof selectably engageable with said grooves, and a pair of clip retainers on said wall positioned on diametric opposite sides of said opening and defining therebetween a space for access to insert and remove said bearing, said retainers each having a leg portion extended axially of the shaft in the space between said clip legs and terminating in a laterally turned retainer portion overlying said wall in spaced relation thereto defining with said wall a clip-receiving space, said retainer portions being positioned to engage said clip adjacent the opposite ends thereof and restrain it against axial movement while permitting unrestricted opening and closing movement of the legs thereof with said shaft movement.
Claim 3
Dependent Claim
52 words
The mechanism of claim 1 in which said retainer leg portions are positioned diametrically opposite said opening, and said clip legs are received on opposite sides of said leg portions with said central portion thereof partially encircling said shaft, said clip being loosely supported on said retainers when said shaft is withdrawn.
Claim 4
Dependent Claim
231 words
In a geared speed reduction crank mechanism for a semi-trailer landing gear, the improvement comprising a gear case having a wall, means in said wall defining a bearing opening, a flanged bearing removably received in said opening and having a flange received on the inside surface of said wall, a hand crank shaft received in said bearing, gear means on said shaft, said shaft being axially movable to select different gear ratios for raising and lowering the landing gear, means in said shaft defining axially-spaced grooves corresponding to selectable axial shaft positions, a transversely elongated detent spring clip on said shaft having opposite legs adjacent said bearing flange, said legs being formed with a central semi-curved portion selectably engageable in said grooves with a spreading and a closing movement of said legs, and a pair of clip retainers on said wall positioned on diametric opposite sides of said flange and defining therebetween a space for access to insert and remove said bearing, said retainers each having a leg portion extending axially of said shaft in the space between said clip legs and terminating in a laterally turned retainer portion overlying said wall in spaced relation thereto and axially inwardly of said bearing flange, said retainer portions being proportioned to engage said clip legs adjacent the opposite ends thereof and restrain said clip against axial movement while permitting said groove-engaging leg movement.
Claim 5
Dependent Claim
231 words
In a geared speed reduction crank mechanism for a semi-trailer landing gear, the improvement comprising a gear case having a wall, means in said wall defining a bearing opening, a flanged bearing removably received in said opening and having a flange received on the inside surface of said wall, a hand crank shaft received in said bearing, gear means on said shaft, said shaft being axially movable to select different gear ratios for raising and lowering the landing gear, means in said shaft defining axially-spaced grooves corresponding to selectable axial shaft positions, a transversely elongated detent spring clip on said shaft having opposite legs adjacent said bearing flange, said legs being formed with a central semi-curved portion selectably engageable in said grooves with a spreading and a closing movement of said legs, and a pair of clip retainers on said wall positioned on diametric opposite sides of said flange and defining therebetween a space for access to insert and remove said bearing, said retainers each having a leg portion extending axially of said shaft in the space between said clip legs and terminating in a laterally turned retainer portion overlying said wall in spaced relation thereto and axially inwardly of said bearing flange, said retainer portions being proportioned to engage said clip legs adjacent the opposite ends thereof and restrain said clip against axial movement while permitting said groove-engaging leg movement.
Claim 6
Dependent Claim
187 words
In a geared speed reduction crank mechanism for a semi-trailer landing gear, the improvement comprising a gear case having a wall, means in said wall defining a bearing opening, a bearing in said opening, a shaft received in said bearing and supporting gear means thereon, said shaft being movable axially in said bearing to select different gear ratios For raising and lowering the landing gear, means in said shaft defining a pair of axially-spaced grooves corresponding to selectable axial shaft positions, a generally C-shaped elongated detent spring clip on said shaft having opposite ends overlying said wall and a central portion selectably engageable with said grooves, and a pair of clip retainers on said wall formed of rod-like material and positioned on opposite sides of said bearing, said retainers each having an axially extending leg portion which is stud-welded to said wall and terminating in a laterally-turned retainer portion overlying said wall defining a clip-receiving space, said retainer portions being positioned to engage said clip adjacent the opposite ends thereof and restrain it against axial movement while permitting opening and closing movement thereof with said shaft movement.
Claim 7
Dependent Claim
187 words
In a geared speed reduction crank mechanism for a semi-trailer landing gear, the improvement comprising a gear case having a wall, means in said wall defining a bearing opening, a bearing in said opening, a shaft received in said bearing and supporting gear means thereon, said shaft being movable axially in said bearing to select different gear ratios For raising and lowering the landing gear, means in said shaft defining a pair of axially-spaced grooves corresponding to selectable axial shaft positions, a generally C-shaped elongated detent spring clip on said shaft having opposite ends overlying said wall and a central portion selectably engageable with said grooves, and a pair of clip retainers on said wall formed of rod-like material and positioned on opposite sides of said bearing, said retainers each having an axially extending leg portion which is stud-welded to said wall and terminating in a laterally-turned retainer portion overlying said wall defining a clip-receiving space, said retainer portions being positioned to engage said clip adjacent the opposite ends thereof and restrain it against axial movement while permitting opening and closing movement thereof with said shaft movement.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |