US3768744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Food waste disposer
Assignee: Westinghouse Electric Corp
•
Filing: 1971-12-17
•
Granted: 1973-10-30
•
Expires: 1991-12-17
Abstract
Abstract A batch type food waste disposer has a rotatable stopper including camming means which engages and moves the actuator of the operating switch inwardly when the stopper is turned to energize the food waste disposer. The rotatable stopper also includes a ledge arrangement which engages beneath laterally projecting portions on the food waste disposer so that the stopper is maintained vertically stationary so food being comminuted by the disposer does not tend to dislodge the stopper or interfere with its actuation of the food waste disposer actuating switch.
Inventors
- 👤 J Bebinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:51
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/26; E03C1/266; E03C1/2665
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
185 words
A batch type food waste disposer including: a hopper with a throat in its upper portion bounded by inwardlydirected flange means defining an opening having opposite straight side edges and arcual end edges; a switch for controlling disposer operation mounted outside said hopper and including a switch actuator extending into said hopper below said throat, said actuator having a head thereon; a sink stopper including a circular upper portion carrying gasket means and adapted to seat on the top of said throat in one rotative position and the lowermost stopper level to seal said throat, said stopper including successively lower sections having exterior shaped surfaces adapted to be received through said throat when said stopper is in said one rotative position, said stopper having a higher level position to open said seal and permit rotation of said stopper in one direction to a second rotative position, said stopper having a lower end portion including cam means for engaging said head of said actuator to draw said actuator radially inwardly to effect closure of said switch as said stopper is rotated to said second rotative position.
Claim 2
Dependent Claim
185 words
A batch type food waste disposer including: a hopper with a throat in its upper portion bounded by inwardlydirected flange means defining an opening having opposite straight side edges and arcual end edges; a switch for controlling disposer operation mounted outside said hopper and including a switch actuator extending into said hopper below said throat, said actuator having a head thereon; a sink stopper including a circular upper portion carrying gasket means and adapted to seat on the top of said throat in one rotative position and the lowermost stopper level to seal said throat, said stopper including successively lower sections having exterior shaped surfaces adapted to be received through said throat when said stopper is in said one rotative position, said stopper having a higher level position to open said seal and permit rotation of said stopper in one direction to a second rotative position, said stopper having a lower end portion including cam means for engaging said head of said actuator to draw said actuator radially inwardly to effect closure of said switch as said stopper is rotated to said second rotative position.
Claim 3
Dependent Claim
45 words
A disposer according to claim 1 wherein: said stopper includes means at an intermediate level defining generally diametrically-opposite grooves adapted to receive said straight side edges when said stopper is in said second rotative position to prevent vertical disengagement of said stopper from said hopper.
Claim 4
Dependent Claim
46 words
A disposer according to claim 1 wherein: said lower portion of said stopper includes detent means adjacent said cam means for preventing rotation of said stopper back toward said first rotative position from said second rotative position from vibration and jarring by waste particles being ground.
Claim 5
Dependent Claim
69 words
A disposer according to claim 2 including: corner means at one end of each of said opposite grooves, said corner means spanning a distance slightly less than the distance between diagonally opposite corners of said throat so that said corner means serve as stops preventing rotation of said stopper in said one direction beyond said second rotative position, and in the opposite direction back beyond said one rotative 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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |