US5022778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pivot shaft
Assignee: Individual
•
Filing: 1990-11-02
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Granted: 1991-06-11
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Expires: 2010-11-02
Abstract
Abstract A pivot shaft constructed with a holder having a base and a vertical mount for a sleeve with a pair of diametrically opposed notches to lock into, above the base is a spring, a washer, and a nut. The spring has one end inserted into a hole of the base and another blockaded by a outer edge of a washer. A shaft consisting of a head, a cylinder, and a threaded portion locks into the sleeve, the vertical mount, the spring, and the washer by engaging with the nut.
Inventors
- 👤 Sheng N. Lu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:26
CPC Classifications
F; F16; F16M; F16M11/00; F16M11/02; F16M11/04; F16M11/06; F16M11/10; G; G06; G06F; G06F1/00; G06F1/16; G06F1/1613; G06F1/1633; G06F1/1675; G06F1/1681; E; E05; E05D; E05D11/00; E05D11/08; E05D11/081; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/1207; E05F1/1215; E05F1/1223; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/21; E05Y2201/25; E05Y2999/00; F16C; F16C11/00; F16C11/04; F16C11/10; F16C11/103; F16M2200/00; F16M2200/02; F16M2200/021; F16M2200/022; F16M2200/04; F16M2200/041; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32614; Y10T403/32819; Y10T403/32827; Y10T403/32836
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
255 words
A pivot shaft comprising: a holder having a base and a vertical mount, said base having two pairs of side holes and a pair of joint holes, said vertical mount having a shaft hole; a sleeve having a first pair of diametrically opposed notches fitted into said shaft hole of said vertical mount, and providing an inner tapered portion for a shaft to pass therethrough and be rotatable therein; said shaft constructed with a head, a cylinder, and a threaded portion which are integral, said head having a second pair of diametrically opposed notches, and a tapered portion provided between said head and said cylinder engaging with said inner tapered portion of said sleeve, said tapered portion on the shaft having a peripheral groove with a pair of channels disposed perpendicular thereto, said cylinder having a third pair of diametrically opposed notches near a boundary of said cylinder and said threaded portion engaging with a washer; a spring provided about said shaft between said vertical mount and said washer, and a first end of said spring inserted into one of said joint holes and a second end of said spring abutting an outer edge on said washer; said washer having said outer edge to block said second end of said spring and an opening for said threaded portion of said shaft to pass therethrough, said third pair of diametrically opposed notches of said cylinder engaging with said opening; and a nut having an inner washer for said threaded portion to pass therethrough and fasten therein.
Claim 2
Dependent Claim
255 words
A pivot shaft comprising: a holder having a base and a vertical mount, said base having two pairs of side holes and a pair of joint holes, said vertical mount having a shaft hole; a sleeve having a first pair of diametrically opposed notches fitted into said shaft hole of said vertical mount, and providing an inner tapered portion for a shaft to pass therethrough and be rotatable therein; said shaft constructed with a head, a cylinder, and a threaded portion which are integral, said head having a second pair of diametrically opposed notches, and a tapered portion provided between said head and said cylinder engaging with said inner tapered portion of said sleeve, said tapered portion on the shaft having a peripheral groove with a pair of channels disposed perpendicular thereto, said cylinder having a third pair of diametrically opposed notches near a boundary of said cylinder and said threaded portion engaging with a washer; a spring provided about said shaft between said vertical mount and said washer, and a first end of said spring inserted into one of said joint holes and a second end of said spring abutting an outer edge on said washer; said washer having said outer edge to block said second end of said spring and an opening for said threaded portion of said shaft to pass therethrough, said third pair of diametrically opposed notches of said cylinder engaging with said opening; and a nut having an inner washer for said threaded portion to pass therethrough and fasten therein.
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) | 1994-06-10 | 1994-12-10 | 1995-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-10 | 1998-12-10 | 1999-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-10 | 2002-12-10 | 2003-06-11 | $7700.00 | Window Closed / Lapsed |