Patent US3831999A successfully refreshed from Google Patents.
US3831999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lost motion connection means for hydraulic piston-cylinder device
Assignee: Enerpac Tool Group Corp
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Filing: 1972-12-06
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Granted: 1974-08-27
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Expires: 1992-12-06
Abstract
Abstract A hydraulic piston-cylinder device or tilt cylinder for tilting a truck cab relative to its chassis to permit access to the engine positioned below the cab comprises lost motion connection means which permit the main piston to remain stationary relative to the cylinder while permitting slight relative movement of the cab and chassis. One end of the cylinder is pivotally connected to the truck chassis by a pin. The cab is provided with a fixed cylindrical pin for connection to the free end of the piston through the lost motion connection means. In one embodiment, the pin slidably engages a slot provided in a connecting member rigidly secured to the free end of the main piston. In a second embodiment, the pin is connected to a cylindrical hole in the connecting member or sleeve which is slidably mounted on the free end of the piston and the connecting member and is further provided with a slot engageable with another cylindrical pin rigidly secured to the free end of the main piston. In a third embodiment, the connecting member is in the form of a small piston which is slidable in an axial bore provided in the free end of the main piston and the free end of the small piston is provided with a cylindrical hole for engagement with the pin on the cab. The fourth embodiment resembles the third embodiment in comprising a small piston but further comprises a fluid passage in the main piston interconnecting the axial bore and the cylinder and further comprises a free hydraulic piston slidably mounted in the bore between the small piston and the port of the passage.
Inventors
- 👤 L Sonneborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:59
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/02; B; B62; B62D; B62D33/00; B62D33/06; B62D33/063; B62D33/067; B62D33/07; F15B15/08; F15B15/14; F15B15/1423; F15B15/148; Y; Y10; Y10S; Y10S92/00; Y10S92/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
218 words
In a truck having a chassis part and a cab part tiltably mounted thereon and movable through an overcenter position between an over-the-road position and a fully tilted position; a hydraulic device having a cylinder component and a relatively movable main piston component for adjusting the angular position of the cab part with respect to the chassis part; means for pivotably connecting one component at one end of said hydraulic device to one of said cab and chassis parts; first and second fluid ports in said cylinder on opposite sides of said main piston; and lost-motion connection means for pivotably connecting the other component at the other end of said hydraulic device to the other of said cab and chassis parts and for permitting slight relative movement between said cab part and chassis part while said cab part is in said over-the-road position and while said cylinder and main piston components remain stationary with respect to each other, said lost-motion connection means comprising a bore in said other component, a lost-motion piston slidably mounted in said bore, means on said piston component for preventing said lost-motion piston from being expelled from said bore when said cab moves through said overcenter position, and means for pivotally connecting said lost-motion piston to the other of said cab and chassis parts.
Claim 2
Dependent Claim
218 words
In a truck having a chassis part and a cab part tiltably mounted thereon and movable through an overcenter position between an over-the-road position and a fully tilted position; a hydraulic device having a cylinder component and a relatively movable main piston component for adjusting the angular position of the cab part with respect to the chassis part; means for pivotably connecting one component at one end of said hydraulic device to one of said cab and chassis parts; first and second fluid ports in said cylinder on opposite sides of said main piston; and lost-motion connection means for pivotably connecting the other component at the other end of said hydraulic device to the other of said cab and chassis parts and for permitting slight relative movement between said cab part and chassis part while said cab part is in said over-the-road position and while said cylinder and main piston components remain stationary with respect to each other, said lost-motion connection means comprising a bore in said other component, a lost-motion piston slidably mounted in said bore, means on said piston component for preventing said lost-motion piston from being expelled from said bore when said cab moves through said overcenter position, and means for pivotally connecting said lost-motion piston to the other of said cab and chassis parts.
Claim 3
Dependent Claim
37 words
A truck according to claim 1 including shock absorbing means in said bore for acting upon said lost-motion piston to cushion the movement thereof relative to said other component as said cab part moves through overcenter position.
Claim 4
Dependent Claim
25 words
A truck according to claim 2 wherein said shock absorbing means comprises biasing means disposed in said bore on opposite sides of said lost-motion piston.
Claim 5
Dependent Claim
68 words
A truck according to claim 3 wherein said means for pivotably connecting said one component to said one part comprises a pin on said one part and a pin-receiving opening in said one component and wherein said means for pivotally connecting said lost-motion piston to said other part comprises a pin on said other part and a pin receiving opening in the pistor rod of said lost-motion piston.
Claim 6
Dependent Claim
178 words
In a truck having a chassis and a cab tiltably mounted thereon and movable through an overcenter position between an over-the-road position and a fully tilted position; a hydraulic device for having a cylinder and a relatively movable main piston for adjusting the angular position of the cab with respect to the chassis; means for pivotally connecting said cylinder to said chassis; first and second fluid ports in said cylinder on opposite sides of said main piston; and lost-motion connection means for pivotally connecting said main piston to said cab and for permitting slight relative movement between said cab and chassis while said cab is in said over-the-road position while said cylinder and main piston remain relatively stationary with respect to each other, said lost motion connection means comprising a bore in said main piston, a lost-motion piston slidably mounted in said bore, means on said main piston for preventing said lost-motion piston from being expelled from said bore when said cab moves through said overcenter position and means for pivotably connecting said lost-motion piston to said cab.
Claim 7
Dependent Claim
178 words
In a truck having a chassis and a cab tiltably mounted thereon and movable through an overcenter position between an over-the-road position and a fully tilted position; a hydraulic device for having a cylinder and a relatively movable main piston for adjusting the angular position of the cab with respect to the chassis; means for pivotally connecting said cylinder to said chassis; first and second fluid ports in said cylinder on opposite sides of said main piston; and lost-motion connection means for pivotally connecting said main piston to said cab and for permitting slight relative movement between said cab and chassis while said cab is in said over-the-road position while said cylinder and main piston remain relatively stationary with respect to each other, said lost motion connection means comprising a bore in said main piston, a lost-motion piston slidably mounted in said bore, means on said main piston for preventing said lost-motion piston from being expelled from said bore when said cab moves through said overcenter position and means for pivotably connecting said lost-motion piston to said cab.
Claim 8
Dependent Claim
37 words
A truck according to claim 5 including a shock absorbing means in said bore for acting upon said lost-motion piston to cushion the movement thereof relative to said main piston as said cab moves through overcenter position.
Claim 9
Dependent Claim
25 words
A truck according to claim 6 wherein said shock absorbing means comprises biasing means disposed in said bore on opposite sides of said lost-motion piston.
Claim 10
Dependent Claim
61 words
A truck according to claim 7 wherein said means for pivotally connecting said cylinder to said chassis comprises a pin on said chassis and a pin-receiving opening on said cylinder and wherein said means for pivotally connecting said lost-motion pistoN to said cab comprises a pin on said cab and a pin-receiving opening in the piston rod of said lost-motion piston.
Claim 11
Dependent Claim
243 words
In a truck having a chassis part and a cab part tiltably mounted thereon and movable through an overcenter position; a hydraulic device having a cylinder component and a relatively movable main piston component for adjusting the angular position of the cab part with respect to the chassis part; means for pivotably connecting one component at one end of said hydraulic device to one of said cab and chassis parts; and lost-motion connection means for pivotally connecting the other component at the other end of said hydraulic device to the other of said cab and chassis parts and for permitting slight relative movement between said cab part and chassis part while said cylinder and main piston components remain stationary with respect to each other, said lost-motion connection means comprising a bore in said other component, a lost-motion piston slidably mounted in said bore, means for pivotally connecting said lost-motion piston to the other of said cab and chassis parts, and shock absorbing means in said bore for acting upon said lost-motion piston to cushion the movement thereof relative to said other component as said cab part moves through overcenter position, said shock absorbing means comprising biasing means disposed in said bore on opposite sides of said lost-motion piston, said shock absorbing means further comprising a fluid passage communicating between said cylinder component and a port in said bore and a free piston disposed in said bore between said port and said lost-motion piston.
Claim 12
Dependent Claim
243 words
In a truck having a chassis part and a cab part tiltably mounted thereon and movable through an overcenter position; a hydraulic device having a cylinder component and a relatively movable main piston component for adjusting the angular position of the cab part with respect to the chassis part; means for pivotably connecting one component at one end of said hydraulic device to one of said cab and chassis parts; and lost-motion connection means for pivotally connecting the other component at the other end of said hydraulic device to the other of said cab and chassis parts and for permitting slight relative movement between said cab part and chassis part while said cylinder and main piston components remain stationary with respect to each other, said lost-motion connection means comprising a bore in said other component, a lost-motion piston slidably mounted in said bore, means for pivotally connecting said lost-motion piston to the other of said cab and chassis parts, and shock absorbing means in said bore for acting upon said lost-motion piston to cushion the movement thereof relative to said other component as said cab part moves through overcenter position, said shock absorbing means comprising biasing means disposed in said bore on opposite sides of said lost-motion piston, said shock absorbing means further comprising a fluid passage communicating between said cylinder component and a port in said bore and a free piston disposed in said bore between said port and said lost-motion piston.
Claim 13
Dependent Claim
67 words
A truck according to claim 9 wherein said means for pivotally connecting said one component to said one part comprises a pin on said one part and a pin-receiving opening in said one component and wherein said means for pivotally connecting said lost-motion piston to said other part comprises a pin on said other part and a pin-receiving opening in the piston rod of said lost-motion piston.
Claim 14
Dependent Claim
184 words
In a truck having a chassis and a cab tiltably mounted thereon and movable through an overcenter point; a hydraulic device having a cylinder and a relatively movable main piston for adjusting the angular position of the cab with respect to the chassis; means for pivotally connecting said cylinder to said chassis; and lost-motion connection means for pivotally connecting said main piston to said cab and for permitting slight relative movement between said cab and chassis while said cylinder and main piston remain relatively stationary with respect to each other, said lost motion connection means comprising a bore in said main piston, a lost-motion piston slidably mounted in said bore, means for pivotably connecting said lost-motion piston to said cab and shock absorbing means in said bore for acting upon said lost-motion piston to cushion the movement thereof relative to said main piston on said cab moves through overcenter position, said shock abosrbing means comprising a fluid passage communicating between said cylinder and a port in said bore and a free piston disposed in said bore between said port and said lost motion piston.
Claim 15
Dependent Claim
184 words
In a truck having a chassis and a cab tiltably mounted thereon and movable through an overcenter point; a hydraulic device having a cylinder and a relatively movable main piston for adjusting the angular position of the cab with respect to the chassis; means for pivotally connecting said cylinder to said chassis; and lost-motion connection means for pivotally connecting said main piston to said cab and for permitting slight relative movement between said cab and chassis while said cylinder and main piston remain relatively stationary with respect to each other, said lost motion connection means comprising a bore in said main piston, a lost-motion piston slidably mounted in said bore, means for pivotably connecting said lost-motion piston to said cab and shock absorbing means in said bore for acting upon said lost-motion piston to cushion the movement thereof relative to said main piston on said cab moves through overcenter position, said shock abosrbing means comprising a fluid passage communicating between said cylinder and a port in said bore and a free piston disposed in said bore between said port and said lost motion piston.
Claim 16
Dependent Claim
62 words
A truck according to claim 11 wherein said means for pivotally connecting said cylinder to said chassis comprises a pin on said chassis and a pin-receiving opening on said cylinder and wherein said means for pivotally connecting said lost-motion piston to said cab comprises a pin on said cab and a pin receiving opening in the piston rod of said lost-motion piston.
Claim 17
Dependent Claim
231 words
In a truck having a chassis and a cab tiltably mounted thereon and movable through an overcenter point; a hydraulic device having a cylinder and a relatively movable main piston for adjusting the angular position of the cab with respect to the chassis; first and second fluid ports in said cylinder on opposite sides of said main piston; means comprising a pin on said chassis and a pin-receiving opening on said cylinder for pivotally connecting said cylinder to said chassiS; and lost-motion connection means for pivotally connecting said main piston to said cab and for permitting slight relative movement between said cab and chassis while said cylinder and main piston remain relatively stationary with respect to each other, said lost motion connection means comprising a bore in said main piston, a lost-motion piston slidably mounted in said bore, means on said main piston for preventing said lost-motion piston from being expelled from said bore, and means comprising a pin on said cab and a pin-receiving opening in the piston rod of said lost-motion piston for pivotably connecting said lost-motion piston to said cab and shock absorbing means in said bore for acting upon said lost-motion piston to cushion the movement thereof relative to said main piston as said cab moves through overcenter position, said shock absorbing means comprising biasing means disposed in said bore on opposite sides of said lost-motion piston.
Claim 18
Dependent Claim
231 words
In a truck having a chassis and a cab tiltably mounted thereon and movable through an overcenter point; a hydraulic device having a cylinder and a relatively movable main piston for adjusting the angular position of the cab with respect to the chassis; first and second fluid ports in said cylinder on opposite sides of said main piston; means comprising a pin on said chassis and a pin-receiving opening on said cylinder for pivotally connecting said cylinder to said chassiS; and lost-motion connection means for pivotally connecting said main piston to said cab and for permitting slight relative movement between said cab and chassis while said cylinder and main piston remain relatively stationary with respect to each other, said lost motion connection means comprising a bore in said main piston, a lost-motion piston slidably mounted in said bore, means on said main piston for preventing said lost-motion piston from being expelled from said bore, and means comprising a pin on said cab and a pin-receiving opening in the piston rod of said lost-motion piston for pivotably connecting said lost-motion piston to said cab and shock absorbing means in said bore for acting upon said lost-motion piston to cushion the movement thereof relative to said main piston as said cab moves through overcenter position, said shock absorbing means comprising biasing means disposed in said bore on opposite sides of said lost-motion piston.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |